e21 tranny mounts

[oldskool3]

Hey guys just wondering if the 320i mounts can be used in place of the e30 mounts. I need to change mine and would prefer to go with the solid e21 mounts. Thanks

[blunttech]

Hey guys just wondering if the 320i mounts can be used in place of the e30 mounts. I need to change mine and would prefer to go with the solid e21 mounts. Thanks

yes you can use them but they arent solid.

[oldskool3]

yes you can use them but they arent solid.

Is there anything special about them? I was told they were solid by my bro who used them in his e34

[oldskool3]

found out that uuc bases their mounts off of the 320i mounts:

from understeer.com uuc tranny mount ad

"By maintaining the vibration dampening and deflection properties of the 320i mount..."

"In the past, simply using transmission mounts from a 320i provided some benefit when used in late model BMWs"

http://www.understeer.com/onlinestore-drivetrain.shtml

[Firestorm]

Solid trans mount = bad.

[JasonC]

They are urithane not solid. I wouldn't run solid trans mounts, only solid motor mounts. Which remind's me, i need to get a urithane trans mount for my firebird.

[oldskool3]

Solid trans mount = bad.

Sorry I didn't mean solid I just meant stiffer than the stock e30 rubber bushings

They are urithane not solid. I wouldn't run solid trans mounts, only solid motor mounts. Which remind's me, i need to get a urithane trans mount for my firebird.

I didn't know that bmw made stock eurathane bushings.

So would you recommend the e21 mounts. I am geussing they wouldnt be as stiff/ harsh as the ie urethane trans bushings. I am already running the ie eurthane motor mounts.

Plus my brother has has run the 320 bushings for a year without any problems/ harsh vibrations.

[Mike325]

Why don't you just get the urethaine race or street buchings from understeer?

[oldskool3]

Why don't you just get the urethaine race or street buchings from understeer?

That don't have a set for e30's. I could get eurathane bushings from ie but everyone has told me that they are very harsh and didnt recommend them.

I figured that if the 320i bushings where stiffer that the stock e30 bushings but not as stiff as the ie eurethane bushings they would be the best bet.

[JGood]

That's an opinionated statement that you heard. You won't know until you try them. I would try them, they are easy enough to swap out.

[oldskool3]

You won't know until you try them. I would try them, they are easy enough to swap out.

Thats the plan. Apparently you have to open up the wholes on the cross member a bit an also on the tranny dog ears but I have no problem with that Ill let you know how it goes.

[Teaguer]

You guys are mistaken .

The stock Early E21 320i mounts are rubber NOT eurethane as stated .
They are more desireable because the design and shape of them makes them firmer and hold up better over time .

I have both stock E21 rubber and AGK eurethane E21 mounts on my cars .
Stock for a nice upgrade from worn out mounts and eurethane for a firmer shift feel and more overall NVH .

[oldskool3]

You guys are mistaken .

The stock Early E21 320i mounts are rubber NOT eurethane as stated .
They are more desireable because the design and shape of them makes them firmer and hold up better over time .

I have both stock E21 rubber and AGK eurethane E21 mounts on my cars .
Stock for a nice upgrade from worn out mounts and eurethane for a firmer shift feel and more overall NVH .

I didn't think they where eurethane as I couldn't imagine BMW having eurethane tranny mounts on a car produced in 1978. Did you have to do any mods to get them to fit? How much more harsh is the AGK's Thanks a lot

[Teaguer]

Only mod is to open up the hole in the trans crossbrace .

The increase in NVH was bigger than just uerethane engine mounts ...maybe because they are right under the cabin but they made the biggest difference in noise .

Its still tolerable for me though ...and this is in the M42 which is buzzier than an M20 by a long shot .
If you car is running good then it is tolerable for most of us .
Encountered a bad vacuum leak on the 318 and they were horrible for a few days until I tracked down the leak .

I can get pics by Sat of all three mounts side by side if that will help anyone wanting to see the differences .

Also if you go with the stock E21 mounts there are also the cups available to increase their effectiveness or you can make some up real easily too .

[oldskool3]

Only mod is to open up the hole in the trans crossbrace .

The increase in NVH was bigger than just uerethane engine mounts ...maybe because they are right under the cabin but they made the biggest difference in noise .

Its still tolerable for me though ...and this is in the M42 which is buzzier than an M20 by a long shot .
If you car is running good then it is tolerable for most of us .
Encountered a bad vacuum leak on the 318 and they were horrible for a few days until I tracked down the leak .

I can get pics by Sat of all three mounts side by side if that will help anyone wanting to see the differences .

Also if you go with the stock E21 mounts there are also the cups available to increase their effectiveness or you can make some up real easily too .

I am thinking I will just stick to the earlier e21 mounts as i heard they were stiffer than the later ones. Those with my eutethane motot mount and I think I should be good. I have seen thos pieces that cup the mount and I was thinking I would try and make some, they seem pretty straight forward. For right now I just want to get everything back to together so I can take it out of winter storage. Thanks a lot for the advice/help.