rear differential leaking

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Mar 31, 2007 | 03:01 PM

Greenlawnracing

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rear differential leaking

There is a little bit of oil coming out of my rear differential.

My understanding is to simply unbolt the cover, drain the oil, make a new seal with RTV, bolt it back up, and replace the oil.

Is that correct?

Mar 31, 2007 | 03:36 PM

mackman

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From: Orlando

Yup that is it of course you should check cover for flatness at sealing flange then clean off all oil residue RTV not like oil.Brake cleaner is good

Mar 31, 2007 | 03:42 PM

Green_Dually

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From: Connecticut

I used the "right stuff" to reseal my meatball...Worked great,apply let set for about 30 mins,then install cover.
No leaks.

Mar 31, 2007 | 06:08 PM

Greenlawnracing

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Do I need to add a friction modifier?

Mar 31, 2007 | 06:12 PM

Green_Dually

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From: Connecticut

Quote:

Originally Posted by Greenlawnracing

Do I need to add a friction modifier?

That depends on if you have the limited slip rear...

Mar 31, 2007 | 06:13 PM

Greenlawnracing

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How do I know if I do?

Mar 31, 2007 | 06:15 PM

Green_Dually

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From: Connecticut

what model,year,style truck do you have?

what rear do you have 4.10,3.73 ????

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Mar 31, 2007 | 06:20 PM

99f350sd

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From: Lyndonville, Vermont

Tag on the diff. Give us the numbers...Use The right stuff but put the cover on right after you squeeze it out. Stuff comes in a cheese wiz can..Don't put on crackers.
Use synthetic 75-140. Tag has LS or L on it for Limited slip rears..other silicones are crap compared to the right stuff...

Dick

Mar 31, 2007 | 06:21 PM

#10

Green_Dually

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From: Connecticut

Look on the drivers door jam,there is a sticker there.It has your GVW on it,also has other info on the sticker.We need to know the axle code to tell you what axle you have.

Mar 31, 2007 | 06:37 PM

#11

Green_Dually

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From: Connecticut

you can use this to decode the sticker..

https://www.ford-trucks.com/article/...r_Decoder.html

Mar 31, 2007 | 06:57 PM

#12

Greenlawnracing

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The tag is really hard to read. I think it says:

s 409 h
3l73 10 5 1b20

Mar 31, 2007 | 06:59 PM

#13

Greenlawnracing

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the axel is a C1

Mar 31, 2007 | 07:33 PM

#14

99f350sd

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From: Lyndonville, Vermont

373 limited slip

Mar 31, 2007 | 07:44 PM

#15

Greenlawnracing

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ok......additive it is? I bought Mobile 1 synthetic gear oil and Trans-x limited slip gear oil additive

http://www.crcindustries.com/auto/co...?PN=402508&S=N

Will that work?

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