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Commodore vs skyline diff

Started by _bangbang_ , Oct 03 2011 08:26 PM

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42 replies to this topic

#26 _rorym_

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Posted 17 October 2011 - 09:11 PM

Screw a big PK screw in the rear connetion on the master and pull it out with a claw hammer....thought I said that?
R

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#27 dattoman

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Posted 17 October 2011 - 09:22 PM

The olive is in the master cylinder outlet for the rear brakes... the big thread one
This is where the residual valve hides... looks like a ducks bull... made of rubber... attched to a spring... discard both.

Leave the valve alone till the cars driven and if theres a rear wheel locking issue where the rears are coming on before the fronts... then its prop valve time

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#28 _rorym_

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Posted 17 October 2011 - 09:36 PM

I didnt upgrade the write up but I eventually flicked the prop valve in the bay completely and fitted an adjustable Tilton bias twidler...about $70 off memory...bit of trial and testing to get it right but once it was set I left it.
R

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#29 _rorym_

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Posted 17 October 2011 - 09:47 PM

Stick a PK screw in that sucker and pull it out!
R

Lines 002.jpg 572K 2 downloads

Edited by rorym, 17 October 2011 - 09:48 PM.

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#30 _rorym_

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Posted 17 October 2011 - 09:58 PM

After I fitted the Commodore booster, you can see the Tilton bias adjuster just below the Falcon master cylinder.

Z1 002.jpg 594.59K 3 downloads

Edited by rorym, 17 October 2011 - 09:59 PM.

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#31 _bangbang_

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Posted 18 October 2011 - 04:28 PM

Thanks heaps guys.. lovely work

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#32 _rorym_

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Posted 18 October 2011 - 08:21 PM

You are welcome!...Thats just about 3 years of trial and error and expense to make your life easier...Hahahahaah!
R

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#33 _bangbang_

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Posted 23 November 2011 - 09:41 AM

Hey again peoples..
I have finally got the commodore 3.08 centre into the skyline housing, whilst the axles were getting drilled for torana stud pattern I got them to fit new wheel bearings.

I went to fit the axles last night, however the longer axle doesn't go all the way into the centre.. it feels like the splines are lining up ok, however when the axle is pushed all the way home, there is still around 40mm left to go in. The bearing is definately pushed all the way down to the shoulder. Could the axle perhaps be crashing against something inside the centre?

Many thanks

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#34 rodomo

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Posted 23 November 2011 - 09:45 AM

Are the axles the same length left to right?

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#35 76lxhatch

That was easy!

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Posted 23 November 2011 - 07:52 PM

No not quite, different lengths as with Commodore but not as much difference

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#36 rodomo

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Posted 23 November 2011 - 08:45 PM

What I'm getting at is he might have the long one in the short hole and vica verca?

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#37 _bangbang_

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Posted 23 November 2011 - 08:47 PM

Found the problem.. I had a whoopsy with the bearing on that axle! All fixed up now.. thanks anyways!!

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#38 76lxhatch

That was easy!

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Posted 24 November 2011 - 05:40 AM

What I'm getting at is he might have the long one in the short hole and vica verca?

Yeah I thought you wanted confirmation but maybe you were just being polite...

Out of interest what was the issue with the bearing? My first (failed) attempt at getting one of these built was using a supposed professional diff builder who fed me a line about the bearing setup on the R31 diff being oddball and expensive (among other things), curious to know if there is any truth to it.

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#39 _bangbang_

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Posted 24 November 2011 - 09:06 AM

Hehe, well I accidentally tapped the wrong bearing cap into the housing.. therefore the bearing wasn't able to seat properly! Whoops. And many thanks again 76lxhatch for all the help

(and to the others that helped out!!). The diff is now all bolted up and in the car

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#40 _A9XOSS_

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Posted 17 December 2011 - 08:03 PM

this thread is awesome, but :useless:

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#41 _NVMYLH_

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Posted 25 March 2012 - 08:23 AM

Sorry to dig up an old thread guys but some good info in here at the least!
Does anyone know how much power these diffs can handle? My next project is going to be an LH/LX with a 2JZGTE engine (manual), they can easily be made to put out 300RWKW.. but can one of these R31 diffs handle that?
The other reason I am looking into an R31 diff is the weight, I remember somewhere that they are much lighter than a 9" (but is this an indicator of their strength...?) Cheers!