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-   -   Diff fluid question (http://www.jeepforum.com/forum/f96/diff-fluid-question-1537763/)

Jeffro3000 06-17-2013 03:51 PM

Diff fluid question
 
Im going to be changing my diff fluid for the first time. My manual says 80w/90...but im seeing 75w/90 on the web....does it matter?

ronjenx 06-17-2013 04:02 PM

Quote:

Originally Posted by Jeffro3000 (Post 15573347)
Im going to be changing my diff fluid for the first time. My manual says 80w/90...but im seeing 75w/90 on the web....does it matter?

No, it doesn't matter, as long as the one you use is API GL-5 rated.

LVCapo 06-17-2013 04:10 PM

100 Attachment(s)
I use Amsoil 75W/140 Severe Gear front and rear in my Jeeps. Make sure if you have the LSD in yours that you pi8ck up the additive from a local dealership.

JIMBOX 06-17-2013 04:30 PM

:cool: My manual also ref's 75w-140 (syn) for HD/towing-

I use Valvoline 75w-140 in both diffs-

:rofl::rofl: JIMBO

NCSahara 06-18-2013 05:50 AM

I use Valvoline Durablend in front and rear. Great oil for 9bucks a qrt.

Butterjeep 06-18-2013 06:32 AM

I use the cheapest proper diff fluid I can find. It's a fluid I change frequently and the only benefit to pricey synthetic would be extended drain intervals.

jkode87 06-18-2013 09:09 PM

75 140 synthetic with the additive every 30k

Or as needed with these axle tube seal leaks.....

Wavedatya 06-19-2013 06:16 AM

Quote:

Originally Posted by jkode87
75 140 synthetic with the additive every 30k

Or as needed with these axle tube seal leaks.....

What he said

Jeffro3000 06-19-2013 09:59 AM

https://www.facebook.com/photo.php?v=4390059050166
Thanks for the replies....but what's the real difference. The spots I wheel at can have alot of water....so I'm going to start changing it more often. So if I'm changing it a few times a year, will syth matter? I'm doing it becase my diffs are weeping, so I'm changing it and using lubelocker gaskets.

LVCapo 06-19-2013 10:11 AM

100 Attachment(s)
Quote:

Originally Posted by Jeffro3000 (Post 15581445)
https://www.facebook.com/photo.php?v=4390059050166
Thanks for the replies....but what's the real difference. The spots I wheel at can have alot of water....so I'm going to start changing it more often. So if I'm changing it a few times a year, will syth matter? I'm doing it becase my diffs are weeping, so I'm changing it and using lubelocker gaskets.

I think you just kind of answered your own question:dunno:

Synthetics are a great option for people operating under severe conditions, or who want to extend their fluid change schedule...if you are going to change fluid frequently, go with the cheapest quality selection possible.

duneslider 06-19-2013 10:12 AM

I use the synthetic mainly because it doesn't smell as bad as the dino version.

Wavedatya 06-19-2013 10:23 AM

I use Amsoil 75w-140 for towing purposes

SubAtomicGenius 06-19-2013 12:28 PM

Quote:

Originally Posted by Jeffro3000 (Post 15581445)
https://www.facebook.com/photo.php?v=4390059050166
Thanks for the replies....but what's the real difference. The spots I wheel at can have alot of water....so I'm going to start changing it more often. So if I'm changing it a few times a year, will syth matter? I'm doing it becase my diffs are weeping, so I'm changing it and using lubelocker gaskets.

If you go watersporting alot, go and buy a 5-gal pail of 80w90 or 80w140 (towing) dino that meets the spec and change often. If you go synthetic, you're only wasting money every time you suck water into your diff. :wave:

Butterjeep 06-19-2013 07:24 PM

Quote:

Originally Posted by Butterjeep (Post 15575752)
I use the cheapest proper diff fluid I can find. It's a fluid I change frequently and the only benefit to pricey synthetic would be extended drain intervals.

I'll requote myself because I think it answers your question. If you'll drain it out relatively soon, why pay a fortune for it?

Godholio 06-24-2013 10:46 AM

Quote:

Originally Posted by duneslider (Post 15581516)
I use the synthetic mainly because it doesn't smell as bad as the dino version.

I recently changed the rear diff fluid in a 47-year old Chevy with about 110k miles...I don't know if it had ever been done before, but the smell was indescribable.


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