I've never been able to power shift a diaphragm like a 3 finger. Zooming around on the street, shifting hard, yes. But full throttle, flick the pedal, puch the the radio out of the dash type driving the just simply up to the task. I have a late 70's Hot Rod mag with an article all about clutches, it even bashes GM for using a diaphragm. And it states that all their heavy duty truck app used B&B.

I've never been able to power shift a diaphragm like a 3 finger. Zooming around on the street, shifting hard, yes. But full throttle, flick the pedal, puch the the radio out of the dash type driving the just simply up to the task. I have a late 70's Hot Rod mag with an article all about clutches, it even bashes GM for using a diaphragm. And it states that all their heavy duty truck app used B&B.

I have driven several of 4 speed gm products, They aren't the same as my B&B 833. Most guys aren't laying them out. I can tell you on more than one occasion, you go for a ride with them and they think they are being violent with it, they arn't doing chit. Most times I'll try a couple on the floor, 6000+ rpm violent power shifts resulting in an occasional very nasty missed shift resulting in a heavy ,noisy gear grind. When you do catch them with the normal ash try opening crunch, that happens with my B&B, is more of a slip into the full clamp. For you who say they are fine, go out run your car to 6000 in first, DO NOT LIFT THE GAS PEDAL AT ALL, hit the clutch, while pulling second (thats the easy one for you guys), then tell me how good they are. I just wonder how many of these reviews have really pushed this stuff to the absolute limit, to the point of failure without fear.

Back in the day, when they wrote articles like that, they didn't care about grenading a Hemi or what ever rare expensive machine into little pieces.

Now we put-put around and pound our chest(keyboard)




The diaphragm is a proven street put putter, thanks to years of GM usage.

When an aftermarket mfg, quits using them you can bet its because they are cheaper to mfg, so they can make more money.

a very good friend of mine [R.I.P. Donny] had a 69 camero he built a small block for, out of cast off dirt burner parts.
it was a street car with a 4speed and 4.56 gears, he put one of those vertical gate shifters in.
i don't know what transmission it had, or if he did anything to it, but that thing was a foot to the floor/7000+ rpm terror with no missed shifts !

Maybe you need to go back and read what the OP asked.

ok, another 10.5 B&B. My 2 cents...or a 10.95 (better)

Diaphram (Chivvy) clutches do not belong in a Mopar. McLeod here.

Better get rid of your saginaw power steering pumps then.

Just to clarify that CF and the McLeod twin disc are the only diaphragm clutches that I use on Mopars. They are quite different than a standard Chevy diaphragm clutch. Have a few new B&D setups on the shelf.

So if the diaphragm clutch is such a poor setup why did Chrysler pretty much ditch the B&D for the diaphragm in the 80's? My 87 D150, 91 CTD and 98 Dakota all came with a diaphragm clutch.

So if the diaphragm clutch is such a poor setup why did Chrysler pretty much ditch the B&D for the diaphragm in the 80's? My 87 D150, 91 CTD and 98 Dakota all came with a diaphragm clutch.