TorqueShift Issue

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Nov 10, 2005 | 04:21 PM

Fireferg73

Thread Starter

Mountain Pass

Joined: Sep 2005

Posts: 179

Likes: 25

From: Tucson, AZ

TorqueShift Issue

I've got an 03 F-250 with 45,500 on the clock. The issue is sometimes the tranny shifts smooth as silk and sometimes it shifts harsh, especially the 1-2 shift and 2-3 shift. It's had numerous parts "replaced", (EPC Solenoid, Fluid, Remote Filter, another shift Solenoid.) Issue remains with same throttle pressure each time, sometimes smooth and other times harsh. Any ideas?
Solenoid part #'s:
4C3Z-7G383-AA (1st time)
3C3Z-7J136-BA (2nd time)
P.S. Symptoms do not seem to change whether cold or warmed-up.
Thanks,
Jay

Nov 15, 2005 | 08:08 PM

BigF350

FTE Leadership Emeritus

Joined: May 2004

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From: Melbourne, Aus

Bump

Nov 15, 2005 | 10:27 PM

Dieselhound

Senior User

Joined: Oct 2004

Posts: 157

Likes: 0

From: Orange County, California

If I were you, I would disconnect the batteries and do a re-learn on the transmission. Somewhere in the tech folder sticky are instructions on how to Re-Learn your tranny shift points. It involves doing light throttle upshifts, medium throttle upshifts and full throttle upshifts. Then repeat again with tow haul engaged. If you do the re-learn process just right, it shifts like a dream.

Nov 16, 2005 | 09:20 PM

Little Bill

New User

Joined: Nov 2005

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I have a 2005 F350 6.0 diesel with the same problem that the dealer can't diagnose. Does the 2005 auto trans have the same re-learn feature?

Nov 16, 2005 | 10:45 PM

Fastest1

Senior User

Joined: Aug 2004

Posts: 180

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Yes all 5R110 trannies have it. However mine was just diagnosed with a bad speed sensor. We will see.

Nov 17, 2005 | 11:37 AM

Fireferg73

Thread Starter

Mountain Pass

Joined: Sep 2005

Posts: 179

Likes: 25

From: Tucson, AZ

Fastest1, post the results when you get em, I would love to find out how they diagnosed a bad speed sensor. Thanks, J-

Nov 17, 2005 | 02:58 PM

Fireferg73

Thread Starter

Mountain Pass

Joined: Sep 2005

Posts: 179

Likes: 25

From: Tucson, AZ

Well, I d/c'd the batteries and did the tranny re-learn process and it seems to have helped dramatically. When I picked it up from the dealer when the work was done, I asked the SA if the batteries were d/c'd and he said "yes, I think the d/c the batteries when they do this kind of work." I should have known when I got in her and the clock and radio stations were still set! Anyway, when I unhooked the batteries, two weird things happened. First- my clock needed to be reset (expected) while my radio stations did not (not expected) Second- after I started her up and began the re-learn process, my A/C would cut it and out (stuck a Thermometer in the vent) Pulled over and turned the truck off, waited a few seconds and re-started and all is well with the A/C, very strange??

Thanks for the help all!
J-