Question : can your whole drive train set up be to rigid. The IMSA 75 had solid engine mounts with two rubber mounts attached to custom bell housing. One piece carbon prop with rubber coupling upfront ONLY. Bolted gearbox mounts and rubber rear gearbox mount. Pretty rigid . Front coupling takes all the punishment if you think about
![Question :?:](./images/smilies/icon_question.gif)
I had to have a little chuckle to myself.
Years ago when I suggested solid engine mounts, I got laughed out of the joint. Too hard. Too many vibrations. Everything will rattle to pieces and the so on went the negatives even though its a classic make up race cars in the past. Yes its true it wont be as smooth but for pete's sakes it's not a hairdresser's car, it's a race car. SO WHAT !
As for the transmission set up, that's what the Cab runs. One front donut. One piece steel shaft.Bolted front box mounts.Solid ford suspension rear rubber bush. So far on the dyno, the vibration is acceptable but I will let you know what it's like in the real world.
I do know this, removing the three donuts causes the transaxle to rattle at idle and up to around 1500 rpm or so. It's of no consequence on a race car.