[j cAT]

Originally Posted by Ol'Jim

Apologies for some duplication, if one of my posts has to be deleted, I'd rather it be this one, but this is a truck trans, but we just installed it in a 1970 Chevelle. So I did post in Classics, but I have updated that thread more than this one. Was hoping to reach someone in either forum that can offer advice.

It is a Rebuilt trans, but it sat for 5 years in dry storage. Stock valve body. Will not shift into 2nd or 3rd, stays in low even up to 4500 RPM. Replaced Vacuum Modulator, still same. With shifter in low gear, will stay in low, even on deceleration. In 2nd or Drive, will freewheel when you let off the gas.
Has manifold vacuum at modulator.
I have to leave for the airport in 2 hours, really would appreciate any help or advice.
Guessing I will go check the governor first, then drain fluid and drop the pan, and look around at the valve body.
Hoping for some help on what to look for.
Thanks a bunch, -Jim.

check that the detent cable is not stuck