Rotorhead Posted November 4, 2021 Report Share Posted November 4, 2021 Hello All, I was wondering if anyone has changed rear engine mounts before? I have a 2010 Volvo 780 with a Cummins ISX and Eaton xmsn. I am thinking about changing engine mounts because there is some shaking and a kind of drum roll/thumping noise when you push the accelerator (under load). There is nothing obviously loose. There are a couple places where the exhaust and another part are close to touching the cab or frame. So I was thinking that they could be touching and making the noise if the mounts are in fact bad. I have already replaced bad tie-rod ends and that wasn't it. Thanks, Chuck Quote Link to comment Share on other sites More sharing options...
Darryl&Rita Posted November 4, 2021 Report Share Posted November 4, 2021 Floor jack and wrenches. Add in a little time, and Viola! Done. Quote I have been wrong before, I'll probably be wrong again. 2000 Kenworth T 2000 w/N-14 and 10 speed Gen1 Autoshift, deck built by Star Fabrication 2006 smart fourtwo cdi cabriolet 2007 32.5' Fleetwood QuantumPlease e-mail us here. Link to comment Share on other sites More sharing options...
Rotorhead Posted November 4, 2021 Author Report Share Posted November 4, 2021 Thanks Darry, I am supposing you just support the engine/transmission in the vicinity of the rear mounts? I am going to replace them pretty soon. Even the front one. It can only help as it has a lot of miles. 891,000. Quote Link to comment Share on other sites More sharing options...
rickeieio Posted November 5, 2021 Report Share Posted November 5, 2021 Perhaps yours is different, but our 2001 ISX/Eaton combo had no rear motor mounts. Front motor mounts and tranny mounts only. I would look for evidence of something touching before diving into a large job which might not be the problem. Quote KW T-680, POPEMOBILE Newmar X-Aire, VATICAN Lots of old motorcycles, Moto Guzzi Griso and Spyder F3 currently in the front row Young enough to play in the dirt as a retired farmer. contact me at rickeieio1@comcast.net Link to comment Share on other sites More sharing options...
Rotorhead Posted November 5, 2021 Author Report Share Posted November 5, 2021 Thanks. I certainly will be doing some more looking. I know the cab shocks and bags are no good as well. The bags are leaning towards the drivers side. The leveling valve arm was not attached when I got it but was able to get it to stay back on the ball for now. Probably needs to be replaced. She is a well worn truck. Hahaha. Quote Link to comment Share on other sites More sharing options...
Alie&Jim's Carrilite Posted November 7, 2021 Report Share Posted November 7, 2021 When my clutch was done.... sept 2021, they did the "Rear Engine" mounts as well. They are actually on the transmission. This is on a 1998 Volvo Gen 1. Cummins engine, Rockwell 10sp trans. Quote Jim's Adventures Old Spacecraft.... Who knows whats next Link to comment Share on other sites More sharing options...
Rotorhead Posted November 9, 2021 Author Report Share Posted November 9, 2021 I did find the control arm for the cab air shocks disconnected. So the bags weren’t inflated. And that’s where the majority of my noise was coming from. I have a new leveling valve and can shocks on the way. I still have a kind of knocking noise when moving but haven’t found that yet. Time will reveal it. Hopefully not at an inconvenient time and place. Quote Link to comment Share on other sites More sharing options...
Rotorhead Posted November 12, 2021 Author Report Share Posted November 12, 2021 I also found the carrier bearing for the drive shaft is shot. You can move it up and down a good bit. If you lift it and drop it it clunks. Hopefully no knocking after I get that replaced. Quote Link to comment Share on other sites More sharing options...
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