speedometer bounce after six fix

[sglide]

I just had a baker 5thgear put in my 07 street glide and the shop tells me it now has a speedometer bouncing problem.anyone ever see this? Baker drivetrains say they never saw this before.

 

[Chopper]

Welcome to the forum, here's a tech tip from 04, it's for a xl but it's saying pinched wires can cause a speedo needle to bounce, just something they might check incase the sending unit wire got pinched, it's a long shot but don't see how the trans can cause it and doubt the sender went south while just sitting there.

View attachment electrical diagnostic tips battery drain xl ,speedo Erratic xl.pdf