The everything cd009 swap thread.

[hanzbrady]

Originally Posted by R3b

Though im not CD swap yet, I feel this. I daily drive my hatch with built ka-t but driving more and more lately I cant stand the gearing and I have j30. Im about to swap to 180sx vsld since my diff has so much play im dreading the install since its an even higher final drive. Gonna be a temp thing till I do the q45 swap because cruising on the highway above 3k in regular traffic is nuts...
Plus I want to do a road trip from south fl to tail of dragons maybe this year.

So instead of going through 2 or 3 diffs why not just pony up and get a Z diff and axles with the lower ratio that you're after off the bat?

[RalliartRsX]

Originally Posted by hanzbrady

So instead of going through 2 or 3 diffs why not just pony up and get a Z diff and axles with the lower ratio that you're after off the bat?

But why would you do this?? The Q45 is available in 3.69 and 3.54 ratios to cover those basis without requiring diff bushings or having to modify the subframe for it to fit.

Which leaves me with these few questions

1) Does a standard R200 diff (say ATS carbon or even a HLSD) swap into the Q45 diff housing?? Its obvious the pinion shaft bearings are actually bigger/longer/etc in the Q45 vs the standard R200 (Z32, 240sx, J30) diff.

2) Can a standard R200 diff (again, say S15 HLSD or ATS carbon) swap into a 350Z R200?? I suspect the answer is yes as a direct swap??

[beems240sx]

Originally Posted by RalliartRsX

But why would you do this?? The Q45 is available in 3.69 and 3.54 ratios to cover those basis without requiring diff bushings or having to modify the subframe for it to fit.

Which leaves me with these few questions

1) Does a standard R200 diff (say ATS carbon or even a HLSD) swap into the Q45 diff housing?? Its obvious the pinion shaft bearings are actually bigger/longer/etc in the Q45 vs the standard R200 (Z32, 240sx, J30) diff.

2) Can a standard R200 diff (again, say S15 HLSD or ATS carbon) swap into a 350Z R200?? I suspect the answer is yes as a direct swap??

You sound like a Miata owner. I have a mystery diff in mine and at 80mph im about 4K rpm and the car creeps up in temp running like this for a while. I will be going 350z diff and axles mainly because the axles are stronger and more readily available. I rarely drive on the highway, around town the short gear ratio is super fun

[hanzbrady]

Originally Posted by RalliartRsX

But why would you do this?? The Q45 is available in 3.69 and 3.54 ratios to cover those basis without requiring diff bushings or having to modify the subframe for it to fit.

Which leaves me with these few questions

1) Does a standard R200 diff (say ATS carbon or even a HLSD) swap into the Q45 diff housing?? Its obvious the pinion shaft bearings are actually bigger/longer/etc in the Q45 vs the standard R200 (Z32, 240sx, J30) diff.

2) Can a standard R200 diff (again, say S15 HLSD or ATS carbon) swap into a 350Z R200?? I suspect the answer is yes as a direct swap??

Because the Q45 diff is 25 years old, annoying to source, requires a Z32 axle or some machining know how, and I've seen them explode.

Also for what it's worth if I played the S chassis game again I'd do the 8.8 IRS setup and call it a day personally

[TheRealSy90]

Originally Posted by RalliartRsX

But why would you do this?? The Q45 is available in 3.69 and 3.54 ratios to cover those basis without requiring diff bushings or having to modify the subframe for it to fit.?

Because there aren't any good aftermarket LSD options for the Q45 differential.

Also, I have a feeling that the Z33 diff swap bushings for the s14 subframe may leave the differential tilted forwards when installed, but just hearsay I haven't confirmed it.

[RalliartRsX]

Originally Posted by TheRealSy90

Because there aren't any good aftermarket LSD options for the Q45 differential.

Also, I have a feeling that the Z33 diff swap bushings for the s14 subframe may leave the differential tilted forwards when installed, but just hearsay I haven't confirmed it.

If any of the R200V (S, J, Q, etc) bolts up to Q45 ring gear, how is it there are no LSD options for the Q45?? The pumpkin is what determines axles, so essentially that is a non issue.

In terms of your second point. Do you mean the front tilted up or down?? Not sure how you can tilt forward. The front two bolt points are wider by .5". The rear bolts directly into the rear subframe via either the single bolt or the twin bolt cover (which covers are not swappable with the standard R200 and R200V carriers due to the diff housing being .5" wider), which actually places the diff in the correct plane. From what I am seeing, the diff sits correctly and I haven't seen otherwise.

Either way, it seems you can bolt a OBX Helical to the Q45 ring gear......which allows one to use a Z32 axle. So with that said, it seems any R200V spec diff bolts up to the Q45 ring gear.

I have no desire to deal with the Maverick motorsports diff bushing, aligning the upper and lower bushings for the front mounts and having to deal with frankensteining stubs and dealing with axle lengths. Which gets me no where closer to bolting up any of choice of diffs I have here and a fair amount of sunken costs as I am still left with either a Viscous or an open LSD......none of which appeals to me. It would only be beneficial if it is determined a standard R200V LSD bolts to the ring gear of a R200H from a 350Z (which I am finding out the R200V is not compatible with the R200H ring gear).

Anyways, thanks for the input. Moving on from this topic.

[LoSt180]

Originally Posted by RalliartRsX

If any of the R200V (S, J, Q, etc) bolts up to Q45 ring gear, how is it there are no LSD options for the Q45?? The pumpkin is what determines axles, so essentially that is a non issue.

In terms of your second point. Do you mean the front tilted up or down?? Not sure how you can tilt forward. The front two bolt points are wider by .5". The rear bolts directly into the rear subframe via either the single bolt or the twin bolt cover (which covers are not swappable with the standard R200 and R200V carriers due to the diff housing being .5" wider), which actually places the diff in the correct plane. From what I am seeing, the diff sits correctly and I haven't seen otherwise.

Either way, it seems you can bolt a OBX Helical to the Q45 ring gear......which allows one to use a Z32 axle. So with that said, it seems any R200V spec diff bolts up to the Q45 ring gear.

I have no desire to deal with the Maverick motorsports diff bushing, aligning the upper and lower bushings for the front mounts and having to deal with frankensteining stubs and dealing with axle lengths. Which gets me no where closer to bolting up any of choice of diffs I have here and a fair amount of sunken costs as I am still left with either a Viscous or an open LSD......none of which appeals to me. It would only be beneficial if it is determined a standard R200V LSD bolts to the ring gear of a R200H from a 350Z (which I am finding out the R200V is not compatible with the R200H ring gear).

Anyways, thanks for the input. Moving on from this topic.

Your use of the term pumpkin is confusing, this isn't Ford solid axle, lol.
R200 really only refers to the size of the ring gear (200 mm). Doesn't help that Nissan has a bunch of differentials in this size, but are all different and calls them all R200 diffs.

Here's some good reading with pics on why an S15 HLSD wouldn't fit in a Z33 differential carrier. https://my350z.com/forum/engine-and-...questions.html

[TheRealSy90]

Originally Posted by RalliartRsX

If any of the R200V (S, J, Q, etc) bolts up to Q45 ring gear, how is it there are no LSD options for the Q45?? The pumpkin is what determines axles, so essentially that is a non issue.

The whole point of people swapping to a Q45 differential is typically to use the larger, stronger stub shafts. If you put an S chassis carrier inside the Q differential, you then are still using the smaller weaker S stub shafts and the whole upgrade is moot unless you ONLY sought the gear ratio.

[R3b]

Originally Posted by hanzbrady

So instead of going through 2 or 3 diffs why not just pony up and get a Z diff and axles with the lower ratio that you're after off the bat?

My diff since I bought the car has always made me question it, plus this new 180 diff is fresh and got it basically for free. I thought about going z33 swap but it will such a hassle switching to s14 subframe unless there is an s13 rear subframe option that im unaware of.... Only going to go q45 once I have all the little parts, not a big deal finding diff but more the mismatching axle setup. Best case would be get a whole s15 diff and use conversion bushings. Get a sick lsd and have 3.7 final drive.

[hanzbrady]

Originally Posted by R3b

My diff since I bought the car has always made me question it, plus this new 180 diff is fresh and got it basically for free. I thought about going z33 swap but it will such a hassle switching to s14 subframe unless there is an s13 rear subframe option that im unaware of.... Only going to go q45 once I have all the little parts, not a big deal finding diff but more the mismatching axle setup. Best case would be get a whole s15 diff and use conversion bushings. Get a sick lsd and have 3.7 final drive.

I'll admit having the resources and ability to put whatever diff I want where I want makes me a little biased.

I'm fighting this same battle with my BMW currently I just broke my 2nd diff in 1 year and I'm ready to just throw an 8.8 with custom axles and a LSD in there.

Which sounds expensive but when you realize the BMW LSD's are 1,000's of dollars and still don't fix the weak axle issue.

Anyways that's off topic, my 2 cents is to spend more upfront once and go with a setup you'll have the hardest time in the world breaking with the largest available aftermarket.