zeiss150 Posted May 21, 2007 Share Posted May 21, 2007 Ok my Z started squeeking about a week ago and its bugging the crap out of me. It is NOT the breaks! It only does it under acceleration and deceleration. basicly while the drive train is under load. If I put the clutch in the squeek goes away. Is it the tranny? or the differential? or maybe a U-joints? Nothing "feels" wrong. there is no shake or shimmy. I have a 72 240Z with a stock differential (3:54 R180 I think) the Tranny is a 5 speed from a 80 ZX. I'm using the stock drive shaft and half shafts. Any ideas? Thanks, Matt- Quote Link to comment Share on other sites More sharing options...
zeiss150 Posted May 23, 2007 Author Share Posted May 23, 2007 no one has any ideas? .... anyone?!?! Quote Link to comment Share on other sites More sharing options...
MatMan Posted May 23, 2007 Share Posted May 23, 2007 Where is the squeak coming from? Is it constant, or does it get louder as you go faster (RPMs increase)? Do you have AC? Are your fanbelt(s) at the proper tension? Quote Link to comment Share on other sites More sharing options...
zeiss150 Posted May 23, 2007 Author Share Posted May 23, 2007 RPM increase do not have an effect on the squeeking. It's not a belt issue. The squeeking is comming from the drive train. It is either comming from the tranny, u joints, or differential. It only makes the squeeking noise when the car is under load. if I accelerat it squeeks or if I downshift (decelerate, i.e. engine braking). If i put the clutch in the squeeking instantly stops. I don't believe that it is a wheel bearing because there is no squeeking if I just let the car roll with no engine power or braking. It seems to only squeek with "load" on the drive train. Any ideas? Thanks Matt- Quote Link to comment Share on other sites More sharing options...
Zmanco Posted May 23, 2007 Share Posted May 23, 2007 RPM increase do not have an effect on the squeeking.If I understand this correctly, the squeak is only affected by the drivetrain being under load. It is NOT affected by the speed of the car, engine, or what gear you are in. Assuming that's the case, I'd be looking at the non-moving parts of the drive train, such as tranny mounts, engine mounts, diff mounts, etc. The fact that the squeak doesn't change with speed makes me think it's not due to the usual obvious suspects. I'd put it up on stands and check that all the bolts are tight, such as the bell housing, mustache bar, etc. Lastly, I'd be looking for anything that has a recent shine to it . Quote Link to comment Share on other sites More sharing options...
MatMan Posted May 23, 2007 Share Posted May 23, 2007 Is it the 72 drive shaft that had permanent (for lack of a better term) u-joints? Quote Link to comment Share on other sites More sharing options...
bjhines Posted May 24, 2007 Share Posted May 24, 2007 dry or broken universal joints will make squeking noises. Check all of the U-joints... Try oiling them one at a time. You may have to really blast them with penetrating oil to get it under the seals..If the squeak stops then you have found the culprit. please do not assume that the oil will fix the problem. The joints have gone bad if they are squeaking.. oil will stop the noise but it may rapidly accelerate the failure of the joint. It washes bits of broken metal back into the moving parts and then acts like cutting fluid. The joints will fail rapidly even if the oil stops the squeaks. Quote Link to comment Share on other sites More sharing options...
zeiss150 Posted May 24, 2007 Author Share Posted May 24, 2007 thanks for the input guys... Yes I have the original 72 drive shaft with the "permanent" u-joints. I'll check the u-joints. How do you replace the permanent u joints? do you have to have a machine shop press them out? or am I going to need a new drive shaft? What about the half shafts are thoes permanent also? What do I do about thoes? Thanks again guys! Matt Quote Link to comment Share on other sites More sharing options...
rudypoochris Posted May 24, 2007 Share Posted May 24, 2007 T/O bearing? Quote Link to comment Share on other sites More sharing options...
zeiss150 Posted May 24, 2007 Author Share Posted May 24, 2007 no its not the Throwout Bearing... If it was that it would squeek when the clutch was pushed in... and it doesn't. I'm pretty sure that its the drive shaft U joints... How do I replace that? Anyone? Quote Link to comment Share on other sites More sharing options...
Zmanco Posted May 24, 2007 Share Posted May 24, 2007 I'm pretty sure that its the drive shaft U joints... How do I replace that? Anyone?I found a shop that specializes in driveline repair and they pressed the old ones out and put the new ones in. Just a heads up: they used some "generic" joints and there was noticeable play on them. So they had to order some Spicers (I think that was the name) which were fine. Normally I like to do the work myself, but you're going to have to get it balanced anyway, so why not have them do it? Also, I'm confused that you think it's the u-joints. In an earlier post you said that the squeak was not speed dependent. I can't imagine how a squeak from a u-joint WOULDN'T be speed dependent. But hey, if that fixes it, I've learned my "something new" for today Quote Link to comment Share on other sites More sharing options...
ab0z Posted May 25, 2007 Share Posted May 25, 2007 If I understand this correctly, the squeak is only affected by the drivetrain being under load. It is NOT affected by the speed of the car, engine, or what gear you are in. Assuming that's the case, I'd be looking at the non-moving parts of the drive train, such as tranny mounts, engine mounts, diff mounts, etc. The fact that the squeak doesn't change with speed makes me think it's not due to the usual obvious suspects. I'd put it up on stands and check that all the bolts are tight, such as the bell housing, mustache bar, etc. Lastly, I'd be looking for anything that has a recent shine to it . +1 On this point, check the simple stuff. I had a problem almost exactly like you are describing, and I went nuts trying to make it a complicated problem, it turned out I just needed to replace a few worn-out bushings here and there. Hope this helps, and let us know when you find out what it is! Quote Link to comment Share on other sites More sharing options...
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