I run 742 cases and clutch style SG's in all my cars! The best combination IMO! Geof
It was only resting. And it needed to be awakened.Man, talk about one from the dead. This thread was started by me over 3 years ago.
did you figure out whatcha got in your cases?It was only resting. And it needed to be awakened.
did you figure out whatcha got in your cases?
You never know 100% til ya crack em openNo, sounds like I'll have to open the pumpkin up to ID it. I'll get to it shortly, but not yet. From everything I've read it sounds like they are most likely cones in both.
You never know 100% til ya crack em open
If you already have a cone unit and you search out a clutch unit for a street car, you're wasting your money, IMO. The cone units CAN be refurbished. I've done several. As long as everything looks good, all you have to do is chuck the cones up in a brake lathe and remove about .100" from the small end. When they wear, the small ends of the cones come in contact with the outsides of the case and they no longer grip the case. If you remove material from the small ends, this restores the grip that was lost. You need to add an equal amount of shims between the side gears and the cones, though. Although this repair is not covered in any book, it works well and will not cause any problems as long as the rest of the unit is in good shape.
Yup, agree 100%. When the cone bottoms out in the case the cone can no longer grip the sides. Think of it like putting a drinking glass inside another one. When the top glass slides into the bottom one it creates friction. same applies to a cone SG. Now if the top glass is allowed to slide all the way to the bottom, it no longer can "grip" the sides of the bottom glass. By cutting the bottom off the cone you are allowing it to slide farther down there by gripping the sides. At this point you add a shim between the cone and the axle side gear to restore the spring pressure on the cone. I usually cut the cones .080 and add .060 -.080 shim.
If you already have a cone unit and you search out a clutch unit for a street car, you're wasting your money, IMO. The cone units CAN be refurbished. I've done several. As long as everything looks good, all you have to do is chuck the cones up in a brake lathe and remove about .100" from the small end. When they wear, the small ends of the cones come in contact with the outsides of the case and they no longer grip the case. If you remove material from the small ends, this restores the grip that was lost. You need to add an equal amount of shims between the side gears and the cones, though. Although this repair is not covered in any book, it works well and will not cause any problems as long as the rest of the unit is in good shape.
you can pull the fill plug,shine a tiny mag light in there and finger out what kind of sure grip you have or pull one axel...center pin is way different in cone and clutch...i vote clutch...they do better donuts.
I have seven years, 25,000 miles and hundreds of passes on my Auburn cone LSD in a lowly 741 case. It's holding up on a 3700 pound car with drag radials and a 100 HP squirt. Granted its only seeing 430 HP on a 12 second car but it works for this application.