Drag Racing With Clutch Type Sure-grip

To the OP;
>Since nobody mentioned it, the Trac-loc/Tru-Trac/ clutch type
has 4 spiders, and two interlocked and floating crosspins. You can adjust the amount of slippage with the throttle. So then it becomes more or less an open diff under light throttle, but locks on full throttle and in-between, she also is in-between. This is a very very useful feature in town.
>The cone-type has only two spiders, and one smooooooth cross pin, full-round saddles when new, and a weak-azz retaining pin. When the cones stop working, that diff acts just like an open diff, and when you peg leg it, she turns double what the Speed-O shows. Which often overheats the cross-pin, and it welds to the spiders and shatters the lock pin. If you didn't seize it up too bad, you can still drive it. If the seizure busts loose, the next thing you know the now loose crosspin fires out the back . Well it tries to, but every one that I've seen it only made it part ways out, which promptly stopped the axles from turning................ which is not something you want to have happen at speed.
But if this diff hangs tuff; over the years, eventually the cross pin will hammer out the saddles into ovals, and break the lock-pin.... yada yada yada.
>I have a gathered a collection of these cone-types over the years, and fixed the wallered out saddles with brazed in bushings and new parts as required. Some of them have seen the hammer of my 367HO, on the street only, and some have seen my stock long-bloc 4bbl318. They seem to be holding up quite well. I seem to have about a half a dozen left. At the track, the two times I went; once I used a spool and once I used my clutch-type. I'm done with the spool.
Btw, that clutch type of mine is out of my BILs 66 Coronet. I pulled it out myself, back in the mid-70s. She has been in most of my more powerful SBM cars.
The cone-types are reserved for use in my 318 cars, or for hi-way gears. I tend to drive my cars into the ground, and pull the powertrains for re-purposing, and the bodies go to the shredder.

OOps I see George beat me off the line, again.
I have got to learn to type faster.... lol.