Engine Shaking on D4. HELP ME PLZ.

Hi Everyone.I've been experiencing a BIG Problem
with my VTEC EG8 Civic (AUTOMATIC).I bought it
recently (Second Hand) & now servicing things that
need attending to. Anyhow cruising doing 40-50mph
on the engine starts shimmering
(Front Vibrating) but when I accelerate beyond that
the shimmering stops.
i thought it wasn't a big deal but it started frustrating me
.I decided to check my machanic & he told me it could be
a number of things so this is what I did.-->>>>
I CHANGED.-->>

(1) All the engine mounts
(2) Three (3) Transmission.I thought was
the Transmission thats why I change so many
.I used the Original Honda Transmission Oil
(3) Engine Oil.I used Castrol GTX
(4) Verlosity Joints (axle) L & R Sides

But i'm faced with the same problem
. CAN ANYONE HELP ME OUT HERE.
it's like finding a needle in a hay stack
.I'm all out of options. As well as money
. It's very costly.I need help urgently
. Honda People please I desperately crying out here.