Hi
I have a '99 OEM manual and the transmission mounts do not match your description. There is one on the subframe inboard of the left front tire, and then a transaxle support on the right rear near the rear engine mount.
So I think you might mean the front engine mount/ mount bracket (probably the cracked part).
O.k.....says here
-remove the engine mount strut - on top of radiator, clearly visible
-install engine support fixture- fancy under hood arrangement. You would need to improvise. Probably jack underneath (be very careful where)
-remove upper engine mount bolts (2 coming up from rubber bushing)
-raise engine to clear the bolt tops
-remove four bolts holding engine mount bracket to engine block
-replace bracket and bolts
-lower engine
-replace mount bolts
-replace engine mount strut
Bracket torque is 43 ft-lb
mount nut torque is 35 ft-lb
Good luck