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Hot Rod Forum : Hotrodders Bulletin Board > Tech Help> Transmission - Rearend> Turbo 400 shifting weird
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Topic Review (Newest First)
04-07-2013 10:07 PM
ryan v well I don't think my engine will pull that much vacuum. so i'm just gonna have to live with it unless I put a manual valve body in it?
04-05-2013 11:06 AM
rick 427 Adjustable modulator or not,you need a min. of 17-18 in. of vacuum at the modulator in order for that trans to shift right.
04-04-2013 10:10 PM
Originally Posted by ryan v View Post
that's what I was thinking might be the problem. do they make an adjustable modulator?

04-03-2013 08:03 PM
ryan v that's what I was thinking might be the problem. do they make an adjustable modulator?
04-03-2013 07:16 PM
vinniekq2 check vacuum source and modulator
04-03-2013 07:05 PM
ryan v its seems like it has to rev up more than it should to shift
04-03-2013 09:49 AM
vinniekq2 describe weird?
04-02-2013 09:02 PM
ryan v
Turbo 400 shifting weird

I've got a 87 chevy 4x4 with a mild small block in it. Ever since I put this engine in my transmission has shifted weird. Would the lower vacuum pull of this motor cause this problem? It was a tbi motor but I swapped it to a carbed setup.

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