2003 Eddie Bauer (81K) 6 cyl 4x4

[ggw76]

Just had transmission rebuilt. All works fine except hard "clunk" when manually shifting from reverse to drive. Drive train and rear seem ok. Any suggestion what to look for next? Thanks.

 

[Gilligan]

Who rebuilt it? I'd take it back for a warrenty repair.

 

[Mbrooks420]

I agree. Take it back ASAP, and get it known there is an issue.

 

[ggw76]

Took back. Shop replaced the solenoid pack again after the rebuild. Also found a short in the wiring from the computer and fixed (internal pressure was intermittently increasing). Put back together. Still bangs too hard while manually shifting from park to drive or back again but not all the time. Seems ok when first starting but gets worse when the engine/tranny warms up. Shop is disconnecting the drive shaft today to see if the hard shift is still present. Otherwise, ran well when shifting automatically. The shop is continuing to look at issues (ie second bad solenoid block). Any ideas? Thanks.

 

[imp]

Took back. Shop replaced the solenoid pack again after the rebuild. Also found a short in the wiring from the computer and fixed (internal pressure was intermittently increasing). Put back together. Still bangs too hard while manually shifting from park to drive or back again but not all the time. Seems ok when first starting but gets worse when the engine/tranny warms up. Shop is disconnecting the drive shaft today to see if the hard shift is still present. Otherwise, ran well when shifting automatically. The shop is continuing to look at issues (ie second bad solenoid block). Any ideas? Thanks.

Have the shop measure line pressure at idle and see if it bumps upward upon initial engagement. There are specs published on this (somewhere), and if pressure surges higher just upon engagement, a harsh engagement is felt. This is all controlled by the solenoid module. imp

 

[ggw76]

The shop is now replacing the computer that governs the voltage draw because it is too high which was increasing the shift pressure. Said if that's not it the shop will pay for it. Very fair.

 

[imp]

The shop is now replacing the computer that governs the voltage draw because it is too high which was increasing the shift pressure. Said if that's not it the shop will pay for it. Very fair.

@ggw76
That IS fair. There are 3 Pressure Control Solenoids, A, B, & C. The computer varies the current to all 3. A tricky procedure is used to verify output pressure from A or B by turning off either one while verifying pressure from the other. The second pressure tap is used to verify output pressure from the C solenoid. The acceptable pressure levels at engine idle, for solenoid C are 0-15 psi in P or N, 90-120 psi in R, and 0-15 psi in D, 3, 2, or 1. imp

 

[ggw76]

Wanted to finish on this. The new computer and software download seems to be the fix. Running great now. The mechanic would not give up and was very fair. Thanks for all the help.

 

[imp]

Wanted to finish on this. The new computer and software download seems to be the fix. Running great now. The mechanic would not give up and was very fair. Thanks for all the help.

@ggw76
Thanks for updating. It is always refreshing to learn that one having problems appreciates efforts of others, as you show you do. Thanks for that, also! imp

 

[ggw76]

On a related issue, talked to the tranny guy about the second key not working (would not turn over). Since the computer was changed, the keys need to be reprogrammed. The one with the vehicle was done...now have to do the other. Shop said he would take care of it. Thanks again.