As usual, this is an update - had transmission in and running for two days...and TAS hammering on quarter mile pass.
Just seen that during the short drive I lost the nut to one the rear sway bar links, opposite side of the sway bar loose.

 

Two days of hard driving can break anything..new or old- this time, new trans forward gear sheared off clean from too much torque...next upgrade is $$$, not cool 😧