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Unread 12-27-2013, 11:15 PM   #16
Registered User
1993 ZJ 
Join Date: Jul 2011
Location: placerville, ca
Posts: 255
I installed the v8 poly mounts in my 6cyl mounts. Think i am the only one who has ever done it and documented it. Almost no more vibrations than stock. Then I also yanked out my 42re and installed a nv3550

Much more responsive to the throttle instead of having power going into movement of the motor. The difference is that the poly inserts are twice as much material than the brown dog mounts or the universal poly mounts that you make yourself.

1993 ZJ Clayton long arms with Johnny joints, custom front axle W yota center, D44 chevy outers, fabtech dirtlogic 2.25, front bilsten rear shocks, tacoma rear axle, 4.88, arb rear, 5 speed, poly motor mount inserts, NP241OR 4-1 ,receiver front for xcr 8k winch
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Unread 12-27-2013, 11:22 PM   #17
Registered User
1993 YJ Wrangler 
Join Date: Apr 2005
Location: near St. Louis, mo.
Posts: 1,565
I love my Brown-Dog poly mounts in my 4.0. Feels firm and sporty, not "bad" at all. I hear the 2.5 is a no go though.

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Unread 12-28-2013, 03:57 AM   #18
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1991 YJ Wrangler 
Join Date: Dec 2012
Location: Marietta, GA
Posts: 444
What are these vibrations you speak of? I too have Brown-Dog poly mounts on my 4.0 and an Energy Suspension trans mount and the thing runs smooth.
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Unread 12-28-2013, 06:53 AM   #19
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1994 YJ Wrangler 
Join Date: Aug 2009
Location: Lexington,SC
Posts: 1,767
Yep - my experience as well. A sporty feel is the best descriptor. It feels like a tighter package with the poly mounts.
1994 YJ Wrangler, 4.0, AX15, NP231, 35x12.50x15 BFG KM2s, 4" RC lift, 1" lift Boom Shackles, 1" BL, 4.10 gears, 8.8 LSD in rear and D30 Aussie Locker in front, on-board air conversion, Ramsey RE8000 winch.
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