stevenmckey Posted February 14, 2013 Share Posted February 14, 2013 i have a 1989 4x4 4.0l mj and my front driveshaft rotates completely free while the rear one does not have any play what can cause this? and how do i fix it? Link to comment Share on other sites More sharing options...
Alexia Posted February 14, 2013 Share Posted February 14, 2013 That is normal as the front axle is vacuum disconnect at the passenger side. This allows the drive shaft to freely rotate while not engaged in four wheel drive. Link to comment Share on other sites More sharing options...
Geonovast Posted February 14, 2013 Share Posted February 14, 2013 Click Lock the CAD link in my signature, there's some diagrams that explain this. Link to comment Share on other sites More sharing options...
stevenmckey Posted February 15, 2013 Author Share Posted February 15, 2013 OK cause I've got a rotating clunking grinding sound when I'm at stoplights and after i drive and park and idle and no one I've tried to explain that to can give me an answer to what it could be and when in 4 wheel drive the steering gets super jerky to the point the tires screech when I'm turning can anyone tell me if this is one big fix or abunch of costly little things Link to comment Share on other sites More sharing options...
cruiser54 Posted February 15, 2013 Share Posted February 15, 2013 OK cause I've got a rotating clunking grinding sound when I'm at stoplights and after i drive and park and idle and no one I've tried to explain that to can give me an answer to what it could be and when in 4 wheel drive the steering gets super jerky to the point the tires screech when I'm turning can anyone tell me if this is one big fix or abunch of costly little things Is that turning on pavement? Only thing rotating at stops is engine and trans input shaft or torque converter. Do you have a manual or auto trans? Link to comment Share on other sites More sharing options...
mvusse Posted February 15, 2013 Share Posted February 15, 2013 1 - front driveshaft is supposed to spin freely when in 2wd. Front axle shaft is disconnected, front yoke on transfer case is disconnected, so there is nothing there to stop it from doing that. 2 - 4wd IS NOT FOR USE ON DRY PAVEMENT. You noticed it binds the driveline in turns. This is a good way to break an axle shaft, drive shaft or transfer case. It is for mud, snow or deep gravel only. If you can hear the sound when sitting at a stop light, there is nothing turning from the transmission on back, just the engine and what's connected directly to the cranks shaft which would be a torque converter or a clutch depending on transmission. As cruiser asked, what transmission? Link to comment Share on other sites More sharing options...
Exgrayxj Posted February 15, 2013 Share Posted February 15, 2013 (edited) [when in 4 wheel drive the steering gets super jerky to the point the tires screech when I'm turning can anyone tell me if this is one big fix or abunch of costly little things quote] Tires all same size? Edited February 15, 2013 by Exgrayxj Link to comment Share on other sites More sharing options...
stevenmckey Posted February 15, 2013 Author Share Posted February 15, 2013 Its an automatic Link to comment Share on other sites More sharing options...
Geonovast Posted February 15, 2013 Share Posted February 15, 2013 Pull your inspection cover and make sure all 4 TC bolts are tight. I had 2 loosen up on me once, and had a metallic noise from them rubbing on the inspection plate. Link to comment Share on other sites More sharing options...
cruiser54 Posted February 15, 2013 Share Posted February 15, 2013 Pull your inspection cover and make sure all 4 TC bolts are tight. I had 2 loosen up on me once, and had a metallic noise from them rubbing on the inspection plate. Here's how to do it. http://www.cherokeeforum.com/f51/how-fix-flexplate-knocking-125547/ Link to comment Share on other sites More sharing options...
mvusse Posted February 16, 2013 Share Posted February 16, 2013 Pull your inspection cover and make sure all 4 TC bolts are tight. I had 2 loosen up on me once, and had a metallic noise from them rubbing on the inspection plate. That's my guess. When I got Sparkles it was clanking. Turned out all 4 had come loose. Link to comment Share on other sites More sharing options...
cruiser54 Posted February 16, 2013 Share Posted February 16, 2013 That's my guess. When I got Sparkles it was clanking. Turned out all 4 had come loose. I wouldn't leave this stone unturned for sure. Until this is addressed, all bets are off. Link to comment Share on other sites More sharing options...
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