Web1 Dec 2024 · Hi everyone. Is my understanding correct; in re. to a GM TH400 auto transmission, to set the shifts points under normal driving, adjustments are made with the modulator valve and to set the shifts points, most of the time higher under WOT, a governor recalibration kit is often used. WebThis kit gives you all the necessary hardware to make the modifications and adjustments to the transmission governor. Proper installation of this kit can great The store will not work correctly in the case when cookies are disabled. ... TH350/700R4 Governor Cover O-RingOne (1) TH400 Governor Cover GasketTwo (2) AxlesEight (8) E-Clips (3/32")Six ...
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Web22 Jul 2015 · My theory on governor operation The th400 govenor consists of primary and secondary weights and of course the valve inside the governor body and functions by centrifugal force and hydraulic ... #3 and #4 weights with Yellow and Orange springs in same order.. I set Vacuum Mod 6 turns out.. Normal accel shifts 1-2 10 mph... 2-3 22 mph.. ... Web3 Mar 2003 · Most manual valve bodies with a brake eliminate the modulator. On a Th400 line pressure goes through the roof with the modulator blocked. So the pressure pushes the convertor forward into the motor, causing thrust failure. That's why it's not a good idea to run a trans with no/low pressure to modulator. If you had a stock type valve body with a ... knit velour fabric
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Web1 Apr 2007 · Th400 upshift problems Regarding the history of the trans I purchased the rod a few years back. In the paperwork supplied with the car it said TH400 trans rebuilt heavy duty. Don't have clue what that entailed. It has a stamped tag on the side which says 086 in the middle and below it says 86-FMA and 58459. I think the rod was built about 1990. WebThe B&M Adjustable Vacuum Modulator (Part# 20244) comes pre-adjusted for ‘normal’ shift points, but it is fully adjustable (see below), allowing you to customize the shift points (within a range of 2-4 mph). This unit is designed for use with select applications, including GM TH400 and TH350 transmissions. Allows you to tailor shift points. Web2 Oct 2007 · These are two different mods. The 1-2 shift valve modification is to make the TH400 valve body a manual/auto or full manual setup. The governor is modded to allow … knit vest for women