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View Full Version : speedo after new gears?


jeffseal
01-25-2003, 07:34 PM
anyone know a chart i could look at to figure how off my speedo is.

car came with 225 75 r15's and 3.27s

Now i have 4.10's with a set of 33's and 35's

Thanks
Jeff

Alec
01-25-2003, 07:40 PM
With you're 35s you're actually almost exactly at the stock gear ratio so your speedo will be the same as stock. With the 33s, you're speedo is gonna be about 5% more off than stock, your speedo will read too high. To solve this you could get a speedo gear with one more tooth than your current one.

jeffseal
01-25-2003, 08:34 PM
awsome! thanks

X-1
01-25-2003, 08:38 PM
Jeff, thanks for asking that question, and Alec, thanks for the answer.:D

Alec
01-25-2003, 08:40 PM
http://www.zjstech.net/~library/2481/dancingbanana.gif

keep in mind that this is gonna be different for every gear and tire combo, and depends on what was stock.

X-1
01-25-2003, 08:49 PM
I am also going to 35's, and currently have 3.27 gears, so I will bw following Jeff in getting 4.10's as well.

Alec
01-25-2003, 08:51 PM
IMO 4.56 would be a better choice. You can always change your speedo gear to compensate.

X-1
01-25-2003, 08:55 PM
i was thinking that, would you just go to a higher gear, if there was one, I think mine may be the highest now, or would you go to like a 3.55 speedo gear.

Alec
01-25-2003, 08:57 PM
The speedo gears have anywhere from 16-21+ teeth. With 4.56s, you'd need one with I think 2 more teeth than your current one. No telling what your current one is until you look at it.

X-1
01-25-2003, 09:01 PM
Thanks, I know that the one for a 3.73 is 19 teeth, so if I go up 2 to a 21 tooth for the 3.55, figuring that mine is probably a 23 tooth gear for the 3.27's:confused: Another issue to work on.

Alec
01-25-2003, 09:06 PM
no, you probably have a 16 or 17 tooth gear.

X-1
01-25-2003, 09:08 PM
Hmm,
Tomarrow I will find out.