My j-type overdrive won't seem to engage at lower RPMs... When the motor
is cold and I flip the switch at 2700rpms the OD engages. Once the engine
is hot, I can't get OD before 3300 rpms. I flip the swtich but the OD
clutch slips (I guess - I can feel something going on but rpms don't drop)
until I flip the switch back again and continue sans OD. Basically means
that once the engine is hot I can't get OD except on the highway
This is a Volvo conversion... I have 90 weight gear oil in there. I hear
that various people who know a lot about this recommend 30 weight, but it
seems like that would make things worse - wouldn't the heavier oil create
higher pressure and result in earlier engagement?
For those with ODs, what is your experience? Is this normal behavior? Am
I looking for something that isn't going to happen?
Any help appreciated
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