8 80niner New member Joined Feb 20, 2013 Messages 1 Reaction score 0 Points 0 Feb 22, 2013 #1 I have a 89gmc 1500 with a 700r trany.it well not upshift in to 3rd or4 i get up to 40mph then its like its go's into n.i have change the filter in trany.change the 3rd and 4th shift soiloid and still have the same problem.
I have a 89gmc 1500 with a 700r trany.it well not upshift in to 3rd or4 i get up to 40mph then its like its go's into n.i have change the filter in trany.change the 3rd and 4th shift soiloid and still have the same problem.
