BW M-11B shift kit parts or ???

After looking on the forum and searching the web , I was looking for some help on a shift kit or whatever I would need to get my BW Automatic to shift a little crisper . It was rebuilt two years ago and work well.

Anyone that worked in those gear boxes are either in the dirt or or sitting propped up in a chair not knowing their own name


Edited by Heavy 488 - Jun/02/2021 at 7:33pm

As Western Red indicated the M-11B received the valve body upgrades that were included in the shift improvement kit that AMC released in mid year of 68. He's absolutely correct to advise that you simply crank in the vacuum modulator adjustment a few turns at a time to get the shift firmness you desire. This will also move up the shift points at partial throttle. You'll know if you go too far as the shift points will be too high to be comfortable. I would suggest starting with 3 full turns clockwise. You'll need a very thin and short screwdriver so you'll be able to clear the cross member and to get inside the vacuum modulator neck.
You'll be pleased with the outcome but you'll notice a light clunk when shifting into reverse at idle or when the transmission downshifts back to first when slowing down for a stop. This is normal at the increased pressure but the knowledge that the transmission is slipping a lot less during upshifts should make you happy

well looks like you might be wrong again .....found a Transmission man who can do the job! 

well that is the reason I ask on the forum