Hexagon Classics 411

[Kevin H]

Originally Posted by Philip

Yes, it’s not the only one with a GM 4-speed.

It's weird that they used the same gear shift which only allows selection of 1,2 & D. I suppose it doesn't matter too much because most people would leave in D anyway.

Does that mean the selectable gears are really 2,3 & D with the GM transmission?

Was this GM transmission an original factory fitment?

[Philip]

Originally Posted by Kevin H

It's weird that they used the same gear shift which only allows selection of 1,2 & D. I suppose it doesn't matter too much because most people would leave in D anyway.

Does that mean the selectable gears are really 2,3 & D with the GM transmission?

Was this GM transmission an original factory fitment?

The four-speed conversions using the original style of gear shift that I’ve seen just use the original 1,2 & D; it isn’t a factory fitment.

[Barrie]

I think original 1,2,D arrangement in the cockpit is retained for ease, simplicity, and cost saving.
The engineering involved in changing is too experimental/costly.
Personally I have never seen it done.

However there is a way around it with this device:
https://www.hgmelectronics.com/compu...sport-and-pro/

I have an earlier less sophisticated version of this on my Chrysler 518 transmission.
It enables you to alter change-up speeds and, if you have one, alter at what speed the torque converter lock-up engages. Also lots of other features that I have not been able to investigate yet.