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Old 08-03-2016, 11:44 PM   #1
spadz93

 
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Thudding during moderate accel/bumps

As the title says. Most noticeable in first gear in terms of accelerating. I'm thinking front sway bar end links, but I just wanted to see what everyone else thought. I don't have access to a jack currently (piston on mine took a crap). My initial thought was motor mounts, but those are brand new prothane ones installed less than 3k miles ago and torqued to spec w/ loctite (did it myself with a friends help). Thoughts? If shot, i'm probably going BMR
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Old 08-05-2016, 01:08 PM   #2
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Don't all jump at once guys

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Old 08-05-2016, 01:15 PM   #3
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I'd check the motor mounts like you mentioned, mine just went and it was making a thump on acceleration every once in awhile. I'm actually in the process of finding out some information on BMR motor mounts and came across your post.
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Old 08-05-2016, 01:45 PM   #4
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I replaced them recently, think they could have gone bad that soon already?

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Old 08-05-2016, 01:50 PM   #5
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Maybe they just loosened up a bit while breaking in? I doubt they'd fail so quickly. That's just where I'd start.
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Old 08-05-2016, 03:55 PM   #6
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Fair point. I'll have to get a jack and crawl under. Hopefully I can get away with leaving the wheels on

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Old 08-06-2016, 04:15 PM   #7
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Motor mounts are tight, and the motor doesn't even move when starting up, so that's not it. I turned my wheel side to side and took a look at my end links. They still look bolted in, but it looks like there's cracks around what seems to be a bushing. If this is true, then my worst fear has been recognized (did bushings on my rear trailing arms, nightmare). Maybe transmission mount? I do have a new one sitting around, just have to figure out how to replace it

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Old 08-08-2016, 06:38 AM   #8
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Transmission mount did it. Now I can rip on her again without any thudding or otherwise unsettling sounds. For what it's worth my stock one lasted 76k miles

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Old 08-31-2016, 10:23 AM   #9
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Bumping this. The sound/thud is back. I'm not sure what to tackle next. Also noticed some other things as well:

-Under hard accel, you can feel the shifter move a bit to the right (about 1/4-1/2 an inch). I chalked this up as normal drivetrain movement under load.

-Going over bumps, it seems like my front passenger side thuds a bit, while I don't hear much coming from my front driver side.

Everything on the drivetrain mounts has been checked and torqued, so unless I just got a crap trans mount (I replaced with brand new OEM), or something else is wrong, I'm stumped
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Old 09-01-2016, 07:32 AM   #10
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Whaat about the cracks in the front sway bar bushing?
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Old 09-01-2016, 10:26 AM   #11
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Quote:
Originally Posted by JusticePete View Post
Whaat about the cracks in the front sway bar bushing?
When I looked, it didn't look like cracking per say, but more like straight lines from a manufacturing line or something. I'll try to get a closer look to verify
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Old 09-13-2016, 01:16 PM   #12
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Someone in the other thread mentioned upper front strut mounts since I reused the stock ones when I put my Koni's on. If this is the case, are those easy to replace? Any recommended brands or tools? Coming to the part where I'm just going to start throwing parts at this thing since I can't see what's wrong
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