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91 F600 rear ruined

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Old Nov 24, 2013 | 12:54 AM
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91 F600 rear ruined

Somehow the low range gears in my 91 F600 2spd rear end just "went away" (disintegrated) and now my pretty decent rig is dead. What range of Ford trucks (F's, C's, L's ...?) and years might have had a similar differential? As it sits, the "mechanic" working on it only found a $6,000+ replacement (perhaps it was the whole clip even though I only need the pumpkin).

Any help would be great so I can start searching - $6K is more than I bought the rig for (maybe that's why the rear went in the first place?).

Thanks in advance.
 
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Old Nov 24, 2013 | 04:29 PM
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Is the pumpkin pulled and you've seen the gears?

Search for medium and large truck shops or yards. Ford sold billions of these with two speeds, and the axles did not change from one year to the next, so you can probably select from about 10 model years for a direct bolt in.

However, you need to know exactly what axle you have. There may still be a tag on it, or there may be some numbers stamped into the housing on the driver side.
 
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Old Nov 24, 2013 | 11:52 PM
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Pumpkin is out - low range gears = bits and sludge.

Between CL and trucktrader, there are a number of Ford F600's (700, 800) out there ranging from the late 50's to at least the 90's. As you said, I need to double-check my rearend tag to be sure what will fit.
 
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Old Nov 26, 2013 | 12:14 PM
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It appears that I've got a Rockwell RS 15210 2 speed drive axle running 4.88/6.80's. Not so easy to locate.

Geez - and I thought I had made a nice upgrade from the beater 1965 C850
 
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