Like I said, it's an electronic throttle, and that behavior is not normal. The only "governor" in the system is a RPM limiter (set around 5400) and speed limiter (set around 98). The WOT shift points are around 5000 or so. All electronically controlled.

You sure about that?

 

glc, FYI, May 18, 2007

To: All Ford, Lincoln and Mercury Dealerships
Subject: MERCON Automatic Transmission Fluid To Be Discontinued

BACKGROUND
Effective July 1, 2007, the production and licensing of MERCON Automatic Transmission Fluid will cease. These actions are not exclusive to Motorcraft and affect all producers of MERCON. MERCON V provides significant performance improvements over MERCON especially with transmission shift performance at low temperatures and anti-shudder.

SERVICING FORMER MERCON APPLICATIONS

Automatic Transmission, Power Steering Systems and Manual Transmissions previously requiring MERCON must now be serviced with MERCON V
Transfer Case Systems previously calling for MERCON must now be serviced using Transfer Case Fluid, part number XL-12, specification # ESP-M2C166-H (release and TSB pending). Power steering systems listed in TSB 07-1-7 can continue to be service with Premium Power Steering Fluid, XL-9 or F7AZ-3F823-BA (specification # WSA-M2C195-A).
Ford does not recommend the use of any products that do not meet the above specifications or ATFs that claim to be the equivalent of MERCON or being acceptable for these applications.
PART NUMBERS TO BE OBSOLETED

XT-2-QDX MERCON Quart bottles
XT-2-DDX MERCON 55 Gallon Drums
XT-2-TDX MERCON Totes
XT-2-BDX MERCON Bulk
NEW PART NUMBER RELEASED EFFECTIVE AUGUST 1, 2007

XL-12, Motorcraft Transfer Case Fluid Quart is scheduled for release August 1, 2007.
Please see your Motorcraft Ford Authorized Distributor or Bulk Oil Distributor for availability
PART NUMBERS NOT AFFECTED BY THESE CHANGES

XL-9 Power Steering Fluid
F7AZ-3F823-BA Power Steering Fluid

http://safeshare.tv/w/obrWTZEMgF

 

CODES??? If the truck works correctly in 2 wheel drive, then its a transfer case inner problem or a front differential problem. If it only looses power in 4WD, That my take on it! FYI Transfer fluid!

 

Most universal ATF meets ESP-M2C166-H specs. Mercon V will not hurt the transfer case, there are no soft parts in it. Although not speced for it, I'd bet motor oil or even gear lube would work fine, the only reason they use such a thin fluid is for gas mileage.

You are entitled to your opinion, but I'm betting on the throttle isn't opening correctly.

Now - do you have the same issue in 4-HI? If so, then I might buy a mechanical problem, such as binding up due to different front/rear tire sizes or axle ratios. If it were binding, I'd expect to hear some pretty nasty noises.

 

It isnt just in 4 wheel drive. 4 high works normal but when I put the shifter into the 1 or 2 position in 2wd it feels like my power is governed. My undertsanding is 1 and 2 position are lower gear ratios then D aswell as 4 low compared to 4 high but in this ford it feels like it limits the power as well. I talked to the previous owner who bought it new and says thats the way its always been.

 

There are no codes except for a intermitent rear wheel speed sensor code

 

It was doing the same thing before my OD stopped working.

 

You have electronic issues. Get it hooked up to a good diagnostic computer.

 

After re-reading the tread, glc thinks its a electronic issues. Get it hooked up to a good diagnostic computer. I AGREE, You should only have to move your gas pedal a little bit, not halfway to get the truck to move in 4 low unless you are on dry blacktop making a turn! Make sure all your tires are the same size and manufacturer and same air pressure too. I would take it to a dealer at this point.