Lost speedo, abs lights, nav error??

[WBacon]

My nav has been throwing a disk error almost everyday now. Works fine off and on and then will just freeze up. Disk appears fine. That has been happening since september. This morning I am getting on the highway and my speedo drops to zero. Abs light comes on and then the speedo comes back up. Truck never skipped a beat. The abs light has come on before and then gone out with no ill affects. This is the first time it affected the speedo. Any thoughts on this or the nav issue. Truck is finally paid for and just turned 135,000. Time for a new one?!?!

 

[RobertHiltz]

You may have a bad ABS sensor or dirty or loose ABS wire connector.

 

[DBottles]

Vehicle speed sensor on the third member of the rear axle. Less than $50. 00 dealer for part. They sell a lot of these.