checking overshift

[ScottA]

sweet streamlined R26

is that a race-seat?

[ScottA]

re: overshift

I'm sure everyone is impatient to know...

this:







means this:

In 1st gear with the shift lever held down against the stop, look for 2mm clearance between the cam lobe and up-gear side of the pawl.
In 4th gear with the shift lever held up against the stop, look for 2mm clearance between the cam lobe and the down-gear side of the pawl.

This in each gear, while up-shifting and down-shifting.

clear as mud?
...figured it out all by myself (plus a few beers).

It didn't help that my shift mechanism has about .25mm (.010") clearance, when cold.

but hey, all we need is "enough" clearance, right?

[ScottA]

alright, so... I went ahead and adjusted the overshift by adding shims, which in this case are small precision washers under the heads of the stop screws. Backing out the staked, slot-screws was the hardest part, next to scrounging for suitable washers... but that's what makes all this fun, hmm?

I bought this rotisserie oven off craigslist for just this purpose. Finally get to use it.



The gear cluster was in for shift fork adjustment preview. After removing it again, I installed the input shaft and then the intermediate and output shafts with the shift forks.
2nd attempt succeeded. having the whole gearbox up to temp helped a great deal.



This morning I get to begin the shaft shim calculations. I don't get to use this surplused anvil mic very often... have been looking forward to giving it a try in this application.



-Scott