1979-04 Ford Mustang Rear Main Seal Repair Sleeve

Mustang Rear Main Seal Repair Sleeve (79-04)

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  • 1979-2004 Mustang 5.0L/3.8L Rear Main Seal Repair Sleeve
Mustang Rear Main Seal Repair Sleeve (79-04)

This 79-04 Mustang Redi-sleeve rear main seal repair sleeve helps fix leaking, grooved output shafts.

Item #LRS-6701RK

Everyday Low Price: $49.99

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  • Repairs Grooved Harmonic Balancer Shafts
  • Easy Installation


  • Installation Tool Included
  • Helps Prevent Leaks

What's in the Box

  • (1) Rear Main Seal Repair Sleeve
  • (1) Installation Tool

Product Description

Mustang Front Main Seal Repair Sleeve
Got a leaking rear main seal on your 1979-2004 Mustang motor? This rear main seal repair sleeve can help make the fix! Over time, rubber seals can wear slight grooves into the metal seal surface which can cause oil to leak from the rear of your motor, where the transmission meets the motor. This Redi-sleeve repair kit easily installs onto your motor's output shaft with the included installation tool to make for a smooth mating surface for your new seal. Simply slide the sleeve onto the shaft and place the installation tool onto to sleeve. Slightly hammer the top of the tool to push the sleeve down to the bottom of the shaft. Once it has hit the bottom, you are ready to install the new seal and get your transmission reinstalled. This kit includes 1 sleeve and 1 installation tool.

- Fits 1979-2004 Mustang 2.3L, 3.8L,4.6L and 5.0L applications.
- Also fits Lightning Applications

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Product Reviews (4)

out of 5 stars
3 stars
4 reviews
5 stars    2
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2 of 4 REVIEWS
2 of 4 REVIEWS

1 Stars   Still leaks oil.
By on 9/6/2014
I bought this and used it after rebuilding my engine. Got everything together and running, and the rear main still leaks. Not too happy. Wasted my money.
From LMR.com: If this part was in stalled and the leak still is evident, then you may have a different issue. After reading that your motor is freshly built, the only thing I can think of is that if the main caps were line bored, it could have shifted the crank slightly in the rear main seal causing the leak. The only fix for this is the more expensive teflon rear main seal from Fel-Pro
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1 Stars   non working band aid
By on 7/4/2014
I replaced my rear main seal and used this repair sleeve and it leaks just like before. 50.00 and no change.
From LMR.com: We apologize that you are having an issue with this part, Please expect a call from a customer service representative on the matter shortly.
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5 Stars   Did the job
By on 6/15/2016
i did a clutch on my 86 mustang about a year ago. and everyone told to replace the rear main seal while your in there. i replaces it and started leaking. replace the rear main 3 times and still leaked. but a steal sleeve on it and now no more leaks and great fit.... Thanks LMR......

Yes, I would recommend this item to a friend!

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5 Stars   Great fit and fixed my leak!
By on 6/15/2016
It's been about 8 months since installed and still no leaks!

Yes, I would recommend this item to a friend!

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Vehicle Applications

Ford Mustang - 1979 (79) - 1980 (80) - 1981 (81) - 1982 (82) - 1983 (83) - 1984 (84) - 1985 (85) - 1986 (86) - 1987 (87) - 1988 (88) - 1989 (89) - 1990 (90) - 1991 (91) - 1992 (92) - 1993 (93) - 1994 (94) - 1995 (95) - 1996 (96) - 1997 (97) - 1998 (98) - 1999 (99) - 2000 (00) - 2001 (01) - 2002 (02) - 2003 (03) - 2004 (04)

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Ford Mustang Parts » Mustang Engine & Underhood » Mustang Engine Gaskets » Mustang Rear Main Seal
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