Hey Ian got a couple questions for ya if you could help out since my Jeep Techs in the area are clueless. I have a 2001 Jeep TJ 4L with a manual NV3550 transmission. My shifter has become sticky trying to down shift from all gears. People says its my detent plunger. They said I should do a kerosene flush in my transmission. Question 1 have you ever heard of this and is it safe? Question 2 is what fluid I should use out of Mopar NV manual transmission lubricant or NV T350 transaxle lubricant? I've tried Pennzoil synchromesh, Amsoil, and now on RP synchromax and all make my transmission shift funny. Forum guys tells me to do a kerosene flush, grease the detent plunger then put mopar fluid in. Need your help. Thanks