Join Shelby Forums Today

66 GT350, changing tranny fluid...

Discussion in '1965-1970 Shelby Mustang GT350 & GT500' started by Edward66GT350, Apr 30, 2006.

  1. Apr 30, 2006 #1
    Edward66GT350

    Edward66GT350 Well-Known Member

    Age:
    67
    Posts:
    126
    Likes Received:
    0
    Joined:
    Dec 26, 2004
    what is recommended oil. Was told to use 15-40 or 20-50 Castrol GTX motor oil.
    Any thoughts?
    TIA
    Ed
     
    Edward66GT350, Apr 30, 2006
    Edward66GT350, Apr 30, 2006
    #1
  2. Apr 30, 2006 #2
    daltondavid

    daltondavid Well-Known Member

    Age:
    62
    Posts:
    925
    Likes Received:
    0
    Joined:
    Dec 9, 2004
    Location:
    Garnet Valley, Pennsylvania
    Re: 66 GT350, changing tranny fluid.............

    I like 20/50
     
    daltondavid, Apr 30, 2006
    daltondavid, Apr 30, 2006
    #2
  3. May 1, 2006 #3
    gjz30075

    gjz30075 Well-Known Member

    Age:
    75
    Posts:
    87
    Likes Received:
    1
    Joined:
    Jan 6, 2006
    Location:
    Roswell, Ga
    Re: 66 GT350, changing tranny fluid.............

    Edward... your post title says tranny fluid. You want 80/90 weight hypoid oil for the tranny. 20/50 is for the motor.
     
    gjz30075, May 1, 2006
    gjz30075, May 1, 2006
    #3
  4. May 1, 2006 #4
    Edward66GT350

    Edward66GT350 Well-Known Member

    Age:
    67
    Posts:
    126
    Likes Received:
    0
    Joined:
    Dec 26, 2004
    Re: 66 GT350, changing tranny fluid.............

    A Ford mechanic that use to rebuild these trans is recommending motor oil for smoother shifting. I too would have thought to use 80/90 gear oil.
    Thanks,
    Ed
     
    Edward66GT350, May 1, 2006
    Edward66GT350, May 1, 2006
    #4
  5. May 5, 2006 #5
    Edward66GT350

    Edward66GT350 Well-Known Member

    Age:
    67
    Posts:
    126
    Likes Received:
    0
    Joined:
    Dec 26, 2004
    Re: 66 GT350, changing tranny fluid.............

    Is 80/90 hypoid the same as 80/90 axel lube?
     
    Edward66GT350, May 5, 2006
    Edward66GT350, May 5, 2006
    #5
  6. May 5, 2006 #6
    daltondavid

    daltondavid Well-Known Member

    Age:
    62
    Posts:
    925
    Likes Received:
    0
    Joined:
    Dec 9, 2004
    Location:
    Garnet Valley, Pennsylvania
    Re: 66 GT350, changing tranny fluid.............

    wow did I miss that one!! try synthetic 85/90W in the Tranny.
     
    daltondavid, May 5, 2006
    daltondavid, May 5, 2006
    #6

Share This Page