Some ???s for sled pulling

E

Eastern Diesel

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Im thinking about giving it a try in the season coming up, I know I will need a clutch and I have been looking at the south bend 3850 12cb dual disk what do you all think?

Also my rear is gonna need the factory LS unit rebuilt with new clutchs because sometimes it only spins one wheel, Or should I get a detroit locker?

Any help would be great
 
Smkn97's said:
Im thinking about giving it a try in the season coming up, I know I will need a clutch and I have been looking at the south bend 3850 12cb dual disk what do you all think?

Also my rear is gonna need the factory LS unit rebuilt with new clutchs because sometimes it only spins one wheel, Or should I get a detroit locker?

Any help would be great
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If you have a D80 get a locker, the spider gears are junk!
 
First off get a bigger clutch than that. and zstrokens more than right about the stock D80 gears. Air lockers are the best by far. Pricey but very nice.
 
i have a sb DD 3600 and i love it has not slipped yet under hard sledpulling conditions! But i kinda do wish i would have went with a 3850 just for some extra plate load..
 
If you are only going to pull a few times and not a full season on the track every weekend, then a 3850 would be plenty strong.
 
My buddy had a 3850 SB dd and loved it until he pulled one season with it about 15 pulls and he toasted it. He was only turning like 550hp on a commonrail. So instead he is figuring on going with a triple disk clutch. He talked to south bend and its about the same difficulty as a double disk to shift on the road but people are able to run them alot longer under pulling conditions and street driving conditions. They are a few more buck but you will get about 3x the life out of it. Just my $.02 Like the they say go big or go home.
 
If I did lots of hot rodding on the street I would choose an Detroit. One issue as far as strength of the detroit is, if an axle breaks the recoil will typically wipe out the internals of the detroit. Parts can be purchased to repair them, but typically about 3/4 the cost of a new one. The ARB can handle the shock loading.
 
ARB is nice because whn yuo want an open rearend you got it and when you want to lock it up its as simple as fliping a switch.
 
Im not gonna be a full time puller, Just every once in awhile maybe 10 pulls a year so yall dont think the 3850 12cb will last. I said detroit locker because I know a guy local that has a new one for sale and he wants $500 for it.
 
The CB will be ok, just hope you don't do a lot of back to back hooks, or expect to run a 3.0 charger on the thing.
 
I had a sb 3600 and got maybe 13 hooks from it? So going to go with the 4200 or iron giant. Might as well over build than underbuild.
 
I had two years of daily driving/mild towing , who knows how many 3rd burnouts/launches, and roughly 16-18 pulls on my 3850 12Ceramic Button before having to take it out for a cracked floater plate. :aiwebs_016: Peter said I was the first and only one to crack one of his floaters at the time (Nov. last year). I'm still running the same setup with the exception of a slightly smaller DV set. Peter said the clutch was in great shape and would have stood up to more pulls, but we went ahead and rebuilt it at the time anyways. If your running a 2.5 street class the 3850 12 CB will work just fine 10 hooks:welcome:
 
Fords have a different spider gears. You have the 37 splines.
Correction, also I think it matters if it is an open or not. I ran a whole season on a welded open, the first hook on a posi it popped, and another truck made about a season on a set, put in another and they didn't last 3 hooks. I do believe the posi units are the bad ones.
 
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Im not a fan of SB clutches my cousins truck made a half pass (90 feet) on there single disk and wasted it, had a buddy put a double disk one in his truck made about three passes with it and it now slips. I have 2 a McLoeds and love them, both of those trucks will now have Mcloeds put in. I have a street puller and a comp puller 30x pulls on both of them. The truck that i have the street puller in, is now my tow rig and pull a 40ft inclosed trailer with not one problem. The only thing i will say is the street puller was a little grabby at first till i got broke in.
 
kino_fab said:
If you are only going to pull a few times and not a full season on the track every weekend, then a 3850 would be plenty strong.
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I disagree. I had a brand new 3850DD from southbend. Broke it in for 1000 miles and was very easy on it. No spool ups, burnouts nothing. Decided to do a couple burnouts. Bout a week later, took a buddy for a ride and did a burn out and BOOM! Cya later sprung hub 3850. So i wouldnt suggest one at all. At least not the sprung clutches. They took care of it though with no problems. Dont trust the springs. But other than that sweet clutches
 
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