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MG MGB Technical - Rear Differential Cover Leak

I have noted a leak around the differential cover on my 1972 B. I plan to order a gasket and clean & replace it in the next month. The question I have is what type of oil, I seem to remember it being a 90W, and how can it be filled easily? The space between the fill plug and gas tank seems tight to squeeze in a qt. container and fill with a thick oil. Can anyone offer any advice on this? In professional garages I worked at in my your I have used pressurized oil dispensers that make the job easy, but don't have one in my home garage.
Joe

Is it not EP90 for the rear diff????

ANyway, I got something similar for doing this job, I am sure you can get something similar locally

http://www.tooled-up.com/Product.asp?PID=14280

C Briggs

When you replace the gasket you can also make sure the cover is flat around the flange. They tend to get out of shape around the bolt holes when the bolts are done up tight. If there is a leak people then try to tighten them even more making it worse. Carefully hammer them flat again against a flat surface.

Someone much better than me at this stuff gave me that tip (thanks Garth)!

Simon
Simon Jansen

Joe,as Simon stated...hammer it flat,and use a "ball Peen" hammer on the holes to slightly dimple them.good on a valve cover also.What gear lube weight is it,Mr. Briggs?
rich osterhout

Here is the recommended lubricants list from the workshop manual. Link to the oil I used :

http://www.millersoils.net/1_Millers_frame_CLASSIC.htm

But i cannot guarantee it is the correct one! I rang Millers some years ago and got advice from them for all the major lub parts on the car as they had a distribution base near me. This is what they suggested.

Regards

Chris

C Briggs

EP 90W gear oil is the required lubricant. For under $10 you can purchase a hand pump that screws on to the top of the gear lube container and easily fits into the diff cover. These pumps are available at almost any automotive parts store. I would also advise that you use a gasket sealant between the gasket and metal surfaces so as to prevent your having to do this job again. RAY
RAY

When I justr clicked ont he link I posted it didnt take me where I thought it would so here is the data of the oil I was trying to link to!

Classic Gear Oil 80w90 - GL4

DESCRIPTION:
* EP Transmission oil to APIGL4 for classic transmissions
* High quality solvent refined mineral base stocks with performance additives.

APPLICATION:
Use as received in gearboxes requiring extreme pressure lubricant

USER BENEFITS:
Wide ranging applications.
Viscosity grades to cover equipment requirements.
Ideal for vehicle gearboxes and trans-axles.
Recommended for gearboxes with overdrive
Suitable for rear axles not requiring Hypoid oils.

PERFORMANCE PROFILE:
Provides performance meeting or exceeding:
API GL4
MIL-L-2105

TYPICAL CHARACTERISTICS:
SAE Viscosity Grade 80W-90
Density @ 15°C 0.893

HEALTH AND SAFETY:
Health and Safety Data Sheet 1442-3 applies to this product. When used for the purpose recommended and with due regard to the appropriate Health and Safety Data, the product should cause no concern. If in doubt, consult with Millers Oils Technical Department.

C Briggs

This thread was discussed between 27/08/2009 and 28/08/2009

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