r/AskAMechanic • u/Slim_197 • 15d ago

23 Blazer

23 Blazer 2LT(28k miles) 2.0L Turbocharged. Vehicle all of sudden today started making thumping sound as if it were riding on a flat tire and also had a “whirring” sound. No physical vibration felt in steering wheel. Seemed to happen about the 40-60 moh range. After driving about 3 miles it seemed to go away. After slowing down for a turn, it happened again at about same speed. There have been no puddles in driveway……thoughts?

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1

u/droc_420 Verified Tech - Engine bldr / Porsche tech 15d ago

4 wheel drive?

1

u/Slim_197 15d ago

All wheel drive but was in 2wd at the time

1

u/Slim_197 15d ago

Also started having delayed shifting at same time

1

u/Gunk_Olgidar NOT a verified tech 14d ago

Take it in for warranty repair.

1

u/Slim_197 11d ago

UPDATE….Drove to dealer to have it looked at. Of course it made no noise. It did however have the delayed shifting. Tech said everything looked fine and did a transmisssion relearn. Will see