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Old 02-03-2013, 07:44 PM   #1
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Default Rear end fluid?

Hey guys just wondering if the rear end takes the same 85/90 gear oil my Mazda took?
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Old 02-03-2013, 08:54 PM   #2
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last time i checked my books i think it was 75-90 but 85-90 should be alright
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Old 02-03-2013, 09:21 PM   #3
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I'd put the same stuff in the rear end that goes in the manual transmission.
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I'd like to know where all those trim screws decided to wander off to.
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Old 02-03-2013, 09:56 PM   #4
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FSM calls for standard differential gear oil, in GL5 flavour.
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Old 02-03-2013, 11:53 PM   #5
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Man, after dealing with that POS Nissan 5 speed tranny, I'm gun shy.
(We) need SPECIAL tranny lube??? - faggy.
WTF??? Nissan has special requirements for their tranny???

Fotunately, the rear is much heftier than that POS tranny. Hefty...
Go with 85 - 90 uness you have an LSD.
Then you need the magic LSD juice.

Confucius say: Nissan have crappy transmission...

Last edited by Boozehero; 02-04-2013 at 02:37 PM. Reason: spelling
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Old 02-04-2013, 01:27 AM   #6
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its not special, pretty much every older vehicle needs GL4 in the gearbox. only older Japanese vehicles i can think of that needed special fluid even back in the day is stickshift Hondas
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Old 02-04-2013, 12:28 PM   #7
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Quote:
Originally Posted by Midnight Tech View Post
I'd put the same stuff in the rear end that goes in the manual transmission.
No! GL-4 is needed in the manual transmission, or you'll wear out your brass synchronizers!

Newer GL-5 is fine in the rear axle, though, because it does not have any "yellow metals" (brass parts).
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Old 02-04-2013, 02:41 PM   #8
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Quote:
Originally Posted by hrd_bdy View Post
its not special, pretty much every older vehicle needs GL4 in the gearbox. only older Japanese vehicles i can think of that needed special fluid even back in the day is stickshift Hondas
I guess I shouldn't beef.
You are right - Hondas require their own brand of tranny oil. ATF doesn't work well in a Honda. I have seen them come into a freind's (Ricer) shop with grinding gears, he installed the correct Honda oil and the grinding pretty much stopped (decreased dramatically).

I have numerous old school American rigs that use gear oil in the tranny. They took some pretty hard abuse and never had any yellow metal problems.
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Old 02-04-2013, 11:31 PM   #9
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Any way to tell if its LSD? I don't know how to tell and the dirham codes are painted on both trucks. So I'm going in blind. And what is gl5? Nissan brand? Or any parts store
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Old 02-04-2013, 11:43 PM   #10
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GL-5 is any parts store.

The Limited Slip Differential is most likely on the Heavy Duty version (mine) and 4x4 versions, but I doubt LSD lube would hurt a non-LSD rear axle.

So, LSD would be safe to cover either version.
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