1996 E150 tranny question

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Aug 19, 2011 | 07:43 AM

Geardriven77

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From: Lynchburg, VA

1996 E150 tranny question

What would cause an otherwise proper shifting auto transmission to start shifting hard? I have to run out 1st and accelerate until it finally clunks into 2nd. My first thought was a lack of fluid but that usually causes slipping. Fluid level appears to be full.
Thanks!

Aug 19, 2011 | 09:15 AM

ctubutis

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Moved here from 80-86.

Aug 19, 2011 | 09:20 AM

Lazy K

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What engine and transmission is it?

Aug 19, 2011 | 11:35 AM

Geardriven77

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From: Lynchburg, VA

Engine is a 4.9L
I think the tranny is a C6 but not sure

Aug 19, 2011 | 11:38 AM

Conanski

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Quote:

Originally Posted by Geardriven77

I think the tranny is a C6 but not sure

In a '96... very unlikely, it's either the E4OD or 4R70w.. both of which are COMPLETELY computer controlled.. so that's where you start by pulling the codes.

Aug 19, 2011 | 01:18 PM

Lazy K

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If it is a C6 it will have 17 pan bolts and your problem would be either the vacuum modulator at the trans is bad or the vacuum pipe to it is disconnected/bad.