TR3/TR4 speedo

[Tom Bottman <tbotts@mail.vii.com>]

Just finished the restoration of my 59 TR3A. Had hoped that an annoying
habit of the speedo needle to fluctuate in about 10 mph degrees while
driving would be sorted out upon reassembly. Not so. I do have a TR4
trans. Is that the cause? Or is is simply a fault with the speedo, in
which case, is it easy to sort out? Thanks, Tom Bottman