jdtech

got an 08 silverado wont shift into 2nd or 4th manually or auto checked the end play on the servo didnt move much no more then an 1/8 but i didnt pull the cap and remove oring should i remove then try it. im stuck i have read most of the post thats y i tried the servo first is it time to rebuild??? im new to the world of these things so any help would b great and thanks in advance

mrvedit

You say it "won't shift into 2nd or 4th manually"; does it shift automatically?
Please describe exactly what happens when you start in [OD] and accelerate.

Glad you have read the related threads and have already checked the servo end play.
How many miles on the truck?
I suspect the servo is relatively easy to remove on your truck (not on a F-body) and replacing the seals would be my next step. With 1/8" end play your band should be fine, and so far this does not sound like the trans needs a rebuild.

I can't find my posts on how to remove the servo right now, but the basic steps are:
1. Hit the cover with a mallet to loosen it. (You probably already did this to measure end play)
2. Remove the large wire ring holding the cover
3. Pull out on the cover until the blue o-ring is visible.
4. Grab the blue o-ring and cut it with wire cutters.
5. Pull out the blue o-ring.
6. The entire servo comes out easily then.

jdtech

it wont shift into second or forth at all try manual was to make sure that it wasnt when i manually put it n second it just revs and goes to third fine but wont even try to go to fourth when u shift to drive it stays in third there is 208xxx on the truck

jdtech

i have watched how to remove someone had posted it n another thread but should i get the orings and stuff first???? just in case i tear one or something or should i get the one the has springs and all with the extender??? oil looks ok and smells ok (dont smell burnt) is an 08 silverado

mrvedit

OK, it is clear your band is not engaging. I assume you have Reverse. (This ensures your sun shell is OK; 2003+ sun shell failures are very rare.)

The o-ring and seal kit for a servo is very cheap; maybe $15.
If you are sure about the end play, skip the extender. Also extenders can fail, it is better to get a long pin, either Sonnax or GM.

jdtech

yes i have reverse ok ill see if i can find a seal kit then will go from there at that point i can check end play better without oring on the cap.

LS1GMCTruck

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Please keep us updated jdtech.