|Originally posted by OldsFiero:|
Swapping the governer did not cause this. Governer feed is orficed in the accumulator cover ahead of the feed pipe. This prevents loss of drive oil pressure when the governer is exhausting the most(0 PSI-0 MPH). Lets fix the high line pressure problem first. Tee in a vacuum guage to the modulator line and put a 0-300 PSI guage on the line pressure tap. Pressure at idle should be 55-75 PSI and vacuum should be at least 13" hg in drive. At 1000 RPM with hose off mod, max line should be 155-185 PSI in drive. Make sure the modulator is not bent where it enters the trans case(common on boneyard units). The mod valve in the case could be stuck also. Correcting the high pressure will fix the rough shifts, but likely won't fix the nuetral condition. That will likely boil down to a leak in the input clutch.
The firm shifting is no longer a issue. With the 92 cutlass governor back in the trans I was able to adjust the modulator until I am happy with the way it shifts. The neutral condition when the car comes to a stop is the only issue. It does not always do this but mostly does. Another issue that may or may not be related is that I can feel it downshifting as I am slowing down. It kinda feels like downshifting with a manual transmission. I'm not sure if this is normal but I don't notice this in my other vehicles.
I am able to check the vaccuum with the trans in park and I have 18 HG at 1000 RPM. I need to get a T for the vac line in order to test in drive. Note to self: NEVER shift to drive with the vac line disconnected from the modulator!
[This message has been edited by carguy8t8 (edited 11-15-2013).]