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-   -   Turbo 400 shifting weird (http://www.hotrodders.com/forum/turbo-400-shifting-weird-231435.html)

ryan v 04-02-2013 09:02 PM

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.

vinniekq2 04-03-2013 09:49 AM

describe weird?

ryan v 04-03-2013 07:05 PM

its seems like it has to rev up more than it should to shift

vinniekq2 04-03-2013 07:16 PM

check vacuum source and modulator

ryan v 04-03-2013 08:03 PM

that's what I was thinking might be the problem. do they make an adjustable modulator?

zardiw 04-04-2013 10:10 PM

Quote:

Originally Posted by ryan v (Post 1662977)
that's what I was thinking might be the problem. do they make an adjustable modulator?


Yup.............z

rick 427 04-05-2013 11:06 AM

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.

ryan v 04-07-2013 10:07 PM

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?


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