Re: R-9 Overdrive

Posted by Tom in KCMO On 2014/4/7 11:19:20

I can't think of any way that the R9 overdrive output shaft would become stuck on the overrunning clutch assembly as it just slides over the rollers....unless maybe the rollers have somehow worn a grove into the bell of the output shaft (?).

If the lockout lever is moving by itself as you pull rearwards on the overdrive housing then my guess is that the lockout ring is hanging up somewhere, either on the overrunning clutch splines, the ring gear splines (forward of the overrunning clutch) or possibly either the reverse lockout plunger or the other, wider, plunger that interlocks with the solenoid pawl.

The reverse plunger should slide out of the overdrive housing as the housing is pulled from the transmission. If the reverse plunger is somehow stuck in the overdrive housing (stuck in the lockout collar shifting fork) it could 'hook' on the planetary gear and keep the housing from pulling free. This doesn't seem likely though.

Have you tried re-installing the tail piece on the output shaft, putting the car in gear and gently twisting back and forth with a wrench? This might help work any stuck splines loose. Alternatively you could try a slide hammer, though that might be a last resort option.