87 RX-7

iTrader: (1)

Is there a common failure among engine and or transmission mounts? My car is kind of jerky when changing gears (kind of like I'm being shaked back and forth). I also notice under hard acceleration that the **** kind of moves up and down a little bit. Any suggestions?

misterstyx69

iTrader: (142)

Well,the old mounts are rubber based,so it will flex a bit.
Guys opt for solid mounts to replace the old 25 year old stuff.
Though there is nothing wrong with a rubber replacement mount.
Depending again on if you plan to really go Hog wild in the HP Department too.

RotaryResurrection

iTrader: (8)

Pretty common for passenger side motor mounts and transmission saddle mounts on FC's to go bad and break down.

ricardo.benin

iTrader: (6)

Hi I was wondering if any of you know how to identify a rx7 transmission for a rx7 also were is identification number

87 RX-7

iTrader: (1)

I think I will stick with the rubber ones for now. I'm not going to be pushing much power through (yet). Thanks!

That will be the first one I check! Thanks!

F-111a

Mounts fail with normal age

F-111a

To clarify: It is not unusual for them to fail with age

Akagis_white_comet

iTrader: (4)

To understand why the passenger side mounts fail first, we should look at how the engine turns over. Looking at the front of the engine, it rotates clockwise. This means that the passenger side is being constantly stretched while the driver's side mount is being compressed. This reasoning is above and beyond the primary age-related failure.

Also, I wouldn't necessarily recommend solid engine mounts because there is no 'give' to them. Banzai Racing offers some nice Polyurethane mounts that are highly recommended for stock to streetable-modified cars.

Transmission Identification: Transmission