09-15 Duramax Allison Replacement T14 / A50 TCM

The A50 Transmission Control Module found in the 2009-2015 Duramax is prone to failure. The internal circuit board fails and is not serviceable.  When this failure occurs the truck owner may experience Range Shift Inhibited, Service Brake System, Service stabilatrak, loss of gear shift indicator, slamming into Drive or Reverse, and DTC U0101 for loss of communication with TCM.

This repair at a dealership can cost $700-1000 on average plus the tow bill to get the truck there.  Other TCMs on the internet are blank and still need the dealer to program it.  Then there is that tow bill again. Both options are costly and give you a stock TCM calibration when you're done.  Who wants that?

Benefits of our Enhanced TCM include:

• Improved throttle response.
• Revised shift strategies for better shift rpm and quality.
• Improved Torque converter lock-up.
• Increase MPGs.
• Extend transmission life.
• Works with factory or aftermarket ECM programming.  

This plug and play TCM is delivered right to your door and takes roughly 5 minutes to install.
No dealer visit.  

Limited Lifetime Warranty.

We offer our Pre Tuned A50/T14 TCM that is programmed with our Custom EFILive calibrations.  This plug and play TCM will improve the shift quality and drive experience with your truck.  We raise the shift points for 4th, 5th and 6th gears to keep the engine in a better rpm range to prevent it from lugging.  This is nice especially if you have larger tires.  We adjust torque converter lock up strategy to put the power to the ground sooner under full throttle and keep it locked during shifts.  We adjust the torque limits to allow the truck to make more power above 3000 rpm at full throttle and improve throttle response when leaving a stop. 

Fits Chevrolet and GMC 2500HD and 3500HD Pickup and Cab&Chassis trucks.  10th digit of VIN being a 8, 9, A, B, C, D, E, F.  Trucks with 10th digit being a F please visually inspect your TCM to see that it matches the one in the picture.  TCM is located on the fan shroud by the drivers side battery.  The late 2015s came with the T87 TCM.

This TCM is delivered right to your door and takes roughly 5 minutes to install. 

No core required. 

Dan's Diesel Performance part nubmer: DDP-A50

Lifetime Warranty

NO RETURNS ON TCMS ONCE THEY HAVE BEEN INSTALLED!