Hi all,
I'm about to get an r31 sillo diff and was wondering the dimensions of the work that needs to be done. Also if any Adelaide members know of somewhere to get it done as I live in Alice Springs but am getting it from there and have ways to get it to shops could you let me know or even better let me know you can do it
Thanks,
Philip

Hi Phillip,
If you cut down the long tube to suit the short axle & cut the long axle to suit the short tube, you'll end up with the correct width.

Presuming you're paying someone to shorten.....
I'd cut all the brackets / mountings of the diff beforehand.... Will save you $$$.

Have fun

Hey Philip,

The guys on Ausrotary sing praises about Rodtech 82623230 190-192H HAMPSTEAD RD, CLEARVIEW.

I'll be giving him a call soon to do a bluebird diff conversion for my 1000.

Quote:

correct width for what? that would mean you are only shortening the diff by 50mm, skyline diffs are more than 50mm bigger than a 1200 diff
and the least you can shorten a skyline axel is something like 110mm, unless you get custom made axels or have some freak axel that doesnt go undersized
im cutting the long tube down 50mm and the short one down 85mm, swapping axels and getting the long one cut down 135mm and the diff is still going to be about 20mm wider than standard 1200 size

Thanks Pigdog I thought it surely couldn't be that simple. Could people that have had the work done or done the work let me know of what they did. I need to know exactly what I'm talking about.
Thanks Again,
Philip

That's how it was explained to me by the guy who shortened my diff.....

I checked - He only cut 1 axle, but cut both tubes. but they've both been turned so I figured that's why he cut the 2nd one.
So maybe it wasn't as easy as all that.. Can't think why he'd bull$hit me though.

Anyway - Apologies for the bum steer.

Yeah thanks anyway Coops. Any other recommendations for how to modify it or a company to do it?
Thanks,
Philip

not really something that should be done yourself as the axel tubes need to be heated and pressed out once the 2 welds have been drilled out

but i would also recommend cutting the mounts off as this does take a fair bit of the diff shops time, and your money
and is easy enough to do yourself with an angle grinder

If someone figures out a stronger diff for a 1000 please let me know
I am having some torque based issues

Whats the STD length of these things ?

standard length of an R31 diff is around 1450mm from axel face to face