Diffs, FAQ

[smurf]

gday guys,
Just bought a rebuilt diff from a vr v8 sedan to bolt straight into my vr v8 ute.
It seems the shock mounts are different, and i really don't want to swap centres n **** like that, was hoping i could diy the whole thing, and changing gears and centres out seems a bit beyond me.
Is there anyway to modify the sedan diff to fit into the ute?
Has anyone attempted it or seen it done?
cheers,
-smurf

 

[psivyv6]

iv got a vy v6 with an lsd, but it doesnt seem to work very well, do they have to be re tightened or re shimmed often?
i also got told u can use a different diff oil to make it work better is this true?
cheers

 

[Immortality]

the factory diff is ok but needs a bit of attention if you want it to survive. from the factory the clearances are to big and the factory spring is weak. get the diff shimmed to tighten the clearances and fitted with a decent spring at it will live a lot longer. as long as your not doing lot of circle work with it it'll be fine. if you wanna do circle work get a minispool.

as for the oil, LSD's not the correct oil used or the diff will kill itself quick. having said that, in my opinion LSD diffs need regualr oil changes. the LSD works by way of friction created by the spring on 2 cones inside the carrier. it's a steel on steel arrangement. as the cones slip to allow the wheels to turn at different speeds when you corner there is going to be minute bits of steel wearing of the cone surfaces. this contaminates the oil. fine steel in the oil is going to increase wear so more contamination in the oil etc. it's a viscious circle really.

the LSD in my car originally came from a VP BT1. had about 100clicks on it when my brother in law bought it. he had it tightened after a minor accident. i got it after the car was written off and it had 240+clicks on it then and i know it had a hard life. i had it serviced again when it was fitted to my car and there was still plenty of meat on the surface of the cones. i drive it hard, get a bit of sideways action going and maybe some traight line stuff but don't do cirles with it. the inlaws did plenty of cicles though

 

[95commy]

95 commy Diff parts non irs

Hi

I have a non irs diff the right hand axle shaft has been bent , i have brought a new shaft but dont know what else i will need to buy .ie bushes/bearings and how to do it.
Can someone please help? Pics of parts would be great!

 

[VN_chris]

Ive got an LSD center out of a VR ute non IRS. i want to put it into my VN execuitive sedan. is it just a straight swap?

 

[crewsy]

Ive got an LSD center out of a VR ute non IRS. i want to put it into my VN execuitive sedan. is it just a straight swap?

they both run the same diff housings so yes it should fit

 

[VN_chris]

when swaping centers is it ok to use the crown wheel that came out of the car the center came out of or is a good idea to keep the crown wheel that was on the center being replaced and the car has been running with?

 

[crewsy]

when swaping centers is it ok to use the crown wheel that came out of the car the center came out of or is a good idea to keep the crown wheel that was on the center being replaced and the car has been running with?

im no expert but IMO i would keep the same crown wheel with the same pinion gear as they would have been treated differently and would have different wear on them so they may not work smoothly together if swapped. chuck the set in that looks like it has less wear on it

 

[Immortality]

when swaping centers is it ok to use the crown wheel that came out of the car the center came out of or is a good idea to keep the crown wheel that was on the center being replaced and the car has been running with?

nope. keep the crown wheel and pinion as a set. so swap you crown wheel onto the center thats going into your diff

 

[VN_chris]

my auto teacher advised me to have it done by a pro. what can i expect for reconditioning and installation at a diff specialist?