Ok thanks. Maybe I'll flip mine around. My 1-2 part throttle shift is getting a little sloppy with age and miles. It also sometimes sticks in second instead of downshifting all the way to first when coming to a stop.

 

Check your 1-2 accumulator piston. If its plastic its possible that its cracked and this could be your problem. What happens is you have main line pressure on one side of the piston in first gear. On the other side of this piston is where 2nd gear acc. oil will be in 2nd gear. In first gear if oil pressure is on the 2nd gear side it will apply the band. Not saying this is your issue but it is certainly something I would check. If you have a plastic piston upgrade to an aluminum one or a pinless sonnax piston. HTH Vince

 

Thanks for the info. I'll check it this weekend. This transmission is stock so far because it's my wife's daily driver Yukon. Quickly approaching 160k miles too.

 

hey yall servo came in today im gonna swap it in the a.m. is there any more info on the flipping of the 4th gear piston i read in the above sticky it says put it on the same way it came of does this apply when flipping it

 

Not sure. But take pictures of what it looks like when you pull it out to reference when you are reassembling. Also make SURE the snap ring is fully seated before driving anywhere.

 

10-4 if anyone has any info on this 4 piston flip please chime in I'll be doing this in about 5hours so any info will help

 

Its pretty straight forward to do. Just flip it if you feel you need to tighten up the band. Keep in mind this is a way to tighten up the band when its loose! Its not always needed but I will say that I do this more times than not.

 

Ok she's all done shifts nice hopefully flipping that 4th piston doesn't hurt anything

 

Nice! You move much faster than many of the members when it comes to buying stuff then actually installing it, myself included

 

haha ya i like to get things done im a car freak haha if it makes it perform better im all over it