ATF in LSD

Website · Post by **Maggot4x4** » Wed Apr 20, 2005 12:13 pm

I have heard a rumour that if you run ATF in an LSD it will improve how they lock up.

Has anyone tried this or have any feedback?

Post by **mkpatrol** » Wed Apr 20, 2005 12:36 pm

Nope you must use LSD gear oil otherwise you will have problems

Post by **Gribble** » Wed Apr 20, 2005 12:59 pm

It wont help you at all, if your lsd doesn't work odds are its rooted.

Post by **Brendan-s** » Wed Apr 20, 2005 6:00 pm

you can fit Alcohol, Tobacco and Firearms in your diff? PARTY!

Post by **-Scott-** » Wed Apr 20, 2005 6:59 pm

4130warrior wrote:you can fit Alcohol, Tobacco and Firearms in your diff? PARTY!

Hmmm - sounds like a yank...

Post by **bazzle** » Thu Apr 21, 2005 12:09 pm

Run normal Diff oil . It allows the plates to stick more than with lsd additive.

Bazzle

Post by **rOd** » Thu Apr 21, 2005 1:07 pm

bazzle wrote:Run normal Diff oil . It allows the plates to stick more than with lsd additive.

Bazzle

So its actually the LSD additive, that causes the slippage between plates?

I thought it was the other way around.

The additive helps it grip.

Post by **-Scott-** » Thu Apr 21, 2005 1:51 pm

The LSD additive allows them to slip smoothly - without the additive the plates continually grip and release, creating additional noise, vibration and shock loads through your transmission.

Some LSDs (Jackaroo springs to mind) need extra additive, as standard LSD oils don't allow smooth enough action.

If you want improved "grip" have a specialist overhaul it. They can replace the friction plates if they're worn, and/or add shims to increase the preload.

Scott

Post by **Gribble** » Thu Apr 21, 2005 2:09 pm

I run castrol LSX80/140 with Molybond 2.5 in my rear diff, which is what we run in 99% of utes at work. But we are talking a hilux LSD so its really feeding strawberries to pigs.

Post by **bazooked** » Fri Apr 22, 2005 10:39 am

atf is a hydraulic oil not a lubricating oil, so it will stuff ur bearings.

Post by **Strange Rover** » Fri Apr 22, 2005 5:14 pm

bazooked wrote:atf is a hydraulic oil not a lubricating oil, so it will stuff ur bearings.

ATF seems to work OK in automatic gearboxes and they got lots of gears and bearings.

The biggest difference with a differential is the screw action of the crown and pinion which really needs an hypoid gear oil.

Sam

Post by **RUFF** » Fri Apr 22, 2005 7:00 pm

bazooked wrote:atf is a hydraulic oil not a lubricating oil, so it will stuff ur bearings.

Atf Fluid is recomended in most Mitsubishi Manual transmisions. And Auto Transmissions also have quite a few bearings.

Post by **bazooked** » Sat Apr 23, 2005 1:40 am

they use to use atf in the ford t5 manuel transmissions, these boxes failed, running that fluid.

Post by **RUFF** » Sat Apr 23, 2005 9:07 pm

News to me i have had a lot to do in the past with T5 manual boxes and have never came across one with ATF Fluid used in it. But it is possible. But i doubt that the ATF fluid was causing bearing problems. As i said before even Auto Gerboxes have bearings and they are usually much more fragile than the bearings in a manual box or Diff centre.

However i prob wouldnt use ATF in a hypoid diff centre if the vehicle is doing any road miles as the hypoid gears wont like it once they get hot.

Post by **mechtech** » Sat Apr 23, 2005 10:16 pm

the main problem i recon with using atf in a diff is that it lacks the EP properties (extream pressure) u get with heli gear oil, stays between teeth better, so you would get increased wear, however after saying that , i've got a vt ss with the 6spd and lsd, the diff i have changed to 75/90 as ls oil was starting to slip, but the 6spd takes ATF DEXIII !!, i geuss it depends how gears are set, so what i think i'm getting at is that it really depends on make/model to what u can get away with, end of the day its safer to stick to spec.

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ATF in LSD

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