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My diff is starting to open wheel, and I am looking at my options. As the car already makes a lot more power than the standard diff was meant to handel, I was wondering if it is worthwhile fixing it, or replacing it with a GTR diff?

My questions are :

1. are they interchangable?

2. can I just change the center or should I also change the 1/2 shafts.

3. are r32 and r33 GTR diffs the same? (or do I have to find one from a 33)

4. are the GTR diffs any stronger (I would have thought so but I may be wrong)

Any advise sought, but I would love to here frome someone who has done this already. I realise I could go for an aftermarket diff, but the car isnt driven thet hard often enough for me to justify the $2000 (installed) price tags I have been given.

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https://www.sau.com.au/forums/topic/84196-gtr-diff-in-a-gtst/
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I can only answer question 4 for you...they are stronger..and good..I have a quote here that says .."so good are the stock 1.5 way GTR differentials that you would not change them for virtually any purpose, Plenty of cars have run 9 second passes on them which is a testament to how well they work". How ever I was thinking will it really work out that much cheaper than a new aftermarket one? Not too sure on the prices of the actuall diff but the labour might make it almost the same cost if it is somthing that hasnt been done too often before! Any way best of luck with it and let us know if it works out!

I believe they have a different spline in the centre, so will need to have the shafts as well as they are a six bolt fitting off the diff instead of five bolt in GTS25t.

I don't believe they are a 1.5 diff in the true sense but are a much stronger viscous diff. I could be wrong but mine does not drive like that. It will scrub up on tight turns in the car park.

I also believe the housings are different but centres interchangable.

I reckon you need an answer to q2 before you decide to replace the whole thing.

"2. can I just change the center or should I also change the 1/2 shafts."

Sorry I'm not sure if the 32 gtr one fits tho. When the centre in my 33 gave up I put a mechanical centre in.

I have been offered a GTR rear end for a few hundred dollars.

The $1100 Kaaz option is the price I was quoted for the center only, then I neeed to install it, plus bearings, plus plus, pluss (final price between 1500-2500 depending upon what they find) Hence the interest in a n R32 GTR diff option.

OK then, sounds like the GTR option is a good one. What I am left unsure of is if a GTR diff from an R32 (full set disk to disk), can  be grafted into my 33GTSt?

I don't see why it wouldn't, i put one straight into a 200SX, there was only one mounting bracket difference since you have a skyline it should go straight in :P

I have been offered a GTR rear end for a few hundred dollars.

The $1100 Kaaz option is the price I was quoted for the center only, then I neeed to install it, plus bearings, plus plus, pluss (final price between 1500-2500 depending upon what they find) Hence the interest in a n R32 GTR diff option.

installing the gtr diff will be similar cost to installing the kaaz centre (maybe more hassel if tailshaft/driveshafts doesn't bolt up to the gtr housing)

if you don't want to crack open the diff housing, maybe look for a second hand 2 way (eg nismo, cusco, or kaaz) which comes with housing.

But seriously changing centres isn't very hard, main time consuming part of changing diff is removing / reinstalling the diff housing from the car.

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