20-10-2024, 06:56 PM
(This post was last modified: 20-10-2024, 06:57 PM by David Stepney.)
The reason you have to double declutch on the crash 4 speed box is because 3rd and 4th are actually engaged via dog clutches, rather than by sliding pinions (as is 1st and 2nd) This was to give a pair of constant mesh gears that slide together on both the mainshaft and the layshaft, giving what is euphemistically called a 'silent third'. In my experience, dog clutches tend to be less forgiving when changing gear than sliding pinion boxes. My Landrover has dog clutch engagement of 1st and 2nd and that can be a pig when changing down into second.
My own car has a crash 4 speed and is as robust as hell. My only criticism is that changes from 3rd to top and down again can be a bit heavy as one is sliding two gears along two shafts. Otherwise is is a super box to use.
Sage advice: Stick with it.
My own car has a crash 4 speed and is as robust as hell. My only criticism is that changes from 3rd to top and down again can be a bit heavy as one is sliding two gears along two shafts. Otherwise is is a super box to use.
Sage advice: Stick with it.