I am sorry if this questions has been asked a bunch, but I could not find the exact answer I was looking for. Here is the short question. I have a 92 YJ with a 4" RC lift with the TC spacer. Since the install I have had bad vibration problems and the transmission keeps kicking out of 2cnd and 4th gear. I am looking at going to the Advance Adapter SYE and a Tom Woods CV drive shaft. Can I totally get rid of the TC spacer, or do I need to go to a thinner one? The reason I want to get rid of it is because with the TC spacer in, it has dropped the transmission enough that the shifter is hitting on the body of the jeep causing it to not stay in 2cnd or 4th gear. Is my thinking correct that I can totally get rid of the TC spacer?
The springs that came with the lift have a wedge built into them already to rotate the pinion around. I may need to add a little more angle though. Now that I have confirmation that I am heading in the right direction, once I get the TC drop removed and the SYE installed, I can figure out from there how much more I need to rotate the pinion.
If it wasn't popping out of gear before the install then you should check the clearance between the shifter and the tub when it's in those gears. Might need to trim some metal, or remove the lower boot if you installed it.
I have already trimmed the tub behind the shift lever as much as I feel comfortable, but it still is popping out of those gears. I did not think of removing that second boot though. But no matter now since I am going to the SYE. It will take care of all of that.
Just wanted to post a follow up on this thread. I installed a SYE kit from advance adapters and then a new CV drive shaft from Tom Wood's. I removed the transfer case spacer as well in the process. All my problems were solved. I no longer have any vibrations problems in the rear end and with the transfer case spacers gone I no longer have any problems with the transmission shifting into and popping out of gear in 2cnd and forth. Also, I checked the front drive shaft length with the 4" Rough Country lift installed and the transfer case in the stock place. The stock front drive shaft is long enough and has enough travel to give you full flex and not bind. Hope this helps someone else in the future.
One final note. The Advance Adapters SYE kit is top notch. It was easy to install, took about six hours from pulling the jeep in to the test drive when finished. All the instructions were well written with great pictures. I highly recommend this kit to anyone going to install and SYE.