Muncie gear oil ?

Discussion in 'Transmission & Driveline Topics' started by BigBlock73, Jun 27, 2011.

  1. zachary8

    zachary8 Veteran Member

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    I know this is an old thread but I just thought I would throw in my 2 cents. Since completing a 15-year nut and bolt restoration on my Z I've put about 1100 miles on it. Every drive train component on the car was rebuilt. Generally, the car drives very well but the shifts are "notchy". I wouldn't even dream of power shifting it due to a total lack of smoothness shifting the Muncie. At first, I thought maybe the synchros weren't right but after doing a little reading (including this thread) I just ordered 2 quarts of ACDelco Manual Trans Fluid 10-4070 75W-90 GL-4. I will post again after I change the fluid and let you guys know what change there is (if any).
     
  2. FlaJunkie

    FlaJunkie Veteran Member Lifetime Gold Member

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    Not being funny, but did you rebuild the Muncie? Did you put heavier synchronizing hubs in it? Makes a world of difference. Ask Jody.
     
  3. 80sz

    80sz Veteran Member

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    image.jpg I was told to use this when I got my munci that has just ben rebuilt. Quart and a half.
     
  4. Dave Nelson

    Dave Nelson Veteran Member

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    If the neutral gate is not set properly the shifts can feel "notchy", try resetting the neutral gate again.
     
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  5. zachary8

    zachary8 Veteran Member

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    My answer is I don't know. The trans was rebuilt by a reputable local trans shop about 10 years ago and then put on a shelf for 10 years until it was installed.
     
  6. FlaJunkie

    FlaJunkie Veteran Member Lifetime Gold Member

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    Talk to Jody about it...
     
  7. Misfire

    Misfire Member

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    All I know is if gonna hoss em, gonna pop em,, Ive popped a few pushing a blown 427,,, any kind of driveline slack is more of an enemy than wrong oil,,, I have had really good luck past 5 years running lucas tracktor trailer transmission oil,, The thickest they make, If I remember its a 140/90? When you have enuff power, you don't have to do all that fancy speed shifting and such.
     
  8. zachary8

    zachary8 Veteran Member

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    My car has a 383 stroker that's probably got about 400-425 horsepower. It's more motor than I ever had in any Camaro I've ever owned before. None of my other Muncies were ever rebuilt and I would beat on my cars relentlessly (They were my daily drivers) when I was a kid. Lost a couple of clutches but never blew a transmission. This is only the second year since I finished the restoration and I drive my Z as much as I can, which, unfortunately, only about 5000 miles a year. If the trans blows it blows - It is what it is now and I'll have to take my chances. I'll keep everybody informed about the gear fluid change and how it shifts.
     

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