1992 Wrangler 4x4 Transfer Case Vacuum?
Hi everyone, i just picked up a YJ last week (first jeep i have owned!) and the 4x4 doesnt like to disengage once you put it in 4x4. so it takes some time to screw around with the 4x4 shifter to get it back into 2wd including driving forward and reverse and vise versa. Well first off the 4x4 light wouldnt come on when in 4x4 so i went underneath to the front axle and found the dash indicator sensor to be disconnected so i plugged it back in. The light stays on even when the selector is in 2wd. I went back underneath when it was in 2wd to see if the driveshaft would spin freely and it does not but the vehicle doesnt buck or anything on the pavement like it does when in 4x4. This vehicle has the 4x4 vacuum system
(heard the vaccum system was pretty crappy until you get the posi lok kit) so i started checking vaccum lines. The weird thing is the lines are not color coated like they should be but instead they are all black in color. well i started tracing lines to their locations and found one of them going to the manifold which was getting manifold vaccum down to the transfer case vacuum switch so thats good, and i found the vent tube also good. So that elimnates it down to the two front vacuum axle connections, now when i check the vacuum conections up in the front when in 2wd or 4wd i find no vaccum coming from either of the vacuum tubes. I want to think its that vacuum module on the transfer case but question is does vaccum get applied all the time to the axle in 2wd or 4wd, or does it only get applied for a second when you select 2wd or 4wd? I dont get how i can drive on the pavement still when that front driveshaft is still some what engaged and not buck or anything when turning, and the 4wd works great when you use it. So another thing im wondering is if only part of the axle is engaged still in 2wd, and if its safe to drive on the pavement when the drifeshaft is like that but doesnt buck or anything unless in 4wd. i'm new to this vaccum stuff and its my first jeep ever! i am a state certified vehicle electrician mechainic (training to be a ASE certified mechanic) at only 19 years old and still learning about stuff please tread easly as im new too jeeps hahaha
! I just want to get this problem fixed until i can get enough money for the posi loc kit which i would much more prefer!
Engine: 4.0L HO
Transfer Case: NP231
Front Axle: Dana 30
Thanks for reading!