really really hard shifting!

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Apr 20, 2009 | 06:42 PM

DVSMP

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really really hard shifting!

Guys my i have a 1990 f350 4x4 auto tranny... and when it shifts from first to second.. it shifts hard as hell.. the whole damn truck lurches forward when it shifts... and from 2nd to 3rd its hard but not quite as hard.. is this normal? the tranny was rebuilt about a year and a half ago but i have no idea what kinda gears was put in.. any ideas? is this normal? (which i doubt) thanks in advance

Apr 20, 2009 | 06:44 PM

joe f350

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From: concord ca

is the the tranny an e4od

Apr 20, 2009 | 07:16 PM

DVSMP

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yea it is.

Apr 20, 2009 | 07:46 PM

starmilt

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From: Faibanks Ak.

Some of the slushbox fans will be here before long. I have seen post similar and seems like the filps was the culprit. If it doesn't have three pedals I'm pretty ignorant.

Apr 20, 2009 | 10:28 PM

rupejosh

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From: back in SE Iowa

it could have had the shift kit put in and some are pretty stiff shifting my brother inlaws is like that.

Apr 21, 2009 | 12:38 AM

trugertha

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From: canada bc okanogan

hows your speedo and odometer do they work if not maybe your speedo gear is stripped out also could be your rpm sensor if thats not working properly it won't shift right either

Apr 21, 2009 | 12:41 AM

EastTexasTruck

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From: Livingston, Texas

Mine is a C6 2WD and it does the same thing. I was told it has a shift kit in it. If you're new to the truck you'll get to learn when it's time to shift and ease off the throttle a bit to minimize the hard shift. Mine shifts hard into 3rd when it's cold but once it warms up the shift to 3rd is much smoother. Once again I had to learn when it's time to shift and ease off a bit. I hope it's normal...lol.

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Apr 21, 2009 | 12:21 PM

Lazy K

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Quote:

Originally Posted by starmilt

Some of the slushbox fans will be here before long. I have seen post similar and seems like the filps was the culprit. If it doesn't have three pedals I'm pretty ignorant.

May be not too far wrong. I am not an expert but the throttle position sensor may be faulty as above or it could be the Manual Lever Position Sensor.
Probably if you could read the codes it would tell you.
Someone else will maybe able to tell you how.