Fith in five
Posted: Fri May 11, 2018 2:00 pm
Gentlemen and nerds,
Allow me to share a worthwhile mod. to the Lotus five- gearbox.
For many years the downshift from 5th. gear has been very heavy. ( on all three of those I have been involved with )
In other respects I think I have a very nice gearbox these days with some upgrading / developments during a couple of rebuilds through the years addressing different issues.
By reducing preload on the locking pin spring supported by the domed nut in the bottom ( by ca. 30% ) I have now a fifth gear action almost comparable to the other 4 gears. I also rounded of the shape of the contact area of same locking pin. The 135 dg. contact point is now a much smoother round contact.
Yes I know that the contact is still a point, but all the same It felt much smoother when comparing with a surplus bottom shifter shaft.
I was a little apprehensive if it should be prone to jumping out of gear. So far it work very nice.
As I have no access to a large inventory of springs I made a deeper dome nut on my lathe, adding ca 5mm for the spring.
Enjoy
Best regards C.Garde
s muci rpish" releaving the years R
Allow me to share a worthwhile mod. to the Lotus five- gearbox.
For many years the downshift from 5th. gear has been very heavy. ( on all three of those I have been involved with )
In other respects I think I have a very nice gearbox these days with some upgrading / developments during a couple of rebuilds through the years addressing different issues.
By reducing preload on the locking pin spring supported by the domed nut in the bottom ( by ca. 30% ) I have now a fifth gear action almost comparable to the other 4 gears. I also rounded of the shape of the contact area of same locking pin. The 135 dg. contact point is now a much smoother round contact.
Yes I know that the contact is still a point, but all the same It felt much smoother when comparing with a surplus bottom shifter shaft.
I was a little apprehensive if it should be prone to jumping out of gear. So far it work very nice.
As I have no access to a large inventory of springs I made a deeper dome nut on my lathe, adding ca 5mm for the spring.
Enjoy
Best regards C.Garde
s muci rpish" releaving the years R