1999 GMC Sonoma Not shifting

1999 GMC SONOMA
150,000 MILES • 4 CYL • 2WD • AUTOMATIC
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MRPASO1963
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  • 1 POST
I changed the trans. oil and the 2 lines that go from the trans. to the radiator, also changed the radiator, now it doesn't change gears when I drive it. What can it be?
Oct 6, 2010 at 1:05 PM
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HMAC300
  • ✓ASE Certified Mechanic
  • 48,601 POSTS
  • ASE Certified Mechanic
trans fluid changes are NOT reccomennded in vehicles with mileage this high. It tends to eat the glue off the clutches in the transmission. But make sure your fluid level is up as it may not be since driving. if it's low fill it and see if it works for now
Oct 12, 2010 at 2:47 PM
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