transmission range sensor
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Hotshot
Joined: Mar 2001
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From: Manhattan, KS
I just had the same experience, but now all is good with a factory Ford rebuilt transmission and upgrade to a 6.0 cooler. Mine wouldn't go except into reverse for several days. I let it set and got a trailer lined up to haul it to the shop and backed it to where I was going to load it. It decided to trick me one more time and went into drive and low gear fine and I was able to drive it 20 miles to the dealer's repair shop.
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The transmission is working fine...it only does not engage every once in a while..if its hot from pulling my excavator and I back in my long driveway it sometimes won't go in gear...but I let it cool and the next day it goes in gear again... I drove it today and it ran great....its as if a valve is sticking only when its hot and I back up a good distance. ...
Hotshot
Joined: Mar 2001
Posts: 13,542
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From: Manhattan, KS
That is what mine would do. I tried tightening the linkage bracket under the dash and even did a full trans flush. It seemed OK and I seven spent a week in the mountains of CO. towing a trailer with an off road rig. I was 100 miles from home and backed up to park the trailer at a friend's house. Unhitched and no drive and minimal low gear.
Sorry, but is on its way out. I didn't want to be stranded again.
Sorry, but is on its way out. I didn't want to be stranded again.
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Joined: Sep 2011
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From: Vancouver
You could do the flow test to see how long it takes to put a gallon of fluid in a bucket at idle. If your pump is going or the filter is restricted, low flow through the coolers could cause tranny overheating when towing. Does the F-550 have a transmission temp gauge?
Do you still have both coolers functional? It seems like the problem only appears when you have been towing a distance.
Do you still have both coolers functional? It seems like the problem only appears when you have been towing a distance.
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No the 550 doesn't have a transmission temp gauge. ..now that you say that I wish it did..but it is only when towing a piece of equipment that it acts up after a pretty long haul...but only if I put it in reverse and idle into a spot...but both coolers are working as far as I know...it seem exactly as you said ..like there is a restriction ...I think im gonna change the filter first....and then I would like to see if the pump is weak.
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No the 550 doesn't have a transmission temp gauge. ..now that you say that I wish it did..but it is only when towing a piece of equipment that it acts up after a pretty long haul...but only if I put it in reverse and idle into a spot...but both coolers are working as far as I know...it seem exactly as you said ..like there is a restriction ...I think im gonna change the filter first....and then I would like to see if the pump is weak.
How long should it take to pump out a gallon of fluid at idle....?
How long should it take to pump out a gallon of fluid at idle....?
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