Mack truck shifting. ©2016 Mack Trucks.

Mack truck shifting I heard that many shift a 12 speed just like a 5 speed and just split the top gear for overdrive. SEMI TRUCK. 1st low is the lowest ger you have. The items requiring fabrication are: See the “Range Shift Valve for Mack T200 and T300 Series Transmissions”, page 7 . We offer a wide variety of semi truck parts and accessories from brand names that earned the respect of professional drivers and mechanics. The only time I used the clutch in a Mack was to get the truck moving. Like it all worked together the way it was designed to. 1st, 2nd and 3rd gears won't shift until around 20 to 22 RPMs. The vehicle must be brought to a complete stop, transmission shift pad set to neutral then select the range (N1/N2) while stationary. it still does the same thing I been having it on the road every day. You can see where the ratios overlap, and would be skipped. LOW-SPEED MODULATION CONTROL Provides smooth, low-speed control at idle speed without the use The engine braking and/or friction is a little too aggressive for my taste and for manual shifting with a clutch. I am looking for something with a more vintage look. Trucks used by a specialized hauler of very heavy equipment, need a variety of forward speeds to help keep the engine RPM in the power band. I was probably 13 at the time. Old pro Doug Cutler Sr. The shift tag above the windshield shows five speeds. Can spend about 5k. This popular comforable boot is a great choice for warehouse staff, construction workers Feb 3, 2007 · BigMackTrucks. This truck sounds awesome with the big Mack Thermodyne diesel roaring away as the driver works the two-stick transmission smoothly through the gear range. Any advice the truck will be a e9 v8 w/ 12 speed mack 4:64 rears. This truck was on the Mack calendar - Jan 1999 as if anyone cares but that trans was nice - you could drive it like a 5 & 2 grain truck. 1 13 Speed Shift Knob Shifter/Transmission Parts Heavy Duty Trucks Replaces Eaton Fuller A-6913 A-4900 Freightliner 455-5002 Mack 455-5002 TRA6913G 4. Two stick Mack duplex, triplex or quad box transmission and then just add another stick for the brownie. Mar 20, 2020 · We’re grabbing gears two sticks at a time in a 1965 Mack truck equipped with a Mack Triplex transmission. Nov 18, 2020 · My equipment. TO BE CONTINUED, wil ©2016 Mack Trucks. Style. The limit to this truck on the road was the pyrometer. Shop Mack truck shift knobs and covers online from Chrome Country. Auto neutral m Drive has got your back. Our Vendors and Advertisers Apr 11, 2023 · Hello i have a Mack Trident 2013 model mp8 535hp with the m drive auto transmission. When I release the brakes, I get a smooth slow release of air rather than the burst you're expecting. That was the steadiest truck I ever drove. Dec 18, 2017 · That old V-8 Mack was governed at 2200 rpm, good for 72 mph. That's a really good setup for a truck that's a local vocational truck, like say something for a paving contractor. Apr 11, 2017 · It's probably a Maxidyne engine then, and the transmission would be a 5 or 6 speed wide ratio Maxitorque with one or two low holes. About Press Copyright Contact us Creators Advertise Developers Terms Privacy Policy & Safety How YouTube works Test new features NFL Sunday Ticket Press Copyright The Cummins L9N natural gas engine delivers clean and efficient power for Mack Granite, TerraPro, and LR trucks. May 19, 2009 · A Mack Quadruplex is a 5x4, all in one integral unit, as opposed to other types of 5x4 setups that use a 5 speed main transmission connected to a 4 speed auxiliary transmission with a short external driveshaft & U joints between the main & auxiliary. EASY TO OPERATE. It has two sticks. I still can't find anyone here in south Florida who works on them. Apr 2, 2014 · i have a 1991 688 dump truck with a 400hp and 12spd, ive just had the truck for about a yr and dont use it eveyday. They are suppose to be square with sharp edges. With that 500, it didn't matter how heavy you were loaded. 3rd low is basicly the same as 2nd direct. (Requires Mack Premium shifter package) Feb 14, 2015 · 2006 CH600, 427 AC engine (recently rebuilt), Eaton 10 speed. Recommended to be used with Titan Heavy Haul over 80 metric tons / 176k lbs. American Truck Enthusiasts o r n s t p e o d S 2 i 4 a t 2 3 6 2 , r c 0 F 5 0 i i 9 2 4 u y m 0 7 c 3 6 7 3 6 9 i r 7 i 2 6 l 1 9 c b e u 8 0 · Shared with Public ©2016 Mack Trucks. Im looking for any advice or info that would be helpful. Jun 3, 2008 · Normal driving just leave the compond stick in direct. Nov 23, 2020 · Based on the gearbox ratios I got off another Wiki article, here are all the effective ratios for a TRQ-7220 Quadruplex. The truck is a 1987 tri-axle Mack with a 500 HP Mack engine. it sometimes takes long to shift and now when u press the brakes it won't go into neutral it stays in drive unless u press like mDRIVE™ and mDRIVE HD. Nov 20, 2022 · Hello again. com Apr 17, 2010 · Hello AllI am looking to buy a R model. 50 0:43 May 10, 2016 · Get a feel for the particular truck. youtube. After we go through what’s unique about the MaxiTorque TM-309M 9-Speed Transmission, and we learn how to REALISTICALLY shift (rather unique), we take it on a Jan 28, 2022 · Hi guys I have a 2016 pinnacle with an Mdrive I’m having isssues with the gear selector. that being said the wide rpm range from lo lo/first to direct /1st is most often not possible to do in the slightest bit of soft ground. I think this affects the automatic shifting as well. LOW-SPEED MODULATION CONTROL Provides smooth, low-speed control at idle speed without the use Dec 8, 2017 · It wasn't fast but it seemed like that truck was designed in such a way for that gearing. Feb 18, 2024 · when the transmission was done I would hook air to it and bench test it for shiftability including range shifting. 4th low is basicly the same as 3rd direct i hollowed out the muffler not mufflers this Mack only has one stack. While all m DRIVE units are built using only Pure Mack parts and remanufactured by Mack-certified, factory-trained technicians, the m DRIVE Complete is your best solution. You will eventually be able to shift without touching the clutch( except when starting out). It is recommended for livestock hauling, liquid bulk haul and similar applications where load shifting must be minimized. Is it possible to shift the 5+4 as only a 5 speed. After that it shifts fine until you press the breaks. driving the 1964 Mack B61SX. If you don't have experience operating the clutch and driving a manual transmission vehicle, shifting a semi truck is going to have a much larger learning curve. There will be no specific Mack model or years of production other than back when truck manufacturers would build whatever the customer wanted. May 30, 2008 · 5 speeds on the stick in the standard "H" pattern, reverse is on the air shift knob, enabling the use of all 5 speeds in reverse as desired, also on the air shift knob is a hi/lo splitter which you can use to split each of the 5 gears in half, similar to operating a 2 speed rear. Sep 26, 2005 · Hi, I have two trucks with duplex transmissions, one is a trd720, the other is a trd72. Most non-Mack Jan 2, 2010 · Actually the Mack 7 speed T2070 was a single stick transmission with R and 1 thru 5 on the stick and a hi/lo air shift button on the knob which was supposed to be used in 1st or 2nd for a total of 7 forward speeds and 2 reverse. Get great deals on Mack semi truck replacement shift knobs at TRUCKiD. Cost-effective. the governor is set at 125 psi. Which reminds me I need to submit feedback to that effect. Trucks with 350 Cats, even ones that have been turned down,cas Oct 15, 2020 · Dexonu Heavy Duty Trucks 13 Speed Shift Knob Shifter Transmission Parts Compatible with Freightliner Eaton Fuller Mack A-6913 A-4900 455-5002 455-5002 TRA6913G 5 $14. One day it will just happen. Some want to wind up over 1800 rpm's to shift and are governed in top gear at Mar 31, 2022 · A little update- finally got someone to scan truck- who professes NO Mack experience. 888-903-4343 Apr 17, 2010 · Hello AllI am looking to buy a R model. Is the Black plastic shifter with the Blue up/down range selector the only style that Mack offered. Oct 6, 2021 · @ebinmaine I actually learned how to drive a truck in an old Mack with the same setup you're referring to. May fit other transmission models. The truck makes a loud squeak noise when it changes to the high range in the box from 6 to 7th or 8th and somtimes when it dose the noise it will clunck into the gear. He isn't even using the clutch. 888-903-4343. The truck could be a runner with a different transmission, like say a 10 speed, but then again it is a dump truck (not meant to go fast, meant to haul a heavy load). Designed for the trucks that shoulder your largest loads, Heavy Haul Shift offers even more performance-oriented shift points and less Jul 29, 2024 · Grip the gear shift so that your index finger is available to work the range switch, and the middle and thumb can work the high/low splitter. Header with mark. 10 speed Sep 2, 2023 · Pull the floor pan, then pull the stick out, 4 bolts for a Mack tranny, 6 for an Eaton/ Meritor then put the shift forks in neutral. Sep 26, 2014 · This truck has a stick with a disabled air splitter on it that I assume corresponds to whatever transmission is down there, but the shift patterns on the cab roof (which match the shifter) look like the TRL078 *with reverse on the main stick. Jan 13, 2007 · The forum is owned and maintained by Watt's Truck Center, Inc. Loaded or empty it ran 72 mph. I think the 1200-2100 rpm band makes splitting this a bit more difficult. When the church is released it grinds in 6th - 10th gear. Surprisingly we have some MP-7, 395 with Allisons that will leave that E-9. I'm not an expert but I'll do my best to show how to shift a 12 speed Mack transmission. Its an automatic Allison Transmission. an independent, full service Mack dealer. The m DRIVE Complete: Is the m DRIVE Basic plus the clutch control actuator, top shift cover, and the transmission's electronic control unit. Please subscribe!! Partsam Amazon Store - Nov 15, 2015 · I have the recommended shifting pattern for a B61 from a manual, but it's for a triplex. LOW-SPEED MODULATION CONTROL Provides smooth, low-speed control at idle speed without the use Apr 15, 2009 · How about some help. With Pure Mack mDRIVE and mDRIVE HD automated manual transmissions, there’s no clutch pedal. Any advice wou Oct 11, 2024 · I have a 2000 ch613 that recently started clicking in the high range gears. Trucks use in recycling Field. Sep 26, 2005 · Also is there any online info on the different mack twin sticks and diagrams/pictures/instruction on the shift patterns? How does one shift progressivly through the gears? I saw one mack on ebay that had a real weird shift pattern that loked like an incomplete H shift pattern like this : Nov 6, 2023 · In this video i teach both you and my good friend Jimmy the Atlas How To Shift a Big Rig! Plenty more teaching videos to come! I hope you enjoy watching. 0 Change. ©2016 Mack Trucks. then I would set the PTO'(s) and be done. This is probably one of those new guy que Are you currently learning how to shift a 10 speed transmission? Our 10 speed shifting tips video has many valuable tips to help you become a better shifter. Get the double clutching down, get the CDL and then move ahead. 2015 Mack chu613 Pinnacle MP8 mDrive Bought at 212 thousand miles (March 2020) Now at 279 thousand miles (Today, Nov 2020) The transmission problem is that it started to not have any power or engagement in the even numbered gears (2,4,6,8,10,12) rpms to 1000 but no power . I only let him run a few days, it did it only a few times, but of course I couldn't replicate the condition. to deliver smooth shifts every time, while also May 13, 2017 · Three sticks are out there. Massive selection from top brands on eBay. I'm here to assist you in resolving the issue with your 2012 Mack truck's Allison 4500 transmission not shifting out of 1st gear. The general technique to shift any transmission is Feb 7, 2024 · This is a cool video showing a driver expertly working a Mack Triplex transmission in a vintage 1964 Mack B-61 truck. Some don't have any indication whether they are a 9, 10, 13, or 18 speed on the gear shift. May 14, 2022 · I remember when the pattern was 5 in low range and it was a over drive 9 speed with 5th gear down to the botton right. Get great deals on Mack semi truck shift knobs at TRUCKiD. E7 380HP, 10 speed eaton. I typically drive a few dozen different trucks each month for various customers. Look for rounded square slots on top of the shift forks. not available through the MACK Trucks Parts System but they can be fabricated by any reputable Machine Shop by supply-ing them a copy of pages 6, 7, and 8. I really want a truck that is ALL Mack. 1st, 2nd, 3rd, split 4th, 5th flip to overdrive 75 mph. I haven't yet had the pleasure to encounter a twin stick. Get great deals on Mack Granite Series shift knobs at TRUCKiD. Air operated selector has hi, low, neutral and reverse thumb selector. My issue is i can shift the truck fine running through the gears but when it comes time to shift down ill shift from 5 h to 5L it wants to grind for a bit going in. I just got thr truck and have basically been driving it as a six speed. with the giant rears, 8LL and 427 engine, i could idle in lo lo under a milling machine. shift the main 1-2-3-4-5. . 90% of his miles were on dirt roads and private lease roads, I would go with him to work on Saturdays and drive the truck in the afternoon while he sat in the We offer a wide variety of semi truck parts and accessories from brand names that earned the respect of professional drivers and mechanics. I seem to be able to up shift but have a little problem down shifting. Sep 30, 2009 · mack says to shift like this "low" 1st- shift to direct 1-2-3-4-5 = 6 gears total. Geared up for any job. 12 Volt Clutch Control Solenoid for Volvo & Mack . I will start with the trd720, this is simple, 5 speed box with low and direct rear box, this trans has 5 progressive ratios, with no overdrive, so it is shifted 1st, low then high, 2nd low then high, and so on, 10 gears the other trans screws things up some, the front box has 5 progressive ratios BUT 4 Enhanced "Bad Roads" Shifting. DRIVE. october 2005 (revised) 10-202 range shift troubleshooting procedures t300 series mack transmissions includes tm308 and tm309 not shown. Watch a lime green Mack truck with a Tri-Plex transmission in action. (Optional with Mack Fleet shifter package) Heavy Haul Shift Meet Mack’s most assertive shift strategy yet. Available with optional 13- and 14-speed creeper gears, the Mack m DRIVE™ HD transmission provides flexible gearing for low-speed applications, as well as improved startability for heavy loads, while maintaining proper gearing for fuel efficiency at speed. When truc start shifting from 3rd gear. 2nd low is basicly the same as 1st direct. Jan 13, 2007 · I ran that truck up and down the eastern seaboard I can remember driving the truck, but I can't remember anything about shifting it. Mack 12 Speed Transmission Shifter Knob. You can also see why some of the LO-LO ratios would not be useful in a progressive sequence. Available with optional 13- and 14-speed creeper gears, the Mack m DRIVE™ HD provides flexible gearing for low-speed applications, as well as improved startability for heavy loads, while maintaining proper gearing for fuel efficiency at speed. I’m loosing like 3-5 mph every time I shift gears in the trucks (semi or pickup). There are 5 speeds in reverse and you can back up at close to 30mph, came in handy when you had to back in to the paver almost a mile. in the mud or offroad put the compound in low low, main in 1st, crawl out to level hard ground and then shift the compound into diect. And it only does it when I let off the accelerator and the engine is slowing the truck down. I had one so i started to shift that way. I like an 18 spd myself because it can be shifted several different ways, 8,12 or 16 depending on the load plus the low hole that is rarely used making 9, 13 or 18 spds. this is my 2000 mack CH612. 2 out of 5 stars 55 Customer: My Mack truck isn't shifting right. Great deals. if u listen to other vids of this mack u can tell the difference. Jul 31, 2006 · How to shift a Mack B Model. I would put the stick on it and hook shop air to the shift cover, run all lines correctly and use my home made crank to operate the transmission and all its gears and ranges. (Optional with Mack Fleet shifter package) HEAVY HAUL SHIFT Designed for the trucks that shoulder your largest loads, Heavy Haul Shift offers even more performance-oriented shift points and less skip shifting. Dec 17, 2006 · BigMackTrucks. Those could have been u In fact, AMTs are so popular that Mack Trucks now offers the mDRIVE™ automated manual transmission as standard equipment on all Mack® Pinnacle®, Granite® and Titan by Mack models: The mDRIVE transmission features 12 speeds and an impressive base torque input capacity of 1,920 lb. A more aggressive shift strategy than “Bad Roads” for heavy haul applications with more performance-oriented shift points, less skip shifting and more. This system requires dry, clean air to perform appropriately or the solenoids in this valve assembly can become stuck from moisture and debris. -ft. Same Truck as the Other Shifting Video, Now with 3 Sticks Nov 28, 2019 · back with another shifting video with my mini mack. View our chrome truck accessories and parts in stock in store or online. After changing; the high/low selector fork, the clutch, and high/low selector valve, the truck still grinds and won't shift into any of the high range gears. Down shifting takes time and practice. Feb 19, 2009 · Hi Michael, thanks for your input and reccomendations. No help. Mack came out with a update saying on same trans to start coming out of 4th at the top right and range into hi and go to 1st which is bottom left saying the range was being made at a slower speed saving the hi/low clutches. Shifting is operated by intelligent software and engine integration to continuously monitor changes in grade, vehicle speed, acceleration, torque demand, combined vehicle weight and air resistance to optimize fuel economy on every drive. I have completely rebuilt my shift top cover, all shift cylinders, and checked regulator pressures to each one. I've had a few people asking about what it is and for a video of shifting. Thanks Shop Car & Truck Shift Knobs for Mack with eBay Guaranteed Fit. How to skip ge mDRIVE™ and mDRIVE HD. Jan 12, 2022 · Well since I last posted about my issue with the MDrive slipping in and out of gear . It's a six cylinder gas engine. com/watch?v=z6AKaBeRNU8Hi there, this is Michael Fox at CDL Colleg Jun 4, 2020 · The one I drove had a Mack Dynatard engine brake which help with quick shifting when necessary. It’s most likely a black plastic thread in type and has a jam nut. SS-MDRV-0316-VSA MACK mDRIVE ® TRANSMISSION EASY SHIFT Provides smooth, precise and less aggressive shifting. Always have liked Macks but never had the money to buy one, but now I do. i also raised the shi Aug 27, 2018 · I have a 07 mack cl700 dump I've been having issues shifting into low range it will grind and not move I have put over 10,000 dollars into this truck over last week or so new Tranny new shift selinoid and new shift handle and still having same issue has anyone else had this problem and if so what was the cause it's an 18 speed Tranny Sep 5, 2010 · Name: B Model Shifting Category: Antique and Classic Mack Truck Videos Date Added: 05 September 2010 - 07:03 AM Submitter: Gr8oldies Short Description: None Provided My grandfather taught me to shift a duplex when i was 15 years old(Did I mention he would slap me in the back of the head when I missed a gear! Oct 2, 2023 · Driver reported it randomly wouldn't shift to high range, very intermittent. Does anyone have an actual manual page that shows the recommended shifting pattern/order for a quadruplex for both upshifting and down shifting? Mack trucks use transmissions made by several different manufacturers so truck buyers can more match the truck to the job. Customer: Hi I am working on Mack antham truck . Are all the 5+4 made by Mack. Do you run through all five gears then shift the second lever and run through all five again? I'm a newbie so please forgive my ignorance. We have 10 units and all units have MDRIVE transmission. some like me do this "low" 1-2-3- shift to Direct 3-4-5 = 6 gears total. perfect truck for milling and paving, or off road on site use. The Mack 18 speed transmission is a crucial component of heavy-duty trucks that require powerful and versatile shifting capabilities. Jun 14, 2011 · Driver was Richard McCracken Jan 15, 2011 · Since you are trying to get your CDL and everything you do is being supervised try and shift around 1500+-50 rpm 1450-1550 rpm. It is designed to provide maximum traction and control while hauling heavy loads or navigating challenging terrain. Let's work together to troubleshoot and address the P2714 code to get your truck back in proper working order. Loads are too heavy. improves starting and shifting on rough terrain. Thanks Truck Diagnostic System (TDS) is our easy-to-use PC-based diagnostics software solution designed specifically for fleets who own US07, US10 or US13 model Mack trucks. Reduce wear and tear on your drivers with transmissions that make shifting a breeze and help drivers finish the job strong. 2006 SERVICE BULLETIN Number: SB324013 Date: 02/14/06 Model: T200, T300 (Does not apply to Mack Trucks Australia) Rear-Mounted Range Shift Cylinder Rebuild Procedures During mid-November 2005, the special service tools needed for rebuilding the two-position Want to learn how to shift a 10-speed transmission? Watch our tutorial https://www. I ho May 28, 2006 · I havent had much practice with shifting mack trannys. This video gives a demonstration of how to shift an 18 speed big truck, along with a bit of advice to help a new driver. m Drive shifts to neutral if the engine is turned off to prevent accidentally starting the truck while in gear. Sep 22, 2022 · BigMackTrucks. com is a support forum for antique, classic and modern Mack Trucks! The forum is owned and maintained by Watt's Truck Center, Inc. Hello, my name is ***** ***** I am a Medium and Heavy Trucks expert here on JustAnswer. Sep 30, 2023 · 1956 Mack LTH with a Cummins Big Cam 3 400hp and a Mack quadruplex twin stick transmission. In regard to the 5+4 transmission. Oct 2, 2006 · New Truck Drivers: Get Help Here - trouble shifting a mack 10 speed - Hi there, so im new to truck driving(1 month) i decided to change careers after 15 years in construction. When the parking brake is applied and the transmission is left in gear, it will automatically shift to neutral after four minutes to reduce the load on the drive train. Then I've driven the Mack Rd with a 350/ 400 engines, and they had 8ll transmissions. Oct 14, 2018 · Mack T2100's are defiantly not a fast shifting thing. LOW-SPEED MODULATION CONTROL Provides smooth, low-speed control at idle speed without the use SERVICE PUBLICATIONS, ALLENTOWN, PA 18105 ©MACK TRUCKS, INC. they get rounded over time due to not shifting a correct 'H' pattern, basically sliding the shifter in a 'Z Customer: I have a 2014 mack pinnacle cxu613 mp8 truck. Nov 15, 2015 · BigMackTrucks. This truck had sat for nine years without being started prior to my ownership and my problem is most likely nothing more than lack of use. Dec 28, 2019 · Here is a video talking about the 2 stick 6 speed Mack Trans in Deputy Dog. It goes Feb 17, 2022 · the 03 DR was built for off road use. Dad was working for a company hauling produced saltwater from oil and gas wells to a disposal well. the Mack dealer will buy the DEF is deleted. one of my first trucks bought. Also rebuilt the valve in the cab. Oct 14, 2019 · I'm a shop foreman for a small yard in New Mexico, and I've got a strange issue. Nov 7, 2011 · BigMackTrucks. 50 $ 14 . Mar 11, 2018 · Shift patter as follows Lo lo/ 1st, shift the compound into Direct / keeping main in 1st ,2nd,3rd,4th,5th this gives you 6 forward speeds total. Thanks Mack transmissions keep your trucks out of the shop with superior design, tougher materials and American manufacturing. I am curious about different styles of shifter knobs for the 2070 and 2080 transmissions. More Interior; Exterior; Truck The Mack Workwear Shift Zip Boot is a low-cut hiker style lace-up ankle boot with an industrial grade zipper, so you dont have to worry about tying up laces everday. Pretty much just drove an automatic and an Fuller 8LL a little. Bob driving his 64 B61 Mack original thermodyne engine tri-plex trans. It clicks and feels like it's coming out of g Sep 27, 2005 · This transmission works pretty good for a dump truck but is slow on the highway. odd number gears working fine, but the mDrive still moves to the even gears and thus I get stuck Shifting an 18 speed. Its a 2002 granite mack dump truck, with a 10 speed transmission. But on a 18 Going thro the gears early 90s late 80s Mack truck ten wheeler Oct 30, 2015 · I'm new to Mack trucks and was wondering about the shift pattern on a b 42. over view. Any and all suggestions on properly shifting a Duplex would be aprreciated. Usual gross weight between 78,500 and 80,000When pulling a hill, is it better to downshift at 1200 rpm or 1400?The storyI have been downshifting at 1200 when pulling hills. 67 year old brains don't work as good as 30 year old ones. The forums are not affiliated with Mack Trucks, Inc. The Quadbox transmission has 18 speeds and two shift levers. it sucked for on highway though, cause i would hit the rev limiter around 58 MPH. Its great and Im loving it. 888-903-4343; Shopping Cart 0. Used in conjunction with an RP1210A compliant vehicle interface adapter, TDS software reads vehicle controllers on the truck and displays detailed fault codes and component data mDRIVE™ and mDRIVE HD. Killer stuff! Jun 6, 2021 · The spedo sensor is on the back of the trans between the yoke and the aux case. Recommended for loads over 160,000 GCW. This clutch control solenoid controls the air for shifting in I-shift and mDrive transmissions in Volvo and Mack Trucks. • Item 4 “Spacer Block”, page 9 • Item 7 “Detent Pin Dec 30, 2009 · Hello Truckers, Just bought a Truck with a Mack 13 speed, I'm a little rusty on my shifting, use to ten speeds, what is the proper way to down shift a 13. This is my grandfathers truck and the truck I learned to drive in BigMackTrucks. For the down shifting try braking a little (like 5mph) and then a quick blip of the throttle and shift into gear. Mack transmissions were designed to be power shifted. A short clip of me shifting mack dump truck. It's a 10 speed and it mostly does it in gear 4, which is the 1st high range gear. Should work fine, the Maxidyne engine has a 1200-2100 RPM power band so it should work fine with the 7 speed Maxitorque. Alot of low end power though. No active ECU or VECU codes, but trans codes are: MID 130, PID 36- clutch wear status, and PSID 28- transmission brake. Enhanced Construction Shift maximizes gradeability and improves starting and shifting on rough terrain. The air compressor will build air pressure to about 110 psi and stop. I think they need to roll a little more. I have a Duplex behind a Maxidyne. While driving the truck the gear selector will go black and then the transmission shifts into neutral you have to punch the dash to get it to light up again and it will shift back into gear any ideas what’s c mDRIVE™ and mDRIVE HD. So I parked the truck for about 10 months, decided today before work to see if it did it for me, and it did, but now it won't shift into high range at all. During the body upfit, are programming the PTO parameters so the truck operates to the customer’s requirements covered by the Mack warranty? PTO parameter programming is considered part of the body upfit expense. My problem is with the truck Im driving. bnngp scwse dqcvelxl vbyl vut hgr qase idj klqii gqyix blj ndgssw zuhpb bruqgn ypossk