Tranny gear ratios for DSMs

According to the Shop Manual CD, here are the gear ratios for 1G NTs, 1G/2G FWDs, 1G/2G AWDs, 2G 2.4 Spyders, Galant GSXes (GGSX, AWD nonturbo) and Galant VR4s. The Shop Manuals for the different years sometimes conflicted with the Tech Manual (the CD only has the early Tech Manual, so only covers 1Gs), so I put what I thought were the proper numbers in some places. I have put the Galant GSX in the Turbo section to make it easy to compare with the GVR4.

NonTurbo
Gears	1G NT	2G NT 2.0	2G NT 2.4
1st	3.363	3.54	3.166
2nd	1.947	2.13	1.833
3rd	1.285	1.36	1.240
4th	0.939	1.03	0.896
5th	0.756	0.81	0.731
R	3.083	3.42	3.166

Primary	1.096	?	?
Secondary	3.941	?	?
FINAL	4.322	3.94	3.625

Turbo
Gears	1G FWD	2G FWD	1G AWD	2G AWD	GVR4	GGSX	EVO GVR-4
1st	3.083	3.090	3.083	3.083	2.846	2.846	2.571
2nd	1.833	1.833	1.684	1.684	1.684	1.684	1.600
3rd	1.217	1.217	1.115	1.115	1.115	1.115	1.160
4th	0.888	0.888	0.833	0.833	0.833	0.833	0.862
5th	0.741	0.741	0.666	0.666	0.666	0.690	0.617
R	3.166	3.166	3.166	3.166	3.166	3.166	?

Primary	1.206	1.206	1.275	1.275	1.275	1.680	1.275
Secondary	3.437	3.437	3.866	3.866	3.866	3.100	4.260
Transfer	NA	NA	1.090	1.090	1.090	1.090	1.090

Final	4.153	4.153	4.929	4.929	4.929	5.208	5.435

The "Primary" ratio is the Intermediate Shaft driving the Center Diff on an AWD or the Output Shaft on a FWD.

The "Secondary" ratio is the Output Shaft driving the Ring Gear on the Front Diff.

If someone wanted to change the final drive ratio on an AWD, you need to change the ring gear on the front diff along with the stubby Front Output Shaft that is driven by the center diff. These are both inside the transmission. Then the rear differential ring and pinion gears must be changed to match. The rear diff ratio will be slightly different but will equal out when multiplied by the 1.090 of the transfer case.

Primary x secondary = final
Primary x secondary x transfer x rear diff = final
The two must equal each other for an AWD car to roll.

Note that the AWD has the tallest 5th gear ratio, if swapped to a FWD trans it would raise the top speed considerably (if you had the power to pull it).

Questions, suggestions, comments, constructive criticism and/or corrections? Email me at talonts@vfaq.com.

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