So if my truck was built for Drag Racing what clutch do you recommend since you can't slip a Single and expect it to last long? What you are saying goes against what the clutch builders are saying.

 

I had a ConOFE on my 01,and it was a grabby SOB the way I tried to use it,but when I went ahead and set the Edge on 5 and took off in third slipping the hell out of it at about 2500 then it was fine,too bad about the center bustin out.(well the springs just broke..)

 

Not trying to be an ***, but Peter and Dan both told me not to use a single disc as a pulling clutch. I did and got a full season out of a single disc ceramic clutch. Heck it didnt die til i was in Texas working for Dan. Ask Dan, Kevin, or Peter about how fast a dual disc shifts. If u are absolutely dead set on drag racing a single disc ceramic clutch is the only way to go. I had 30 passes and 5K miles on the clutch i sold to a friend and its now in another 5 speed living and breathing. Manuals are a pain in the *** to keep consistent when drag racing and i know this from first hand experience. And you dont slip a clutch while tryin to launch while drag racing, kinda hard cuz the truck creeps forward and you red light.

 

Then how come I didn't start hearing noise until after my DD went in?


Two words: Line Lock,Or, 3 feet. whichever is easier for you.

 

boy i wish i would have found you guys before i put my clutch in. i drove gassers my whole life, and i put LUK in them and they were great. when i first bought my CTD the clutch was shot and i found a LUK to put in, i sure hope it holds out for a little..............

 

the noise is normal, it is caused by the way southbend designed the center of the clutches to prevent failure. they eliminated some of the springs used to control vibrations and went with dampners instead. i just install my 3250 and it does chatter just a little which is normal for a new southbend dual disc. the newly designed varlairs do it too. not to be a jerk, but i trust Peter at southbend, that man knows his stuff. With that said, just because peter reccomends against doing some thing with a single, doesnt mean it wont work, it just may not last as long as it would if used correctly.

 

So it's the clutch that is making the noise and not gear noise in the transmission correct? Or is the clutch causing more gear noise inside the tranny because of how it is designed?

 

its the clutch, its just not absorbing the vibrations as mush as the stock style springed hubs did. its not that the gears are chattering, its just the clutch discs. at least thats what peter @ southbend has told me

 

If your clutch is moving internally, it is broken, plain and simple. The noise you are hearing is the transmission, since the clutch isnt "absorbing" as much of the vibrations as the stock the noise is amplified in the transmission since the transmission has to absorb that vibration and transfer it through your drive train, that is where your noise is truly coming from. When it comes to the dual discs you are hearing the transmission and the floater plate depending on if the clutch pedal is displaced or not. The newer 3600s and 3250s are alot quieter than the older versions but are not quiet at all.

And you arent being a jerk, i knew the clutch wasnt going to last but both said that 8 pulls would be the end of it, i got quite a bit more out of it and was extremely happy. Being an ex-clutch builder i know what goes into these things and what they are designed to do and not to do.

Back to the hub design, if you look at the gauge of wire used in the stock hub compared to the dual discs and after market heavy duty hubs offered by both ValAir and South Bend, ull notice the aftermarket are nearly 2 times thinker gauge. Now also put into effect that the aftermarket also have double wall hub springs, the inner springs being of the same gauge as the outer springs. I still prefer the solid hub design since there are no "moving" parts in the hub, but they are more aggressive and jerkier but will hold up in the long run. As far as the aftermarket designing these clutches, to be 100% honest they took what already was in place in Class 8 trucks and applied it to our trucks. If you have ever seen a 15 inch 8 spring Spicer clutch you will recognize the hub design. Not bashing on either Dan or Peter but the design was pre-existing. They were innovators in bringing that design to Dodges, Fords, and Chevies so that we can get more out of our trucks. But unlike the semi clutches I know that Peter and Dan both use NEW parts in every clutch they send out. Both have a great product and there is no reason to not trust either one of them.

 

whew.