First post here. Looking forward to being a part of the community. I've owned several jeeps in the past (CJ, YJ, TJ and JK).
I recently acquired an '05 X with the 4.0L and NSG370 6-speed. I'm noticing a weird shift behavior with it. When cold, it shifts relatively ok while maybe slightly notchy into 3rd and 4th. As the transmission warms up, the "notchiness" increases to a slight grind into 3rd, 4th, and 5th. It's not a high-speed gear mismatch screech, but rather a "dut dut dut" feeling as it goes into gear. Of course I figured the synchros were dying. The weird part is I only notice this if I shift under 2500 RPM. If i shift at or above 2500 RPM, it shifts normally. Downshifts are also completely normal at any RPM. I put amsoil synchromesh in it and it improved slightly. There was a significant amount of shavings on the drain plug. About 400 miles later I tried redline MTL and it is pretty much the same as the amsoil. Zero shavings on the drain plug the second time. If the synchros were bad, I'd expect it to get worse at higher RPMs and also have issues downshifting. If I shift slowly (2 sec delay between gears) and rev match, it shifts perfectly. I was told by the seller that the transmission was "redone" last year because it was popping out of gear. I was shown paperwork supporting the trans work. Unfortunately, the paperwork was not specific as to what was done to the transmission.
I feel like I could probably drive it around forever like this without making it worse, as long as I shift slowly. But I still wonder what is going on with it. Any ideas?
I recently acquired an '05 X with the 4.0L and NSG370 6-speed. I'm noticing a weird shift behavior with it. When cold, it shifts relatively ok while maybe slightly notchy into 3rd and 4th. As the transmission warms up, the "notchiness" increases to a slight grind into 3rd, 4th, and 5th. It's not a high-speed gear mismatch screech, but rather a "dut dut dut" feeling as it goes into gear. Of course I figured the synchros were dying. The weird part is I only notice this if I shift under 2500 RPM. If i shift at or above 2500 RPM, it shifts normally. Downshifts are also completely normal at any RPM. I put amsoil synchromesh in it and it improved slightly. There was a significant amount of shavings on the drain plug. About 400 miles later I tried redline MTL and it is pretty much the same as the amsoil. Zero shavings on the drain plug the second time. If the synchros were bad, I'd expect it to get worse at higher RPMs and also have issues downshifting. If I shift slowly (2 sec delay between gears) and rev match, it shifts perfectly. I was told by the seller that the transmission was "redone" last year because it was popping out of gear. I was shown paperwork supporting the trans work. Unfortunately, the paperwork was not specific as to what was done to the transmission.
I feel like I could probably drive it around forever like this without making it worse, as long as I shift slowly. But I still wonder what is going on with it. Any ideas?