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Old 01-28-2008, 08:36 PM
otter 1 otter 1 is offline
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2001 F-150 Rear End Gear Lube

I had my rear end completly replaced on my 01 F-150 Crew Cab with 62000 miles on it. The specks say to use a 75-140 Syn gear lub wich they did Valveoline VV 982 lube. This afternoon I had a mech. tell me that he used to work at a Ford Dealership and that they had some problems with the 00 & 01 rear ends useing the syn lube and they had went back to the 90W gear lube without any problems. Has anyone heard of this takeing place? The rear end was a 355 if that's any help. Thanks for any help or insite you might give.
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Old 01-29-2008, 10:11 AM
jimandmandy jimandmandy is offline
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I havent heard of problems with the Sterling/Ford differentials, but it is possible. I had a 93 GM 8.875 that started seeping from the pinion seal as soon as I changed to syn, but it had dino as factory fill. Toyota uses dino in limited slip units, but syn in the open ones.

Jim
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Old 01-29-2008, 11:03 AM
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I had the rear end open on my '05 a few months, (about 10,000 miles) back.
Same rear end as your truck.
I used a house brand from a local inependent shop.
Something or other Synthetic 75-140. It seems to be working perfectly.
Assuming you have an open diff, I suspect you'll be fine.

The guy you talked to mentioned "problems". Did he elaborate?
Leaking?
Nosie?
Bearing failure?
Gear wear?

Thanks.
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Old 01-29-2008, 12:38 PM
otter 1 otter 1 is offline
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He mentioned about noise and gear wear. On mine, the diff bearings were starting to pit, plus the gears were wearing, and the reason I noticed it was it seemed to be making quite a bit of noise (howling) from what sounded like the back end. After I replaced everything brand new (Ford) which was under extended warranty I can't hear any noise what so ever. The thing is if it calls for syn. lube thats what I would like to use. Just wondering if anyone else had heard of that type of problem.
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Old 01-29-2008, 12:38 PM
 
 
 
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