Once and for all what kind of motor mounts rubber or poly?

aztecgwynn · Feb 25, 2020

So I have a 93 LX car has edelbrock heads, cobra intake, scorpion roller rockers, stock cam, stock 19LB injectors, bbk equal length headers, bbk cold air intake and pro m air meter and has been Dyno tuned fox also has subframe connectors. Car runs great daily driver and I put a ton of miles on car yearly.
I have read and done so much research on poly motor mounts, rubber anchor motor mounts, poly transmission mounts, rubber transmission mounts but have not come to any definite info on any of these issues.
currently I still have the OEM rubber motor mounts but not cracked yet, and debating on changing to new I’m sure motor mounts are tired now after 26 years. But also have heard Anchor brand mounts are terrible as well so no help there.
Now transmission mounts are Energy suspension as are crossmember mounts as well all poly car runs great but I can feel small faint vibration from motor especially when motor revs especially when in neutral. But when running not much vibrations seems to run better at speeds of over 85MPH.
It I also read don’t mix poly and rubber , or either go all poly and deal with small vibrations or go all rubber but beware anchor mounts are junk!! And if you mismatch do rubber trans mounts and use poly motor mounts or vise versa.
Again my car is my daily driver I live in Maricopa county Az but drive my car to San Diego Ca twice a month she is very well kept and clean I get good gas mileage and she’s not abused at all but would like to hear everyone’s opinion on this subject who has gone thru this issue. I am aware I am driving a rattle can that makes all kinds of noise going thru or driving thru roads that are a bit rough or neglected but would like to go without trial and error periods.
My car also has a fairy new T5 I bought new from Summit and an aluminum driveshaft bought in 2017, with clutch still in good shape with great foot pedal feedback. Now axle is a complete different story after 2 years of still looking still looking for someone honest to rebuild my rear axle. I have bought all new parts for axle minus rim and pinion but seems like here in Mesa, Phoenix, Gilbert, Chandler area shops are waaaaaaaaay expensive or too dirty, or seems they say they do axles but when I visit shop they have no axle work going on and not risking paying $1400 in labor for no precise axle work or maybe guy with no experience.
But if any of you have experience with mounts please give me honest opinions what are pros and cons!
Please no solid mount opinions again this is my daily driver!
Again I don’t race my Calypso Green 1993 she is daily driver and sees no track use as well.
Thanks everyone hope to hear opinions soon.

Boostedpimp · Feb 25, 2020

I've never had any install issues with the prothane and energy suspension poly mounts I've used over the years on various foxbodies. My daily driver has energy suspension motor and trans poly mounts and I couldn't tell you if it hurt or helped the ride but the factory rubber mounts were destroyed. They appeared fine but when it came time to actually replace them with the upgraded polys they were actually really bad just couldn't tell from appearance.

If you go poly I would go poly for both the motor and trans mounts... I would also go with energy suspension brand if your using a stock hood still as the prothane I have found raises the motor slightly which caused a clearance issue with the factory hood on one of my cars.

If you haven't yet, I would seriously look into buy some maximum motorsport or steeda subframe connectors and have them welded in. Actually any brand subframe connector as long as they have the cross brace for the seat support will make a drastic difference in the feel of the car, the handing and will eliminate most of the noises or creeks.

Regarding your rear end question, i'd say $1400 for just labor seems really high. I don't know the extent of your issue and labor is expensive here in Jersey but $1400 in just labor to have factory rear refreshed seems crazy.

aztecgwynn · Feb 25, 2020

B

Boostedpimp said:
I've never had any install issues with the prothane and energy suspension poly mounts I've used over the years on various foxbodies. My daily driver has energy suspension motor and trans poly mounts and I couldn't tell you if it hurt or helped the ride but the factory rubber mounts were destroyed. They appeared fine but when it came time to actually replace them with the upgraded polys they were actually really bad just couldn't tell from appearance.

If you go poly I would go poly for both the motor and trans mounts... I would also go with energy suspension brand if your using a stock hood still as the prothane I have found raises the motor slightly which caused a clearance issue with the factory hood on one of my cars.

If you haven't yet, I would seriously look into buy some maximum motorsport or steeda subframe connectors and have them welded in. Actually any brand subframe connector as long as they have the cross brace for the seat support will make a drastic difference in the feel of the car, the handing and will eliminate most of the noises or creeks.

Regarding your rear end question, i'd say $1400 for just labor seems really high. I don't know the extent of your issue and labor is expensive here in Jersey but $1400 in just labor to have factory rear refreshed seems crazy.

Thank you forgot to put that in but I have welded in subframe connectors in there!
Yeah it has me a bit baffled how much these shops asking for rebuild, axle has a bit of play in it now so I know it needs rebuild or service but I am almost done buying all the necessary parts too do a complete rebuild

srtthis · Feb 25, 2020

solids... they really arent as bad as people think. if i wasnt trying to take stress off the side of my block id still be solid and not on motor plates

95BlueStallion · Feb 25, 2020

Everyone is different. I will be ditching my poly mounts and going back to rubber soon. I have a somewhat aggressive cam though, and the vibration has a lot of my car rattling.

2Blue2 · Feb 25, 2020

aztecgwynn said:
Again I don’t race my Calypso Green 1993 she is daily driver and sees no track use as well.

aztecgwynn said:
stock cam,

aztecgwynn said:
but I can feel small faint vibration from motor

You sound like you have answered your own question

Daily Driver = new rubber

I think the stock convertible mount is high durometer rubber compared to the coupe and hatch but became stock for all 3 after late 92

Essn95 · Feb 25, 2020

I tried the rock auto rubber anchor brand and they didn’t even fit on my vert.
Went with energy suspension poly and wish I went with that in the first place. paid about $110 new for them and they went in perfect and perform well. 95 Cobra vert

aztecgwynn · Feb 25, 2020

Essn95 said:
I tried the rock auto rubber anchor brand and they didn’t even fit on my vert.
Went with energy suspension poly and wish I went with that in the first place. paid about $110 new for them and they went in perfect and perform well. 95 Cobra vert

Essn95 this is reason I ask I want to buy rubber mounts but don't want to pay to install rubber mounts and they are junk!
But also don't want poly if I will get vibrations!
Thanks for input I will need to make decision, keep opinion coming please!!!

Essn95 · Feb 25, 2020

Stay clear of anchor if you do. We wasted hours trying to get those to fit. I don’t get any noticeable vibrations that are bothersome

aztecgwynn · Feb 26, 2020

So basically go poly and deal with minor vibrations?
Anchor only company who makes rubber mounts so those are not happening

Essn95 · Feb 26, 2020

Yes go poly.

Mustang5L5 · Feb 26, 2020

With my car, i'm going poly motor mounts and a rubber OEM trans mount.

If OEM rubber mounts were available i would run them, but not sold on the quality of the current aftermarket rubber mounts.

I believe energy suspension models the convertible mounts, which are lower.

Essn95 · Feb 26, 2020

I have a rubber trans mount as stated above. No problems with the mismatch

02 281 GT · Feb 26, 2020

Mustang5L5 said:
With my car, i'm going poly motor mounts and a rubber OEM trans mount.

If OEM rubber mounts were available i would run them, but not sold on the quality of the current aftermarket rubber mounts.

I believe energy suspension models the convertible mounts, which are lower.

I'm not disputing you, and I'm sure I've read it somewhere in the past, but could you go into the reasoning behind not using a poly trans mount? Is there an issue with possible damage to the transmission case?

Mustang5L5 · Feb 26, 2020

02 281 GT said:
I'm not disputing you, and I'm sure I've read it somewhere in the past, but could you go into the reasoning behind not using a poly trans mount? Is there an issue with possible damage to the transmission case?

I believe my logic applies more to solid mounts. I read reports that solid mounts in all three spots could crack a bellhousing. So thr recommendation was to run a mount with some give on the trans.

I’m just going to do the same with poly engine mounts mainly because the engine mounts should control movement, but the rubber mount will absorb any vibrations and allow some give

02 281 GT · Feb 26, 2020

Mustang5L5 said:
I believe my logic applies more to solid mounts. I read reports that solid mounts in all three spots could crack a bellhousing. So thr recommendation was to run a mount with some give on the trans.

I’m just going to do the same with poly engine mounts mainly because the engine mounts should control movement, but the rubber mount will absorb any vibrations and allow some give

Thanks. My car will eventually undergo a refreshing like yours. I want to replace bushings and mounts with poly since all are original.

Potomus Pete · Feb 26, 2020

I have solid motor mounts from LMR . The plate type they have. Recently put them in because my fan was rubbing bad. I like them a lot. Feels very much the same as before with no vibrations to speak of . You do get a direct connection feel at the wheels . My motor sits about two inches higher now. Not that you want them but somebody else might be looking it up. I was looking for info on here before I got them on here and there isnt much

96pushrod · Feb 26, 2020

Imo going from rubber to poly motor/trans mounts isn’t much of a difference.

With how difficult it is to find a quality rubber mounts, you’re better off just going poly anyways.

For the record though, we do a lot of ls swaps (mainly Chevy trucks) and run solid mounts in almost of them. Never get any complaints

7991LXnSHO · Feb 29, 2020

I went with a poly transmission mount when I had the tailshaft busing and driveshaft replaced. I think I may hear some more whine in 3rd, but as I no longer have dronemaster mufflers and have had plenty of power going through the T-5, it may not be anything new. It is less noise than the BBK TB makes as it whistles with IAC, so it’s not a problem. I will not be switching back for street as the car seems tighter on take off.

marcelo · Feb 29, 2020

Energy Susp. Engine and Trans Mount ..all fine ...for a street car I dont recomend the solid .. I had them in ..but just for some days ....didnt like it ..

Once and for all what kind of motor mounts rubber or poly?

aztecgwynn

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Boostedpimp

aztecgwynn

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srtthis

the guy doing it does every local racers rear end

95BlueStallion

My assy trans to myself

2Blue2

will be trying this sex one when I can find it

Essn95

aztecgwynn

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Essn95

aztecgwynn

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Essn95

Mustang5L5

That is…until I whipped out my Bissell

Essn95

02 281 GT

Agreed...My wife has great Boobs

Mustang5L5

That is…until I whipped out my Bissell

02 281 GT

Agreed...My wife has great Boobs

Potomus Pete

I'm still waiting for the fully nude shots

96pushrod

I think they're a little easier to get off

7991LXnSHO

wanna catch the space herp

marcelo

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Once and for all what kind of motor mounts rubber or poly?

Active Member

Attachments

Active Member

the guy doing it does every local racers rear end

My assy trans to myself

will be trying this sex one when I can find it

Active Member

Active Member

That is…until I whipped out my Bissell

Agreed...My wife has great Boobs

That is…until I whipped out my Bissell

Agreed...My wife has great Boobs

I'm still waiting for the fully nude shots

I think they're a little easier to get off

wanna catch the space herp

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