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Speedo Gears

To use the table, find the diff ratio you have in the left column, then your tire height from the top row. The Speedo gear tooth number needed is where the two intersect. These numbers are not GPS verified and are mathematical representations using the following two equations:

Old wheel diameter x old Speedo gear teeth, divide by new wheel diameter = teeth on new gear
# of teeth on old gear x new gear ratio divided by old gear ratio = # of teeth on new gear

When using the below chart, knowing the actual (not rated) tire size will be very helpful in getting a more accurate speedometer. IE not all 35" tires actually measure 35" tall. Some can be closer to 34".

										Tire	Size
Diff Ratio	27	28	29	30	31	32	33	34	35	36	37	38	39	40	41	42	43	44
3.07	31	30	29	28	27	26	25	25	24	23	23	22	21	21	20	20	19	19
3.31	33	32	31	30	29	28	27	27	26	25	24	24	23	23	22	21	21	21
3.55	36	35	33	32	31	30	29	28	28	27	26	25	25	24	24	23	23	22
3.73	38	36	35	34	33	32	31	30	29	28	27	27	26	25	25	24	24	23
3.92	40	38	37	36	34	33	32	31	31	30	29	28	27	27	26	25	25	24
4.10	41	40	39	37	36	35	34	33	32	31	30	29	29	28	27	27	26	25
4.27	43	42	40	39	38	36	35	34	33	32	31	31	30	29	28	28	27	26
4.56	46	44	43	41	40	39	38	37	36	35	34	33	32	31	30	30	29	28
4.88	49	48	46	44	43	42	40	39	38	37	36	35	34	33	32	32	31	30
5.13	52	50	48	47	45	44	42	41	40	39	38	37	36	35	34	33	33	32
5.38	54	52	51	49	47	46	44	43	42	41	40	39	38	37	36	35	34	33
5.89	59	57	55	54	52	50	49	47	46	45	43	42	41	40	39	38	37	36
6.17	62	60	58	56	54	53	51	49	48	47	45	44	43	42	41	40	39	38
7.17	72	70	67	65	63	61	59	57	56	54	53	51	50	49	48	47	45	44

Part Numbers

The application years listed below are estimates. To be sure, contact me and I'll look up your application to be sure you are ordering the correct gear. This goes for any Dodge, Chyrsler or Jeep product - not just Jeep.

Part Numbers: 1993-2006

Part numbers: 1954-1992

( short shaft )

- 52067629 - 29 tooth Speedo gear
- 52067630 - 30 tooth Speedo gear
- 52067631 - 31 tooth Speedo gear
- 52067632 - 32 tooth Speedo gear
- 52067633 - 33 tooth Speedo gear
- 52067634 - 34 tooth Speedo gear
- 52067635 - 35 tooth Speedo gear
- 52067636 - 36 tooth Speedo gear
- 52067637 - 37 tooth Speedo gear
- 52067638 - 38 tooth Speedo gear
- 52067639 - 39 tooth Speedo gear
- 52067640 - 40 tooth Speedo gear
- 52067641 - 41 tooth Speedo gear

( long shaft )

- 52068151 - 29 tooth speedo gear

- 52068152 - 30 tooth speedo gear

- 52068153 - 31 tooth speedo gear

- 52068154 - 32 tooth speedo gear

- 52068155 - 33 tooth speedo gear

- 52068156 - 34 tooth speedo gear

- 52068157 - 35 tooth speedo gear

- 52068158 - 36 tooth speedo gear

- 52068159 - 37 tooth speedo gear

- 52068060 - 38 tooth speedo gear

- 52068061 - 39 tooth speedo gear

- 52068062 - 40 tooth speedo gear

- 2538941 - 41 tooth speedo gear

- 2538942 - 42 tooth speedo gear

- 2538943 - 43 tooth speedo gear