Cone type suregrip refresh

[sixpakchallenger]

Any one every try these shims to rebuild a cone type suregrip?

http://cgi.ebay.com/ebaymotors/ws/eBayISAPI.dll?ViewItem&ssPageName=STRK:MEWAX:IT&item=160313278844

[Chryco Psycho]

Makes no sense to me , where do the shims go & what do they accomplish ?
 if the cone is worn to the point where it bottoms out Before the sides of the cone touch all you can do is machine the end off the cone so it can sit deeper intot the cone & shim up the spring pressure

[sixpakchallenger]

If you machine 0.030 off of the small end of the cone and add the shim between the big end of the cone and the sidegear the cone has effectively gotten larger. In theory it should work.

[jims challenger]

shim goes between the spider gear and the cone to get correct backlash, unfortunately one size doesn't fit all.
I just rebuilt one recently, took .050 off the cones, added .020 shims. mine still had some life (hadn't bottomed out yet), but better safe than sorry.
Jim

[Chryco Psycho]

makes sense ... still have to machine the cone to save it & the case is often badly torn up by the time the cone bottoms

[tactransman]

It's definitely a "band aid" 

[femtnmax]

The ebay shims may work, but as mentioned they may be too thick, then you wasted your money.
In the book "Chrysler Performance Upgrades" by Frank Adkins, on page 22 he discusses reviving cone-type sure grips.   He recommends cutting 0.080 off the ends of the cones, then measure for required shim thickness using a feeler gauge behind each spider gear.  The hardware store will sell steel sheet stock.  Then cut out your own shims and install.
The last one I did this process to, the cast iron case where the cones seated had hard areas of the iron casting that were causing gaulling of the cones.  So eventually the cones would completely wear out.  I repaired the cone type sure grip, and sold the pumkin.  Then I bought a 742 clutch type rear diff where mopar still sells the clutch packs new; don't forget to add the mopar lube additive for clutch type sure grips.

Machining and shimming does extend the life of the cone type sure grip, but it won't last forever.