Transfer Case Calculator

Select Lower Set Ratio
1.000
1.628 Helical
1.640
2.407 Helical
2.421
2.824 Upper Set Ratio

Quick Change		Without Rears Transfer Ratio
Gear Ratio	Tooth Count	UNDERDRIVE	OVERDRIVE
1.000	32/32	1.000	1.000
1.032	31/32	1.032	0.969
1.065	31/33	1.065	0.939
1.100	30/33	1.100	0.909
1.133	30/34	1.133	0.883
1.172	29/34	1.172	0.853
1.207	29/35	1.207	0.829
1.250	28/35	1.250	0.800
1.286	28/36	1.286	0.778
1.333	27/36	1.333	0.750
1.370	27/37	1.370	0.730
1.420	26/37	1.420	0.704
1.462	26/38	1.462
1.520	25/38	1.520
1.560	25/39	1.560
1.625	24/39	1.625
1.667	24/40	1.667
1.739	23/40	1.739

MPH Calculator

If transmission is in high gear, enter 1 for trans ratio

X X X 336