awilli6

Would too much ATF cause the tranny to shift hard?

skpyle

I don't think so.
Check the adjustment of the Bowden cable, should be adjusted so that the coupler drops right onto the ball on the bellcrank without any tension.
Next look at the vacuum line going to the vacuum modulator on the side of the transmission casing. Low/no vacuum here will cause hard shifting. If you have a vacuum gauge of some form, see what vacuum is on that line with the engine idling warm. Should be at or above 18 in/hg. If not, start tracing that line along the torque tube and up to the V of the engine.

Good Luck!

awilli6

Thanks for info. I’ll check vacuum line. I was working on vacuum lines to get AC to blow colder. Especially the line connected to heater valve. I think the tranny line connect at that T.

Jason89s4

The vacuum line from the tranny makes it way up to the front along the torque tube tunnel, and arrives in the engine bay near the top of the bellhousing, and joins a "tee", but it probably will be four or five-way.
It is in the vicinity of heater control valve, but will not share a "tee" with it.
There should be a dedicated hard white vacuum line that makes it way from inside where your A/C controls are, all the way to your heater control valve.
Check out this article for great description of A/C-related vacuum lines w/ pictures (click on "vacuum actuators" link):
https://members.rennlist.com/pirtle/svc.html

-Jason

awilli6

Fixed it. While getting vacuum line correct for HVAC, I disconnected one of the line to fuel regulator. I’m assuming this caused the tranny to be unable to maintain pressure. Shifting like butter now! Thanks guys

skpyle

Very good!

Tlwev

Could someone send a pic or describe the adjustment location of the Bowden cable?

NoVector

This whole thread is good, but I followed Greg's instructions at post #10. https://rennlist.com/forums/928-foru...l#post10498854