Wrong speedo gear

[Flyin88LX]

Just realized today,that I got the wrong gear when I put my 3.73's in.
Got the 23 tooth for 4.10's instead of 21 tooth.How far is my speedo off and which way?

 

[trbkrb]

It is slow, but by how much I'm not sure. Probably 5-8 MPH or so. I have 3.73 and a 7 tooth T5 with the 21 tooth gear, and right at about 60MPH my tach is right around 2000 in 5th. My speedo is actually about 4 MPH fast according to radar and my wife's vehicle (speedo reads 60, radar reads 56). Just be careful about exceeding the speed limit!

Hope this helps!

 

[TRWXXA]

Just realized today,that I got the wrong gear when I put my 3.73's in.
Got the 23 tooth for 4.10's instead of 21 tooth.How far is my speedo off and which way?

Your speedo is going to be about 8% to 9% slow (reading about 46 mph at an actual speed of 50 mph). Your tire size will also have some effect on how much your speedo is actually off.