So I finally lifted my rig, and put 33s on it. For the first year and a half that I owned it, every time I passed one of those radar speed limit check things on the side of the road, it always said I was going about 3-4mph less then what my speedo said. Now it's lifted and I pass one yesterday and the thing is dead-on-balls accurate.
So I'm wondering if it's possible that it was lifted by a PO, and returned to stock before they sold it. I haven't opened up the transfer case yet, so I don't know for sure what gears it has in it, or if the speedo gear has been changed.
Here's a low quality pic. I'll post better ones after next week when I install my bumpers and paint my flares.
Well, it's definitely possible. Run with a GPS and find out for sure if the speedo is accurate. You can do the wheel rotation test to find out your gears if you don't believe the tag on the diff. I know nothing about the speedo gear except that mine should be swapped, but I've driven 4x4's for so long with the speedo being off that I don't even worry about it any more... It's just second nature to adjust for it to me.
Gawd, I've read so much of the road laws for Mass, I've gone cross-eyed. my tires stick out about 2-3", so if I get in trouble, I'll just slap on a cheap set of 6" pocket flares. I actually read that we have a height changing restriction of +/- 2" from stock. But I don't know if the cops would even realize what stock is for most vehicles. Just find a 4x4 friendly inspection location, and you should be golden.
Those road speedometers are notoriously inaccurate because they don't have to be calibrated like the ones police officers use. The other day I went by one that said I was going 24 while my speedometer said I was over 30. Instead, use a GPS or see if a cop would be willing to help you out (had a guy be me clock mine no problems). Also, there is a legal limit of 2% (i think) of speedometer error so take that into account.
__________________ It's got a Willy's body, a Chevy engine, Ford axles, GM transmission, and Dodge steering components... it must be a Wrangler.
A lift will have no affect on your speedometer, its the tire size or gears the would change it.
I have 33s on mine and according to the gps when my speedo says 55mph Im going about 64mph, less miles on the odometer is always a good thing