it uses pendular suspension and has the same suspension setup which a guy on moc had with his 6X6 pendular suspension truck . like the original one this truck also has a mechanism to stop the wheels from touching the fenders.
About this creation
showing front pendular suspension
showing rear pendular suspension
how build it? the joint used is a peg
join it to a section of 2 wheels
and then join that section to na 2X1 brick with a hole in it which is joined to the chassis
and lo u have got a rolling suspension