Originally Posted By 68LAR
Originally Posted By moparpoolman
Originally Posted By weedburner
Originally Posted By moparpoolman
After seeing the "Soft Lok Thread", I didn't want to hijack so started a new one.
I keep breaking the 18 spline A833, blow all the teeth off third gear on the cluster. Broke 3 in the last 8 years only going to the track about 5 times a year. Car is a 68 Plymouth b body, A833 with a centerforce clutch, 420HP to the rear tires with a 4.10 Dana that I don't drive on the street?
Is an adjustable clutch my answer? What other adjustable clutches like a McLeod Soft Lok are available? The "clutchtamer"
http://clutchtamer.com/
sounds interesting, anyone run one?
I'm wondering what I should do?? Different disc? get away from the cenerforce and go with a regular Ram or Mcleod? switch to an adjustable clutch? or maybe try a clutchtamer with it the centerforce??? The more I research it the more confused I'm getting, HELP?


A SoftLoc style clutch isn't likely to be any easier on your 3rd gear than the Centerforce. The basic problem with both is that they hit their hardest after a WOT shift. That's just a function of them using centrifugal assist as a part of their overall clamp load. The SoftLoc's iron disc makes it even worse as it grabs harder as it gains temperature. If your 833 still has synchros, forget about hi rpm powershifts with that heavy full face iron disc.

Another thing to keep in mind is that going to a lighter flywheel doesn't affect how HARD a clutch hits, it only affects how LONG it can maintain that hard hit.

No need to buy an expensive lightweight clutch. You'll get better results at your power level with a simple ClutchTamer softening the hit of a RAM Powergrip HD. Far less maintenance, no need for a hole in the bellhousing, and more efficient than a SoftLoc style adjustable clutch. I doubt there's a more cost effective way to improve your 60' while softening the hit on your drivetrain at the same time.


The 833's I'm running do not have synchros. One is a "slick shift" and one is a "Liberty pro shift"
What is the best way to be shifting? WOT? Pressing clutch? Tapping clutch? No Clutch?



I still can't see why you are breaking 18 spline transmissions with your horsepower. Doing a burnout in first, second or third has nothing to do with breaking third gear. Clutch types only affect the launch. Once you get moving and into second gear, all clutches are grabbing hard. Very little slippage, if any at all. If you're breaking third gear with a 400+ hp engine, you got something else going on and it ain't the clutch.
I run a slick shifted 18 spline with syncro's. You need to use the clutch to shift. I power shift it at 6000 with no issues. I have shifted it as high as 6500. Seeing no difference in time slips, I went back to the 6000 rpm shift points. I ran a pro shifted 18 spline for a time. Didn't like it much on the street. It also needed to be shifted with a clutch. My car is very simular in weight to yours, but with a 600+hp stroker 440.
I run an 11" Centerforce DFX with an aluminum flywheel. I don't break my tranny's????????? Like I've said before, I must be just lucky after 50 years of driving my car..


X2 on trans shouldn't be breaking