I have a 2004 F-150 5.4 liter 4X4. It has just over 70,000 miles on it. My transmission shifts fine up until it gets ready to shift into overdrive then it slips and the engine rev's high. Once I downshift or turn overdrive off it returns to normal. If I drive with the overdrive off then it shifts fine. The engine light is not on, the transmission light is not on, nor is the overdrive light on to indicate a problem. Does anyone have any suggestions on this problem before I take it to the shop?

 

sounds like a cooked or broken od band.

 

agreed.... or the servo piston is torn.....

 

Yup,,I agree,,time for a rebuild!

Phil

 

sounds like could be the band is worn out. or the OD solenoid has failed which is a common occurrence. the new 4r75w the solenoids pulses the OD band for a soft lock up so you don't feel the slam or bump when it engages. the OD solenoid is easily removed if u drop the tranny pan. there is a small retainer with one bolt holding it in.

 

Same Thing happened to me. I needed a total rebuild but thankful dad has lots of friends in the repair bizz

 

Same thing happened to me. Judging by the amount of material I found in the filter, it was fairly obvious that it was an OD band failure, not a servo issue. Got a built 4R75E on the way from Troyer, should be arriving in about 12 days...

 

this happend to my 02' . your tranny is taking a dump! the sensors are not catching right and shifting right. i took it to the dealership and had them fix the problem. cost about 3 grand but i only paid the 100 dollar deductable. good luck man.

 

Confirmed that it was a snap ring broken in half

 

I had to do the same thing 2 months ago. It would slip and the engine would rev up if I went over 2000 rpms after 3rd gear. I was 400 miles from home and had to drive over mountains and i made it home some how. I drove the rpm gauge the whole way going up the mountain or I would lose speed winding out. I shifted down to 2 about 100 yards from the top almost didn't make it. It was over 100 degrees out and miserable. I had to rebuild my tranny. I suggest upgrading to the kevlar kit for about $800 more. It will make it a super duty tranny and endore more damage. My cost was $3,900

 

Good lord you guys end up paying a lot for a transmission!

By the way, and this just isn't my opinion, for a daily driven vehicle it isn't the best idea to use kevlar for anything. One of the design team members for these transmission has given out a lot of great info on how to build a nearly bulletproof version and shares my opinion on kevlar. Kevlar is actually bulletproof and is fine for an all out race transmission. The thing is that it's so darn hard that it slips easily and often. Slippage equals heat no matter how you look at it. Use it on something like an overdrive band and you are asking for trouble. The overdrive band applies against the reverse drum and I have seen many transmissions with kevlar bands that got the reverse drum so hot that it distorted.

The best materials to use are the newest style stock materials with the exception of the overdrive band which should be made of a high carbon material instead of paper.

Darrin

 

Its the Overdrive snap ring. They get brittle after time and heat and a small chunk will fall into the valve body and not let overdrive engage. If your mechanically inclined at all you can replace the snap ring for 3 dollars. Or pay a dealership 700 in labor to do it for you.

 

It isn't positively that though. That's a good idea for sure, but it's one of several possibilities. All of which are going to require at least partial disassembly of the transmission to get to.

Darrin

 

Yup, mine did the same about a year ago. It lasted a while periodically doing it till finally no o/d. I'd have someone rebuild the tranny at the same time, a little extra dough for piece of mind.

 

No, I agree, I was just going off of what happened to mine, and what my friend who works on Fords told me about the 4r75's. Maybe jumping the gun about stating that it "IS" the problem... But its a pretty good chance.