Got a deal on some solid motor and tranny mounts, also rear diff mount. Anybody use them? Gimme some feedback.

 

i dont think they ride bad. i only have the solid motor mounts. i'm not sure if i should be waiting for something to break or not. in that respect, i regret buying them. it was one of those things. my engine was getting rebuilt and that was the best time to do it. honestly, i wish i had some nice expensive polyurethane mounts.

 

I run solid motor, tranny, and diff mounts and daily drive my RX-7 to and from school every day. Personally, not a big deal at all to me. However, at or above around 55-60 mph the vibrations from the engine and tranny can be felt because of the solid mounts and the car vibrates. Not really a big deal, kinda like a massage But on long distance trips on the freeway it can get annoying, again it still doesn't bother me at all.

 

haha, is that what that vibration was? the other night, i was just cruising on the highway when a Prelude and Boxster flew past me. i started to chase them, but they were pretty much gone. while in higher RPMs it seemed to vibrate like wheels that need an alignment. maybe it was the mounts? and i thought rotaries revved smooth!!
my car is daily driven as well. aint no thang.

 

I had bought the same mounts but when i gave them to my mechanic who put in after my engine was done being rebuilt, he told me that they would be a bad idea for a daily driver and I wouldnt gte a noticeable gain in anything to justify them.

 

I'm running competition polyurethane mounts and I think they're really the best compromise for street/light track duty. Everything feels solid and well planted, yet vibration is at a minimum. I don't think solid mounts would be much fun on the street...

 

Probably. But to be honest, I ran the solid motor and differential mounts first with stock tranny mounts and I got no *noticeable* vibration at any speed. After adding the solid tranny mounts, though, it's definitely noticeable though not bad. After that little comparison it is my opinion that the solid tranny mounts make the biggest vibration difference.

 

I always thought it was the added shock stress on the driveline that justified not using solid mounts. You guys seem to just be worried about vibration. That being said I use solid motor mounts and dont feel any abnormal vibration. You notice way more difference in vibration by switching to an aftermarket exhaust I think.

 

lol, put a turbo 302ci in there and run some solid mounts, that would be a nice massage.

 

thats what i was referring to about waiting for something to break. i would say the stress is from the vibration. the motor mounts would transfer the vibration and "soak" it up, whereas now its a straight transfer. this is how i believe it works; i'm no expert on the subject. also to be noted is that this (vibration) is said to be the reason FWD cars (mainly drag that i hear of) break halfshafts. they don't hook up as well and the wheelspin causes a vibration which is apparently very horrible on the drivetrain; halfshafts.
i'm more worried about something breaking than i am the vibration. as far as i'm concerned, the motor mounts themselves are easily streetable.

 

Yeah, well I understand what your saying, but I dont believe its so much the vibration, but the shock that kills solidly mounted drivetrains. If you think about it, when you launch the motor and trany twists slightly...or not so slightly. If it isnt alowed to twist, then that centriphical (sp) force has to be taken up somewhere, and it ends up being your tranny, driveshaft or otherwise. Please someone correct me if my thinkin isnt quite right here.

 

Thanks for all the input. Keep 'em coming!