Transmission slip? not sure - Ranger-Forums - The Ultimate Ford Ranger Resource

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Old 05-18-2010
Thread Starter
Join Date: Feb 2010
Location: Palatka,FL
Posts: 33
Transmission slip? not sure

I have a 2003 Ford Ranger Edge FX2 4.0 Auto. Just changed the engine and as soon as i have it running the transmission seems to be slipping, I think. It shifts fine but when i get around 40mph, 2000rpm it seens to be slipping. i can give it gas and it will smooth out until the engine itdels back to around 2000rpm driving.If I take off fast or floor it it shifts through all the gears fine.just does it on a normal smooth drive.
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Old 05-18-2010
Ford04Ranger4.0's Avatar
Join Date: Dec 2008
Location: Plattsburgh, New York
Posts: 3,390
Does the tran fluid smell burnt?
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Old 05-22-2010
Thread Starter
Join Date: Feb 2010
Location: Palatka,FL
Posts: 33
no it doesnt smell burnt
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Old 05-26-2010
RangerSP's Avatar
Join Date: May 2010
Location: FL
Posts: 5
You probably need to change the filter and put some fresh fluid in. Maybe add some conditioner or some transmedic.
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Old 05-27-2010
Blhde's Avatar
Join Date: Oct 2005
Location: Northern IL
Posts: 2,804
It sounds like the converter is unlocking on you. This would be a pressure issue. I say change the filter too.

If you have some skill, time and extra cash. I would install a shift kit. I hate that soft stock shift, it just creates heat and wear.
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