Wat happened to the SKYLINE Differential Swap

[jamesmost]

Any info - me gonna need a differential soon; after i rebuild my axels. I mean i replaced everything else on my car.

[Q45CALIBER]

Any info - me gonna need a differential soon; after i rebuild my axels. I mean i replaced everything else on my car.

J your going real hard on the Q. I respect your ganster. Going to have to step my game up eventually.

[irax]

actualy just buy a R200 diff, one for a 240sx or NA 300zx should work.. infact take the R&P from the 240sx as well

[elwesso]

James im going to call one of my contacts today and get some more info... I will post up after i speak with them.

[RobertsnewQ]

It works BUT I gave up on it because they only come with 2 ABS rings, so can't use them on early G50s without TCS (without swapping axles or flanges).

You need an R33 GT-R rear diff. Ratio is like 4.08 or something.

THe only part that I don't know about is the driveshaft flange. You may or may not have to swap it over.
Modified by RobertsnewQ at 1:37 PM 3/14/2006

[RobertsnewQ]

actualy just buy a R200 diff, one for a 240sx or NA 300zx should work.. infact take the R&P from the 240sx as well

This is NOT true. The G50 uses a variant of the R200 with different (larger) differential side bearings, and different axle flange bolt pattern from most other R200s.

Just to repeat info that's already out there, you cannot use the G50 diff with the 240/300 r&p because the ring gear flange on the diff is spaced too far from the pinion.

You cannot use the side flanges from the G50 diff with the other R200 rears because the flanges are different.

The only one that will probably work is the Skyline R33 GT-R ONLY, no other skyline diff will work. This one has the 6-bolt side flanges the same as the Q, but the lower 4.08 ratio.

I don't have the $ or time to mess with it right now, but I will be doing this swap at some point. I'm just hoping I can swap the non-TCS flanges over to the R33 diff.

[elwesso]

The R34 GTR has the 6 bolt/4.08 as well... And you can put in a TCS diff into a non TCS car.. Greg swapped this diff into his 95 Q without TCS.

[jamesmost]

The R34 GTR has the 6 bolt/4.08 as well... And you can put in a TCS diff into a non TCS car.. Greg swapped this diff into his 95 Q without TCS.

So greg has this running in his car now??

You need an R33 GT-R - is this the case Both of these are plug and play ??

[AZhitman]

Correct.

Good luck finding one though!

[jamesmost]

Correct.

Good luck finding one though!

What r they selling for if found ?? can u check ur source ??

[elwesso]

Theyre hard to come by and generally cost around $250.. check with Roberts source.

[AZhitman]

Errr, I paid approx TWICE that.

[jamesmost]

Theyre hard to come by and generally cost around $250.. check with Roberts source.

droppedhim an e-mail

[jamesmost]

Errr, I paid approx TWICE that.

gotcha

[RobertsnewQ]

I've seen one on ebay, and that guy I mentioned comes across them every few months.

You could also contact onetongarage or one of the other guys that imports JDM stuff to get one for you. I was budgeting around $400 for one.

Greg: Did you have to swap the driveshaft flange? Is that how you got the ABS working?

[irax]

really? cool now I know, I just went by the nissan rule of R200 diff. I cant wait to pick up my Q :-D I get it the end of next month, but unfortunatly i only get to play with it for a week befor it goes strait to Modified Inc. in L.A. then over to E.F Madness then to Shogunstyle performance.. hahaha im excited...

[rsiwicki]

Now this is a scary thought.....

"James with a 4.08"

Nobody will be safe on the roads ever again in the NYC area!!!!

I hope this works out for you guys as it would be a fun, somewhat inexpensive, and easy modification for you guys. I like my 4.08 a lot as I broke traction easily which is fun yet expensive at the same time.

[jamesmost]

Now this is a scary thought.....

"James with a 4.08"

Nobody will be safe on the roads ever again in the NYC area!!!!

I hope this works out for you guys as it would be a fun, somewhat inexpensive, and easy modification for you guys. I like my 4.08 a lot as I broke traction easily which is fun yet expensive at the same time.

Rob - not safe already bty the gps said 161

[AZhitman]

Flange swap was required, but only because they didn't match.

A competent shop MUST DO the flange swap. DO NOT ATTEMPT TO SWAP IT YOURSELF!!!!

The depth to which you tighten the flange mounting nut sets the pinion depth and WILL cause the diff to whine or bind if not perfect.

It has nothing to do with the ABS function though - ABS sensor is not on the diff on my Q.

[jamesmost]

Flange swap was required, but only because they didn't match.

A competent shop MUST DO the flange swap. DO NOT ATTEMPT TO SWAP IT YOURSELF!!!!

The depth to which you tighten the flange mounting nut sets the pinion depth and WILL cause the diff to whine or bind if not perfect.

It has nothing to do with the ABS function though - ABS sensor is not on the diff on my Q.

sounds good - is it a TCS rear??

[AZhitman]

Ummm, no, it's an R33 rear.

[elwesso]

Flange swap was required, but only because they didn't match.

A competent shop MUST DO the flange swap. DO NOT ATTEMPT TO SWAP IT YOURSELF!!!!

The depth to which you tighten the flange mounting nut sets the pinion depth and WILL cause the diff to whine or bind if not perfect.

It has nothing to do with the ABS function though - ABS sensor is not on the diff on my Q.

wait, so you did have to change the driveshaft companion flange!!?

[jamesmost]

Ummm, no, it's an R33 rear.

shizzo yo , understand that, and it may have been mentioned, and does it have tcs (traction control?? not ur car but thr R33 rear.)

[AZhitman]

James, sorry, I'm not getting the slang.

TCS is not a rear diff issue.

The diff has stability control sensors, but those are irrelevant.

Wes, almost all Nissan cars have a different input flange. Not a big deal.

[elwesso]

Flange swap was required, but only because they didn't match.

A competent shop MUST DO the flange swap. DO NOT ATTEMPT TO SWAP IT YOURSELF!!!!

The depth to which you tighten the flange mounting nut sets the pinion depth and WILL cause the diff to whine or bind if not perfect.

It has nothing to do with the ABS function though - ABS sensor is not on the diff on my Q.

I was looking in the FSM and you have to remove the front flange to replac ethe oil seal, and there is nothing about measuring and so on.... im not doubting you, but the FSM makes no mention on this, and if it really was crucial, id think theyd mention it.

The snesors on the output flanges (axles) can be used with TCS equipped Q

[AZhitman]

No need to doubt - I've swapped 15 Nissan diffs, and it's a problem.

There's a range of adjustment - most folks get lucky.

[elwesso]

wouldnt you say though, if you measured the threads that itd be close?

Again, im not doubting, i just like to beat around the bush sometimes

[RobertsnewQ]

Wes - IF you remove the original flange and replace it you don't have a problem.

THe problem comes when you mix & match. The tolerances can stack up on the wrong side and cause either a loose pinion bearing (which kills the hypoid gear mesh) or a tight pinion (which will wear out the pinion bearing really fast).

All diffs are like this. At least the R200 uses shims and not a crush sleeve (like the R230). Those suck.

The right way to do it is measure the pinion gear preload with a sensitive torque wrench, and then assemble the new flange onto the diff with a shim that results in the same torque reading.

The problem with the whole thing is that you have to remove the pinion bearing inner race & rollers to change the shim.

This sucks because it means disturbing the mesh of the r&p, which sucks because you get to reset them when you put it all back together.

which sucks because you have to set used gears up with the same mesh that they've been running in for the last XXX000 miles.

If you mess up any of these steps you get a noisy diff. Sometimes even if you do everything right you get a noisy diff.

[irax]

wouldnt you say though, if you measured the threads that itd be close?

Again, im not doubting, i just like to beat around the bush sometimes

so the only diff that can be swapped in is the R33 diff? and the only reason why the 240/300 R200 R&P wont fit is because of the spacing for the pinion gear?

[RobertsnewQ]

yes and yes.

RSwicki had a custom spacer made to place the r&p in the proper relationship, and then he used a stock Z32 NA r&p inside the G50 hogshead (diff housing).