No power in reverse
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Mountain Pass
Joined: Jun 2008
Posts: 238
Likes: 2
From: Central Mississippi
No power in reverse
I have a 2000 f-450 7.3 that is a bucket trucket. Has 16.5 gvw frame and my truck with the boom and all equiptment usually weighs aroung 13.5k
When I am in soft dirt and there is a little resistance on the wheels the truck will not back up out of dirt. The motor only revs up a little and will not pull out of dirt.
Even worse in mud except the tires will spin in mud.
I saw another 7.3 have the same problem in dirt in reverse.
Could there be a motor problem not giving it enough power or is it all the weight on truck not letting motor spin tires and get me on up out of dirt. have around 250k on motor.
Thanks for any info.
Steve Polk
When I am in soft dirt and there is a little resistance on the wheels the truck will not back up out of dirt. The motor only revs up a little and will not pull out of dirt.
Even worse in mud except the tires will spin in mud.
I saw another 7.3 have the same problem in dirt in reverse.
Could there be a motor problem not giving it enough power or is it all the weight on truck not letting motor spin tires and get me on up out of dirt. have around 250k on motor.
Thanks for any info.
Steve Polk
Cargo Master
Joined: Sep 2015
Posts: 2,859
Likes: 365
I also have a 2000 f450 and had similar problems but mine would do it no matter what surface I was on. I ended getting the tranny rebuilt with billet torque converter etc. And has been great ever since. Does this only happen when you are in dirt? Mark K would probably be the best one to answer your questions as he is the transmission guy here on this forum. If you still have the original transmission that is pretty good for 250,000 miles. It might be that time.... others will be along shortly
Thread Starter
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Mountain Pass
Joined: Jun 2008
Posts: 238
Likes: 2
From: Central Mississippi
I dirt or ether in a small hole it just wont go backwards. I take my turck off in ditches and such to reach the utility poles. Amd if it is steep bank I have to back out of forget it.
Just had transmission checked out said all is good. Had fluid filters gaskets changed for 1st time. Just needs a little moore power from motor to get me back up the hill or out of hole.
Thanks for the advice.
Just had transmission checked out said all is good. Had fluid filters gaskets changed for 1st time. Just needs a little moore power from motor to get me back up the hill or out of hole.
Thanks for the advice.
It's a Van Gogh
Joined: Feb 2010
Posts: 7,802
Likes: 1,333
From: Elk Grove, CA
Trans can overheat pretty quickly in reverse. Commonly the OE front seal will get soft and burp out some fluid. At least on F250 and F350, not sure if reverse is geared so high on F450 and up.
Cure is a trans cooler from a model year with a 6.0 engine and a real transmission temp gauge. OE dash gauge only indicates hot when it is close to critical.
Of course temp might not be your issue at all. Just FYI the conventional wisdom regarding backing issues with a 4R100.
Now, after performing arcane sigils and live sacrifice, I summon 4R100 guru @Mark Kovalsky .
Cure is a trans cooler from a model year with a 6.0 engine and a real transmission temp gauge. OE dash gauge only indicates hot when it is close to critical.
Of course temp might not be your issue at all. Just FYI the conventional wisdom regarding backing issues with a 4R100.
Now, after performing arcane sigils and live sacrifice, I summon 4R100 guru @Mark Kovalsky .
Frmr Ford Trans Engr
Joined: Aug 1999
Posts: 24,714
Likes: 2,639
From: SE Florida
When you have the problem, do you have the accelerator on the floor? If not, why not?
You say that the engine only revs a little. How many RPM is a little?
The 6.0L cooler is a good upgrade, but it won't make ANY difference at all with this problem.
You say that the engine only revs a little. How many RPM is a little?
The 6.0L cooler is a good upgrade, but it won't make ANY difference at all with this problem.
Thread Starter
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Mountain Pass
Joined: Jun 2008
Posts: 238
Likes: 2
From: Central Mississippi
Yes sir, accelerator is on floor, just kinda boggs down. Rpms im not sure betwwen 1 or 2k. When accelerator is on floor the rpms inch up just a littl. You can hear it trying to raise rpm but just wont go. Just not enogh rpm to move tires, you would think motor revs up high and start spinning wheels, but not enough rpm to spin tires.
There was another similar 7.3 and he had same problem in soft dirt.
Trnsmission cooler maybe, my truck runs all day mostly parked at locations to operate boom.
Motor needs just a little more power to the wheels, wonder about a basic tuner to use ONLY in those situations, and use it for fuel mileage also??
There was another similar 7.3 and he had same problem in soft dirt.
Trnsmission cooler maybe, my truck runs all day mostly parked at locations to operate boom.
Motor needs just a little more power to the wheels, wonder about a basic tuner to use ONLY in those situations, and use it for fuel mileage also??
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Frmr Ford Trans Engr
Joined: Aug 1999
Posts: 24,714
Likes: 2,639
From: SE Florida
The transmission cooler can't possibly be the problem. I think the problem is that the engine isn't making enough torque at low RPM and reverse gear is too high. I don't think there is something wrong, I think it isn't the best design to do what you need to do. A tuner may help.
Thread Starter
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Mountain Pass
Joined: Jun 2008
Posts: 238
Likes: 2
From: Central Mississippi
The transmission cooler can't possibly be the problem. I think the problem is that the engine isn't making enough torque at low RPM and reverse gear is too high. I don't think there is something wrong, I think it isn't the best design to do what you need to do. A tuner may help.
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