If running solid motor mounts do you need to have a solid trans mount also?

Regards,

no you dont have to run solid trans mount with a solid motor mount but it is better to keep it the same ... dont however run solid trans mount with rubber motor mounts

You need to run a rubber mount on the trans. Stuff has got to be able to move and flex a little bit. With solid trans mount, you may find a cracked tail-shaft housing somewhere along the way.

Do you mean PU mounts like the energy suspension stuff when you talk about solid mounts?

In my humble opinion solid motor and trans mounts have no place on a correctly built street car, only on full tilt race cars.
But that is just my opinion, and humble at that.

I sure as heck am no expert, but if you're going to solidly mount the engine to the chassis then you're going to experience quite a bit of noise and vibration.

That being the case, why not go a step further and use the engine and transmission as a structural member? You could really improve the rigidity of a ladder bar ch****is, and perhaps the suspension too, by triangulating against that big ole hunk of iron (and/or aluminum).

IIRC, Ferrari did this in the F50. It isn't done more often because of the NHV factor (Noise, Harshness, Vibration), but having solid mounts has pretty much thrown that out the window anyhow.

So, "solid" means no rubber or polyurethane, just metal mounts?

Solid = just straight up metal.

You should be fine with an iron block, I wouldn't trust the typical aluminum cased transmission though. They are not designed to be a structural member.
I have run solid mounts on a street driven car before, it is not as bad as some make it sound. When you are running a solid lifter, high lift, long duration cam, headers, and loud exhaust, you don't notice any more noise. More vibration, maybe but the same applies. You really can tell when you have the go pedal buried, it is hard to describe but the car comes alive, the torque from the engine is applied right through the frame, not lost in some spongy motor mounts.
What is Hot Rodding with out some noise and vibration?

Why do you want to run solid mounts on the street. There really is no reason. If you get the mounts that have the saftey tabs even if the rubber breaks you wont put the engine into the hood and you will still have some vibration dampening.

Chet