If its a street car, or you ever really plan on driving it on the street, do yourself a favor, and get helical cut gears. I put about 2000 street miles in an R32 with a PPG trans. Straight cut, dog engagement. The whine from the gearbox cruising on the highway way pretty annoying. Louder than the 4 inch exhaust, and the Weldon fuel pump. Your mileage may vary, but the pitch and tone of it, isn't a good sound for a long time. Its 2024, and there are a few more options available, including pure drag race only Powerglides and Turbo400's. Then there are also DCT and
Nissan gearbox codes
F = Floor Shift
S = Overdrive
5 = five forward gears
R30 = gearbox series
A = first revision
Engines using 30A gearboxVG30,VG33,VG35, RB25DET,RB26DETT,QD32, RD28T
Applications using the FS5R30A
JAPAN
Z31 1987-1989 Fairlady with VG30DE
R32 Skyline with RB26DETT
R33 Skyline with RB25DET, RB26, OR 4WD
R32 Skyline with RB25DET or 4WD
R50 Terrano
D22 Datsun Truck with QD32
AWC34 Stagea with RB20E,RB20DE,RB25DE,RB25DET
WC34 Stagea
WD21 Terrano with VG30E
Y60 Safari with RD28T
USA
Z31 1986-1989 300ZX with VG30DT Turbo
Z32 1990-1996 300ZX with VG30DE or VG30DTT
D21 Hardbody pickup VG30
WD21 1992-1995 Pathfinder VG30I,VG30E
D22 Frontier VG33E
WD22 Xterra VG33E, VG33ER
R50 1996- Pathfinder VG33, VG35
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V160 6 speed Getrag in an R34 N1. Notice the AN fittings for the transmission cooler. |
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Samsonas Nissan Skyline GT-R sequential gearbox |
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OS Giken gearset. This goes in the stock case, and takes OEM parts. |
OS Giken has several different gearsets available for the R32 and R33 transmission. Prices range from $2370 to $3350
NS201-GA 3-speed close ratio gear kit Ratios:2.695/1.703/1.236/
NS201-GL 3-speed close ratio gear kit with 5th gear Ratios: 2.695/1.703/1.236/1.000/0.826
NS201-GM 3-speed CRGK with Reinforced input (standard or Hollinger type Available) Ratios: 2.695/1.703/1.236 (6-D)
NS201-GN 3spd CRGK w/5th gear & Reinforced input shaft (standard or Hollinger type Available) Ratios: 2.695/1.703/1.236/1.00/0.826 (17-D)
The OS Giken kits, are just that kits to replace the gears. They also have their
OS88 sequential transmission .
What can help a stock geared, or even an OS Giken geared 5 speed transmission, is a billet center plate. We find that flex in the OEM center plate contributes to failures of 3rd gear. When anything breaks, is always up to car, clutch, fluid, driver, tires.
OS Giken Crossmission (Close Ratio transmission) 4.111 front and rear diffs
A type.
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1. 2.695
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2. 1.703
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3. 1.236
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4. 1.000
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265/35/18 tires Speed in gears
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55mph
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87mph
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120 mph
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149 mph
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RPM drop with 8000 rpm shift
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8000 rpm
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5000 rpm
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5700 rpm
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6400 rpm
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F type
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1. 2.599
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2. 1.669
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3. 1.198
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4 1.000
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265/35/18 (?) tires Speeds in gears
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57 mph
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89 mph
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124 mph
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149 mph
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RPM drop with 8000 shift
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G type
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1. 2.516
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2. 1.699
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3. 1.198
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4 1.000
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265/35/18 (?) tires Speeds in gears
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59 mph
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89 mph
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124 mph
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149 mph
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RPM drop with 8000 shift
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Option 5th gear
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5. .826
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265/35/18 (?) tires . Speed in gear 8000 rpm
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181 mph
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4-5 shift rpm drop
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6600 rpm
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OS88 sequential Transmission
OS Giken Sequential Transmission - Page 1
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1. 2.609
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2. 1.934
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3. 1.521
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4.1.210
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5.1.000
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6.0.852
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HKS version 1
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1 2.519
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2 1.820
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3 1.300
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4 1.000
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5 .807
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6 .650
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275/40/17 8000 rpm
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59 mph
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8500 rpm
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62 mph
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9000 rpm
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67 mph
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9500 rpm
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72 mph
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HKS version 2
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1 2.701
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2 1.904
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3 1.343
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4 1.000
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5 .832
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6. .734
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Quaife - 6 speed Dog engagement
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1. 2.782
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2. 1.938
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3. 1.506
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4.1.178
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5.0.920
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6.0.777
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$ 7,395.00 - fits in stock gearbox
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Greddy - Grex - 6 speed Dog engagement
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1. 2.782
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2. 1.938
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3. 1.506
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4.1.178
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5.0.920
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6.0.777
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Made by Quaife
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Route 6
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1 2.605
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2 1.715
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3 1.244
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4 1.000
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5 .752 |
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Holinger H6S transmission. Bolts up to R32/R33 engine and transfer case |
Holinger H6S- 6 speed sequential
Available Ratios
Normal R32/R33
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1 3.214
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2 1.925
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3 1.302
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4 1.000
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5 .752 |
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275/40/17 -
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46 mph
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77mph
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114 mph
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148 mph
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197 mph
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RPM Drop on 8000 shift
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8000 rpm
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4750 rpm
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5400 rpm
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6250 rpm
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6000 rpm
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Final Ratio - 4.111
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Normal R34
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1.3.827
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2. 2.360
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3. 1.685
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4. 1.312
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5 1.000
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6 0.793
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245/40/18
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45 mph
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73 mph
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102 mph
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131 mph
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172 mph
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217 mph
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Final Ratio- 3.545
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Speedtek Close Ratio Gearset
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Speedtek close ratio gearset for R32 GT-R |
I have noticed the guys from Speedtek for several years. They had a well priced close ratio gearset for the RB series transmissions. RB26 and RB25 FS5r30a. I wanted to try out a set, and recently I was in contact with them.
1st 2.69
2nd 1.69
3rd 1.24
4th 0.99
5th 0.70
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Speedtek gearset, 255/50/16 tire, 4.375 gears, 8500 rpm shifts |
OS Giken Crossmission gearset
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Crossmission, or close ratio transmission |

Stock GT-R gearsets. Both have broken 3rd gear.
OS Giken - OS88 - Sequential 6 speed transmission
The OS88 is comprised of synchro-less helical cut gears and is the perfect complement for a tuned RB26DETT motor. It can be ordered with 4 different sets of gear ratios to suit almost any engine power profile and racing purpose.
Gear ratios:
Standard: 1st – 2.609 / 2nd – 1.934 / 3rd – 1.521 / 4th – 1.210 / 5th – 1.00 / 6th – 0.852
Option ratio 1: 1st – 2.609 / 2nd – 1.934 / 3rd – 1.521 / 4th – 1.210 / 5th – 1.00 / 6th – 0.785
Option ratio 2: 1st – 2.890 / 2nd – 1.981 / 3rd – 1.468 / 4th – 1.174 / 5th – 1.00 / 6th – 0.757
Option ratio 3: 1st – 2.516 / 2nd – 1.865 / 3rd – 1.468 / 4th – 1.174 / 5th – 1.00 / 6th – 0.822
Optional Parts:
Release Bearing Set
Adjustable Fork Kit
OS88 Exclusive Transmission Crossmember (allows extra 40mm of road clearance)
Center Alignment Tool
Direct Shift Lever Kit
Heavyweight Shift Knob
OS88 Manual in English
Getrag Transmission Rebuild

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The Getrag uses Nissan part KLD40-00004 transmission fluid or oil |
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Getrag with a conversion kit for an ATS carbon clutch |
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Pull style throw out bearing on a NISMO twin plate clutch for R34 GT-R |
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Pull style throw out bearing on a NISMO twin plate clutch for R34 GT-R |
Nissan Skyline GT-R Transmission and clutch parts and part numbers
Clutch Pull to push conversion- Late Model R32, R33
Front cover assembly :
32110-05U11 (japan part only)
Gasket :
32112-05U12
Clutch fork :30531-01S00 (same part for a 1991-1993 240SX)
Spring :30514-14600
Spring :30534-E9000
T/O bearing :
30502-14601
Bearing sleeve:30501-S0160 / 30501-N1601 (14mm for twin / trip disc)
Bearing sleeve: 30501-K0404 (24mm for single disc)
Dust cover :30542-31610
Slave cylinder :30620-21U01
Flywheel bolt: 12315-04U00
Crank dowel:
13032-18000
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Late R32 bellhousing. This has bosses for push and pull clutch. It is currently a push clutch, or early. |
Factory Clutch
R32 GTR
(There are early and late R32, so double check this)
Disc- C0100-05U15
Cover-30210 - 05U01
Bearing- 30502-21000
R33 GTS
Disc- 30100-21U01
Cover- 30210-21U00
Throw out bearing- 30502-12U00 (300ZX part) or 30502-45P00 (300ZX part)
Bearing Sleeve- 30501-S0200 (18mm)
R33 GTR
Disc- 30100-0V708
Cover- 30210-24U00
Bearing- 30502-12U00
R34 GTR
Disc- 30100-0V708
Cover-30210 - AA300
Bearing- 30502-12U00
Updated 3rd, 4th and 5th gear trans part (R32-R33)
32606-30P10 Coupling sleeve
32251-30P14 2nd gear
32604-30P60 ring 5th
32261-12014 3rd gear
32604-30P61 ring
32811-05U10 shift fork
32611-AA510 Coupling sleave
32609-70L15 Shifting insulator X3
32201-05U71 Main drive gear
32604-40P61 ring
32605-30P11 Hub
32603-30P00 Spring shifting X2
32212-AA504 Counter gear
32230-054U24 First gear
32137-AA500 Plate
32341-30P04 Over drive gear ( 5th gear )
32245-30P60 Reverse gear
32220-30P60 Reverse gear
32614-30P60 Ring
32615-30P60 Shifting insulator X3
32214-01G21 Counter
32616-30P20 Coupling sleeve
32282-30P61 Reverse gear
32320-VB361 Shaft
32139-VB300 retainer
32312-30P24 gear
32320-VB361 shaft
32139-VB300 retainer
Throw Out Bearing Sleeves
Depending on what clutch, and flywheel you are running, you may need a new throw out bearing sleeve for the early, push style clutches. The height listed is from the front side of the fork to the seat position of the bearing.
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OS Giken Super Single and Multi Plate Clutch Notes |