1999 R34 Gtt Diff Questions

[azathoth]

Hey all,

Not sure if this belongs in the drivetrain section or here but I thought because changing diff oil is general maintenance here would work.

I am going to do my gearbox and diff oil and while looking on here for suggestions for what oils to use I came across a few threads saying there was a difference in the LSD's for series 1 and 2 for the R34 GTT's.

I thought they all had helical LSD but a couple of threads I came across said the series 1 had a viscous LSD.

So confused right now as I am finding conflicting information.

I guess I really have 2 questions.

1. Can anyone confirm if a 1999 manual R34 GTT uses a helical or viscous LSD?

2. What would be the best oils to use for each diff?

I was going to use Motul Gear 300 for moth gearbox and diff but I

l'll hold off on buying as much as I was going to if the diff needs a different oil.

Cheers,

Andy

Edited September 13, 2012 by azathoth

[B-Boi34]

A series 1 GTT has a Viscous diff. Only the series 2 manuals came out with the Helical diff's.

The series 2 auto's also used a Viscous diff.

From memory i used Nulon 85W-140 limited slip diff oil in my series 1 last year.

Edited September 13, 2012 by B-Boi34

[azathoth]

Thanks heaps. Appreciate it.

That explains why my diff is so crap

[Turbosingh]

how to tell the difference between viscous an helical?

[xntrq]

how to tell the difference between viscous an helical?

I've been told that if you turn one wheel, the other should turn in the opposite direction (shits fkd up I know). Haven't tried it for myself though.

[B-Boi34]

From memory the Helical will act like an open diff, so if you turn one wheel the other will turn the opposite direction. If you turn the wheels on a viscous diff they should turn the same direction. I also have not tested this theory.

The other way is check the code on the diff, a viscous is a R200V I think

[mad082]

I have tested that theory and from memory it was right, but this was about 5 years ago now.

[cowdy]

We deal with this at work all the time when adjusting hand breaks. It is correct LSD is spin one they both go the same way.