P0734 Trouble Code

[SDenny61]

Have a 2000 Ranger with the 5R55E. 3 Days ago tranny started dropping into what seemed to be "N" while driving down the road. Had codes pulled today and got P0734 which indicates a improper gear ratio in 4th gear. I also lost reverse as well. When I put truck into OD it feels like it shifts into gear for a moment and then back out. When going to R it will actually move the truck a foot or so before it goes wherever it goes. The tranny was just recently rebuilt to fix a 2-3 flare and fix a broken R band. The VB was replaced with a Phoenix reman, the torque converter was rebuilt, and all the clutch packs are brand new with new seals and gaskets, a new filter and all new Mercron V... It has less then 5,000 miles on the rebuild, about 2 1/2 months ago. HELP!! what happend and what can I do to fix it? Thanks!

Steve




Remember 9.11.2001

 

[BrooklynBay]

You might have a warranty on it. Could you go back to the place where you had it rebuilt, or did you rebuild it yourself? Did you check the pressure with a 0-300 PSI gauge? Maybe you might have blown one of your valve body gaskets. Did the rebuilt valve body come with new solenoids? Maybe your EPC solenoid is bad.

 

[SDenny61]

THe VB had all new solenoids as well as a new gasket. I was unable to get ahold of the shop that did the rebuild to see what kind of warranty I have on it. I am attempting to find a pressure gauge that I can put on the tranny. I'll keep everyone posted as to the results.
On another note, I thought everyone might find this interesting. The R band was broken. The tab that the servo pushes against broke off and popped a hole through the tranny case. I found this interesting.

Thanks and have a good day.

 

[BrooklynBay]

I don't know how that is possible. That would require an incredible amount of pressure.

 

[Glacier991]

whoa..... that IS incredible. Time for a new case

 

[BrooklynBay]

Could you post a picture of that?

 

[SDenny61]

I'm working on a picture. Hopefully i'll have it by this weekend. The hole in the case was in a non important area and was easily repaired at a speciality welding shop. They did an incredible job, I can't really tell where the repair is. Thanks all!

Steve