Create bodeplot using transfer functions?

Dear All,

Attached a notebook file related to a Half car model.
Please note at this stage I’d like to create the bode plot just for the Body . That TF is called Transmissibility. As you can see, the TF is shown as a symbolic equation then I have assign the values for each parameters.
As I’m a new Mathematica user, I’m struggling to create Bode plot.
Can anyone of you help me to create it?

Best Regards,

HCM_numerical.nb (199 KB)

My bad, I didn’t assign the variable t0.
Now bode plot is working. The only thing is that its shape it doesn’t look to be correct.
Can anyone of you advise on this result?

HCM_numerical_v2.nb (322 KB)