Speedo Correction

[Pat12p]

to correct the speedometer on a 92 lx 5.0, do you change the gears in the transmissions vehicle speed sensor or a gear behind the speedometer gauge? is a little bit of vibration normal when swapping gears, there seems to be some extra vibration on the highway, but no gear whine. im guessing an aluminum driveshaft might smooth things out?

 

[tjm73]

No speed sensor on a '92 Mustang. They have mechanical speedometers. What gears do you have and what size tires are you running?

You'll need to change a gear on the speedo cable where it plugs into the tailshaft of the transmission.

Vibration should not exist. It's possible teh drive shaft is spinning fast enough to amplify a slight imbalence or maybe a tire has a slight imbalence you never felt before. Yes an aluminum drive shaft will help, but it'd only mask the cause if it's a slight tire/wheel imbalence. Make sure they are "zeroed" and go from their to the driveshaft replacement.