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Turbo 400 govornor adjustment..

Posted: Sat Jul 04, 2015 11:52 pm
by pitts64
If I change the weights to the governor in my th400, will it change the part throttle shift points?

My trans doesn't shift soon enough with the electric kick down connected.. I'm looking for it to shift between 5000 to 5600 full throttle with no change to the part throttle shifts..

Thank you...

Re: Turbo 400 govornor adjustment..

Posted: Sun Jul 05, 2015 12:08 am
by Alan Roehrich
Yes, it will. The governor controls shift points, period. If you raise the shift point with the governor (the only way to raise it appreciably) you raise it at all throttle settings. If your WOT shift points are too low, but part throttle is fine, then you do not have enough line pressure rise.

Re: Turbo 400 govornor adjustment..

Posted: Sun Jul 05, 2015 9:02 am
by pitts64
The full throttle shift points are too high with the solenoid connected... Is it still a line pressure issue?

Thank you..

Re: Turbo 400 govornor adjustment..

Posted: Sun Jul 05, 2015 12:53 pm
by Alan Roehrich
It is probably a calibration problem. Isn't this the unit you posted about that has a Trans-Go kit in it? If so, try a Superior kit, possibly you may need a different valve body and a new separator plate to do that.

Re: Turbo 400 govornor adjustment..

Posted: Sun Jul 05, 2015 1:12 pm
by pitts64
Yes, it has the Trans Go kit... I look into the Superior kit..

Re: Turbo 400 govornor adjustment..

Posted: Sun Jul 05, 2015 1:37 pm
by Alan Roehrich
One thing you must remember. A valve body and the associated valves, AKA the modulator and valve, and the governor and valve, together form a rather basic hydraulic "computer". As such, the WOT shift points and the part throttle shift points will always be proportional. So, for example, you cannot have the relatively high RPM part throttle shift points of a Corvette or Camaro LT-1 calibrated TH400 at part throttle, and then have the relatively low RPM shift points of a C-10 350 4 barrel calibrated TH400 at WOT.

Also, with an "automatic" (not full manual aftermarket) valve body, you do not want to disable the throttle input, the detent solenoid on a TH400, or the detent cable on a TH350. If you do, you eliminate the line pressure rise and lube increase at WOT. You risk slippage and poor shift quality, as well as failures of hard parts (planetaries, sprags, bushings, etc) related to lack of lube flow.

Re: Turbo 400 govornor adjustment..

Posted: Sun Jul 05, 2015 6:04 pm
by pitts64
I always thought my car ran slightly harder with the electric solenoid connected.. The builder said it didn't matter if the electric was connected or not due to modifications he made...

Re: Turbo 400 govornor adjustment..

Posted: Mon Jul 06, 2015 8:31 am
by pitts64
Here is the link to some of the modifications done, dual feel mod was one of them..

Jake did NOT build this transmission for me..

http://www.jakesperformance.com/TH400_Rebuild_Tech.html