No forward gears, but revers works after loud clunk at nearly WOT.

[Sam Harris]

Hey folks, been busy lately and not much time for my favorite forum. I’ve been maintaining my ‘03 and trying to keep her healthy. So I just had a mishap. Taking off from a stop, probably 70-80% throttle, and I’m not sure if it was on the shift from 1-2, but believe so. Loud clunk, and now I have only reverse. Manually shifting into gears also doesn’t change this. Fluid is full, and still a little red. She’s due for a change. I have the Performabuilt level 3 transmission, and certainly didn’t expect to have a failure without some significantly higher horsepower. I have terrible internet right now, so doing a quick search I didn’t find a match to this issue but may have missed it. Apologies if so.

 

[ivin74]

Sounds like the tranny is gone, how long have you had that transmission? I've seen several videos from performabuilt and not sure I agree how they rebuild their transmissions. They don't upgrade all the components that are known to fail.
What is the warranty those guys offer?

 

[Sam Harris]

Yeah, I chatted with them a bit and he believes the forward sprag is failed. I’ll be pulling this one out, and packing it up to ship to PA. Good that I have my original here for a spare, but definitely not looking forward to doing the work. Sounds like the forward sprag is not a common failure point, but I don’t know if that is an upgraded component or not. Transmission is 2 years old and approximately 30k miles.

 

[OR VietVet]

@NickTransmissions, opinions?

 

[NickTransmissions]

Forward sprag or low roller one-way clutch. If you have no forward movement in manual low then low roller has failed (these dont go bad very often). If there's movement in manual low and 2, but not Drive then fwd sprag. Borg Warner makes both and a new one of each should have been installed.

Hey folks, been busy lately and not much time for my favorite forum. I’ve been maintaining my ‘03 and trying to keep her healthy. So I just had a mishap. Taking off from a stop, probably 70-80% throttle, and I’m not sure if it was on the shift from 1-2, but believe so. Loud clunk, and now I have only reverse. Manually shifting into gears also doesn’t change this. Fluid is full, and still a little red. She’s due for a change. I have the Performabuilt level 3 transmission, and certainly didn’t expect to have a failure without some significantly higher horsepower. I have terrible internet right now, so doing a quick search I didn’t find a match to this issue but may have missed it. Apologies if so.