irratic rev counter / speedometer?!

[Gray]

Since Refitting my gearbox I've noticed every so often the rev / speedo needles have a fit when acellerating?!

Can be in any gear, any speed, but almost always on full throttle?

Any ideas peeps?

Ta.

 

[SkidMarx]

Speedo sensor connector plugged in properley?

Earths tight?

Yo blood.

 

[Gray]

ahhhh... My man!!

yep speedo sensor is in and ok, earths ok aswell (I think) haha