Speed gear color

[2cams70]

Many thanks for your help
John

No problem John.

Your other option if that doesn't get you where you need to be is to put a 6 tooth gear on the gearbox mainshaft, that is presuming that you have a 7 tooth gear currently fitted. There are only 6 and 7 tooth gears for the mainshaft.

You'd be best staying with whatever speedometer drive / driven gear combinations that Ford used originally. Otherwise you might risk a gear wearing too fast or stripping. I did post on here a while ago a copy of the page from the Cortina parts book that listed the combinations. Not sure how to find it now.

[promotor]

Many thanks for your help
John

No problem John.

Your other option if that doesn't get you where you need to be is to put a 6 tooth gear on the gearbox mainshaft, that is presuming that you have a 7 tooth gear currently fitted. There are only 6 and 7 tooth gears for the mainshaft.

You'd be best staying with whatever speedometer drive / driven gear combinations that Ford used originally. Otherwise you might risk a gear wearing too fast or stripping. I did post on here a while ago a copy of the page from the Cortina parts book that listed the combinations. Not sure how to find it now.

They do strip, the one that is most likely to strip is the white 22 tooth gear and this is the one that was spec'd by Ford for the Anglia. I've stripped plenty of Anglia gearboxes where those are ruined. The profile of the teeth just looks a bit odd.
Ford used 23, 24 & 25 tooth gears with 7 tooth mainshaft gears.
I think with the 6 tooth mainshaft gears it was nearly always a 22 tooth gear. I don't recall any other number of teeth being used on the 6 tooth from factory.
I've seen 23 tooth gears in gearboxes with 6 tooth mainshaft gears and they don't work too well!

[Mrozik]

I think for the moment I may just add 30 & 70 mph stickers to the speedo face.....

[2cams70]

They do strip, the one that is most likely to strip is the white 22 tooth gear and this is the one that was spec'd by Ford for the Anglia. I've stripped plenty of Anglia gearboxes where those are ruined. The profile of the teeth just looks a bit odd.

I know it's just one example but my father's Anglia (totally original with original non-syncro first gear box and 4.125 final drive) never had an issue with speedometer failure. It may just be that the gears look odd because of a design reason and they haven't actually failed. That car did 200,000 miles over it's life. 160,000 before the engine was rebuilt. Admittedly though my father in typical accountant fashion didn't care too much about how well the car ran so long as it did run!!

Gear failure could be caused by other reasons as well - eg. a binding speedo cable.

[promotor]

I think for the moment I may just add 30 & 70 mph stickers to the speedo face.....

25 tooth speedo gear was supplied by Ford as original fitment with a 7 tooth gear so I shouldn't worry about fitting one, if you're concerned about it? Just check your gearbox has a 7 tooth gear. All Elan's had 7 tooth gears AFAIK.

[promotor]

They do strip, the one that is most likely to strip is the white 22 tooth gear and this is the one that was spec'd by Ford for the Anglia. I've stripped plenty of Anglia gearboxes where those are ruined. The profile of the teeth just looks a bit odd.

I know it's just one example but my father's Anglia (totally original with original non-syncro first gear box and 4.125 final drive) never had an issue with speedometer failure. It may just be that the gears look odd because of a design reason and they haven't actually failed. That car did 200,000 miles over it's life. 160,000 before the engine was rebuilt. Admittedly though my father in typical accountant fashion didn't care too much about how well the car ran so long as it did run!!

Gear failure could be caused by other reasons as well - eg. a binding speedo cable.

Valid points there.

I do think Ford changed from the 6&22 for some reason as they also advised you could also use a 7&25 with the same 4.125 diff and 5.60-13 tyres as the cars using 6&22, so I guess they thought the change was worth it.