R32 Diff Help

[luxing]

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My story starts when i pulled my diff out to shim it, but i found my pinion gear is shagged. So im looking for another diff. My car is a r32 with a gts4 rear subframe its got gtr 6bolt axles etc..

What i would like to know if i buy an r32 gtr diff can i just change the drive shaft yoke from the gtr/gts4 yoke to just the normal 4 bolt??? Is the posible?

I get the feeling my diff is a viscous gts4 it is a 4.1 ratio and the owner before me changed the input flange to the 4bolt one, but never got the preload and backlash right so its destoryed itself?

any help would be mint

[Duncan]

got any pics of the diff centre? If it is 4.1 ratio it is gtr not gts4 (they are 4.4 ratio).

i guess they just got the backlash wrong when changing the cente to do that sort of damage. but a gtr pinion should not cost too much?

how many teeth on the pinion? you can always confirm the ratio by turning the tailshaft and counting the halfshaft turns

[luxing]

got any pics of the diff centre? If it is 4.1 ratio it is gtr not gts4 (they are 4.4 ratio).

i guess they just got the backlash wrong when changing the cente to do that sort of damage. but a gtr pinion should not cost too much?

how many teeth on the pinion? you can always confirm the ratio by turning the tailshaft and counting the halfshaft turns

The diff centre is a viscous im pretty sure, the pinion has 12 and the crown has 49 teeth.

yea i would like to just find a gear set and put my diff back together but not many people sell them seperate.

so what i was thinking ill just buy a gtr diff and change the input flange to the normal 4bolt flange like the one in my pictures, but is this possible??

If i went with the gtr diff id get rid of the viscous...

[blind_elk]

That ratio is from a Stagea (= 4.083:1). GT-R is 9 (pinion) and 37 (crown wheel).

Get a replacement diff (GT-R, GTSt, Stagea, doesn't really matter), and swap the crown wheel onto your existing centre, and the pinion into your existing housing. That way, input and output bits will still match up. If you get a differential specialist to do it, they can set up the backlash correctly at the same time.

BTW, the ratio is generally stamped somewhere on the crown wheel ("teeth on c/w" : "teeth on pinion") - saves a heap of tooth counting!

[luxing]

That ratio is from a Stagea (= 4.083:1). GT-R is 9 (pinion) and 37 (crown wheel).

Get a replacement diff (GT-R, GTSt, Stagea, doesn't really matter), and swap the crown wheel onto your existing centre, and the pinion into your existing housing. That way, input and output bits will still match up. If you get a differential specialist to do it, they can set up the backlash correctly at the same time.

BTW, the ratio is generally stamped somewhere on the crown wheel ("teeth on c/w" : "teeth on pinion") - saves a heap of tooth counting!

Thanks for the info haha i would have never guessed that!!!

The main thing i want to find out is if i get a r32 gtr mech diff can the input flange be swaped with the normal gtst 4 bolt flange? Because if it can it should be a easy bolt in and im better off with the mech diff then the viscous

[Duncan]

no its easier than that. As blind_elk said, just swap the internals of a diff (gtr if you want the mech centre) into your existing housing. that way you know everything bolts up fine.

so all you need is a 2nd hand gtr diff and someone who can assemble it properly.

BTW blind_elk...do you have the numbers for gtst and gts4 as well. this thread is a valuable reference now

[blind_elk]

Duncan, I think the problem luxing is having is whether or not the output shafts will fit into the appropriate location in the diff centre, ie is the shaft of a GTSt the right diameter, length and spline configuration to mesh with the diff centre. And I don't know that, which is why I suggested to just swap the gears themselves. (If I had done the whole assembly swap with my Stagea diff into the R32, I probably would have lost any LSD function, because it seemed that the Stagea had an open rear diff)

BTW blind_elk...do you have the numbers for gtst and gts4 as well. this thread is a valuable reference now

GTS4 is 35:8 = 4.375.

GTSt is 4.363? That would make it 48:11.

[luxing]

All i want to know if i can change the input flanges/yokes. I want to take the 4wd input flange off the gtr diff and just bolt on my gtst input flange(normal 4 bolt)

Will it work are the splines the same? Will the spacing change?

the picture is the gtr input flange