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Transmission fluid Compatability

Discussion in 'Truck & Equipment Repair' started by 2dogs2, Dec 27, 2007.

  1. 2dogs2

    2dogs2 Member
    Messages: 81

    I am looking at changing the fluid in my 89 blazer, it calls for dexron II .. Will dexron VI work?

    If so, can I siphon out as much of the old fluid, fill it with the VI without any problems?
  2. doh

    doh Senior Member
    Messages: 253

    Yes you can use higher number Dextrons, in old transmissions. No problems
  3. B&B

    B&B PlowSite Fanatic
    Messages: 12,777

    Yep Dexron VI is just fine... in fact GM recommends the VI for ALL current and previous GM transmissions EXCEPT the '05 an older Allisons... They still need Dexron III...
  4. MickiRig1

    MickiRig1 PlowSite Veteran
    Messages: 3,617

    You really should drop the pan and change the filter or clean the screen if it has one. It will gets a lot of the crude out so it's not circulating around with the new fluid.Put a new pan gasket on too.