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#3
07-28-2009, 05:29 AM
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Re: M40 adjustments
The factory CW code TH400 trans was the unit that was installed in the L78 cars and the Z28. Hi-shift point with the large can style modulator...the adjustment screw is sealed on these units with a glue/wax type product. I have never tried to loosen the factory fitting...the aftermarket small gold colored units have an internal adjustment screw. Just remove the hose and turn it in to restrict vacuum and create a later and firmer shift. There are shift kits available for the TH400, but the factory hi-perf unit is pretty good "as is".
wilma
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