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Hi, I hope this is the right forum for this. I am doing a resto mod project with my 1956 Willys Pickup. I am in the process of installing a 4.0 from a 2004 Wrangler into it with an AX15 5 speed and Dana 300 transfer case. I rebuilt the AX15 by following the FSM from Jeep Chrysler as well as a few youtube videos. All clearances are spot on. Now that the trans is together I went to bench test it and the shift lever will go through the gears although reverse is slightly harder. I can turn the input shaft by hand in 3rd and 4th gear only. 1st, 2nd, 5th and reverse will not allow me to spin the input shaft by hand. Has anyone come across this before. Just looking for some guidance before I tear this trans apart again. Also note that this was an early AX15 (internal slave) that I have converted to external slave. To do this I bought the newer bellhousing, bearing retainer plate, shift fork as well as changed to the newer style input shaft that uses the 3/4" pilot bearing. It has all new synchros, seals, bearings, synchro keys and synchro snap rings. Thanks for any help you can provide. -Chris