Luvtohunt Posted October 4, 2009 Share Posted October 4, 2009 Put my Comanche in 4 wheel drive tonight, the light never came on, went into four wheel drive. Any idea what causes this? Is it just a burnt out light? Thanks again. Link to comment Share on other sites More sharing options...
Automan2164 Posted October 4, 2009 Share Posted October 4, 2009 I would start with a burnt out light. Are you sure your in 4wd? Rob L. Link to comment Share on other sites More sharing options...
CWLONGSHOT Posted October 4, 2009 Share Posted October 4, 2009 Could very well be a burnt out lite. I also suggest you start there. THEN, if yours is a CAD axle, go take it appear and clean it up. I'll bet its not completely engaging/dis-engaging. This is VERY common and something ALL CAD owners shoulc do every couple years. CW Link to comment Share on other sites More sharing options...
Eagle Posted October 4, 2009 Share Posted October 4, 2009 To repeat a question already asked: Are you sure it went into 4WD? Many years ago, on the way to work during a snow storm, I threw my daily driver into 4WD to get up a particularly steep hill that had not been plowed. The lever went into the 4WD position just like always, but I couldn't make it up the hill. I finally had to give up and take an alternate route. Subsequent checking showed that the vacuum connections on the CAD were shot and it wasn't engaging the axle. The transfer case itself, which is shifted mechanically, was in 4WD, but without the axle being locked the front wasn't doing anything. Both the front axle disconnect and the light are actuated by vacuum. If either doesn't work, I would start by checking for vacuum leaks. Then check for a burned out bulb. Link to comment Share on other sites More sharing options...
Luvtohunt Posted October 4, 2009 Author Share Posted October 4, 2009 To repeat a question already asked: Are you sure it went into 4WD? Many years ago, on the way to work during a snow storm, I threw my daily driver into 4WD to get up a particularly steep hill that had not been plowed. The lever went into the 4WD position just like always, but I couldn't make it up the hill. I finally had to give up and take an alternate route. Subsequent checking showed that the vacuum connections on the CAD were shot and it wasn't engaging the axle. The transfer case itself, which is shifted mechanically, was in 4WD, but without the axle being locked the front wasn't doing anything. Both the front axle disconnect and the light are actuated by vacuum. If either doesn't work, I would start by checking for vacuum leaks. Then check for a burned out bulb. Hi, Yes, it went into 4 wheel drive, had to check it twice myself. Can't remember though, if the 4 wheel drive light use to on when you start the truck or not. Link to comment Share on other sites More sharing options...
maddzz1 Posted October 5, 2009 Share Posted October 5, 2009 If the front drive shaft spins does that mean it is in 4wd, or can the DS spin and it still not be in 4wd? Link to comment Share on other sites More sharing options...
Geonovast Posted October 5, 2009 Share Posted October 5, 2009 Spins... when? If you're under the truck, and the lever is in 4wd, the driveshaft should not be able to move, CAD or not. If it's in 2wd, with a CAD, and the CAD isn't engaged, then the driveshaft will spin by hand. If the lever is in 4wd, or the CAD is locked, the driveshaft will not spin by hand. Link to comment Share on other sites More sharing options...
maddzz1 Posted October 5, 2009 Share Posted October 5, 2009 Spins... when? If you're under the truck, and the lever is in 4wd, the driveshaft should not be able to move, CAD or not. If it's in 2wd, with a CAD, and the CAD isn't engaged, then the driveshaft will spin by hand. If the lever is in 4wd, or the CAD is locked, the driveshaft will not spin by hand. I meant when driving the truck with the shifter in 4hi, like is it possible for the front DS to spinning while driving and still be in 2wd Link to comment Share on other sites More sharing options...
Geonovast Posted October 5, 2009 Share Posted October 5, 2009 If the shifter is in 4 HI, the front shaft will be spinning, however it will not power the front wheels if the CAD is not engaged. Link to comment Share on other sites More sharing options...
CWLONGSHOT Posted October 5, 2009 Share Posted October 5, 2009 If the shifter is in 4 HI, the front shaft will be spinning, however it will not power the front wheels if the CAD is not engaged. Hence my suggestion to GO CHECK YOURS OUT. :shake: :brows: :brows: :brows: CW Link to comment Share on other sites More sharing options...
Luvtohunt Posted October 6, 2009 Author Share Posted October 6, 2009 If the shifter is in 4 HI, the front shaft will be spinning, however it will not power the front wheels if the CAD is not engaged. Sorry for my ignorance, but what is CAD, and how do you know if its engaged? Thank you. Link to comment Share on other sites More sharing options...
CWLONGSHOT Posted October 6, 2009 Share Posted October 6, 2009 CAD is Central Axle Disconnect, Its in the front axle of most pre '93 XJ, MJ and YJ jeeps W/ a 231 T-case. It control's a two piece pass side axle shaft that is connected or dis connected via vacuum (the CAD) and a shift fork that moves a splined collar to connect (Or disconnect) the two axle shaft pieces. It gets dirty and gummed up and dosent fully engage the two shafts. Image Not Found Image Not Found Image Not Found Image Not Found Image Not Found CW Link to comment Share on other sites More sharing options...
mknherhappy Posted October 6, 2009 Share Posted October 6, 2009 CAD is Central Axle Disconnect, Its in the front axle of most pre '93 XJ, MJ and YJ jeeps W/ a 231 T-case. It control's a two piece pass side axle shaft that is connected or dis connected via vacuum (the CAD) and a shift fork that moves a splined collar to connect (Or disconnect) the two axle shaft pieces. It gets dirty and gummed up and dosent fully engage the two shafts. Image Not Found Image Not Found Image Not Found Image Not Found Image Not Found CW How do you clean this? Is it something that someone that is not too mechanically inclined could/can do? Thank you. Link to comment Share on other sites More sharing options...
Pete M Posted October 7, 2009 Share Posted October 7, 2009 the "hardest" part will be squirting on a new gasket so it won't leak oil afterward. While you're pulling the cover off, pull the C-clip, push the fork and collar over to the engaged position, then reattach the C-slip to hold it engaged all the time. Then you'll never have to worry about it being engaged or not. :thumbsup: And in case you're wondering, no, this won't affect your 4wd or 2wd manners except that 4wd will always be there when you pull the lever. :D all modern Jeeps come with a solid axle shaft on that side. The CAD was a mistake that never should have happened. who's got a link to the thread with those pictures? Link to comment Share on other sites More sharing options...
Recommended Posts
Create an account or sign in to comment
You need to be a member in order to leave a comment
Create an account
Sign up for a new account in our community. It's easy!
Register a new accountSign in
Already have an account? Sign in here.
Sign In Now