Troll.

You just won't give up the fact that you didn't know the factory gear ratios. Its funny.

But no matter.

I gave the info a stealership would have given. No need to call. Not like calling them would resolve a modified gear set issue anyway.

To make things easiest you don't need to do anymore than jack up the rear and compare how many times the drive shaft spins in comparison to a tire.

But you say getting a GPS and reading a speedo gear is better than that.

Oh well, fighting with you is pointless.

And I earned my high horse. I put more time into this forum than you understand.

 

Not to continue a brew ha ha, but Gee Oh Dee is kind of in the right on this one. Your speedo matching the GPS only says that someone matched tires, diff gears, and the speedo gear (the right way to do it if you're changing diff gears); so this doesn't really tell you what gears are really in there.

Best way I've ever heard to check gears (without opening the diff to count teeth) was to put a chalk mark on one tire, and feed a zip tie through the u joint in the drive line so it will stay (it's better if it's long enough to contact something so it makes an audible noise demarcating full rotations). Spin the tire two full rotations and count how many times the zip tie ticks the bottom of the vehicle.

6 times= 3:1 gear ratio (i.e. 3.07)
7 times= 3.5:1 (i.e. 3.55)
8 times = 4:1 (i.e. 4.10)
9 times = 4.5 (i.e. 4.56)
etc.

If you're having a hard distinguishing between one gear ratio and another (e.g. 3.90 and 4.10), just up the number of rotations of the tire until you would get a full rotation difference between the two (in the example given, that would be five turns of the tire, producing 19.5 rotations with 3.90 gears, and 20.5 rotations with 4.10 gears).

It's still free, no gear oil on the driveway (unless you're already leaking some), and no time on hold at the dealership. All it really takes is a piece of chalk, a zip tie, some jack stands, and the ability to count (sometimes higher than 10). Oh, and some wheel chocks wouldn't be a bad idea either.

Just saying.

 

Thanks man!