What gear oil with Richmond 3.73s? - LS1TECH

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What gear oil with Richmond 3.73s?

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Old 02-22-2005, 01:08 AM   #1
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Default What gear oil with Richmond 3.73s?

Richmond calls for 75w-145, but factory diff. calls for 75w-90. Which to go with?
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Old 02-22-2005, 07:07 AM   #2
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Would also like to know, and how many quarts should I buy?
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Old 02-22-2005, 08:32 PM   #3
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Quote:
Originally Posted by nharrison02ss
Richmond calls for 75w-145, but factory diff. calls for 75w-90. Which to go with?
I had a friend just go with 80w-90 since the begining. I used the 75w-145 cause i bought the richmond kit.
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Old 02-23-2005, 10:34 AM   #4
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go thick or go home!

85w-140 in my moser 12 bolt w/ 4.11's and eaton hd posi and it doesnt make a sound. i've researched this quite a bit and it doesnt really matter which you use. some people seem to recommend using the heavier oil in maual cars, provides a little more support for the shock and makes things a bit quieter.


you will probably use a little over 2 quarts, i like to get a piece of rubber fuel line and slip it over the end of the bottle and plug the other end into the rear end. you can manipulate the bottle if you have a little hose on there to play with ( ). you can hold the bottle damn near vertically with enough wiggling.
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Old 02-23-2005, 08:55 PM   #5
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Just a scoshe under 2 quarts and some Limited slip additive. I've done it 3 times now.
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