The GKTECH S/R Chassis to 350z/370z Diff conversion bushes allow you to bolt in the stronger 350z/370z/G35/G37 differential to your 2 bolt R200 S14/S15/R33/R34 subframe.
The bushings are CNC Machined from 6061-T6 aluminium and require no further modification to the subframe, just simply press the two bushings into the diff, while pressing the other in the subframe.
You will notice there are two options to choose from, most commonly people have the OEM single bolt cover, which comes as shown in the product photo. To help strengthen the rear support of the diff and counteract the single stud we do now also offer an extended capacity dual stud diff cover (now available).
The other selection is for two bolt Z33/Z34 diff housings, which will come with two front bushings and two rear bushings.
NOTE: Upon fitment, please check driveshaft (CV/axle) length to ensure there are no possibilities of the driveshaft (CV/axle) overextending or driveshaft (CV/axle) compression, which may lead to failures.
NOTE #2: The option "Z33/Z34 diff conversion secondary bush (for S14/S15 subframe)" is for those that are already running the conversion bush set (3pcs) and only want to purchase the 4th bush when running one of our machined dual stud diff covers or the Greddy dual stud diff cover.
GKTECH
S/R Chassis to 350/370Z Diff Conversion
What is a Backorder?
Q: What is backorder?
When a product is on backorder, it means that we have sold out and we are opening a back order due to popular demand. This is essentially a queue, when new stock arrives from production, we’ll send your order.Q: Will items in my order that are in stock be shipped out first?
We will send your order altogether once your backorder item is ready! You may wish to place separate orders if you want an item before the other is due back in stock.The GKTECH S/R Chassis to 350z/370z Diff conversion bushes allow you to bolt in the stronger 350z/370z/G35/G37 differential to your 2 bolt R200 S14/S15/R33/R34 subframe.
The bushings are CNC Machined from 6061-T6 aluminium and require no further modification to the subframe, just simply press the two bushings into the diff, while pressing the other in the subframe.
You will notice there are two options to choose from, most commonly people have the OEM single bolt cover, which comes as shown in the product photo. To help strengthen the rear support of the diff and counteract the single stud we do now also offer an extended capacity dual stud diff cover (now available).
The other selection is for two bolt Z33/Z34 diff housings, which will come with two front bushings and two rear bushings.
NOTE: Upon fitment, please check driveshaft (CV/axle) length to ensure there are no possibilities of the driveshaft (CV/axle) overextending or driveshaft (CV/axle) compression, which may lead to failures.
NOTE #2: The option "Z33/Z34 diff conversion secondary bush (for S14/S15 subframe)" is for those that are already running the conversion bush set (3pcs) and only want to purchase the 4th bush when running one of our machined dual stud diff covers or the Greddy dual stud diff cover.
Choose options
FAQs
Will this fit my car?We can only confirm fitment for the vehicles listed above under "vehicle compatibility". If your car is not listed there, then we don't know if it will fit.
Do you make these to suit other cars?
We only sell the parts listed on our website. If it's not listed on our website, then we don't sell it. Sorry.
What's the advantage of using the GKTech 350/370z diff conversion bushes?
The 350z/370z/G35/G37 diffs are becoming more readily available and are newer than the 15+ year old diffs people use now. They also have driveshaft (CV/ axle) sensors which are great to use for calculating wheel speed. The stub spline that goes into the diff center is the same as R33 GTR being a 31 spline. As opposed to the R32 GTR diff being 30 spline and the R33 GTS-T diff being 29 spline.
The pinion gear thread is also larger on these diffs then any S/R chassis diff. They also use Rzeppa style driveshafts (CV/ axles), which are significantly stronger as oppose to the Tripod design S/R chassis have which are weaker.
The driveshafts of the all the CV/ axles excluding the 370z also directly bolt up to S/R chassis wheel hubs. The 370z shafts have a GTR spline output to the rear wheel bearing/hub, meaning the wheel bearing/hub would need to be changed to the GTR equivalent.
What modifications are required, is this hard to fit?
You will need to redrill your diff flange to suit your tailshaft bolt PCD, which can be done relatively easily. Then press the bushes into the diff and subframe. Please take note of which direction the rear bush is to be facing based on the position of the diff stud before pressing the bush in.
Is there anything else needed for installation?
You will need to purchase the diff itself. Apart from that, the OEM hardware can be used as the bushes will arrive as shown in the product photo.
Can I install this myself? If so how long will installation take?
Yes, it is relatively straightforward. Once the subframe is out it should take around 45 minutes.
Do these bushes offset where the diff mounts in the subframe?
No, the bushings have been designed to align the diff in the center of the subframe.
I keep breaking the teeth off my crown wheel, will this diff be strong enough to stop that happening?
No, the crown wheel and pinion and the same between S/R/350z/370z/G35/G37. That is why they are still called an R200.
What sort of ratios do these diffs have?
The 350z/370z/G35/G37 diffs have a wide variety of OEM ratios which can be seen here;
Z33 - MT - R200 - 3.538
Z33 - MT - R200V - 3.538
Z33 - AT - R200V - 3.357
Z34 – MT – R200V – 3.692
Z34 – AT – R200V – 3.357
G35 - Sedan - AT - R200 - 3.357
G35 - Sedan - MT - R200V - 3.538
G35 - Sedan - AWD - AT - R200 - 3.357
G35 - Coupe - MT - R200V - 3.538
G35 - Coupe - AT - R200 - 3.357
G35 - Coupe - AT - R200V - 3.357
G37 – Sedan – AT - R200V – 3.357
G37 – Sedan – MT – R200V – 3.692
They also have aftermarket support with ratios from 3.9, 4.1 and 4.3
VEHICLE COMPATIBILITY
Nissan
R32 SKYLINE GTRR33 SKYLINE GTR
R33 SKYLINE GTS-T
R33 SKYLINE GTS4
R34 SKYLINE GT-T
R34 SKYLINE GTR
S14 200SX/SILVIA
S15 200SX/SILVIA
Fitment was great made it much easier
As a machinist myself, I’d say these are pretty great quality just a pain to install but that’s normal. Definitely would buy again!
Crazy how easy these are to install and get a 350z diff up into an r33 subframe 👌
This part also perfict to use with pathfinder r51 diff 😁
Just give option for someone other than Australian post. Took nearly a month to get to me in from Australia to New Zealand . DHL might be a better option ?
Hi Chase, I'm glad to hear you're happy with your item. The good news is that we do also offer DHL in the checkout (and Fedex)
Hard..
Figuring out the orientation of the bushes is a nightmare.
Would be great if you guys did a guide for this one
Also my r33 sway bar needs to be spaced out as it hits the diff
I have yet to use the item, but upon receiving and test fitting in my diff, I found the front bushings to be a non-interference fit. I emailed to inquire as I was expecting interference fitment in the front ears of the diff assembly.
Perhaps adding a line in the product description would prevent or answer these questions for future sales.
Overall, the product looks great and I’m looking forward to getting my Z34 Nismo diff installed.
Hi Glenn, as the guys probably explained it's unnecessary for the front bushings to be an interference fit. It will just make the install more difficult without any real need as the diff is sandwiched against the subframe and physically can't move.
Great product, fits like a glove 🤌
Delivery on time in France thank you and the parts are as described.
Really good quality item, would be a 5 star rating if they came with instructions showing orientation of the bushes seeing as they are offset to suit an R/S Chassis Cradle
Fit great no surprises 😉
Overall the install was fairly easy being my first time doing this 10/10 great product
Great product..
best diff on the market and one the easier install u can ask for......gkteck does it again
I removed the other aftermarket bushings to get the subframe closer to the frame of the car, but the bottom part of the bushings didnt fit, would have to do more cutting. So i combined the old bushing with the new one, had to cut the metal insert, i other words wasnt just as remove the old one and install the new one. Bought several products from you before, but first time having a problem like this
Hi Jose, thanks for the feedback but I don't quite follow. We've sold a few hundred sets of these now and I've installed a few sets myself without issue. Do you happen to have any photos of what you've done?
Great product.
Worked as planned, high quality product., great company to deal with.
Straight forward install. But beware that this is o my bolt on to cars without abs.
The abs cars have a shorter drive shaft and an abs sensor in the diff that is necessary for the abs system to work.
All euro and us sold 200sx is with abs to my knowledge.
Goes with your build
Picked just for you 😘
