i purchsed a 2001 s10 4x4 blazer with a 4.3ltr engine with 98,000 miles i now notice a "shutter" when the truck is warm (in closed loop) mostly when turned left or right doesnt matter if in drive or reverse. sometimes feel the shutter in drive on accleration. it only does this after the truck is warmed up, when its cold it runs great. the truck has had a recent tune-up ,the engine runs fine no miss, no smoke, on the hiway runs good,only engine code is apo410 an A.I.R pump not working. any help would be greatly appriciated!!!!

 

 

thanx for the reply yes it does all this shutteringmostly, when the steering wheel is turned does not matter if going foward or backwards power steering fluid dark i added very little to bring it up to correct level. so what are you thinking? any help would be great!

 

i would try a fluid change (flush) first and go from there.

 

um, I would fix the air pump first.

tranny performance is based on engine performance, tehy work as a team.