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4x4 problem

chad551

Explorer Addict
Joined
January 31, 2007
Messages
1,469
Reaction score
5
City, State
St.Louis, MO
Year, Model & Trim Level
2002 Explorer Sport Trac
Anyone experience this? This was posted on another site, and my ST does the same thing.

i have an on going problem with the 4x4 system.
When i engage the 4x4 hi and i step on the gas i feel a bang, only in 4 hi?
Ford dealer where i purchased the truck has had it back 4 times for this problem.
they say that their tech line says that the truck is within proper specs.

Now this bang only happens in 4hi and only when i step on the gas. terrain doesnt matter rain, snow, dirt. I know that this HICCUP ( which is what the Service manger calls it) is not normal.
Any ideas on what could be causing this?

Chad
 






I'd first check the front driveshaft -- like the splines on the "slip" part, joints and CV. Check them for play and make sure the splines are well greased.

If the thats all good and the bang still bangs, then check the front axle for good backlash (which is the amount of rotational play the flange has) and the same for the front output flange of the transfer case.
 






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