th400 help

Old 07-15-2008, 09:03 PM
  #1  
blowenbig
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Default th400 help

i just put in b&m forward manual valve body in th400 when shifts it is at 7000 rpm it doesnt shift all the time it has a mind of its own when it does shift has soon has you let of from the throttle it shifts dwn to 2 gear its like its stuck in 1st gear it wont do any thing intill in its around 7000 rpm then it will jump to 2 then drive at has soon has you let of it jumps to 2 then 1 gear with out moving the shifter i have a 3500 stall and a 515 bbc
thanks
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Old 07-16-2008, 08:14 PM
  #2  
SST4530
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Did you install the plug in place of the vaccum modulator valve? If so try puttin the modulator back but don't connect the vaccum line. Let me know what happens. :?
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Old 07-17-2008, 05:04 AM
  #3  
us7race
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How was it acting before the manual valve install? If it was acting fine then I'd be calling the manufacture of the valvebody to see what they have to say..They I would think have seen this happen before.
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