Gktech Rear Drop Knuckles - Install

After nearly 2 years in development, countless prototypes and revisions we have a lightweight yet strong drop knuckle for the S/R/Z32 chassis Nissan's. They come with dual caliper brackets as standard, high-quality PTFE lined spherical bearings throughout and have all new kinematics to drastically improve anti-squat, bump steer, camber gain curves and raised roll center height.
- Ability to run dual caliper without spacing the rotor out
- Ability to run drum brake in standard position with dual calipers (or single caliper) installed
- The drop is 40 mm - optimized for cars 40 mm lower than factory ride height (more drop would have required proprietary arms)
- High-quality PTFE lined spherical bearings throughout as standard, common bearing size so replacements are easy to get and affordable (QA1/FK part #COM10T)
- All new kinematics to significantly increase grip over regular drop knuckles
- Optimized camber curve for more even tyre wear
- Optimized bump steer for toe-in under compression without OEM arms' elastokinematics
- Increased anti-squat for more rear weight transfer and traction
- Raised roll center height for better handling
- Lightweight sheet metal design optimized using finite element analyses for ultimate strength - fully dressed weight (bearings, spacers, circlips) 4.1kg (standard knuckle is 5.1kg)
- Clearance for larger GTR drive shafts
INSTALLATION NOTES:
- To be mounted with bearing mounting holes perpendicular to the ground in static height (extended LCA's that push the wheel out to the rear of the wheel arch will NOT work well, or at all if extended too far out). Note that our rear LCA's adjust perpendicular to the centerline of the car, which makes sense.
- Will fit all GTR and Z32 chassis' with the use of an S chassis style lower coilover mounting.
- To get the most out of the kinematics improvements, an S14/S15/R33/R34 rear subframe is suggested. Alternatively, the lower control arm front pivot point can be moved up 50mm, suggested traction rod length for this is 225mm.
- Will clear 17" rims (and even 16" rims with low offsets) and all 18" rims but please note that the closer the rim sits in the wheel-well, the greater the chance that the toe arm mount will come close to hitting. A 17x10.5 +22 Enkei RPF1 wheel was tested and still has around 5 mm of clearance (ample)
- Aftermarket camber, toe and traction rods ARE required and MUST have rose joints as the suspension mounting points on the knuckle are in significantly altered and rubber or similar wouldn't have enough misalignment to work. Lower control arms can be OEM or aftermarket and do not need to be changed. OEM bushings in lower control arms will produce different bump steer curves
- The Wilwood dual caliper bracket that we offer do NOT fit on these knuckles
Australia/International
au.gktech.com/...
USA/Canada
us.gktech.com/...
Japan
jp.gktech.com/...
Timecodes
0:00 - Intro
0:06 - Unboxing
0:12 - Features
0:40 - OEM Knuckle Removal
1:50 - OEM Knuckle Bench Disassembly
2:14 - Knuckle Bench Assembly
3:04 - Install
4:55 - Outro
Show some love to the Gktech boys’ here;
Dan Brockett
/danbrockett
Johnny Caps
/casadecaps

[@marku8978]

Guys, finding the how to videos helpful. I had all your torque figures except the wheel bearings, found them here thankfully. I found I had to use the method from your LCA video to install the shank correctly as the CV joint is in the way of the top nut. Only feedback I have for the kit is that the original knuckle on the R33 uses a bolt to secure the coilover but your knuckles use a nut. Fits perfectly however I wasn't supplied a nut, would be nice to include is all. Keep up the good work! I look forward to seeing more videos :)

[@gktech]

Hi Mark, thanks for the comment. You are correct the R33 uses a bolt like the S14 and S15's. We've chosen to go with a shank and nut setup so it can cater for S13/R32 through to the later model cars. There should have been a nut included for the shank so I do apologize for that. We'll do a spot check of our stock here to make sure that none others are missing the nut. Regards, Greg

[@marku8978]

Thanks Greg, wasn't a big issue and I'm very happy with the product. Will be looking to buy some more stuff soon!

[@shirodrift2315]

Could you make a video demonstrating how to install and weld the adapter to install the brake caliper of the rear z350 for the nissan s14,15,r33,c35 I searched but I didn't find any video of yours and I bought it from you, would it be possible for you? please help me?

[@gktech]

If you are unsure how to install - please email [e-mail] or use the website live chat and the team will walk you through it.

[@danchay7870]

Do these work with stock s13 rear calipers? Do they space out the axles?

[@MrHardbody203]

is there a front knuckle drop in video ?

[@gktech]

Not a recent one - coming soon!

[@shaggyjman]

What car did the drum parking brake come from? I have to remove the brake shoe pivot before I can remove the hub bearing (z32 style)

[@gktech]

I believe this is utilising the R33 GTST 2 pot system.

[@BTurboMoto]

I have stock R32 GTR (16"x8" +30), wheels on my R32 GTS-t. Do you know if these will clear using your knuckles?

[@gktech]

They will not

[@BTurboMoto]

@@gktech damn ok. I was looking to purchase the rear full kit. I need to get some adjustable items soon

[@tyler-dum-asf]

Hey there, noticed on the website that this part is designed for 17" wheels, would the knuckles still work on stock wheels (15")? I also have a set of 16" wheels with decently high offset, however they sit in the yard for 90% of the year, so ideally would like to keep my stock look

[@gktech]

They are not compatible with the OEM 15" wheels sorry.

[@tyler-dum-asf]

@@gktech unfortunate, thank you for the quick response though

[@chrisrojeski5722]

How do these knuckles work with r33 rear shocks? My rear shocks don’t come with the circular bottom mount, they have the forked bottom, as we went around a bushing...

[@bikingkeebler]

gtst has eyelet and gtr is fork

[@Mudbaby22]

Why not make a dual caliper version?

[@gktech]

Our rear knuckles do have a provision for a second caliper.

[@BigHyeon]

Is it fit for 350z?

[@gktech]

We are still in the prototype phase of our Z knuckles

[@ramkumars5894]

da