mcflyz28

How long after initial break in before you changed out the gear lube. Also after the initial is it ok to use synthetic or stick with normal dino oil

03 BUSA

iTrader: (25)

You can change it at 500 miles if you are worried about it. As far as synthetic I would run it then. All parts should mate well before 500 miles.

litemup02

iTrader: (39)

I remember reading that the warranty is void if you use synthetic in a moser 9in

03 BUSA

iTrader: (25)

That is interesting info. I really don't understand why that would matter. I am getting ready for a 9 inch so I will have to research a little farther I guess.

mcflyz28

Guess i'm calling Moser next week

35th SS

iTrader: (2)

do not use synthetic oil in there.moser will tell you when you call.reg. gear oil 80w-90.

LS1>girlfriend

iTrader: (19)

the gear oil you will use depends on which differential you have. you must abide by the factory recommendations or your diff wont function properly.

its late, im drunk and dont care about spelling

ssvert99

iTrader: (26)

definetly do not run any synthetics before 500 miles. i recommend regular old gl5 rated 80/90 gear oil through the break-in and up to the 500 point. addative will be needed only if you are using a clutch or cone style posi unit.

bigdsz

iTrader: (1)

I use Walmart synthetic 80-90-140 in my Moser with a Detroit Locker. It loves those 5,000rpm dumps.

red_ryderSS

iTrader: (1)

What do you guys recommend for a moser 9inch with trutrac? Should have mine in a couple weeks, interested in to what everyone says on this topic.

litemup02

iTrader: (39)

Just a 80w90 i went with valvoline. Also have a truetrac

35th SS

iTrader: (2)

I run gl5 80-90 reg.moser 9in.HD posi 4.57 gears on the blk car and same on the 35th with a currie 9in. trac. locker 3.73 gears.like said do not use syn. oil in there.