52172

iTrader: (2)

I am pretty sure the synthetic is not ok with clutch type ltd slip, but the tru-trac has no clutches and therefor does not require ltd slip additive. Can I fill her up with a synthetic gear oil? Thanks Oh I did a search and some say no do not use synthetic and another said they spoke with detroit and they said it was ok since the tru trac has no clutches??? I'm confused.

WAHUSKER

iTrader: (4)

I'm going to use it in mine AFTER it's broken in. And I ran it in my clutch type for 3 yrs & it worked fine.

v8juice

iTrader: (9)

The paperwork that came with mine says no synthetic or it voids the warranty

52172

iTrader: (2)

well if your right thats all I need to know. Other people agree? I was gonna contact Detroit.

getusum

iTrader: (42)

Moser will tell you this directly as well as Eaton.......Use non synthetic

52172

iTrader: (2)

Does anyone know the reasoning behind this? I was under the impression you could always swap regular oil of any kind with synthetic? If the Tru Trac has no clutches why can't you use sythetic do they want you to wear out the rear end sooner than later so you have to puchase another just like the factory recommends oil changes at 8000 mile intervals or so with regular oil? So they can make more money in the long run?

EPP

iTrader: (22)

Moser will not warranty it if synthetic oil is used, just in case you are talking about a Moser rear. Bob

GregWS6&z28

iTrader: (8)

why are people so hard pressed to put synthetic in the rear? is it so they can say they have synthetic all the way around?

WAHUSKER

iTrader: (4)

Really? They know I use 85/140 Royal Purple & didn't say anything about it....maybe I should ask.

The only difference we see when we tear stuff down is NO wear when we use RP. The axle bearings didn't wear out, the silk screen was still on the clutch packs, my motor stayed together during 50 miles of 340* oil temps @ 140 mph (water pump wire broke). Personally, I'll never use dyno oils again in the hot rod except to break things in.

alamantia

iTrader: (10)

synthetic will not void any warrenty in a locker

https://ls1tech.com/forums/showthrea...812&highlight=

AgreSSer SS

I think the reasoning for the use of conventional oil in the differential as opposed to synthetic is that conventional oil "climbs" up the gears better as they spin.

Has anyone seen that hand cranked display that lucas oil uses in the parts stores to show how there oil climbs the geartrain as it is in motion?

This may be the reason companys don't warranty due to poor gear lube supply.

Correct me if Im off base on this guys.

roy

Just think how fast a differential turns and the fact that part of the ring gear and pinion are bathed in oil.