Polyurethane, good or bad - YotaTech Forums
YotaTech Forums  

Go Back   YotaTech Forums > Toyota SUV & Truck Tech > Newbie Tech Section

Newbie Tech Section Often asked technical questions can be asked here

Polyurethane, good or bad

LinkBack Thread Tools Search this Thread
Old 12-31-2006, 10:54 PM   #1
Contributing Member
Personal Sales Rating: (0)
navyredneck's Avatar
Join Date: May 2006
Location: South Carolina
Posts: 372
Polyurethane, good or bad

What is confusing me is the good vs bad of polyurethane.

Polyurethane is bad for control arm bushings (unless you're a street racer) because the stock rubber mounts absorb more of the constant off-road shock. That's kind of the feel I get from many threads.

Polyurethane is good for replacing body mounts when you do a bodylift because it helps minimize sway and vibrations.

Polyurethane is bad for anti-sway bar bushings because it resists movement more than rubber, making your truck flex less offroad.

I used some polyurethane on my OME shocks when I installed them and as a result, I can sometimes hear squeaks coming from the back of the 4runner, particularly on rough roads. Will there be more squeaks from the poly body mounts if I replace them?
1985 pickup std cab 4wd rebuilt 2.4L 22r by Oregon Engine Rebuilders, RV cam, oversize valves, Weber 34 DGEC, 8k on engine,5 speed, OME shocks N93/N85 front/rear, rear diff breather, Durabak interior, Summit proportioning valve, SR5 cluster mod, 3" RB body lift, warn winch brushguard with harbor freight winch, custom rear bumper, FROR floating rear axle with pickup disc brakes all around
navyredneck is offline   Reply With Quote
Old 01-01-2007, 12:23 PM   #2
Contributing Member
Personal Sales Rating: (0)
mt_goat's Avatar
Join Date: Nov 2002
Location: Oklahoma State
Posts: 10,666
Poly will squeak more than rubber but if you lube them up good with silicone grease (I use dielectric grease mixed with graphite powder) they are fairly quite.

I have poly upper control arm bushings and poly sway bar bushings and poly leaf spring bushings with no squeaks.
93 4X4 ext-cab, auto, SR5, 3.4 V6, supercharged, 2.1" pulley, URD fuel mods, Aquamist WI, IPT valve body mod, dual cases, 4" superlift front, Alcan springs rear, 33 BFG KM2, ARB locked front & rear, 5.29 US Gears, RB 1" Body Lift, TJM T-17, Warn m8000.
mt_goat is offline   Reply With Quote
Old 01-01-2007, 01:31 PM   #3
Contributing Member
Personal Sales Rating: (2)
4Crawler's Avatar
Join Date: Jun 2002
Location: SF Bay Area, CA
Posts: 10,783
Poly only squeaks when there is motion between the part inside the bushing and the bushing itself. If poly body mounts squeak, that means there is something moving (like the body) and that is not good. With the body mount bolts properly tightened, there should be no squeaks. I've run poly bushing for about 9 years now and never had a single squeak:
- http://www.4crawler.com/4x4/CheapTri...shtml#Bushings

Poly is stiffer than rubber and flexes less. Keep the poly greased (I use graphite loaded wheel bearing grease on mine) and it won't squeak. I find it also last longer, I have had a set of rubber spring eye bushings disintegrate in one wheeling trip. Poly bushings last me many years and they seem to flex just fine:

Click the image to open in full size.
1985 Toyota 4Runner SR-5, 22REC engine, dual t-cases, 4.88 gears, dual ARBs, 33x10.50 BFGs or 35x12.50 MTRs
Project: 4Crawler
4Crawler OffRoad - YotaTech discount code
Gettin'Off 4WD Club
4Crawler is offline   Reply With Quote

Similar Threads
Thread Thread Starter Forum Replies Last Post
White tire letters in, or white letters out? Scenic WonderRunner Off Topic Talk 23 10-19-2015 04:18 PM
ENGINE TROUBLE 3vze please help :( smiley52 86-95 Trucks & 4Runners 8 07-11-2015 06:16 AM
Icentropy's $400 4runner build icentropy 86-95 Trucks & 4Runners 4 07-09-2015 10:10 AM
4runner stalling in gear... Do this again please Jnkml 95.5-2004 Tacomas & 96-2002 4Runners 3 07-06-2015 02:20 PM
93 runner build MTLroadierunner 86-95 Trucks & 4Runners 0 07-06-2015 01:17 PM

2002, arm, bad, bar, body, bushing, bushings, control, good, graphite, mounts, poly, polyurethane, squeak, sway, tundra

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

All times are GMT -8. The time now is 08:38 AM.

2010 InternetBrands, Inc.