DIESELR EZ Lynk Transmission Tune File T87A (2017–2019 6.6L L5P Duramax)

If you’re running a tuned L5P but still stuck with stock TCM mapping, you’re not getting the performance your truck deserves. The DIESELR EZ Lynk T87A Transmission Tune File is the missing piece. It’s built to refine shift timing, torque management, and drivability—eliminating sluggish shifts and gear hunting.

This calibration is built specifically for the 2017–2019 L5P Duramax equipped with the T87A module. It’s designed to pair seamlessly with your DIESELR engine tuning, delivering smoother shifts, stronger torque transfer, and reliable drivability whether you’re hauling heavy or cruising light.

What You Get

• Transmission Tune File – Custom-calibrated for your truck. Refines shift firmness, reduces flare, and optimizes converter lockup for towing, throttle response, and daily driving.

Why Choose DIESELR TCM Files?

✔ Perfectly matched with DIESELR engine tuning
✔ Faster, crisper shifts under load and WOT
✔ Less gear hunting, more control when towing
✔ Stronger, safer torque delivery to the ground

Don’t let factory TCM mapping keep your L5P from its best performance. With DIESELR, every shift counts.