Man that's a tough problem. I have installed Currie, Brown Dog, and Bombproof rubber mounts from MORE and only with the Brown Dogs did I see more vibration.
MML Help
- Thread starter BigGeigs
- Start date
OP
This is technically my wife's car so I am extra bummed...
This^^^^^
You just need to trim a bit off of this is the case. Angle grinder and cutoff disc. You can get in there without removing the mm.
OP
Look from the bottom. It’s very slight but can transfer vibrations. I’ll have to go look at mine again, but I definitely had to trim from underneath.
OP
OP
I think I’m down to:
- maybe the bolt behind the passenger side mount that mounts the bracket to the engine block isn’t tight enough (that bolt is impossible to get to)
- Maybe the bolts to the frame are too tight or the mounts aren’t lined up perfect
- Bad transmission mount (is there a piece of wood under mine?)
- Or these mounts are just way to stiff and I need to go back to OEM with a spacer (really really don’t want to)
OP
This doesn't appear to be my issue. The M.O.R.E. mounts sit almost perfectly flush to the mounting mount.
OP
Moved the fan shroud back up and out of the way. Seems to be vibrating less after re-torqueing the transmission mount, but still vibrating like a SOB at idle. The steering wheel vibrations get worse from 2nd to 3rd, and they're awful in reverse. Are these signs of a bad transmission mount?
Things are rarely as straight forward as you might think the first time through, at least for me. If you are sure you haven’t created metal to metal contact as a result of the MML as suggested above, I’m guessing its the MORE mounts themselves. If you still have the same transmission mount you started with, that seems unlikely to be the culprit. Unfortunately, the only way to test that is to pull them and re-install your originals (or stock style replacements like the Anchor parts you ordered on 1” lift blocks like from Savvy or JKS. I have had good luck with Anchor. The stock style mounts are designed to be much softer both because of air pockets molded in and soft durometer. I’d also expect the 2.5L is more finicky than the inherently balanced 4.0. One more thing; when using lift blocks there are sometimes clearance issues between the frame and/or engine bracket or bolts and the blocks. I had that issue with the JKS blocks and stock style mounts with my 6 cyl.
Random thought...council this with no first hand 2.4 experience...the 4.0 has a crank pulley and most of them are 20 years old and the rubber is checked and shot.
Does the 2.4 have a balancer pulley? And could it be shot and the MML exacerbating the issue?
-Mac
Does the 2.4 have a balancer pulley? And could it be shot and the MML exacerbating the issue?
-Mac
OP
Anchor transmission mount arrived today. I am getting a quote from the guys at T&J Performance (which just happens to be right up the street from me) to install the new transmission mount and double check my work on my MML install. After my driveway battle of the motor mounts, I’m not quite ready to take on another jeep project myself
If everything looks good and the new transmission mount doesn’t change anything, OEM motor mounts and spacers are likely in my future. The idle vibrations are simply too gnarly for a daily driver.
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OP
Sure looks like a piece of wood! If the shop is not familiar with TJ’s, make sure they know to support the trans before removing skid plate.
OP
OP
Final update: got the jeep over to my mechanic today. Had him replace the original transmission mount with one from Anchor and had him check my work on the motor mounts. The OEM mount actually looked visually decent, but the vibrations are WAY better after installation of the new one. Still vibrates more at idle than the OEM motor mounts, but it’s livable now. Need to let my wife drive it now and if she’s okay with the vibes, the MORE mounts will stay on for now. Thanks for the suggestions everyone!
I need to know. Was that a piece of plywood in there? I only have a picture on my small phone.
OP
To my surprise, there was NOT a piece of plywood. The bottom of the transmission mount rubber was discolored in a weird way.
OP
FINAL final update: the vibrations were way too bad with the 1” M.O.R.E. MML, even after replacing the transmission mount. Ended up ordering Anchor motor mounts and the JKS 1” Budget MML and I’m so happy I could cry. The Jeep feels better than ever before.