My hilux diff shorted with 4.11 centre new mounts and hand brake assemely modded to suit my coupe just cost me 1800 and they supplied the diff i thought that was an ok price

The quote for my hilux diff is about 1900 all up.
Most of this cost is the LSD.
Housings are cheeeeeap, but quality axle and housing shortening is not.

just so that everyone is understanding, these prices are for one axle only, so $180 x 2 = $360 if you happen to be shortening two axles... plus shortening the housing etc.

Realistically be the time you shorten two (if required) axles, the housing at both ends (if required) and have the mounts removed & rebuilt to suit the new car, you're looking at around $1k.

If axle mods are much more expensive, bear in mind you can get a pair of billet axles made for a reasonable price.

r31 axles being forged and hardened allows the hardening depth
to successfully allow re-splining.

if rolling a spline or buying billet axles was as cheap then all diff shops would be doing it aswell. i understand the engineeering with stress in the materials but again i also believe that if you cut a new spline and heat treat it then this would be just as good. just a thought

coxsteve, sure what you say is true, and it will result in a really strong diff...but until i see a 1200 break an R31 axle that is done this way i'll have to stay a firm believer that there is nothing wrong with doing like this

it is how alot of diff shops do it and its only if they get billet axles that it is done differently...but even then i'd assume the spline is still cut on not rolled

ive never seen or heard of an axle failing coz the spline has been stripped off it, its always axles actually snapping. so the thread rolling vs cutting cant really be that much different in the real world

thats not bad

Make sure if you ever shorten a diff it is always best to not machine and respline axles at the factory the spline is rolled compressing and strengthening the metal and it is then correctly heat treated afterwards,they certainly are not doing it properly for even $250.00
You can shorten a diff by using the short axle trick but do not reverse the rotation of the axle from it's original fitted position and buy a new genuine replacement for the other one,that way you will not encounter stress reversal which will cause a failure and you will have 2 rolled spline heat trteated bulletproof axles.

CA_1200_project, you only shorten one as you use the original short axle as the new long axle then get the original long axle shortened to take up the rest

so in other words dattodude, you got ripped off

one axle got quoted $125