Hissig Posted April 5, 2020 Share Posted April 5, 2020 So im having terrible clunking when i press my clutch in quick in 1st and 2nd. Its like when the driveline is loaded and deloaded quick it gives of this "clunk-clunk-clunk" . Sounds like something is loose or something. Diff just been overhauled and installed new poly diff mounts all over. Im thinking it could be the transmission mount? Im also having chattering/shuddering on takeoff. Running oem DM flywheel with south bend endurance stage 3. Im up for ideas! ? Have anyone tried the vibra technic mount? I dont want anymore vibration and sound in this car please thanks Quote Link to comment Share on other sites More sharing options...
Swampy442 Posted April 5, 2020 Share Posted April 5, 2020 Poly mounts wont help, but could be your technique? Where is the clunk coming from? Shuddering is the clutch, warped/worn, build up of crap on the friction plate Quote Link to comment Share on other sites More sharing options...
Hissig Posted April 5, 2020 Author Share Posted April 5, 2020 Poly mounts wont help, but could be your technique? Where is the clunk coming from? Shuddering is the clutch, warped/worn, build up of crap on the friction plate Its coming from the gearbox area.. not sure exactly where. Shouldnt be technique I think. I know how to drive a manual My buddy thought it was drive-shaft or the trans mount and not clutch related, hes a former car mechanic so he knows a thing or two. But I guess it could be a bunch of things. It wasnt there before I serviced the diff and changed to poly mounts tho. Its very annoying and have started to get on my nerves Quote Link to comment Share on other sites More sharing options...
Mike2JZ Posted April 5, 2020 Share Posted April 5, 2020 Take a video and upload it Quote Link to comment Share on other sites More sharing options...
Hissig Posted April 8, 2020 Author Share Posted April 8, 2020 This not my video, but the sound is exactly the same. Its not there all the time, i need to push the clutch in quick for it to happen. So when taking of easy its not happening. Quote Link to comment Share on other sites More sharing options...
mc92 Posted April 8, 2020 Share Posted April 8, 2020 I had an old land rover with the same sound, it had a lot of rotational play in the propshaft (aka "driveline lash"). Never bothered trying to fix it because the car wasn't worth anything but that was what I thought it was anyway. Maybe try getting under the car and seeing how much you can rotate the shaft by hand. I don't really know what I'm talking about so I could be wrong though Quote Link to comment Share on other sites More sharing options...
Swampy442 Posted April 8, 2020 Share Posted April 8, 2020 OOooohhhh that doesn't sound good Quote Link to comment Share on other sites More sharing options...
Hissig Posted April 9, 2020 Author Share Posted April 9, 2020 I had an old land rover with the same sound, it had a lot of rotational play in the propshaft (aka "driveline lash"). Never bothered trying to fix it because the car wasn't worth anything but that was what I thought it was anyway. Maybe try getting under the car and seeing how much you can rotate the shaft by hand. I don't really know what I'm talking about so I could be wrong though There is a lot of slop in the driveline. So sometimes i can hear a "clack" sound when letting off. But i think this clunking is something else. And no it does not sound good at all! I`ll have to get someone look or film the car from underneath while the car is on stands or on a ramp and check. Quote Link to comment Share on other sites More sharing options...
Swampy442 Posted April 9, 2020 Share Posted April 9, 2020 You definitely need to get it up in the air, check the prop shaft, centre bearing etc. Has the diff been rebuilt? The gearbox? Quote Link to comment Share on other sites More sharing options...
Style Posted April 9, 2020 Share Posted April 9, 2020 Have you been underneath the car to check the prop shaft for play? Could be centre bearing as Swampy said or maybe the U joints in the prop are shot, causing things to bounce all over the place Quote Link to comment Share on other sites More sharing options...
Hissig Posted April 9, 2020 Author Share Posted April 9, 2020 Diff has been rebuilt. Propshaft has a lot of play in it when handbrake on and in neutral. But should be somewhat normal on these cars? I dont think the gearbox have been touched. car has 150k miles so gearbox is probably due for a service. But this thing was suddenly there after winter storage and diff rebuild. new poly mounts on diff front and rear. I guess the polys can make other mounts show there weaknesses? Will do a checkup under the car when i have time. Quote Link to comment Share on other sites More sharing options...
squiffy Posted April 9, 2020 Share Posted April 9, 2020 I have the drivetrain / prop clonk coming on and off the power. I've changed flywheel, all diff mounts, gearbox mount, propshaft is fine, and it's still there. There's a little play in the drive shafts. So I'm now thinking mine is in the diff. Was your diff input shaft all set to the right torque? Quote Link to comment Share on other sites More sharing options...
Hissig Posted April 9, 2020 Author Share Posted April 9, 2020 I have the drivetrain / prop clonk coming on and off the power. I've changed flywheel, all diff mounts, gearbox mount, propshaft is fine, and it's still there. There's a little play in the drive shafts. So I'm now thinking mine is in the diff. Was your diff input shaft all set to the right torque? /QUOTE] Im pretty sure it was! The dude who did it has a good reputation in doing diffs and v160s. The on and off power "klank" i can live with. Its been there since i bought the car and it doesnt bother me at all. But this new multiple clunk problem i would like to get rid of. Quote Link to comment Share on other sites More sharing options...
blobbster Posted January 24, 2022 Share Posted January 24, 2022 Hey, I am currently facing the seemingly same clunking noise on my car. Any update/solution here? Quote Link to comment Share on other sites More sharing options...
Hissig Posted January 30, 2022 Author Share Posted January 30, 2022 No sorry issue still there. I'm changing out the engine mounts this winter so time will tell if it will sort it out.. Quote Link to comment Share on other sites More sharing options...
rider Posted January 30, 2022 Share Posted January 30, 2022 One aspect often overlooked is the diff mount at the rear of the sub frame. The rubber goes a bit squishy when its aged and can lead to transmission hop with power on/off. When I did my underside refurb the only parts that looked like they needed doing were the two bushes mounting the rear of the differential. They were very soft and pliable compared to the new OEM replacements. If you can rig a camera underneath then you can check to see if you have any diff rocking/hopping going on. 1 Quote Link to comment Share on other sites More sharing options...
mwilkinson Posted January 30, 2022 Share Posted January 30, 2022 1 hour ago, rider said: One aspect often overlooked is the diff mount at the rear of the sub frame. The rubber goes a bit squishy when its aged and can lead to transmission hop with power on/off. When I did my underside refurb the only parts that looked like they needed doing were the two bushes mounting the rear of the differential. They were very soft and pliable compared to the new OEM replacements. If you can rig a camera underneath then you can check to see if you have any diff rocking/hopping going on. Agree with this. When I replaced mine the old ones looked OK. The rubber wasn't cracked or particularly perished, but the metal part did have some surface rust. When removing them I cut the rubber out and the inside of the rubber had almost turned into a liquid / slime! Clearly this would have substantially reduced their effectiveness, and just shows you can't always judge these things from appearance alone. Quote Link to comment Share on other sites More sharing options...
Hissig Posted February 3, 2022 Author Share Posted February 3, 2022 i think they are indeed liquid filled from factory. Anyways i have new poly bushes in the rear and front of diff. so thats not the issue. Quote Link to comment Share on other sites More sharing options...
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