I had my LJ re-geared about a week and a half ago to 4.56 with the 35" tires. The shop put in a 35 tooth speedo gear. Now when I check most of the online sources for which speedo gear I need, they say it should be 37 tooth. One chart even claims to be GPS verified with that speedo gear and my diff gear ratio and tire size. The stock setup was 3.73 gears, 30 inch tires and a speedo gear with 34 teeth. When I got the 35 inch tires on the same 3.73 gears, I had a 29 tooth speedo gear. Now when I crunch the numbers and do the math my self, I keep coming up with 35.6 tooth gear. Now I know I can't get a gear with half a tooth so should I stick with the 35 tooth or round up to 36 or follow the charts and get a 37? And if the 35 tooth is in fact too small, am I reading more or less miles than actually traveled? I want this to be as accurate as possible. I would like to see if my mileage has improved any with the re-gear but I can't do that if my speedometer isn't accurate. Thanks.

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David
Bel Air,Md
2003 KJ Patriot Blue Sport w/mods R.I.P.
2005 Wrangler Unlimited not so stock
L.O.S.T. #082670
http://www.cardomain.com/ride/803306
http://www.cardomain.com/ride/2399643
More mods planned than money.
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"Roads, where we're going we don't need roads."

Speedo Gear in an "05" LJ ?????
The speedo is electronically controlled.......no gears....

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On the Road to No Where.......
KE7QOR
Certified Tread Lightly Trainer

LIFETIME KJ MEMBER.....and dang proud off it !!!

cheep GPS unit and use that
the gear things never seem to work right

Only the Rubicon TJ/LJ's with the 241 transfer case are electronically controlled. All other TJ/LJ's use the speedo gear.

_________________
David
Bel Air,Md
2003 KJ Patriot Blue Sport w/mods R.I.P.
2005 Wrangler Unlimited not so stock
L.O.S.T. #082670
http://www.cardomain.com/ride/803306
http://www.cardomain.com/ride/2399643
More mods planned than money.
-----------------

"Roads, where we're going we don't need roads."

Oh........ok, now that makes sense.
I'm in the same boat, but running 5:13's
Speedo and odo are off, and I cant change a speedo gear- electronicaly controlled

_________________
On the Road to No Where.......
KE7QOR
Certified Tread Lightly Trainer

LIFETIME KJ MEMBER.....and dang proud off it !!!

with my stock tires, the speedo was off, but with 32's the speedo was dead on, go figure

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_,[____],
l---L-OlllllllO-
()_) ()_)---)_)

'03 TJ X with 32's and other doodads
'04 Columbia Edition KJ
'78 GMC K25 beast
'06 Yamaha 450 kodiak

Ok, so does anyone have a GPS I can borrow to see how far I'm off.

_________________
David
Bel Air,Md
2003 KJ Patriot Blue Sport w/mods R.I.P.
2005 Wrangler Unlimited not so stock
L.O.S.T. #082670
http://www.cardomain.com/ride/803306
http://www.cardomain.com/ride/2399643
More mods planned than money.
-----------------

"Roads, where we're going we don't need roads."