Rear diff. seals

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May 2, 2004 | 11:45 AM

chrono4

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From: Elkhart IN

Rear diff. seals

I'm rebiulding a 88 f150 and i've flushed and changed the rear diff. oil but now theres a pretty steady drip comming for the front seal going out to the drive shaft. I was just curios if anyone else has noticed it. thanks. Drew

May 2, 2004 | 01:07 PM

MustangGT221

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From: Topsfield, MA

If anyone else has noticed it? What do you mean?

It's not a common problem, its just that you need to re-place that seal if it's leaking.

May 2, 2004 | 09:40 PM

chrono4

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From: Elkhart IN

Yea i was just curious if anyone else was having or have had that problem. Thanks

May 3, 2004 | 01:42 AM

MustangGT221

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From: Topsfield, MA

Yup, it happens when the seal is bad....pretty straight forward situation

May 3, 2004 | 01:06 PM

muxpux

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From: Longview, WA

i have the same problem. i was wondering how i drain/replace gear oil in the diff? theres no plug there. at least that i can see. i have a 78 bronco, 9" rearend i believe. also what type gear oil? and any estimate on how much the seal is?

May 3, 2004 | 04:51 PM

chrono4

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From: Elkhart IN

if your broncos rearend is like mine then to drain you have to take the rear coverplate off to drain the oil and to refill it afterwards there is a plug on the frontside about half way down. i didnt see mine at first because it blended in due to the thick mud on it. i use 80w 90 castrol. i dont no about the seal yet. hope this hepls

May 3, 2004 | 04:55 PM

pops_91710

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From: Chino, California

chrono4, what you need is a pinion seal. I replaced a couple before. Drop the drive line, remove the yoke, pop out the seal, put in the new seal. Piece o' cake.