Nice upgr8!
Frontal axis, steering system, bolts i like all! Shiluete seems robust and correct, you doing good job following all those reference pics.
I especially like the bolts and pieces that holding the springs. Its good that you dont loose your self modeling one piece with extreme complexity and you can keep going on(im not good at this).
By the way i see some bevels going on like everywhere, i personally prefer to add them last, sometimes saves me from trouble when i have to go back and edit things. Cant wait to see some parts on top of that with some really you know
defining hard edjes. You could even use some bevels with hard edges.So you actually want a mix of smooth and hard, worn etc. That will make your model look even more real and metalic, atm is a litl bit "smooth everywhere" exept things like springs.
Did you use normal constraint for bolts?

There was also an addon for such purposes. I remember there was a video and a guy was painting bolts on a plane, dont remeber name.