Rear End Fluid Advice..

Posted By: WH23H6

Rear End Fluid Advice.. - 02/13/13 05:55 AM

Hey Guys,

Quick question.... who is running "what" for rear end fluid?
I have a Nostalgia Super Stocker... 3200LBS... ford 9 inch....
Doing a fluid change...looks like 90/10 to me.. I know some guys are running synthetic fluid but Im not so sure I like it for rear gears! Seems to me that the gears would be better protected by a petroleum based product due to the heavy loads and shock factors... what do you guys think?

Thanks..

Posted By: Cudafied

Re: Rear End Fluid Advice.. - 02/13/13 07:04 PM

I use Redline Heavy ShockProof it has low viscosity until it is shocked then it goes to 75w250. I don't think I would get the 75-80 passes out of my street gears before they start to crack with regular gear oil.

Click here for Redline product info page

This is what 75 runs on street gears looked like with transbrake 6000 stall and a heavy car...

Posted By: dennismopar73

Re: Rear End Fluid Advice.. - 02/14/13 01:01 AM

street i run 90-140, racin run 50 w oil

Posted By: Quicktree

Re: Rear End Fluid Advice.. - 02/14/13 01:03 AM

I run all synthetic fluids

Posted By: Dads426

Re: Rear End Fluid Advice.. - 02/14/13 02:22 AM

75-140W Synthetic. 4 years now and the gears look like new. Footbreak car, 10.00 @ 135 mph typical ET, 3500 lbs w/driver.

Posted By: Crizila

Re: Rear End Fluid Advice.. - 02/14/13 02:57 AM

Quote:

I run all synthetic fluids

80/90 full synthetic in my diff.

Posted By: Cab_Burge

Re: Rear End Fluid Advice.. - 02/14/13 04:24 AM

Scheifers 250 WT, you must warm it up before each run when cool or cold outside

All the new cars come with synthetics evrywhere they can run them, my 2006 Ram 3500 4wh.dr. calls for synthetic in both rear ends and the transfer case, I use the Redline brand synthetics gear oil in it

Posted By: 451Mopar

Re: Rear End Fluid Advice.. - 02/14/13 07:01 AM

Redline Shockproof here too.

Posted By: Thumperdart

Re: Rear End Fluid Advice.. - 02/14/13 05:01 PM

Been using Valvoline 75-90 syn. for years in my 8 3/4.........maybe that`s why it`s still alive..........

Posted By: Locomotion

Re: Rear End Fluid Advice.. - 02/14/13 05:48 PM

I've been using Amsoil Severe Gear 75w-90 in my differentials for years. My gear guy like it as well because it provides longer life for the gears as well as bearings!

Amsoil Severe Gear 75w-90

They also have a 75w-110 and 75w-140