Changing diff gear in an m75

[gtrboyy]

If you want the parts & labour to come with warranty better to let them supply & install.

Then sure as fark you can bring that biatch back in if any issues lol

 

[Deuce]

Same with mine.

The 3.46's I had in the M80 before were factory as it was from a VX and they were quiet as, but I think some of the aftermarket gears just aren't as refined or maybe they are built with harder steel/teeth patterns to handle performance applications while sacrificing NVH.

Mine were 2nd hand used gears. So it was a shot in the dark to get the mesh right.
Guess I almost hit it if it's silent on accel aye.

 

[Grimes]

Were you contemplating doing the whole job yourself, or just wondering about whether to supply someone the gears or not?

 

[allan01]

Thanks for the feed back blokes, it is a solid axle diff and is your topical m78 housing but m75 internals is what I was told, we just came across some 3.9 pintara diff gears brand new apparently they are m75 I hear

 

[someguy360]

Pintara used to be the go to for 3.9's before there was a strong aftermarket scene.

I remember raiding pintara's and R31 skylines back in the VN days from the local wreckers when there were plenty around.

 

[gtrboyy]

Not 100% but iirc 3.89 gears are noisey ones...all I know is my lc gtr got the gears with harmonic issues fml.

Ne & my cousin used to go Woy Woy tip to take b/w diff gears or diffs out of wrecks...ironically never had an issue except damn lc gtr diff conversion that I paid diff shop to supply & fit 3.89 gears

 

[Immortality]

I just noticed the other day that the 3.45 gears out of my old VN had one edge of each tooth on the pinion relieved with a die grinder. That was a used set of gears that I had fitted by a local diff guy and those were not noisy at all, not even on overrun.

 

[Deuce]

I just noticed the other day that the 3.45 gears out of my old VN had one edge of each tooth on the pinion relieved with a die grinder. That was a used set of gears that I had fitted by a local diff guy and those were not noisy at all, not even on overrun.

Interesting.
Photos?

 

[Immortality]

I'll grab one later.

 

[Immortality]