Vette servo problem

[2000Yukon]

So I installed my servo no problems. But when I drove it, it didn't shift into 4. Help please!

 

[BOSS]

How many miles on the hoe? There are sometimes issues with installing the servos on high mile trannys. The reason is you are only installing a single high performance part in a stock tranny. The pressures change, the dynamic change etc...so you risk breaking a high wear piece like a clutch pack, valve solenoid..Any codes?

Also, the 3/4 clutch pack is really a weak point on this 4l60e, and as you can imagine it's used much more than 1/2.

B

 

[2000Yukon]

How many miles on the hoe? There are sometimes issues with installing the servos on high mile trannys. The reason is you are only installing a single high performance part in a stock tranny. The pressures change, the dynamic change etc...so you risk breaking a high wear piece like a clutch pack, valve solenoid..Any codes?

Also, the 3/4 clutch pack is really a weak point on this 4l60e, and as you can imagine it's used much more than 1/2.

B

I just rolled over 98xxx.

 

[Nickleahy23]

you messed up a teflon ring on the servo..i did the same thing and didnt have 2nd..pull it back out and make sure those split rings are on there good..simple fix

 

[BOSS]

I just rolled over 98xxx.

That's not considered danger zone from everything I've read, it's generally over 100k but you are damn close.

Does it catch at all into 4?

B

 

[2000Yukon]

you messed up a teflon ring on the servo..i did the same thing and didnt have 2nd..pull it back out and make sure those split rings are on there good..simple fix

Thanks. I hope that's it and not a clutch.

 

[BOSS]

you messed up a teflon ring on the servo..i did the same thing and didnt have 2nd..pull it back out and make sure those split rings are on there good..simple fix

cool, I was gunna say reinstall it from start to finish as well. I have no practical experience putting them in so I haven't a clue what steps are done to be truthful but it would seem reasonable that you might mess up the install on the first try. I know I would...


B

 

[2000Yukon]

Well I'm gonna let it cool and reinstall it and Ill post how it is after that. Keepin my fingers crossed.

 

[BOSS]

Thanks. I hope that's it and not a clutch.

I guess I need to do some research, if it goes into 3 I would think there isn't a problem with the 3/4 clutch pack. I'll check up on it while you reinstall your kit, definitely peaked my interest.



B

 

[2000Yukon]

I guess I need to do some research, if it goes into 3 I would think there isn't a problem with the 3/4 clutch pack. I'll check up on it while you reinstall your kit, definitely peaked my interest.



B

Thanks a bunch

 

[BOSS]

you messed up a teflon ring on the servo..i did the same thing and didnt have 2nd..pull it back out and make sure those split rings are on there good..simple fix

That could mean the pressure is lost correct? If the pressure is lost then that might explain slippage and no shift.

 

[2000Yukon]

Just reinstalled it and i think the trannys ******, and I don't have the money to have it rebuilt. FML

 

[BOSS]

Just reinstalled it and i think the trannys ******, and I don't have the money to have it rebuilt. FML

Damn. That sucks, that's the 3rd one on this board that I can remember who had a tranny fail becuase of a servo install.

I found something that might be worth looking into:
"Have you checked - replaced the check ball capsule in the servo area?"

"Also, some people take the checkball capsule out of the case, this is located in the servo area, if you did this it must be plugged off as this will cause a massive leak in that circut."

http://www.hotrodders.com/forum/4l60e-problem-131056.html

B

 

[2000Yukon]

Damn. That sucks, that's the 3rd one on this board that I can remember who had a tranny fail becuase of a servo install.

I found something that might be worth looking into:
"Have you checked - replaced the check ball capsule in the servo area?"

"Also, some people take the checkball capsule out of the case, this is located in the servo area, if you did this it must be plugged off as this will cause a massive leak in that circut."

http://www.hotrodders.com/forum/4l60e-problem-131056.html

B

Thanks for all the help. I'm gonna have a friends dad that has an automotive repair shop look at it also.

 

[yooformula]

damm that sounds just like what I have going on with mine. I hope its a simple fix with the oring.

 

[yooformula]

just a tip, if it shifts from 1-3, technically 4th should work. I had the exact same problem and turned out the 3rd gear apply piston was installed backwards. As soon as I fixed it the tranny shifted fine and my miss-fire codes all stopped.

 

[2000Yukon]

Well I took it to a tranny shop and I forgot to put the overdrive plate on the servo. Man I feel like a dumb ass.

 

[Justinj360]

Old thread, I know. But which one is the overdrive plate? The outermost one for 4th gear?