Mahfiaz@alien.topB to Mechanic Advice@gearhead.townEnglish · 10 months ago

Drain and Refill or Flush 8L90?

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Drain and Refill or Flush 8L90?

Mahfiaz@alien.topB to Mechanic Advice@gearhead.townEnglish · 10 months ago

3

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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jkjeeper06@alien.topB
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10 months ago
There is no way to drain the fluid from the TC without removing it so a drain and fill leaves fuid in the TC. This is acceptable per the service manual. You could also disconnect the oil cooler line to get more out

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