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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| Older transmissons and servicing 04/10/2026 in the Transmission Forum Im definitely not a transmission expert, but I could use the wisdom of some here. I have an 07 avalanche (4L60)with 270KM on the clock, I dont think the transmission has ever been serviced, it is getting dark and has a very slight smell, but not obviously... | ||
| Tran Flush Product? Good, bad, or worthless? 04/08/2026 in the Transmission Forum I was of the thinking a flush with a flush product would be good for it. Others suggest drain fill, drive, and repeat a few times, so that things aren't dislodged and lodged somewhere else. What's your experience over the years with it? | ||
| Lubegard Synergol TMS & XLE 04/03/2026 in the Transmission Forum The Synergol TMS speeds up the shift times. The XLE wax esther cools by reducing the friction. There is little word about these products, but there is nothing negative about them either, and they've been around for awhile. I put the XLE in my own motor oi... | ||
| truck won't move when temp is 5 below or colder 03/26/2026 in the Transmission Forum [Transmission: 09 GMC Sierra 3500 HD SLT 6.6L] This truck is not normally driven in the winter. Customer says when he starts it up after sitting in sub zero weather for several weeks it starts ok but won't move until it has been running for several minut... | ||
| Driveshaft yoke leak 03/19/2026 in the Transmission Forum [Transmission: 21 Chevrolet Silverado 2500 HD High Country 6.6L] Transmission model 10L1000 10 speed...Truck has a leak around the rear transmission seal area, it is leaking from the center hole of the driveshaft yoke metal plug. I see where GM has issue... |
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