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Rear main seal is leaking on my 1990 jeep cherokee larado, it has a 5speed manuel transmission, its the 4.0 litre six cylinder, will I have to pull the transmission and transfer case to repair this problem and what would the cost be to do this repair.

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No. Your engine is equipped with a two-piece rear main oil seal. The transfer case and transmission DOES NOT have to come out to change it. However, the oil pan and the rear main bearing cap must be removed so you can replace it. The motor mounts and the radiator fan/fan shroud have to come loose so the engine can be lifted to get enough clearance for the oil pan to come off. I have also had a few of the older jeeps where the valve cover had to be removed to provide clearance at the firewall area when lifting the engine.
The cost for this replacement is going to vary considerably, depending on who is doing the job. Are you planning to make this a DIY project or have a professional perform the work?

The parts are NOT very inexpensive - about $15 for the rear main seal and about $10 for the oil pan gasket. (or less) You will also have to change the engine oil and filter for this job. The valve cover gasket (ONLY if needed) will run another $40-$50.
The standard labor time to perform this operation (if you are going to have a professional do it) is 2.6 hours. Please note that a professional may charge considerably more on a vehicle of that age due to rust, broken bolts, etc. that may make the job more difficult.

Posted on May 22, 2011


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