Which A833 Case is better for a race application, 307 bearing or 308 bearing case?
I've broke 3 A833's with the 308 so far, sheared all the teeth off third gear on the cluster all three times and they didn't have that many miles on them so the bearings were not worn.
I'm wondering if the smaller bearing might be better?
How many other guys have had this happen? Thanks

Are you racing a standard NP833 or the later O.D. version?
If the O.D. tranny, that is the problem, those teeth are tiny on the cluster gear
I've raced a lot of cars with the standard NP833, both the 23 spline and the Hemi 18 spline trans., at the track as well on the street, I've never heard of anyone breaking the gears like you are

What gear are you in when you do your burnouts?
And what trans - OD unit or non- OD?

It's a standard NP833 non OD with a Hurst Super Comp. with a shorter (camaro) handle, 420hp to rear tire, 4.10 Dana with 28" slick. I also have a rev limiter set at 6000rpm. I Do Burnouts in 2nd.

A heavy car with a violent clutch will find the weakest point in the drive train. You now know that third gear is that point in your car. If you are using a 70's technology clutch with high spring pressures and a grabby disk sell it now and get a light weight adjustable clutch from Hyatt, Advanced, or Boninfante. You will launch better and break less parts. Ignore this advice if you also drive on the street.

EDIT:> I see that some people are using adjustable clutches on the street as well as strip. Just readjusting the base pressure.

Hyatt

Advanced

^^^^^^^^^^THIS^^^^^^^^^^^^^^^^^

You need a new clutch. There isn't a transmission you can buy that you won't break if the clutch is junk.

I suspect you are breaking 23 spline transmissions but in any case 307 or 308 it doesn't matter. Your clutch is killing the gears like posted in the above replies. I have stripped third off of a few 23 spline boxes before I went to an 18 spline box and an adjustable pressure plate with bronze disc.
You might be OK with an 18 spline unit at your horsepower level but as long as you are changing the clutch you might as well bite the bullet and invest in a good clutch. Be prepared though even an entry level clutch will cost you $800-$1000 for an adjustable unit

Gus

Been breaking 18 spline A833's. I've been running the same center force clutch the whole time. What's a good adjustable clutch? Is that what a soft lok clutch is? Thanks for replies.

I am in deep trouble, then. Dan Brewer told me to lift between 2nd and 3rd or I will be replacing 3rd gear a lot.

I've been following the thread in the race section about adjustable clutches like a McLeod Soft Lok, also they are talking about a "clutchtamer" anyone run a clutchtamer? I'm wondering what I should do with my centerforce clutch, switch to an adjustable clutch or maybe try a clutchtamer with it???

other thread in race sec.
https://board.moparts.org/ubbthreads/ubbt...tml#Post2443277

Centerforce are great "street" units, not a good track unit and never has been.

Even after popping for a good clutch the service life of the 833 in any form between checks and freshen ups got old and I still broke parts, went to a GF101 and have never looked back.

Id almost think a predictable good quality 3 finger plate and a std disc that will slip and act like a old slider clutch that gets replaced each winter or twice a year isnt a bad thing depending on ones needs.

But currently with the GF101 im using a semi simple adjustable plate and single disc, id have to dig out paperwork or pics as I cant recall the odd disc im using, one type of material on one side and and another type on the other, pucks, no springs. But the cars stayed in the 6.0s 1/8 for the last three years without replacement.

Just amazing???? Maybe I'm just the luckiest old fart here, or maybe it's something else? I've owned my Roadrunner since brandy new. 50 years of street driving and allot more racing since I'm retired. I've run 23 and 18 spline tranny's. I've used every type of clutch assembly over the years except for an adjustable type. I have NEVER broke a tranny. I currently run an 18 spline that is slick shifted with a Centerforce clutch. I've been running Centerforce for almost ten years. This is with a 3900# car with slicks at the track. The car makes over 600hp. Yah, I must be lucky??????????

And id bet your not launching at 6500 dead hooking, let me drive it and bring a 5 gallon bucket for old parts and a bag of floor dry for the track.

Nope no launching at 6500. I launch between 4900-5200 and DO NOT DEAD HOOK. EVERYONE knows, when racing, something has to slip. Automatic use the converter. Stick cars use the clutch or the slicks. I use the slicks. I don't want to be replacing a clutch every year. MY CHOICE. BUY the way, nobody drives my car except ME..

My street car that I have the centerforce in, I just feather it a good bit by foot and that works well too.

What are + and -'s of a mcleod duel disc clutch?