Repetitive clunking in 4 wheel drive
98 XJ Cherokee, 4.0, Selec-Trac (or whatever you call the one with part
time and full time) Recently, leaving a driveway in the near-freezing rain I pulled the 4x4 handle all the way back into the full-time position. I happened to be accelerating a bit as I did so, and I immediately heard/felt a repetitive clunk-clunk-clunk that appeared to be coming from the transfer case/trans area. I immediately backed off the throttle, and the noise quit. So, again, to experiment I gave it a fair bit of gas and again got the clunk-clunk-clunk sounds. Mind you, this is not the expected clump sound/feel that you get when it engages or disengages properly, but rather is louder and stronger. The front feels like it is engaged, but anytime there is any load on it, such as accelerating (even fairly gently) it gives me the thump-thump-thump. Of course, not knowing what was going on, I dropped it out of 4 and took it home in 2 wheel. I don't know if it could be related, but I just had the head gasket replaced and had a valve job done at the same time. I've put on about 4,000 miles since then and, I'm becoming increasingly dissatisfied with the shop's workmanship, as a relatively trouble-free vehicle has quickly turned into a headache. I may or may not have run the four wheel drive since then. (cant remember, if I did, it was once on snow.) Any help is greatly appreciated. |
Re: Repetitive clunking in 4 wheel drive
Your clunk-clunk-clunk sounds like a U-joint or transfer case mount, but
with a recent valve job think about the exhaust hitting something under the car. Does it feel as if something is hitting the floor? Earle "Jeff" <JeffBallweg@gmail.com> wrote in message news:1166743200.690505.309430@n67g2000cwd.googlegr oups.com... > 98 XJ Cherokee, 4.0, Selec-Trac (or whatever you call the one with part > time and full time) > > Recently, leaving a driveway in the near-freezing rain I pulled the 4x4 > handle all the way back into the full-time position. I happened to be > accelerating a bit as I did so, and I immediately heard/felt a > repetitive clunk-clunk-clunk that appeared to be coming from the > transfer case/trans area. I immediately backed off the throttle, and > the noise quit. So, again, to experiment I gave it a fair bit of gas > and again got the clunk-clunk-clunk sounds. > Mind you, this is not the expected clump sound/feel that you get when > it engages or disengages properly, but rather is louder and stronger. > The front feels like it is engaged, but anytime there is any load on > it, such as accelerating (even fairly gently) it gives me the > thump-thump-thump. > Of course, not knowing what was going on, I dropped it out of 4 and > took it home in 2 wheel. > > I don't know if it could be related, but I just had the head gasket > replaced and had a valve job done at the same time. I've put on about > 4,000 miles since then and, I'm becoming increasingly dissatisfied with > the shop's workmanship, as a relatively trouble-free vehicle has > quickly turned into a headache. I may or may not have run the four > wheel drive since then. (cant remember, if I did, it was once on snow.) > > Any help is greatly appreciated. > |
Re: Repetitive clunking in 4 wheel drive
Your clunk-clunk-clunk sounds like a U-joint or transfer case mount, but
with a recent valve job think about the exhaust hitting something under the car. Does it feel as if something is hitting the floor? Earle "Jeff" <JeffBallweg@gmail.com> wrote in message news:1166743200.690505.309430@n67g2000cwd.googlegr oups.com... > 98 XJ Cherokee, 4.0, Selec-Trac (or whatever you call the one with part > time and full time) > > Recently, leaving a driveway in the near-freezing rain I pulled the 4x4 > handle all the way back into the full-time position. I happened to be > accelerating a bit as I did so, and I immediately heard/felt a > repetitive clunk-clunk-clunk that appeared to be coming from the > transfer case/trans area. I immediately backed off the throttle, and > the noise quit. So, again, to experiment I gave it a fair bit of gas > and again got the clunk-clunk-clunk sounds. > Mind you, this is not the expected clump sound/feel that you get when > it engages or disengages properly, but rather is louder and stronger. > The front feels like it is engaged, but anytime there is any load on > it, such as accelerating (even fairly gently) it gives me the > thump-thump-thump. > Of course, not knowing what was going on, I dropped it out of 4 and > took it home in 2 wheel. > > I don't know if it could be related, but I just had the head gasket > replaced and had a valve job done at the same time. I've put on about > 4,000 miles since then and, I'm becoming increasingly dissatisfied with > the shop's workmanship, as a relatively trouble-free vehicle has > quickly turned into a headache. I may or may not have run the four > wheel drive since then. (cant remember, if I did, it was once on snow.) > > Any help is greatly appreciated. > |
Re: Repetitive clunking in 4 wheel drive
Your clunk-clunk-clunk sounds like a U-joint or transfer case mount, but
with a recent valve job think about the exhaust hitting something under the car. Does it feel as if something is hitting the floor? Earle "Jeff" <JeffBallweg@gmail.com> wrote in message news:1166743200.690505.309430@n67g2000cwd.googlegr oups.com... > 98 XJ Cherokee, 4.0, Selec-Trac (or whatever you call the one with part > time and full time) > > Recently, leaving a driveway in the near-freezing rain I pulled the 4x4 > handle all the way back into the full-time position. I happened to be > accelerating a bit as I did so, and I immediately heard/felt a > repetitive clunk-clunk-clunk that appeared to be coming from the > transfer case/trans area. I immediately backed off the throttle, and > the noise quit. So, again, to experiment I gave it a fair bit of gas > and again got the clunk-clunk-clunk sounds. > Mind you, this is not the expected clump sound/feel that you get when > it engages or disengages properly, but rather is louder and stronger. > The front feels like it is engaged, but anytime there is any load on > it, such as accelerating (even fairly gently) it gives me the > thump-thump-thump. > Of course, not knowing what was going on, I dropped it out of 4 and > took it home in 2 wheel. > > I don't know if it could be related, but I just had the head gasket > replaced and had a valve job done at the same time. I've put on about > 4,000 miles since then and, I'm becoming increasingly dissatisfied with > the shop's workmanship, as a relatively trouble-free vehicle has > quickly turned into a headache. I may or may not have run the four > wheel drive since then. (cant remember, if I did, it was once on snow.) > > Any help is greatly appreciated. > |
Re: Repetitive clunking in 4 wheel drive
Hmm... something hitting the floor... it kinda does feel like that, and
thats about the right speed of thumping too. I'll check it after work and get back to you. Thanks! On Dec 21, 5:56 pm, "Earle Horton" <anglocapitali...@usa.com> wrote: > Your clunk-clunk-clunk sounds like a U-joint or transfer case mount, but > with a recent valve job think about the exhaust hitting something under the > car. Does it feel as if something is hitting the floor? > > Earle > > "Jeff" <JeffBall...@gmail.com> wrote in messagenews:1166743200.690505.309430@n67g2000cwd.g ooglegroups.com... > > > 98 XJ Cherokee, 4.0, Selec-Trac (or whatever you call the one with part > > time and full time) > > > Recently, leaving a driveway in the near-freezing rain I pulled the 4x4 > > handle all the way back into the full-time position. I happened to be > > accelerating a bit as I did so, and I immediately heard/felt a > > repetitive clunk-clunk-clunk that appeared to be coming from the > > transfer case/trans area. I immediately backed off the throttle, and > > the noise quit. So, again, to experiment I gave it a fair bit of gas > > and again got the clunk-clunk-clunk sounds. > > Mind you, this is not the expected clump sound/feel that you get when > > it engages or disengages properly, but rather is louder and stronger. > > The front feels like it is engaged, but anytime there is any load on > > it, such as accelerating (even fairly gently) it gives me the > > thump-thump-thump. > > Of course, not knowing what was going on, I dropped it out of 4 and > > took it home in 2 wheel. > > > I don't know if it could be related, but I just had the head gasket > > replaced and had a valve job done at the same time. I've put on about > > 4,000 miles since then and, I'm becoming increasingly dissatisfied with > > the shop's workmanship, as a relatively trouble-free vehicle has > > quickly turned into a headache. I may or may not have run the four > > wheel drive since then. (cant remember, if I did, it was once on snow.) > > > Any help is greatly appreciated. |
Re: Repetitive clunking in 4 wheel drive
Hmm... something hitting the floor... it kinda does feel like that, and
thats about the right speed of thumping too. I'll check it after work and get back to you. Thanks! On Dec 21, 5:56 pm, "Earle Horton" <anglocapitali...@usa.com> wrote: > Your clunk-clunk-clunk sounds like a U-joint or transfer case mount, but > with a recent valve job think about the exhaust hitting something under the > car. Does it feel as if something is hitting the floor? > > Earle > > "Jeff" <JeffBall...@gmail.com> wrote in messagenews:1166743200.690505.309430@n67g2000cwd.g ooglegroups.com... > > > 98 XJ Cherokee, 4.0, Selec-Trac (or whatever you call the one with part > > time and full time) > > > Recently, leaving a driveway in the near-freezing rain I pulled the 4x4 > > handle all the way back into the full-time position. I happened to be > > accelerating a bit as I did so, and I immediately heard/felt a > > repetitive clunk-clunk-clunk that appeared to be coming from the > > transfer case/trans area. I immediately backed off the throttle, and > > the noise quit. So, again, to experiment I gave it a fair bit of gas > > and again got the clunk-clunk-clunk sounds. > > Mind you, this is not the expected clump sound/feel that you get when > > it engages or disengages properly, but rather is louder and stronger. > > The front feels like it is engaged, but anytime there is any load on > > it, such as accelerating (even fairly gently) it gives me the > > thump-thump-thump. > > Of course, not knowing what was going on, I dropped it out of 4 and > > took it home in 2 wheel. > > > I don't know if it could be related, but I just had the head gasket > > replaced and had a valve job done at the same time. I've put on about > > 4,000 miles since then and, I'm becoming increasingly dissatisfied with > > the shop's workmanship, as a relatively trouble-free vehicle has > > quickly turned into a headache. I may or may not have run the four > > wheel drive since then. (cant remember, if I did, it was once on snow.) > > > Any help is greatly appreciated. |
Re: Repetitive clunking in 4 wheel drive
Hmm... something hitting the floor... it kinda does feel like that, and
thats about the right speed of thumping too. I'll check it after work and get back to you. Thanks! On Dec 21, 5:56 pm, "Earle Horton" <anglocapitali...@usa.com> wrote: > Your clunk-clunk-clunk sounds like a U-joint or transfer case mount, but > with a recent valve job think about the exhaust hitting something under the > car. Does it feel as if something is hitting the floor? > > Earle > > "Jeff" <JeffBall...@gmail.com> wrote in messagenews:1166743200.690505.309430@n67g2000cwd.g ooglegroups.com... > > > 98 XJ Cherokee, 4.0, Selec-Trac (or whatever you call the one with part > > time and full time) > > > Recently, leaving a driveway in the near-freezing rain I pulled the 4x4 > > handle all the way back into the full-time position. I happened to be > > accelerating a bit as I did so, and I immediately heard/felt a > > repetitive clunk-clunk-clunk that appeared to be coming from the > > transfer case/trans area. I immediately backed off the throttle, and > > the noise quit. So, again, to experiment I gave it a fair bit of gas > > and again got the clunk-clunk-clunk sounds. > > Mind you, this is not the expected clump sound/feel that you get when > > it engages or disengages properly, but rather is louder and stronger. > > The front feels like it is engaged, but anytime there is any load on > > it, such as accelerating (even fairly gently) it gives me the > > thump-thump-thump. > > Of course, not knowing what was going on, I dropped it out of 4 and > > took it home in 2 wheel. > > > I don't know if it could be related, but I just had the head gasket > > replaced and had a valve job done at the same time. I've put on about > > 4,000 miles since then and, I'm becoming increasingly dissatisfied with > > the shop's workmanship, as a relatively trouble-free vehicle has > > quickly turned into a headache. I may or may not have run the four > > wheel drive since then. (cant remember, if I did, it was once on snow.) > > > Any help is greatly appreciated. |
Re: Repetitive clunking in 4 wheel drive
"Jeff" <JeffBallweg@gmail.com> wrote in message news:1166743200.690505.309430@n67g2000cwd.googlegr oups.com... > 98 XJ Cherokee, 4.0, Selec-Trac (or whatever you call the one with part > time and full time) > > Recently, leaving a driveway in the near-freezing rain I pulled the 4x4 > handle all the way back into the full-time position. I happened to be > accelerating a bit as I did so, and I immediately heard/felt a > repetitive clunk-clunk-clunk that appeared to be coming from the > transfer case/trans area. I immediately backed off the throttle, and > the noise quit. So, again, to experiment I gave it a fair bit of gas > and again got the clunk-clunk-clunk sounds. > Mind you, this is not the expected clump sound/feel that you get when > it engages or disengages properly, but rather is louder and stronger. > The front feels like it is engaged, but anytime there is any load on > it, such as accelerating (even fairly gently) it gives me the > thump-thump-thump. > Of course, not knowing what was going on, I dropped it out of 4 and > took it home in 2 wheel. > > I don't know if it could be related, but I just had the head gasket > replaced and had a valve job done at the same time. I've put on about > 4,000 miles since then and, I'm becoming increasingly dissatisfied with > the shop's workmanship, as a relatively trouble-free vehicle has > quickly turned into a headache. I may or may not have run the four > wheel drive since then. (cant remember, if I did, it was once on snow.) > > Any help is greatly appreciated. > It is not related. It sounds like a stretched chain in the tcase. The chain stretches when you use 4WD on dry pavement. Well, not just dry, but any pavement where the coefficient of friction is too great for the tires to slip on the ground and release the stress that the tcase builds up. If you really have Full Time 4WD, then your problem could be the viscous coupler in the tcase. |
Re: Repetitive clunking in 4 wheel drive
"Jeff" <JeffBallweg@gmail.com> wrote in message news:1166743200.690505.309430@n67g2000cwd.googlegr oups.com... > 98 XJ Cherokee, 4.0, Selec-Trac (or whatever you call the one with part > time and full time) > > Recently, leaving a driveway in the near-freezing rain I pulled the 4x4 > handle all the way back into the full-time position. I happened to be > accelerating a bit as I did so, and I immediately heard/felt a > repetitive clunk-clunk-clunk that appeared to be coming from the > transfer case/trans area. I immediately backed off the throttle, and > the noise quit. So, again, to experiment I gave it a fair bit of gas > and again got the clunk-clunk-clunk sounds. > Mind you, this is not the expected clump sound/feel that you get when > it engages or disengages properly, but rather is louder and stronger. > The front feels like it is engaged, but anytime there is any load on > it, such as accelerating (even fairly gently) it gives me the > thump-thump-thump. > Of course, not knowing what was going on, I dropped it out of 4 and > took it home in 2 wheel. > > I don't know if it could be related, but I just had the head gasket > replaced and had a valve job done at the same time. I've put on about > 4,000 miles since then and, I'm becoming increasingly dissatisfied with > the shop's workmanship, as a relatively trouble-free vehicle has > quickly turned into a headache. I may or may not have run the four > wheel drive since then. (cant remember, if I did, it was once on snow.) > > Any help is greatly appreciated. > It is not related. It sounds like a stretched chain in the tcase. The chain stretches when you use 4WD on dry pavement. Well, not just dry, but any pavement where the coefficient of friction is too great for the tires to slip on the ground and release the stress that the tcase builds up. If you really have Full Time 4WD, then your problem could be the viscous coupler in the tcase. |
Re: Repetitive clunking in 4 wheel drive
"Jeff" <JeffBallweg@gmail.com> wrote in message news:1166743200.690505.309430@n67g2000cwd.googlegr oups.com... > 98 XJ Cherokee, 4.0, Selec-Trac (or whatever you call the one with part > time and full time) > > Recently, leaving a driveway in the near-freezing rain I pulled the 4x4 > handle all the way back into the full-time position. I happened to be > accelerating a bit as I did so, and I immediately heard/felt a > repetitive clunk-clunk-clunk that appeared to be coming from the > transfer case/trans area. I immediately backed off the throttle, and > the noise quit. So, again, to experiment I gave it a fair bit of gas > and again got the clunk-clunk-clunk sounds. > Mind you, this is not the expected clump sound/feel that you get when > it engages or disengages properly, but rather is louder and stronger. > The front feels like it is engaged, but anytime there is any load on > it, such as accelerating (even fairly gently) it gives me the > thump-thump-thump. > Of course, not knowing what was going on, I dropped it out of 4 and > took it home in 2 wheel. > > I don't know if it could be related, but I just had the head gasket > replaced and had a valve job done at the same time. I've put on about > 4,000 miles since then and, I'm becoming increasingly dissatisfied with > the shop's workmanship, as a relatively trouble-free vehicle has > quickly turned into a headache. I may or may not have run the four > wheel drive since then. (cant remember, if I did, it was once on snow.) > > Any help is greatly appreciated. > It is not related. It sounds like a stretched chain in the tcase. The chain stretches when you use 4WD on dry pavement. Well, not just dry, but any pavement where the coefficient of friction is too great for the tires to slip on the ground and release the stress that the tcase builds up. If you really have Full Time 4WD, then your problem could be the viscous coupler in the tcase. |
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