Moss Motors, Ltd

Just finished a gearbox rebuild on my 70"s Midget. The box needed new syncros, 2nd and 3rd gear. The rebuild was straight forward until all was reinstalled and road tested. It will not stay in 3rd gear. I can hold it in, but under acceleration or if the shift lever is not held it will pop out.

I can not fully ingage 3rd gear. 1st, 2dn, and 4th, work ok.

All gears engaged ok on the bench test.

Could this be a result of replacing 3rd gear?

I know I have to pull it back out, does anyone have a suggestion on what to look for when I get the side cover back off?

Excessive end clearance on the layshaft gear or one of the mainshaft gears, offhand. Also check that you got all the various balls and springs right. Good luck. Let us know what you find.

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Motorbill
From Lola to Land Rover, If it's British and has wheels, it's likely I've bloodied me knuckles thereupon

I'm leaning tward the mainshaft gears. Because the shift rods and forks are not adjustable, 3rd gear may not forward (deep) enough into the first motion shaft.

Do you know the correct method for installation of the rear mainshaft bearing. when I first installed it, I pressed it all the way down to the shart sholder. After installation of the mainshaft I noticed the the mainshaft and layshaft gears did not line up. I took out the mainshaft the brought the bearing up reinstalled the mainshaft and tightened down the end nut until the gears lined up.

This may be my problem, how do I measure the correct position of the mainshaft and bearing?