Gear change question
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Senior User
Joined: Jun 2008
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From: Park Rapids MN
Gear change question
08 F 450 that had a 488 changed to a 373. Truck has been working great and driven about 2000 miles since then change. Hauling my 5th wheel for the first time I notice a binding noise coming from the back when turning sharp corners only. to me it could be the second axle on the trailer skidding around the turn but I've never noticed this before. My truck is a 2x4, any thoughts?
Thanks
Thanks
Senior User
Joined: Nov 2008
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From: Utah
I think its your Ls rear axle making the noise.. When I went to 4:10 ratio I noticed it more also. How is your milage with the 3.73 ? I thought about going to that ratio also. I just wanted to lower my RPMs so I did the 4.10.
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Joined: Jun 2010
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From: Glenwood City, Wis
08 F 450 that had a 488 changed to a 373. Truck has been working great and driven about 2000 miles since then change. Hauling my 5th wheel for the first time I notice a binding noise coming from the back when turning sharp corners only. to me it could be the second axle on the trailer skidding around the turn but I've never noticed this before. My truck is a 2x4, any thoughts?
Thanks
Thanks
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Senior User
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From: Park Rapids MN
After you make the change your abs light will stay on because of the position of the sensor, it no longer lines up with the gear inside your rear end.
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From: Glenwood City, Wis
How can one fix that? My ford dealer found a place that they say can fix it for $1500 but that is way to much!
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Senior User
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From: Park Rapids MN
Most of us drive with the light on.The sensor is gear driven and one guy made a sproket then mounted it in front of the drive shaft then made a bracket to hold the sensor. He was asked if there was any interest in making reto kits but I don't believe he responded.
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From: Glenwood City, Wis
Ok well does anyone have any trouble with shifting when pulling up steep grades? I had a hell of a time almost two yrs ago pulling my 5th wheel on I 80 to Reno.
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Was the cost ($$) of the gear change worth it in fuel savings? anyone? Does it pay for itself?
I have same unit but 4x4 and wonder if change would be worth the cost. Understand I would have to change both front and rear gear Would like lower RPM at 60 to 65 mph. Of course empty MPG of 16 to 19 WBN!
I have same unit but 4x4 and wonder if change would be worth the cost. Understand I would have to change both front and rear gear Would like lower RPM at 60 to 65 mph. Of course empty MPG of 16 to 19 WBN!
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Joined: Nov 2008
Posts: 164
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From: Utah
Was the cost ($$) of the gear change worth it in fuel savings? anyone? Does it pay for itself?
I have same unit but 4x4 and wonder if change would be worth the cost. Understand I would have to change both front and rear gear Would like lower RPM at 60 to 65 mph. Of course empty MPG of 16 to 19 WBN!
I have same unit but 4x4 and wonder if change would be worth the cost. Understand I would have to change both front and rear gear Would like lower RPM at 60 to 65 mph. Of course empty MPG of 16 to 19 WBN!
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Cost of change
Sounds good...I should have stated the RPM reduction at 60 to 65...of course it will reduce the RPM at all speeds if you change the ratio from 4.88 to 4.10 or 3's.
When I reread the post it sounded like I knew nothing!!! My error.
So now to the positive statement of 2 changes and both on 08 was impressive. What was the cost about? Was either a 4x4?
Thanks for the reply.
When I reread the post it sounded like I knew nothing!!! My error.
So now to the positive statement of 2 changes and both on 08 was impressive. What was the cost about? Was either a 4x4?
Thanks for the reply.