Hilux Diff Centre - JZA70 Torsen Installation

[J0RD0]

so an ln56 diff will be an easier fit? cant remember what year model it was

[TheStitt]

I had similar issue with my RN25 housing and true trak, Not sure how it went together but my diff guy said he threw away my RN25 centre housing and used a later model one when fitting UZS131 3.9's and the true trak

[xlr8_07]

are the shaft splines on the jza70 lsd the same as the hilux 5 stud 2wd axles ?

[madmont]

yes..................

[ooh808]

i have a mechanical lsd for sale

[td42gq]

Just reading the information on removing metal from the pinion to allow for clearence so I thought I'd pass this on.

When fitting ARB airlockers to Hilux diff's in the instruction manual it refers to the need for grinding metal off the top of the pinion to allow clearence of the air locker centre. I have done this in a number of cars, some being good friends of mine and have never seen a pinion brake because of it so I wouldn't be at all concerned about removing 1mm or even 2-3 for that matter as it seems to make next to no difference to the strength of the pinion.

Most competition Hilux's are running reasonable HP with 1uz motors and ARB airlockers and pinion failure is not something that ever seems to be an issue.

Aaron

[cambelt]

4 year thread revive .
Thats strange i have fitted many toyota ARB,s and no pinion mods at all , what model ARB lockers have you fitted.
Dave

[td42gq]

The last 2 I did where on LN106 Hilux front diffs - 4.3 gears and both required pinions to be ground smaller, and the one before that was a Hilux centre but unsure of model as it was done to a diff a mate bought.

The ARB manual for installing air lockers states that it may need to be done. Part number or locker from memory is RD132.

This is the ARB site that states about pinion grinding;

http://www.arb.com.au/resources/pdf/airLockers/5-06.pdf

Obviously its must not be all of them if you have never had to do it....

Aaron

[mick08]

i have a mechanical lsd for sale

How much for the mechanical LSD?

[ooh808]

sorry man, its a detroit, i dug it out and stripped it, way to long ago i sold the mechanical lsd, woops

[Robbos_Toyotas]

i put a ma70 clutch pack lsd and gearset in my yn57 2wd, i had to have the bearing carries turned down to fit hilux bearings as the internal bore was bigger on hilux....as far as fitting it was fine, tight to get in initially but yeah worked perfect...

[cambelt]

Ah RD132 , the new ones , ive only fitted a few and all to OE geared diffs.
Another reason the older RD23 is better but still a reason not to use them .
Check one of the side gears , it has a female circlip groove machined in it and on some applications the axel only engages on 20 mm of axel spline . after 100000klm = chopped out splines.
Dave

[dirtracer]

HI, Im looking at putting a jzx90 torsen carrier into a hilux head,Ive yet to buy the torsen....I do have three different heads that all have different size side bearings is there a special bearing that i will need to get? are the jzx90 /100 torsens still as good as the jza70s ? any help would be great

PS , this is for dirt track racing.

[madmont]

You will need a spacer and the appropriate bearings.

[ooh808]

i have laser cut/cnc 1s, $30