1979 Camaro rear differential

Discussion in 'Transmission & Driveline Topics' started by miastewie, Jun 19, 2019.

  1. miastewie

    miastewie New Member

    Messages:
    24
    Likes Received:
    1
    Joined:
    Feb 28, 2013
    Location:
    RIO RANCHO, NM
    Hello, I have a 1979 camaro with the stock 305 engine. I'm trying to find out what rear differential gear oil I need for this car and also if anybody knows if it has limited slip or not.
     
  2. Gary S

    Gary S Administrator Lifetime Gold Member

    Messages:
    23,215
    Likes Received:
    1,149
    Joined:
    Apr 14, 1999
    Location:
    Bismarck, North Dakota
    The car could have been ordered either with or without positraction so you need to look it over and find out. The easiest way to find out is to remove the cover and drain the differential which you need to do anyway if you are changing the gear oil.
    We can't tell if we can't see it.
     
  3. Twisted_Metal

    Twisted_Metal Administrator Staff Member Lifetime Gold Member

    Messages:
    27,856
    Likes Received:
    1,386
    Joined:
    Feb 26, 2004
    Location:
    Bloomington, MN
    If it’s a positraction (limited slip) rear you will also need the limited slip additive along with the gear lube.

    Pull the cover and post pics to be sure you use the right stuff.

    You can usually tell if it’s a posi rear by raising both rear wheels off the ground and spinning one wheel by hand. (Gear selector in neutral.)

    If they both turn the same direction, it’s a posi rear.
     
  4. miastewie

    miastewie New Member

    Messages:
    24
    Likes Received:
    1
    Joined:
    Feb 28, 2013
    Location:
    RIO RANCHO, NM
    Thanks you guys for your fast replies, I'll have a picture up tomorrow and I'll also lift the back up and turn the wheels and let you know.
     
  5. RS1979

    RS1979 Veteran Member Lifetime Gold Member

    Messages:
    3,932
    Likes Received:
    882
    Joined:
    Jun 18, 2013
    Location:
    Memphis, TN
    Be sure and chock the front wheels. If you don't, the car can roll with the jack underneath it. Don't ask me how I know. LOL
     
  6. miastewie

    miastewie New Member

    Messages:
    24
    Likes Received:
    1
    Joined:
    Feb 28, 2013
    Location:
    RIO RANCHO, NM
    He is a picture of the differential. 20190620_123803.jpg
     
  7. Gary S

    Gary S Administrator Lifetime Gold Member

    Messages:
    23,215
    Likes Received:
    1,149
    Joined:
    Apr 14, 1999
    Location:
    Bismarck, North Dakota
    Not a posi. Now, if you count the teeth on the ring and on the pinion, you can figure out your ratio. Or, simply turn the ring gear and look along the edge. If it is a factory ring and pinion, the numbers will be stamped on the ring gear.
     
  8. miastewie

    miastewie New Member

    Messages:
    24
    Likes Received:
    1
    Joined:
    Feb 28, 2013
    Location:
    RIO RANCHO, NM
    I'm sorry for sounding like such an amateur, which one is the ring and which one is the pinion. And how do I turn the ring?
     
  9. Chevyforever

    Chevyforever Veteran Member

    Messages:
    817
    Likes Received:
    147
    Joined:
    Jan 4, 2011
    Location:
    Ontario, Canada
    big round gear is the ring gear, turn the driveshaft
     
  10. Bandit723

    Bandit723 Veteran Member

    Messages:
    3,279
    Likes Received:
    486
    Joined:
    Oct 1, 2016
    Location:
    Waupaca WI
    looked at the picture kinda looks like the pinion gear is making contact with the carrier...
     

Share This Page