Kingman Posted October 11, 2009 Share Posted October 11, 2009 The past week or so I've been noticing something that's really concerning me on my '88 SE, MT. The first drive of the day I notice that when I disengage the clutch out of first gear (say to shift in to second gear) there's a loud thunk/boom/clang (all in one noise, hard to explain lol). You can feel it in the seats, but I can't feel it in the clutch pedal and it feels like normal while this is going on. Disengaging the clutch the shift in to third gear gives the same noise, sometimes, but no where near as intense as shifting out of first. It sounds like the noise is everywhere underneath. I know that doesn't help but I havent been able to pinpoint where the hell it's coming from, which is why I'm posting this, hoping someone has had this problem or has an idea of what it might be. After a few minutes of driving, the noise is completely gone but I can still feel some "shifting" going on when the clutch is disengaged and then shortly after everything is back to normal. It just seems like the very first shift and the few shifts after that are the main concern. There is no whining in the transmission, either. Just the normal RPM drop in neutral when it's cold. Any ideas? Thanks in advance... Link to comment Share on other sites More sharing options...
KovemaN Posted October 11, 2009 Share Posted October 11, 2009 LSD or locker? Mine gives me some strange thuds when backing out of the driveway cold. I have just attributed it to the LSD action. I seriously need to check the diff juice. Link to comment Share on other sites More sharing options...
nunya Posted October 11, 2009 Share Posted October 11, 2009 U-joint? Had a similar issue everytime I would pull out. Link to comment Share on other sites More sharing options...
Kingman Posted October 12, 2009 Author Share Posted October 12, 2009 Hmmm, I do have an LSD rear end. If it was a U-joint, wouldn't it always thunk when you hit the gas or let off suddenly? Link to comment Share on other sites More sharing options...
nunya Posted October 12, 2009 Share Posted October 12, 2009 Mine honestly only did it when I would pull out from a dead stop, that or was the only time I listened. Link to comment Share on other sites More sharing options...
Danrocks Posted October 12, 2009 Share Posted October 12, 2009 I have the same problem with mine, spoke to a few mechanics at work, they all ay the same thing: clutches in the lsd - replace fluid, if there not too worn, they will come good. backlash in the diff- take it to a diff place to get the backlash adjusted uni joints - sometime u can feel some play in the tailshaft, but not always. when in doubt, take them out and replace them. i changed my diff oil, no change, so the next thing is to replace the uni's. its the cheaper option, and id rather spend $50 bucks to get new uni's, than take it in to a diff place, which would cost a heap more. will post her when i have done it, and let u know if it fixed the problem. Link to comment Share on other sites More sharing options...
morpheus Posted October 13, 2009 Share Posted October 13, 2009 Along with the mentioned above issues, check the transmission mount as well for wear or breakage. If everything checks out ok, including all ovbvious driveline bushines, including balljoints, etc... then you might have and issue inside the transmission, or possibly with the clutch release bearing. Link to comment Share on other sites More sharing options...
94extreme Posted October 13, 2009 Share Posted October 13, 2009 check clutch fluid check tranny fluid -"- u joint -"- TC fluid -"- diff fluid note everything: smell, viscosity, suspension, level.. looseness of any of the other things mentioned above. then come back to report. Link to comment Share on other sites More sharing options...
colbywan Posted October 13, 2009 Share Posted October 13, 2009 You may want to check all your exhaust hangar brackets, they're often overlooked and can cause a wide variety of loud disturbing sounds similar to what you describe. -Colby Link to comment Share on other sites More sharing options...
Kingman Posted October 13, 2009 Author Share Posted October 13, 2009 Thanks for the tips guys. After reading about the rear end issue, I did kind of notice that it seemed to be coming from back there the most. Took a lot of hard listening, but I think that's where it is. Although it may be likely I'm imagining things. I have today off so I'll check around and see what I can find. 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