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NSX > DPP > Honda JDM Short Gearset

factory 5-spd
short gear kit

Honda 5-spd Short Gear Kit

Japanese and European 5-speed NSX are equipped with a gearset that offers tighter 2-4 gear ratios. The US gearset results in shift points in the lower gears that places the resulting engine speed below the optimal power point. The JDM short gears allow better acceleration especially noticeable in the shift between 1st and 2nd as the engine does not fall out of the useable powerband. The JDM Short Gearset includes all parts to retrofit your US-spec gearbox. This modification results in faster acceleration times. Excellent in combination with the NSX-R 4.23 or Comptech 4.55 final drive gears.

The kits include the mainshaft and gears for the counter and mainshaft.

For high mileage NSX, we recommend replacing the common gears found in all NSX transmissions.

gear shift points (courtesy of NSXPrime.com)

shift	US stock gears (4.06 R&P)	Japanese short gears (4.06 R&P)
1-2	4433 RPM	5013 RPM
2-3	5698 RPM	5705 RPM
3-4	6262 RPM	5824 RPM
4-5	6284 RPM	5983 RPM

Speed 0-MPH	Baseline	Japanese 5-speed	4.235 R&P	4.55 R&P	Japanese 5-speed 4.55 R&P	Japanese 5-speed 4.235 R&P
0-30	2.16	2.16	2.08	1.94	1.94	2.08
0-40	2.92	2.92	2.80	2.62	2.62	2.80
0-50	4.16	4.11	4.11	4.02	3.91	4.04
0-60	5.56	5.34	5.45	5.27	5.00	5.22
0-70	6.99	6.60	6.82	6.54	6.60	6.42
0-80	8.46	8.52	8.23	8.45	8.24	8.44
0-90	10.74	10.46	10.65	10.42	9.94	10.28
0-100	13.13	12.48	12.91	12.49	12.33	12.58
0-110	15.66	15.67	15.31	15.40	15.39	15.64
0-120	19.02	19.25	19.02	18.72	18.38	18.98
0-130	23.56	23.27	23.24	23.42	23.26	22.72
0-140	28.93	27.91	28.13	28.90	30.36	30.04

calculated estimates of perfomance gains with available gear options
(courtesy of NSXPrime.com)

We offer as an option the "common gears" found in the US and Japanese 5-spd transmissions. These three gears include the countershaft 1st gear, mainshaft 5th gear, and countershaft 5th gear. These gears do not need to be replaced in transmission rebuilds unless there is existing damage or there is wear from mileage (we usually recommend replacing these if the transmission has more than 150k miles.

specs

fitment:

NSX 1991-96

Honda JDM 5-spd Short Gearset

[dpp-162] $1,237.50

Honda 5-spd common gears - NSX, 1991-96

[dpp-166] $366.50