losi 22 on foam tyres,help please

[xray011]

Got a new 22,i set it up to the book mid motor but it was spinning round on corners,so i put it rear motor to put weight on rear but it still spins.
Tried thicker oil but still undriverable.
On carpet no jumps.
Any ideas please,or setups for foams.
Being three weeks now,pulling my hair out!