Drain and Refill or Flush 8L90?

MahfiazB to Mechanic Advice@gearhead.townEnglish · 10 months ago

I’m looking to get the notorious 8L90 transmission fluid swapped out with Mobil 1 LV ATF.

I went to the Chev dealer and they said they’d flush it. My mechanic said they’d change the transmission but not the converter, and also said a full flush of the system isn’t recommended as it has close to 100,000 KM on it.

Which option is better, does it matter?

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