has anyone ever used this in there Rear Differential? I want to put it in mine but dont know how much exactly to buy? Comes in 1 Quart Bottles. I have a 1991 Nissan Hardbody 2WD 4Cyl. Im guessing i buy 4 bottles?
tateb, I don't know of a diff that takes more than 2 quarts of gear oil. Better to have more than you need ... but 4 quarts?
Red Line gear oils are great stuff for most applications. I don't bother with their motor oils anymore but since the capacities in diffs are small, and the drain intervals are measured in years, I think their gear oils (provided you select the right one for your application) are well worth the slight added cost.
I take it you have no manual(s) which provide(s) capacity info??
the rear end calls for 3 pints (1.5 qt) of 85W90 GL-5. I remember because i bought it in the 1-quart size thinking it would be enough, and had to go buy another bottle. as a general rule, though, just park the truck on a level surface and fill it up until it trickles back out. the book also says "DO NOT OVERFILL", so make sure once it is trickling out, you let it finish hehe...
also: if you have a limited slip differential, make sure you get the nissan limited slip additive. i had a firebird formula and used all royal purple fluids (which i preferred to redline, after seeing tests in which royal purple proved superior), and made the mistake of assuming that the limited slip additive included in the fluid was appropriate and adequate. a couple weeks later after a few runs at the local track, i heard clunking noises on turns, which apparently indicated "blown out clutches", as my shop teacher said. he told me that, although a lot of fluids on the market contain limited slip additive, it is still necessary to buy the actual additive from the dealer. to be safe, my assumption is that nissan is the same way.
"I had a Firebird Formula and used all royal purple fluids (which I preferred to Red Line, after seeing tests in which royal purple proved superior) ..."
I'd love to see this info. I'm familiar with both fluids and would give the nod to Red Line in half a heartbeat. Got a link to the test info?
" ... (I) made the mistake of assuming that the limited slip additive included in the fluid was appropriate and adequate. A couple weeks later, after a few runs at the local track, I heard clunking noises on turns, which apparently indicated "blown out clutches", as my shop teacher said. He told me that, although a lot of fluids on the market contain limited slip additive, it is still necessary to buy the actual additive from the dealer. To be safe, my assumption is that Nissan is the same way."
There are a number of of limited slip designs out there and each is a little different. Same with fluids and their out-of-the-bottle coefficient of friction (limited slip diffs need some friction to work). Sometimes you get away with fluids as they are, some need "help" from the little bottles of additive.
I've heard Royal Purple gear oils claim to be fine as-is for limited slip diffs but they needed extra additive in now two instances. Most Red Line gear oils come in two versions: One for open diffs, a different formula for LS/posi rear ends. I'd bet that the LS formula would be fine all by itself.
Rule of thumb: No matter what kind of LS diff you have, no matter what the claim of the oil you are using, be prepared to add some limited slip diff additive if your rear-end starts acting up. You might not want to buy a bottle ahead of time, but you better know where you can get some on short notice. Red Line makes this stuff but it's available from GM dealerships and plenty of other places, too.
after a few runs at the local track, i heard clunking noises on turns, which apparently indicated "blown out clutches
- Bryan
if an LSD is HOT it will be grabbing alot better, and alot sooner than cold. i think that if you've got sticky tires its going to galunk on tight turns because its locking up and can't break a tire... i get this all the time on a tight hairpin at shannonville in my car (AWD with rear LSD). under power its pretty loud. maybe the fluid is letting your dif work better than before
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