Skyline diff internals in s13 pumpkin

[fikemoo]

Hi guys ive been searching pretty much all evening and there is plenty of information about swapping diffs between nissan but im yet to find an answer for specifically what id like to do.
 i got a skyline auto diff 4.3 ratio but it was a non abs pumpkin, anyway i fitted it to my car (s13) and it was slightly to short which was to be expected as i have a abs car so it has abs prop shaft. i have my original s13 abs diff sitting in the garage and id like to refurb this then transfer all the skyline internals in to it so the shafts/crown/pinion/lsd is this possible? as i dont like the idea of having the non abs diff on the car as i have heard it puts the center joint of the prop shaft under more stress due to the prop being pulled closer to fill the void created by the shorter diff

 

mike

[GTSBoy]

I am slightly horrified by the idea that you "stretched" your tailshaft by ~20mm to make it connect to the diff input flange.  I wouldn't have done that.  I wouldn't have done it and then parked the car, let alone done it and then driven the bloody thing.

You cannot fit the long pinion from an ABS diff into the shorter housings and vice versa.  So you can't have the 4.3 gears in the S13 housing.  You would be better off buying the back half of a tailshaft off a car with the same diff housing that you're using.  5 second job to change.

[fikemoo]

I completely agree with you it was a not ideal situation and the car has been off the road since while I did other things to the engine and wiring. What was strange is the gap was only about 5mm. The guy did change the input flange of the diff to a different one so im not sure if this made a difference or what it even came off. Hence why I'm trying to get rid of the skyline pumpkin and revert back to my original diff as I know it fitted the car perfectly

[GTSBoy]

Well, give up the idea unless you can get the CW&P set from a diff with the same type of housing as you intend to use.

[fikemoo]

Well atleast I know my options now. Either find a crown and pinion from a auto r32 abs diff and put it in my s13 diff or sell my diff and buy another r32 auto diff which is abs. Thankyou for the help

[GTSBoy]

Simply getting the back half of your tailshaft lengthened would be far easier.

[fikemoo]

I'm a bit worried about him changing the nose of the diff. As I have no idea what nose/flange is on it now and if that matters or not

[GTSBoy]

I'm not sure I follow your problem.  All the Skyline/Silvia diffs use the same flange on the front of the diff to connect to the rear uni joint on the tailshaft.  Except for GTRs, which use a CV joint type flange.

As I have said a couple of times.....either buy a suitable length rear half of tailshaft to suit (there has to be a combination to suit your car) of get your existing rear half cut, lengthened, welded and straightened/balanced.  The latter is routinely done for the front half (albeit shortening) whenever an RB25 is dropped into an S chassis car or an R32.

[fikemoo]

Ok now that makes sense I didn't know they all used the same input flange across the s and r chassis (apart from gtr as you said) all sorted then I just need a non abs rear half of prop to match the non abs flange.

Thanks again