My J-Type overdrive has been playing around recently. When the gearbox was cold everything would be fine, the overdrive functioned correctly and there was no hesitation either engaging or disengaging. However, after 10-15 minutes, disengaging would be hesitant and would sometimes re-engage before disengaging correctly.
On my last trip it did not disengage at all, and I had overdrive in all forward gears (and presumably reverse, although I was careful not to even try).
Having left the car overnight it appears that it is working again, although I was only brave enough to try it with the rear wheels off the ground.
I had already drained the gearbox oil and refilled it with Penrite GB40 gearbox oil prior to the final run.
I've read that it can be the solenoid that could be at fault and am looking for a second opinion as I'm not a gearbox expert (but will have to become one as I now live in France).
Also, looking at the drivetrain, I would assume that the unidirectional clutch would be ruined even if I try pushing the car backwards with the gearbox in neutral as the propshaft, and therefore overdrive, would still be rotating. Can someone confirm or deny?
Thanks you all for reading this long email, but I wanted to be as descriptive as possible.
Cheers, Robert
On my last trip it did not disengage at all, and I had overdrive in all forward gears (and presumably reverse, although I was careful not to even try).
Having left the car overnight it appears that it is working again, although I was only brave enough to try it with the rear wheels off the ground.
I had already drained the gearbox oil and refilled it with Penrite GB40 gearbox oil prior to the final run.
I've read that it can be the solenoid that could be at fault and am looking for a second opinion as I'm not a gearbox expert (but will have to become one as I now live in France).
Also, looking at the drivetrain, I would assume that the unidirectional clutch would be ruined even if I try pushing the car backwards with the gearbox in neutral as the propshaft, and therefore overdrive, would still be rotating. Can someone confirm or deny?
Thanks you all for reading this long email, but I wanted to be as descriptive as possible.
Cheers, Robert