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Old 09-25-2013, 11:08 AM   #1
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MML - Really?

Okay, just how tough is it to install a MML? I'm going to be putting in a JKS 1.25" BL to go with my 2" BB and want to do a 1" MML at the same time. From what people tell me, I get the idea the MML installation is either a piece of cake or the job from hell. I'm mildly mechanically inclined but don't want to get myself in big trouble. What's the straight scoop, you think? Should I do this myself or get it professionally installed?

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Old 09-25-2013, 11:16 AM   #2
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Okay, just how tough is it to install a MML? I'm going to be putting in a JKS 1.25" BL to go with my 2" BB and want to do a 1" MML at the same time. From what people tell me, I get the idea the MML installation is either a piece of cake or the job from hell. I'm mildly mechanically inclined but don't want to get myself in big trouble. What's the straight scoop, you think? Should I do this myself or get it professionally installed?
Do it yourself. It can be a pain but its a fairly easy job.

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Old 09-25-2013, 11:17 AM   #3
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Well, its harder than changing your oil, but not hard as removing the tranny. It really not all that bad if you take your time and you have a good floor jack.
Some may get frustrated if they plan on it being a 10 minute install.

As I remember the biggest unexpected pain was that I had to remove the alternator as part of the process, to get it out of the way to be able to slide the passenger side bolt out.
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Old 09-25-2013, 11:49 AM   #4
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For me, it was a job from hell! I highly recommend having a second set of hands, I did the install myself and it was very tedious. I spent a good deal of time back and forth moving from the bottom of the Jeep to the top of the engine bay during cross bolt alignment...
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Old 09-25-2013, 11:52 AM   #5
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Ok, I'm pretty new to Jeeps.......What's a MML?
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Old 09-25-2013, 11:54 AM   #6
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Motor mount lift
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Old 09-25-2013, 11:55 AM   #7
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Ahh.........thanks!
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Old 09-25-2013, 12:19 PM   #8
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For me, it was a job from hell! I highly recommend having a second set of hands, I did the install myself and it was very tedious. I spent a good deal of time back and forth moving from the bottom of the Jeep to the top of the engine bay during cross bolt alignment...
Agreed. Get a friend to help.
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Old 09-25-2013, 01:07 PM   #9
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it took about 30 minutes to put my brown dog mml in .... but I also don't have a factory air box or a to fight with
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Old 09-25-2013, 01:08 PM   #10
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What does a MML do?
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Old 09-25-2013, 01:16 PM   #11
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A MML does two things... 1) It raises front of engine so the fan height is high enough to match the higher radiator fan shroud height caused by a body lift. And 2) it slightly steepens the drivetrain angle to better match the steepened rear driveshaft angle caused by a suspension lift. That can reduce or eliminate vibrations caused by the driveshaft u-joints working into too steep of an angle.
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Old 09-25-2013, 01:18 PM   #12
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Thanks Jerry!!!
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Old 09-25-2013, 01:21 PM   #13
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I installed the JKS mml many years ago. Biggest pain for me was the long bolt on the driver's side. It hit the AC compressor before it slid out of the mount. Took awhile before I figured out to just remove the other side of the mount from the block. The long bolt went back it from the opposite direction when re-installing.
I also dented my oil pan by not using a big enough piece of wood on the jack.
And...like mentioned...a second set of hands was all but required to get everything all lined up and the bolts back in.

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What does a MML do?
It raises the front of the motor up and pushes the tail housing down a bit, reducing driveline angles. Sometimes enough to avoid a TC drop with the stock driveline set up on small lifts. It also makes room for a high clearance TC skid (tummy tuck) if you are planning to get rid of the earth-brake.
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Old 09-25-2013, 02:30 PM   #14
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Took about an hour and a half to install my Brown Dogs this morning working by myself. Not to bad a job, like mentioned above, the hardest part is getting up and down off the floor...especially for an old guy..
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Old 09-25-2013, 02:56 PM   #15
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Took about an hour, biggest pain was I had to remove the alternator to get to the bolts. Easy job. Do it yourself
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Old 09-25-2013, 03:48 PM   #16
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Quote:
Originally Posted by gyramax View Post
Okay, just how tough is it to install a MML? I'm going to be putting in a JKS 1.25" BL to go with my 2" BB and want to do a 1" MML at the same time. From what people tell me, I get the idea the MML installation is either a piece of cake or the job from hell. I'm mildly mechanically inclined but don't want to get myself in big trouble. What's the straight scoop, you think? Should I do this myself or get it professionally installed?
which MML are you getting. There is a big difference b/w the brown dog full mount and the metal spacer type MML. Brown Dog took me and a buddy 1.5 hrs. I call BS on the .5hr mentioned above. Not being a dick but just don't see it...
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Old 09-25-2013, 04:17 PM   #17
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which MML are you getting. There is a big difference b/w the brown dog full mount and the metal spacer type MML. Brown Dog took me and a buddy 1.5 hrs. I call BS on the .5hr mentioned above. Not being a dick but just don't see it...
It depends on both the MML used and the Jeep.
If your installing a spacer type MML and have a Jeep with AC you have to remove the RH motor mount to get the bolt out, if you don't have AC the spacer type MML's can be done in a half hour with a helper.
Of course the MML's that are a motor mount replacement take longer because your actually replacing both mounts instead of just adding a spacer.
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Old 09-25-2013, 07:43 PM   #18
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which MML are you getting. There is a big difference b/w the brown dog full mount and the metal spacer type MML. Brown Dog took me and a buddy 1.5 hrs. I call BS on the .5hr mentioned above. Not being a dick but just don't see it...
I'll be using the JKS 1" spacer MML
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Old 09-25-2013, 08:12 PM   #19
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Went almost smoothly for me. Get some good extensions and the almighty breaker bar out. The only real big headache was when I had to put it back on with the spacers the one bolt wouldn't bite and we had to play around shifting the motor around, jacking it a little, drop it a little, etc until it went in.

Mini bonus- oil pan is now 1" further away from the rocks

Edit: Just go with the rough country one, literally the same exact thing for 20$ less. It's a block of metal and two bolt extenders.
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Old 09-25-2013, 08:55 PM   #20
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Went almost smoothly for me. Get some good extensions and the almighty breaker bar out. The only real big headache was when I had to put it back on with the spacers the one bolt wouldn't bite and we had to play around shifting the motor around, jacking it a little, drop it a little, etc until it went in.

Mini bonus- oil pan is now 1" further away from the rocks

Edit: Just go with the rough country one, literally the same exact thing for 20$ less. It's a block of metal and two bolt extenders.

Thanks. BTW, I'm ECU 1971. Go Pirates!!
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Old 09-25-2013, 09:05 PM   #21
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it took about 30 minutes to put my brown dog mml in .... but I also don't have a factory air box or a to fight with
meant a/c
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Old 09-26-2013, 04:27 AM   #22
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Just curious why you guys wouldn't go with a true replacement MML instead of the spacer. They are only $85-100 and I'm sure all of our mounts could use the new bushing. It just seem like a better deal for the price.
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Old 09-26-2013, 08:55 AM   #23
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Just curious why you guys wouldn't go with a true replacement MML instead of the spacer. They are only $85-100 and I'm sure all of our mounts could use the new bushing. It just seem like a better deal for the price.
Lifespan of rubber bushings is what, 15 years? Looked mine over before and they were perfectly fine. Not any area where grime can really accumulate and eat away at them so I felt fine with the $50 option.
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Old 09-26-2013, 09:05 AM   #24
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For me, it was a job from hell! I highly recommend having a second set of hands, I did the install myself and it was very tedious. I spent a good deal of time back and forth moving from the bottom of the Jeep to the top of the engine bay during cross bolt alignment...
I agree with this as well. I had my wife come out and help me with the floor jack so I could finally get things to line up.
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Old 09-26-2013, 09:26 AM   #25
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Just curious why you guys wouldn't go with a true replacement MML instead of the spacer.
Having had Currie polyurethane MMLs, M.O.R.E. Bombproof rubber MMLs, and Brown Dog rubber MMLs over the past 17 years with two TJs. I'll go with OE factory rubber mounts with a steel spacer the next time. The factory mounts are just better & don't pass vibration like the others I have used.

As a matter of fact, I need new motor mounts right now. My current Currie polyurethane MMLs (my second set of them over the years) cause more vibrations than I like, so I'm going back to OE Mopar mounts with Savvy's spacer kit. Not to mention the OE rubber motor mounts last a LONG time, they outlast most vehicles. Using spacers makes use of the very good Mopar mounts that work well to isolate vibrations from the engine which the others, in my personal experience, don't do as well.
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Old 09-26-2013, 10:41 AM   #26
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I see, I guess wether it be a car or truck I've always gone aftermarket expecting to get the added vibes because they tend to keep the motor more steady, from my experiences.
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Old 09-26-2013, 11:57 AM   #27
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I went with the JKS spacer mml when my Jeep was practically new. One of the first mods I did. It has been on the Jeep for many years. I check them from time to time and everything is still tight. The original motor mounts on top of the spacers are still in excellent shape.
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Old 09-26-2013, 12:07 PM   #28
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Just curious why you guys wouldn't go with a true replacement MML instead of the spacer. They are only $85-100 and I'm sure all of our mounts could use the new bushing. It just seem like a better deal for the price.

I didn't because if I break (it happens) a motor mount on the trail I can find a stock motor mount relatively easy. If I can break a spacer then I bigger problems....
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Old 09-26-2013, 12:17 PM   #29
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Here is Zone's instruction for installing their 1" spacers to give you an idea of what is involved:

http://4x4media.info/instructions/zon/J5111.pdf
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Old 09-26-2013, 12:20 PM   #30
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Mine was a bit of a pain but was much easier after we realized we forgot to unbolt the Transmission from the skid plate.

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