I decided to attempt the the mainshaft replacement myself since it was going to cost over 400 bucks to have someone else do it.Advance Adpaters said:Advance Adapters hasn't fallen 'short' on this one - a new shorty GM SM465 to Jeep Dana 18/20 transfer case adapter kit. At 7/8" length, their adapter kit is the shortest on the market, providing a combined transmission-and-adapter length of only 12-7/8".
They didn't stop there. Their adapter is manufactured from a Blanchard ground steel plate and features three transfer case clocking options. These clocking options are at 20, 33, and 40 degree intervals. The clocking options will allow a finely tuned conversion to maximize clearance between the transmission and yoke. To obtain the adapter length of 7/8" a new SM465 main shaft was designed. This new main shaft fits 6 spline drive gears only.
The new GM SM465 to Jeep Dana 18/20 adapter is part number 50-4703. For additional information, please contact Advance Adapters at 800-350-2223 or on the web at http://advanceadapters.com/.
the old 10 spline main shaft with the second gear and third and forth gears syncro on. i dont have a press, here, to get them off so im going to have to take to someone to do for us.