Float a motor

[Dollar Bill]

I believe the front FAM engine mount is an improvement on the original design. Rear FAM, not so much - They allow too much movement.

 

[CarlG]

I was (am) considering using the front FAM with the stock rear motor mounts. What would be the pros and cons of that arrangement?

 

[Art Newland]

Do they look like this?

These are aftermarket front mount springs from JC Whitney or Western Auto or?

That could be them, it's hard to tell for sure. There is a rubber doughnut above and below the cross-member as well. FYI, my coupe had considerable vibration on particularly on deceleration, the others I test drove we worse. I was considering getting at the clutch/flywheel to check or have some balancing done as it seemed to emanate from that part of the car. I read a post here on the Barn somewhere about bad vibs and a fellow mentioned that the most important thing was to isolate the vibs from the frame. I replaceced the castle nut on the front with a nyloc nut so I could experiment with how tight is was without worrying about getting a cotter pin in there. Taking some tension off the front mount made a huge difference... I was very happy.

 

[denis4x4]

I'm using a B front motor mount and FAM on the rear. After 16 years, the rubber becomes hard and the holes are sloppy. Installed new bolts and rubber pucks last week as a part of result of normal wear and tear. I'm not sure I could even try to duplicate this::

With the float a motor mounts my engine shifted far enough forward so that the engine pan bolts could not be removed. I went back to the original mounts and can't tell that the vibration is any worse without them. I will stick with the original mounts.

 

[1955cj5]

That could be them, it's hard to tell for sure. There is a rubber doughnut above and below the cross-member as well. FYI, my coupe had considerable vibration on particularly on deceleration, the others I test drove we worse. I was considering getting at the clutch/flywheel to check or have some balancing done as it seemed to emanate from that part of the car. I read a post here on the Barn somewhere about bad vibs and a fellow mentioned that the most important thing was to isolate the vibs from the frame. I replaceced the castle nut on the front with a nyloc nut so I could experiment with how tight is was without worrying about getting a cotter pin in there. Taking some tension off the front mount made a huge difference... I was very happy.

I did the same thing with the front mount

Made a big difference

We must have read the same post!