Professional automotive forum for discussion of system analysis, diagnosis, and repair of vehicle transmissions, transaxles, and drivetrains. This forum is for experienced automotive repair professionals only, membership required.
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| Allison rear extension housing 4WD 10/07/2025 in the Transmission Forum [Transmission: 03 GMC Sierra 2500 HD SLE 6.6L] Have this Allison that broke the rear extension housing. Customer wants trans replaced, but I may need to replace the rear housing in order not to get too beat up on the return core. anyone have any idea whe... | ||
| GM P0711 Service Practices (8L45, 8L90) 09/29/2025 in the Transmission Forum First, thanks to Robert Duncanson for this excellent post: It was my introduction to this ongoing issue on the GM 8 speed transmissions. It looks like my first related repair is coming fast. Here's the rub: Robert suspected that the inline connector was a... | ||
| 2020 spark trany -40 temp reading 09/08/2025 in the Transmission Forum have a p1790 code cannot do relearn as temp senser says -40 all time. where is temp sensor and can it be replaced without replacing valve body. first time i have seen one of these . car seems to drive ok . have done a complete reprograming of car . did no... | ||
| fluid level check 08/28/2025 in the Transmission Forum [Transmission: 12 Ford Explorer Limited 2.0L] This is the 6f35 transmission. I had to change a drive axle and lost some fluid. I know it lost about quart plus. I already dumped the pan. Lesson learned, I added a quart, I went to pull the fluid level plug... | ||
| Imapala with 2nd geneation TCM flaring on 4th 08/26/2025 in the Transmission Forum 2015 Chevy Impala LTZ 3.6L V6 DOHC FW This is the second time I've encountered a severe 4th gear flare on a vehicle with a second-generation transmission control module (TCM). The usual, time-consuming process of replacing the valve body and reprogramming... |
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