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-   -   TH400 Vacuum Modulator (https://forums.off-road.com/jeep-full-sized/108250-th400-vacuum-modulator.html)

**DONOTDELETE** 02-19-2002 08:06 PM

TH400 Vacuum Modulator
 
I recently swapped a trans and case from a 78 Wagoneer to a 79 Cherokee. My problem is shifting, not real sure if it is a smoked trans, or the vacuum modulator is out of adjustment. Does anybody know if there is a common setting for the adjustment, or turning the screw in increases, or decreases shift points? The reason for the swap, the wagoneer had front lock-out hubs with 3.54 gears and a mile marker part-time kit in the case

Dreaming about always turning left.
Reality.....Wheelin my 79 Cherokee.

**DONOTDELETE** 03-25-2002 09:36 AM

Re: TH400 Vacuum Modulator
 
I Figured out the problem! I took the old vacuum Modulator off the old trans, and figured out that I had screwed up installing the new one. Much better now!


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