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post #1 of (permalink) Old 10-22-2012, 04:20 PM Thread Starter
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Urethane motor mounts?

A couple of months ago I installed a new rubber/steel transmission mount, and it's broken already. The last three I've gotten were very poor quality. Who has experience with the urethane mounts? What's a reliable source?

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post #2 of (permalink) Old 10-23-2012, 02:48 PM
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Jim,
I use urethane everything and haven't had a problem with them, currently running them in my 1990, been in there for years, am getting ready to put them in my 1989, 258 after the rebuild. If you use the bushings and they are greasable, you have to use non petroleum based grease on em, other than that I don't have a problem, bought em through the mail, can't remember which parts place.

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post #3 of (permalink) Old 10-26-2012, 12:07 PM Thread Starter
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Thanks, Mike. I wish someone could name a good supplier, but the stuff is probably all made by one manufacturer anyway.

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post #4 of (permalink) Old 10-27-2012, 05:21 PM
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Quote:
Originally Posted by Jim_Lou View Post
Thanks, Mike. I wish someone could name a good supplier, but the stuff is probably all made by one manufacturer anyway.
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post #5 of (permalink) Old 10-28-2012, 10:13 AM Thread Starter
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Thanks, Aaron.

Yeah, it's slowed to a crawl. Seems a lot of folks drifted away shortly after JYG and RRich stopped battling each other over electrical minutiae. Lots of people griped about the bickering, but lots more followed every battle. Ah dunno.

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post #6 of (permalink) Old 10-29-2012, 05:52 PM
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I know I'm late replying but I had the same problem with the rubber transmission mounts. After replacing 2 (warranteed) I put in a polyurethane mount and it has been in there since 2000.

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post #7 of (permalink) Old 11-03-2012, 02:18 AM
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I'm not sure I'm a fan of polly.....had a polly bushing bust apart on the Cherokee....with less than 2 years on it....and only 2 trail rides...

Polly is a lot denser than rubber...hence, it transmits a lot more vibration....

Upside to polly....stiff...and not bothered by oils...

Downside....stiff...

Case in point....you don't see very many Baja trucks using polly.

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post #8 of (permalink) Old 11-03-2012, 05:34 AM Thread Starter
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The complaints about the stiffness of poly are common. On my poor old beater I doubt that anyone could tell the difference. I've got to do something, though.

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post #9 of (permalink) Old 11-03-2012, 05:04 PM
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Yeah, poly is a lot harder and it does transmit every vibration. However what I like about it is that it's not destroyed by oil/gas, etc.. That's a good thing. It's not fun to have an left engine mount on a 258 destroy itself on the trail and drop the engine... and punch the oil filter. Nope.. that's not fun at all.

IMHO... it's poly all the way.
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post #10 of (permalink) Old 11-04-2012, 05:55 AM Thread Starter
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Yep. That happened to me once. We had been trail riding in the woods all morning. Pulled up to the gas pump in a little burg and a buddy pointed out that I had an oil leak. I put on a new filter, put a hose clamp around it where the hole had been, and was down a half quart! It must have finally worn through just as I was pulling in.

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