Need Transmission Techies Help
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Tuned
Joined: Apr 2002
Posts: 260
Likes: 2
From: Apache, OK
Need Transmission Techies Help
I just finished a 1,100 mile trip with 9200 lb trailer, about 70 MPH, using tow/haul. The last 50 miles were two-lane through small towns. It started "clunking" really hard when it downshifted into low gear. Take it out of tow/haul and all is fine.
Is this going to cost me a ton of money?
Is this going to cost me a ton of money?
Postmaster
Joined: Dec 2003
Posts: 4,196
Likes: 10
From: Arizona
Originally Posted by Jim McCarty
I just finished a 1,100 mile trip with 9200 lb trailer, about 70 MPH, using tow/haul. The last 50 miles were two-lane through small towns. It started "clunking" really hard when it downshifted into low gear. Take it out of tow/haul and all is fine.
Is this going to cost me a ton of money?
Is this going to cost me a ton of money?
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Tuned
Joined: Apr 2002
Posts: 260
Likes: 2
From: Apache, OK
Except for the exhaust, no mods. It has 62,000 miles. It did this a couple of time before when I was pulling my 14,000 RV, but that was at aound 5,000 miles. This past summer I took a 2,500 mile trip with RV and it never did it. This time it only did it only did it at the last few miles of a long day.
Frmr Ford Trans Engr
Joined: Aug 1999
Posts: 24,714
Likes: 2,640
From: SE Florida
I wouldn't worry about it. Sometimes the learning program in the trans controller doesn't do what it should and makes a hard shift. It should learn it's way out of it, or you could disconnect both batteries to reset it quicker.
Junior User
Joined: Jun 2006
Posts: 53
Likes: 0
From: Houston area.
My 2003 CC DRW 6.0 did the exact same thing. When downshifting to low in tow/haul it slammed so hard I worried about collateral damage. Ford reflashed (reprogrammed I guess) the computer and it never did it again.
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Tuned
Joined: Apr 2002
Posts: 260
Likes: 2
From: Apache, OK
Thanks for the feedback. I made the return trip with 7,200 lb trailer and it never did it again. I'm not going to worry and just get some better shifting when I can afford Matt's tunes.
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