4R55E Shift Kit Upgrade - Ranger-Forums - The Ultimate Ford Ranger Resource


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Old 08-05-2007
GearBoxKevin's Avatar
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4R55E Shift Kit Upgrade

Is anyone using or herd of anyone using a SONNAX shif kit for a 4R55E.

At 60,000 miles I took my truck in for a trans service, they put a Transgo shift kit in my 4R55E. I felt a little difference but not much. Well now at 101,650 miles the trans is giving me more problems even after a full service.. (every 15K).... I found a company "SONNAX" that sells a better looking kit that comes with redesigned control valves and springs. Iam trying to see if anyone know any thing about that company befor I buy...
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Old 08-05-2007
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When they put the trans go in, im assuming the put in the stock springs for shift feel.


I installed the second stage spring from the kit, the trans shifted very firm. To the point where some would complain/ask about it.


I think you should try adjusting ther bands first.
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Old 08-06-2007
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iv have the 2nd spring installed in mine from transgo... love it
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Old 08-11-2007
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Would that be the ORANGE spring ? What about both the ORANGE and Yellow springs, how firm would that be?
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Old 08-13-2007
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There is a REALLY good thread on shift kit/valve body mods on the Explorer Ranger Enthusiasts forum to check out:

http://www.explorerforum.com/forums/...d.php?t=140987
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Old 08-13-2007
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Quote:
Originally Posted by GearBoxKevin
Would that be the ORANGE spring ? What about both the ORANGE and Yellow springs, how firm would that be?

Adjust the bands before you tear into the valve body.


http://www.explorerforum.com/forums/...d.php?t=158160
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Old 08-22-2007
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Any One Else ?
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