going with 373s...how to get speedo working right!!

[Slow5.0]

With the 23 tooth gear, its like 2-3 mph off... not a big deal for a 5 minutes work, and $15. The speedcal is $70.00 (with shipping), and takes a little longer to install...

I have 3.73s I put 23 tooth gear But now when I driving 60 its 57mph , you right 2-3 mph off

 

[MRMATRIX69]

www.brothersperformance.com sells all kinds of speedometer gears for mustangs with rearend gear swaps. Check them out.