Clunk on Acceleration or Deceleration

Clunk on Acceleration or Deceleration

Steps 1-8:

Diagnostic Aids
All manual transmission have gear play that might cause a clunk. If the transmission is suspected of causing the clunk, compare it with a similar vehicle.
An internal clunk in the transmission is usually caused by wear between 2 components, or from improper assembly, which would also cause other symptoms.