I need a C4. Im in Mckinney, Texas

Discussion in 'Transmissions' started by shaneb, May 27, 2011.

  1. scooper77515

    scooper77515 No current projects.

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    Also, are you sure you have put your converter on and secured it all three clicks?

    I am not sure what you are saying is 1" too long, but if it is just a simple fix, that is better than driving to Houston and spending more money.

    Or is the bellhousing different?
     
  2. baddad457

    baddad457 Member

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    That's a C-5, not a C-4. The difference is the deeper bell for the lockup converter feature. And just FYI, the FMX wasn't something Ford "Rushed out", it was around for more than a decade plus another decade for it's predecessor which dated back to the 1950's. The AOD was also based on the FMX, so it's not something you can rag on as a bad transmission, it's far tougher in stock form than a C-4. Seems to here that you're runniung around blindly trying to do something too quickly. Slow down, take a breather and think about what you're doing before you do it. You'll save a bunch of money and effort.
     
    Last edited: May 27, 2011
  3. shaneb

    shaneb Member

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    I never ragged on the transmission or said it was a bad transmission. Just misinformed by someone on a forum.


     
    Last edited: May 27, 2011
  4. shaneb

    shaneb Member

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    On the new transmission I got. The bellhousing is one inch smaller from top to bottom. All the bolts line up fine. My flywheel won't fit inside it.


     
    Last edited: May 27, 2011
  5. scooper77515

    scooper77515 No current projects.

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    Mine is 15.5" from inside bottom to inside top right up the middle.

    One thing to consider...we use a smaller flywheel on our 5.0/C4 combos.

    You will need 157 teeth rather than 164 but still with the 50 oz imbalance. Could be your issue.

    New smaller flywheel (actually "flexplate") are fairly cheap on ebay. $80 on Jegs, I paid $36 on ebay.
     
  6. baddad457

    baddad457 Member

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    That's a good thing then. Smaller is better.The FMX has a 164 tooth bell, Ditto for C-5's and the big bell C-4 (but different bells for the two) Then you have the 157 tooth C-4, which is the most desireable. Then there was a 147 tooth C-4 bell which was a Mustang II only application.
     
  7. shaneb

    shaneb Member

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    As mentioned I don't know much about transmissions, but if the teeth on the flywheel is smaller how would the starter work?



     
  8. scooper77515

    scooper77515 No current projects.

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    Just mark one tooth, and count around to see how many teeth are on there.

    If you have the correct number, it will all go together, starter will work just fine.
     
  9. shaneb

    shaneb Member

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    Just want to get this straight on what I need to do. Ok so I have a 164 tooth count on the teeth. Please correct me if im worng but I need a 157 tooth count flexplate or flywheel? Its a 79 302 5.0. Ive read that in 79 or after they started using 50oz instead of 28oz on the 5.0 engines. How can I be sure of what I got? I dont want to have everything rebalanced as it was just rebuilt. Do I have a 50oz or 28oz? I read something about the harmonic balencer that the numbers could tell you what Ounce it is. Not sure if thats true I would like to double check everything before I make another purchase.


     
  10. scooper77515

    scooper77515 No current projects.

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    If the balance is 50 oz,, as 5.0s are, you need a 157 tooth flexwheel to mate the 5.0 to a C4.

    Basically, the 5.0s have 50 oz imbalance, and the 302s have 28oz. Has to do with the crank more than anything. Check your balancer, and make sure the flexplate matches.

    Here is the part...

    http://www.jegs.com/i/Hays/490/12-040/10002/-1
     
  11. baddad457

    baddad457 Member

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    79 motor will be a 28oz/in. definately you'll need the correct tooth count wheel to match the bell housing
     
  12. scooper77515

    scooper77515 No current projects.

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    is it a 5.0 or 302. Same thing, sorta, but you gotta treat them a different engines.5.0 is 50 oz imbalance, 302 is 28 oz.
     
  13. shaneb

    shaneb Member

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    I was told that after 79 5.0s were used with 28oz and after that they went to 50oz. The numbers on my harmonic balencer are D20E-6316-A2A- S. I just looked it up and everything came up as 28oz. The place I got my engine rebuilt at said it was definitely a 302 5.0 but couldnt tell me exactly what car or truck it came out of. When I looked up the casting numbers it showed it belonged to a 79 LTD and those were all 302 v8's 5.0 I think in 81 is when they actually changed it over to 5.0 as 50oz

     
    Last edited: May 28, 2011
  14. scooper77515

    scooper77515 No current projects.

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    Gotta figure out if 28 or 50 oz imbalance first, before you do anything else, or destroy the engine.
     
  15. rthomas771

    rthomas771 Member

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    1985 is when they went to 50 oz
     

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