quick question

Just bought a MK 3 gearbox with a damaged layshaft bearing bore, will a early 750 main case replace it?

John,
As far as I can tell, it would appear that it would do the job, but I have been told that the Mk3 case was beefed up around the bearing area (thicker casting).

john robert bould said:

Just bought a MK 3 gearbox with a damaged layshaft bearing bore, will a early 750 main case replace it?

Click to expand...

Not that it would be any problem to you, but to use a pre-Mk3 case on a Mk3 I think you will have to machine down the case quadrant boss (and bush, or use the Mk3 bush) as the Mk3 quadrant spindle is shorter and also retained by a circlip (and not a bolt and washer as pre Mk3 type) in order to clear the Mk3 gearchange cross-shaft. There would of course also be no provision to fit the Mk3 neutral switch.

Cheers Lads,
This is what the forum is for, Good advice from seasoned Nortoners :!: "LAB INTERNATIONAL RESCUE" 10...4 good buddy!