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...

 

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.

 

iv have the 2nd spring installed in mine from transgo... love it

 

Would that be the ORANGE spring ? What about both the ORANGE and Yellow springs, how firm would that be?

 

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

 

Adjust the bands before you tear into the valve body.


http://www.explorerforum.com/forums/...d.php?t=158160

 

Any One Else ?