GM 6L series no-movement conditions: Analysis and repair tips
I am certain that many have experienced a no-movement forward, no-reverse or abnormal pressure condition with a GM 6L series transmission, especially since they are one of the most popular unit families in shops today. So, let’s examine some conditions and causes along with a few diagnostic tips for troubleshooting. We’ll go through a few
Transmission stories to be thankful for
Transmission repair is all about solutions. Problems present themselves; repair professionals solve them. That’s why this Thanksgiving, we’re thankful for solutions. Here at TD, we pride ourselves on playing a role in getting transmission professionals the assistance they need, whether that’s technical info or just telling stories of industry successes. Here are five transmission stories,
An easier way to install the center support in GM transmissions
Whether you are working on a 6L45, 50, 80 or 90, installing the center support that houses the L/R and 2-6 Brake clutches into the case can at times be difficult. In the past, I would grab the inside of the assembly with my fingertips on the friction teeth of the 2-6 clutch pack. I’d
Keep an eye out for 6L80/90 defective oil pumps
The complaint After replacing the pump assembly in a 6L80/90 transmission with a new GM pump the vehicle returns with symptoms that would appear to be caused by a low fluid condition: it falls out of gear at a stop and has low line pressure. Upon further inspection the sump filter, which was also a
Biggest takeaways from the TCRA annual seminar
June 24 and 25 brought us the annual Torque Converter Rebuilders Association (TCRA) seminar, in which the organization meets to talk technical issues, vote on its board, and hold seminars. More coverage of this event is forthcoming in TD’s July issue, but in the meantime, here are some of the biggest takeaways from seminar day.
TransGo introduces Performance Valve Body Reprogramming Kit for GM 6L series
TransGo has introduced the Performance Valve Body Reprogramming Kit for the GM 6L series. The 6L80 Tow & Pro kit utilizes technology to rework the 2-6, 3-5-R and 4-5-6 clutch regulator and boost valves that the company says will produce quick, clean shifts with increased holding capacity. The kit is made up of drop-in installation parts. Additional
