2001 F250 Powerstroke Trans Problem

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Jul 13, 2011 | 12:12 AM

1Roushboy

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2001 F250 Powerstroke Trans Problem

Heavily used and borderline abused 4X4 Crew Cab with 7.3/4R100 4.10 L.S. that recently began exhibiting a problem going from reverse into drive. Truck lags and revs before engaging but after ten seconds the trans engages and we're off with absolutely no hint of a problem for hundreds of miles. Random and not seemingly effected by temp., load, or speed, it acts up without any precurser. Trans has been flushed three times in its life, ( bought the truck with 11 miles on it ), with the last service done about 7500 miles ago. Truck has 98,000 miles on it and has been absolutely trouble free, it has surpassed every expectation and even managed to turn a few Chevy friends of mine into Ford owners. ( Obama helped a little too ). Hooked up the scanner which revealed no codes and dropped the pan at the Ford dealer which was spotless. No strange noises and no fluid leaks...I'm at a loss. Dealer wants to R&R to diagnose but the tech seems as baffled as I am. He admits its a strange situation. Oh, and he drove it for four days and never duplicated the concern. Help a guy on a tight budget PLEASE.

Jul 13, 2011 | 12:23 AM

ToMang07

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From: Maine

Where are you located? What did you use for a scanner?

Just FYI the 99-03 7.3 Tranny was a 4R100.

Jul 13, 2011 | 03:00 AM

Mark Kovalsky

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From: SE Florida

My guess is that your 4R100 trans has a damaged seal in the reverse clutch. The only way to know for sure is to drop the trans and tear it down.

Jul 14, 2011 | 02:18 PM

1Roushboy

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Oops, thank-you on correcting my mistake. I am in California and the scanner we used was a Motorcraft scanner but I'm not sure of the Model #. We did it at the Ford dealer.

Jul 14, 2011 | 02:20 PM

1Roushboy

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So a damaged reverse clutch would make it not go in forward after reversing? It does fine in reverse.

Jul 15, 2011 | 05:47 AM

Mark Kovalsky

Frmr Ford Trans Engr

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From: SE Florida

Nope. I didn't read your first post correctly.

It MIGHT be a forward clutch seal problem. This doesn't exactly match what I would expect from a forward clutch seal.