BCraven1018

So I just replaced both front hubs on my06 ccz71. So everything is fine until I drove it. The dang speedometer is now 3 to for mph faster than actual speed. Wtf happened? Replaced with timken hubs

FFDP

iTrader: (2)

Sounds unrelated to each other.

The ABS can be non functioning but you'll still have the speedo working. Plausible that you have a real VSS issue or the cluster is at fault. Stepper motors are super common issues in those years.

BCraven1018

Hmmm. Well it was fine before and the cluster is only a few weeks old from a circuit board medics rebuild.

2002_Z28_Six_Speed

iTrader: (20)

the front wheel hubs only feed into the ABS. shouldn't affect speedo.

MikeGyver

iTrader: (5)

Did you put smaller tires on the rear at the same time and forgot that you did?

00pooterSS

iTrader: (40)

If the front speed sensors read different than the rear the ABS would freak out. That's how it's designed, it activates when it sees a variance in wheel speeds. So I highly doubt you all the sudden have a speed reading issue do to changing the front sensors.