Conversation Between Casper and Mike1977

hello I am looking to get back in the racing I have a scte the original.

I mainly like to run on dirt track I have a small 80x40 track at my house.. also looking to go to offroad dirt tracks some are big some are small. I'm not looking to change the whole car around every track just looking for a good base setup.

#1 on my diff fluids what is a good all around out door dirt set up?
#2 same question but for the shocks
#3 as of now I have a castle mamba max pro with the 3800 4 pole motor which seemed ok back when I was into it. I need a motor for another car which I could use the 3800 in that and get a new one for the scte truck what would you recommend as a inexpensive motor? is the sensered motors that much better?
basically I'm trying go over the whole truck once since it has been sitting and I know its needs attention.
thanks for any info you can give me.
Mike