It looks as if there are 3 major companies that make upgraded gear sets or transmissions for the GTR
The question is, how much torque will they hold, and do they fit inside of the factory casing, especially the 6 speed upgrades for the r33's? Also, which one is most like a street transmission (meaning it has an "H" pattern to it and helical gears) only stronger?
For the R34 gtr, there is
OS Giken (6 speed replacement)
http://www.greenline.jp/catalogue/bccatpar...gory=drivetrain
For the R33 gtr, there are
http://www.greenline.jp/catalogue/bccatpar...gory=drivetrain
OS Giken
OS Giken Cross Gear Kit (3 speed) -(GL)DTGSR32C01
(Gear Sets) ¥212,520
1st: 2.695, 2nd: 1.703, 3rd: 1.236.
Greenline Motorsports - OS Giken 5th Gear OS Giken 5th Gear -(GL)DTGSR32C02
(Gear Sets) ¥80,388
3 Speed Cross Gear Kit option part. 5th: 0.826.
Greenline Motorsports - OS Giken Heavy Duty Input Shaft OS Giken Heavy Duty Input Shaft -(GL)DTGSR32C03
(Gear Sets) ¥61,908
3 Speed Cross Gear Kit option part. Available for standard or Holinger type input shaft - please specify when ordering.
Greenline Motorsports - OS Giken Cross Gear Kit (3 speed) Set OS Giken Cross Gear Kit (3 speed) Set -(GL)DTGSR32C04
(Gear Sets) ¥258,720
Includes heavy duty input shaft. 1st: 2.695, 2nd: 1.703, 3rd: 1.236. Available for standard or Holinger type input shaft - please specify when ordering.
Greenline Motorsports - OS Giken Cross Gear Kit (5 speed) Set OS Giken Cross Gear Kit (5 speed) Set -(GL)DTGSR32C05
(Gear Sets) ¥300,300
¥245,000
Includes heavy duty input shaft. 1st: 2.695, 2nd: 1.703, 3rd: 1.236, 5th: 0.826. Available for standard or Holinger type input shaft - please specify when ordering.
Greenline Motorsports - OS Giken RB26 6 Speed Sequential Transmission OS Giken RB26 6 Speed Sequential Transmission -(GL)DTGBOSGTR01
(Gearboxes)
1st: 2,609, 2nd: 1.934, 3rd 1.521, 4th: 1.210, 5th: 1.000, 6th: 0.852.
Greenline Motorsports - OS Giken OS-88 Transmission Member OS Giken OS-88 Transmission Member -(GL)DTGBOSGTR02
(Gearboxes) ¥43,313
HKS
HKS Manual Transmission -1603-RN008
(Gearboxes) ¥1,030,838
Version I. 6 speed. 1: 2.519, 2: 1.820, 3: 1.300, 4: 1.000, 5: 0.807, 6: 0.650. For use with HKS clutch.
Greenline Motorsports - HKS Manual Transmission HKS Manual Transmission -1603-RN009
(Gearboxes) ¥1,030,838
Version II. 6 speed. 1: 2.709, 2: 1.904, 3: 1.343, 4: 1.000, 5: 0.832, 6: 0.734. For use with HKS clutch.
Greddy
TRUST GReddy 6 Speed H Pattern Transmission (Helical Gear Type 2) -14920203
(Gearboxes)
6 speed. 1: 2.782, 2: 1.938, 3: 1.506, 4: 1.178, 5: 0.920, 6: 0.777. Final gear: 4.111. Discontinued.
Greenline Motorsports - TRUST GReddy 6 Speed Sequential Transmission TRUST GReddy 6 Speed Sequential Transmission -14520012
(Gearboxes) ¥1,295,910
6 speed. 1: 2.796, 2: 1.994, 3: 1.537, 4: 1.191, 5: 0.918, 6: 0.767. Final gear: 4.111
Greenline Motorsports - TRUST GReddy Front Cover TRUST GReddy Front Cover -14920204
(Gearboxes) ¥17,672
For use with TRUST 6 Speed H Pattern Transmission (Helical Gear Type 2)