Hello MartinFT,

I believe what you hear/feel is the downshift from 3 to 2, probably just as you come to a complete stop when using the brakes? These gearboxes end up in second when you are sitting at a stop and do a quick downshift into first as soon as you touch the accelerator. I'm not sure if the 84 version of the 722 gearbox is the same as my 81 but mine does this also. It isn't a heavy clunk almost as if there is play in the driveline. This I ruled out as the car only has 125K km (~77K mi.) so I doubt if this is the issue.

I found that by increasing the play in the Bowden Cable to ~3mm and turning down the idle speed to about 550 RPM the clunk was reduced significantly.

I haven't been able to track down the problem but I plan to tackle it late next year by changing a spring pack in the gearbox. I'm moving back to Canada in May of 2016 so I have all modifications on hold until after the move and the home construction.

I have purchased a Superior Shift Kit for the 722 and it includes springs to increase or decrease the firmness of the shift.

Superior Transmission - Superior K722A-D

Hope it helps.