M Factory LSD install

[IanB69]

Hi all from down under, I'm having an M Factory LSD installed in my JC5 gearbox. Unfortunately I wasn't made aware of the machining required to change over the crown wheel (maybe not the correct terminology for in a fwd box). The gearbox guy wants me to get the machining done but finding someone that has done one before is a bit difficult. Can anyone help with any details / pic of the machining required and how the crown wheel is held on the LSD? It appears it will just be an interference fit. Cheers.

 

[JamesBryan]

Not sure on the machining, but @NorthloopCup will know.

But i do know when fitting M Factory diffs, the crownwheel is to be tig welded once pressed onto the diff.

 

[JamesBryan]

Although looking at this, it looks like it is like the Quaife where you have slots machined into the CW to accept ball bearings that sit in the recess

 

[IanB69]

Although looking at this, it looks like it is like the Quaife where you have slots machined into the CW to accept ball bearings that sit in the recess

View attachment 1578626

The M factory does have 2 spots to maybe put ball bearings. I do like the idea of Tig as it definitely won't slip.

 

[JamesBryan]

The M factory does have 2 spots to maybe put ball bearings. I do like the idea of Tig as it definitely won't slip.

I believe Pure Motorsport over here used to weld them, but seeing those spots now, maybe they have changed

 

[NorthloopCup]

You’ve got 2 choices:

Machine 2 half moons 180 degrees apart in the crownwheel.

Or

Heat the crownwheel up and drop it on the diff. Couple of 1 inch long welds to keep it secure - job done.

I’ve done both ways.