DMcpherson
COAL SLAYER
- Joined
- Aug 2, 2006
- Messages
- 213
Im lost on this one. Hoping someone has had a similar issue and can offer a little advice.
I just got done overhauling a 48re in an 04. Didnt move when I got it so it was never road tested. Tore it apart and the thrust washer behind the sungear to the rear planet was disintegrated. Whole unit was full of metal, forward clutches were smoked.
Got it all back together, used a transtec high energy kit, sonnax second servo, sonnax accumulator, and a trango SK48re kit.
Trans works awesome under light, and heavy throttle. But mid-heavy throttle not so much. Its not as bad until it warms up. Definitely gets worse once its hot.
I noticed it first in 4th gear LU. try to accelerate and it would slip. Bad. No shudder, but slip.
Then tried third gear. Same thing.
Then tried manual second, and the same thing. Not as bad, but my window in second is much smaller.
I shut off the LU solenoid on the scanner and ran it and it seems to go fine, so I believe that its Lockup. I originally had a Billet single in it, and after talking to transgo they told me it had to be converter so I put a triple in it, and it did nothing. At all.
Then they told me the OD sprag had to be backwards. Checked. No.
Also line pressure in 4th LU is 180PSI. OD pressure in 4th LU is 180PSI, so I dont think its a pressure problem.
Now, the kicker is, if you take off from a slow roll and let it shift into third, then lockup, then fourth in lockup it wont slip. Once up to speed you can let out, cruise in lockup, try to accelerate and it just slips.
I have the valve body out right now. Im going to check for leakage at the switch valve and maybe order the updated sonnax switch valve.
Oh, and another note the customer said he was having an issue before the trans finally died and described the exact same thing, so I dont believe that it has anything to do with what I did. But who knows.
TIA for any thoughts on it.
I just got done overhauling a 48re in an 04. Didnt move when I got it so it was never road tested. Tore it apart and the thrust washer behind the sungear to the rear planet was disintegrated. Whole unit was full of metal, forward clutches were smoked.
Got it all back together, used a transtec high energy kit, sonnax second servo, sonnax accumulator, and a trango SK48re kit.
Trans works awesome under light, and heavy throttle. But mid-heavy throttle not so much. Its not as bad until it warms up. Definitely gets worse once its hot.
I noticed it first in 4th gear LU. try to accelerate and it would slip. Bad. No shudder, but slip.
Then tried third gear. Same thing.
Then tried manual second, and the same thing. Not as bad, but my window in second is much smaller.
I shut off the LU solenoid on the scanner and ran it and it seems to go fine, so I believe that its Lockup. I originally had a Billet single in it, and after talking to transgo they told me it had to be converter so I put a triple in it, and it did nothing. At all.
Then they told me the OD sprag had to be backwards. Checked. No.
Also line pressure in 4th LU is 180PSI. OD pressure in 4th LU is 180PSI, so I dont think its a pressure problem.
Now, the kicker is, if you take off from a slow roll and let it shift into third, then lockup, then fourth in lockup it wont slip. Once up to speed you can let out, cruise in lockup, try to accelerate and it just slips.
I have the valve body out right now. Im going to check for leakage at the switch valve and maybe order the updated sonnax switch valve.
Oh, and another note the customer said he was having an issue before the trans finally died and described the exact same thing, so I dont believe that it has anything to do with what I did. But who knows.
TIA for any thoughts on it.
