[Mgs] speedo not working 58 MG Magnette

[James Schulte]

Folks,

My speedo stopped working 2 months ago and I'm finally getting to it
today. I seperated the cable from the speedometer. Then I went for a
short ride to feel if the cable was rotating. As it turns out it was
not. So I would deduce from that the following: 1. It bound in the
sheath

 and the cable broke 2. The connection at the tranny is stripped or
broken.

Can I disconnect the cable at the tranny and pull the guts out without
removing the sheath hoping it is still whole? I'm hoping it just needs
cleaning and lubrication. Has any one tried this with success? If the
drive is stripped at the tranny end, what are my options?
The connection to the tranny is different from what I'm use too. It has a
 y or u  shaped bracket holding the cable against the tranny. Do I
loosen the bolt and take the bracket off or ?

Jim Schulte

58 MG Magnette with MGB engine and T35 auto tranny.