Hard shift into reverse.

[BOHICA1344]

I currently have a 2007 ST with a 4.0L V6. Recently I have noticed that when I place the vehicle in reverse there is a huge jolt throughout the entire truck. It's only done it a few times, and there are no problems during regular forward driving either upshifting or downshifting. Has anyone else had this problem? If so what was the issue? Thanks.

 

[calebg]

Finally someone has my same problem. Yes - mine does this too (07 4.0 XLT) - sorry, but I still do not know what causes it although it has been less and less recently. Please check your transmission lines by the radiator whenever it jolts - every time mine jolted those lines slipped out and dumped the trans. fluid everywhere causing more problems. I THINK it was because of an aftermarket radiator with bad/wrong connections. I now have a Ford radiator and have not had any problems with the lines.

QUESTION - when you crank it up, what do the RPM's do? I know that my engine revs high about 3 seconds after cranking and if I put it in reverse while it's reved high, it jolts.....Not sure what's causing it to rev high though. I have to wait until it dies down, then put in reverse.

Also I don't think it is coincidence that we both have 07 4.0's....first build/first gen issues maybe?

Hope this is even a little help... sorry for the long post.

 

[BOHICA1344]

It usually happens after I've been driving a while. And no there hasn't been a tranny fluid dump either. I'm just stumped at this point.

 

[Tech By Trade]

Lol, google 5r55w fix or check outhttp://www.fordservoboretransmissionfixsolution.com/history.html. Good Luck.

 

[BOHICA1344]

I clicked on the link and it appears that it's possibly for the 4.6L and not the 4.0L. Do they utilize the same tranny?

 

[Tech By Trade]

The 5R55W is the 5 speed transmission on the v6. The v8 uses the 6 speed.