My auto in the 89 minivan is hurting. Starts off in second or third unless you stuff in in park for a moment and back to drive. So I found a 1991 sundance 2.5turbo local for $500 running and 55,000 miles on rebuilt tranny. Is it the a413 like my van? Ifso what else is different (gear ratios, torque conv?) Thanks for your help tryin to get hre going again.