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Knocking in rear end.

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Old Oct 24, 2007 | 10:33 AM
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From: ma
Knocking in rear end.

My 79 F250, has developed a knock in the rear end. When turning left only, and only once. Feels like there is a small bind, then a small dull shutter through the truck, it just started. I had a problem once when the roll pin that holds the spider gears pin walked out and at random times the big pin would walk and bang around, it was bandaged and prayers were said. I wonder something is finally giving up? It is my daily driver and I am trying to find the time.

Am I correct in saying that I have a Dana 60 4:10's? I pull a 24' enclosed car trailer with the truck and if I have to change or replace anything I'd like to put in the best combination I can. Any ideas. Anyone in New England tripping over one in case I have to replace anything?


Thanks Chris
 
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Old Oct 24, 2007 | 11:08 AM
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NumberDummy
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Originally Posted by ferrwrench
Am I correct in saying that I have a Dana 60 4:10's?
Thanks Chris
It is a Dana 60, but other ratios were available besides 4.10's. If the rear axle is original, look on the Warranty Plate for the AXLE code. Then you can use FTE's axle decoder, or post the code here.
 
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Old Oct 24, 2007 | 12:01 PM
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The sticker is faded but the data tag on the door says 22v for axle code! Not sure what is is.
 
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Old Oct 24, 2007 | 01:40 PM
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22 = 1979 F250 / Dana 61 / 3.07-1 / non Limited Slip / 5300 lb. Rear Axle Capacity

V - 3850 lb. Front Axle Capacity / Adjustable Column with Power Steering

While Dana 61's were offered from 1973, they are uncommon, and not nearly as popular as the Dana 60.
 
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Old Oct 24, 2007 | 05:54 PM
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That's it... if I am going to continue to use it the way I do should I think about hunting a Dana 60, if so what gears should I put in for towing?

thanks for the info
 
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Old Oct 24, 2007 | 08:12 PM
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That sounds like the same problem that I just went through with my 2006 E-350. The vehicle would kinda chug-vibrate when turning at low speeds and had a faint clunking sound from the rear end. It ended up being a clearance problem with the spider gears. You probably have a spider gear starting to fail.
 
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Old Oct 24, 2007 | 09:22 PM
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Pull the cover, look for anything other than sludge and gear oil. Do you have a limited slip, or an open diff?
 
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