4t65e cause of failure
Hi! I'm about to rebuild my second transmission; the first one was a 700r4.
I recently bought a 2008 Chevy Impala with the 3.5L. It's in very good condition, but the transmission is bad. There is nothing in drive, but it moves forward when I put it in first speed. I can go to the second or third speed if I put the lever to the first speed and manually change it to the second and third. I can't start from the second or third speed. The reverse works perfectly, and I don't have any check engine lights related to the transmission. I'm probably going to do a full rebuild, i.e., seals, clutches, bands, pistons, bushings, solenoids, a TransGo AFL valve repair kit, and a shift kit.
I'm going to remove the transmission from the car today, and I was wondering if anyone knows what could be the problem with this transmission. I'm thinking of fluid leakage in the VB, but I want others' advice to be sure to find the problem and not just put in a bunch of new components and hope. From the ATSG, I don't see any difference in the clutch engagement when the car is in 1st, 2nd, or drive, but the car acts differently.
Thanks for you help! :)