Transmission Digest

09/17/2026

In the latest TASC Force Tips article, we will explore some of the physical variations of the Gen. 1 8L valve bodies and learn details about which parts are interchangeable, and which are not.

We explore some of the physical variations of the Gen. 1 8L valve bodies. We go over which parts are interchangeable, and which aren't.

09/15/2026

Through the years, we’ve learned about specific transmissions which are prone to having a stripped spline or a broken coupling cause a lost connection in the gear train. Here's one such story:

A clue to the cause of this was a grinding noise that could be heard near the transfer case.

09/10/2026

A customer brought in a very clean 1994 Mustang GT convertible with a 5.0-liter engine and AODE transmission. With only 85,000 miles, the customer’s complaint was an occasional slipping sensation. Another shop had already told him that he needed a new transmission.

For the rest of this story, read our latest R&R Tech feature here:

With only 85,000 miles, the customer’s complaint was an occasional slipping sensation.

09/08/2026

Here's a sneak peek 👀 at what's coming in the September issue of Transmission Digest. The issue is on its way to mailboxes now! 📬

08/28/2026

Joining us today on Powertrain Perspective is Bill Hanvey, president and CEO of the Auto Care Association.

Hanvey (who, as an aside, recently announced his upcoming retirement) discusses:

- The disruptions in the market;
- The impact of Extended Producer Responsibility, or EPR;
- What the association is doing to combat the technician shortage;
- The disappearing art of training transmission rebuilders;
- The keynote speakers and features of November’s AAPEX show.

08/26/2026

Today on TD we have what we hope will be the first in a series on shop management: Building a 300,000 Mile Shop:

Something you’ve been telling customers for years is finally happening. They’re keeping their cars. Related Articles - Aftermarket Transmission Kits: Supplier Listing and Kit Locators - Diffs and Curios: The Story of C&M Gear Works - The Role of Reman Transmissions Is Expanding Not because of an...

08/24/2026

A 2018 Chevy Truck Express 2500 with a 2.8L diesel powering an 8L90 transmission that would intermittently go to failsafe recently came into our shop. Sometimes this happened in second gear and other times it was eighth gear. It always had reverse.

For more, read our latest Shift Pointers column:

A 2018 Chevy Truck Express 2500 with a 2.8L diesel powering an 8L90 transmission that would intermittently go to failsafe recently came into the shop.

08/20/2026

With more drivers using vehicles that aren’t trucks for towing—specifically, the mid-sized SUV—comes more towing-related issues. In particular, using these vehicles to tow more than the vehicle can handle can lead to problems with the transmission and torque converter.

So if a customer comes in with a complaint related to this, it’s just as important to isolate the cause of the issue as to give the customer advice about how to keep it from coming back.

Learn more in our story:

With more drivers using vehicles that aren’t trucks for towing—specifically, the mid-sized SUV—come more towing-related issues.

08/17/2026

They have made programming Nissan vehicles very difficult. CVT programming is a completely different nightmare in comparison to the RE5R05A. Both take time and understanding to get it right. Here's our step by step guide:

We take you through each step of Nissan RE5R05A Transmission Programming, which can be confusing for those who don't know how to do it.

08/13/2026

In the latest edition of TASC Force Tips, we clear up the mystery in setting proper endplay for the 4L60/E transmission family. Read on here: https://bit.ly/4w7uja8