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Has this ever happened to anyone before? How is this possible? lol
The info:
78 Ford f100
55k miles
stock 302 with edelbrock intake and 600 cfm carb
c4 trans
2wd
Rest of truck is bone stock
The problem..
The freaking OEM gear on the flex plate just fell off yesterday.. It ran completely fine and had no noises, vibrations, or problems.. then I went to start it up at lunch time and it made a metal grinding noise. So i think great, starter isn't extending and its grinding against the flex plate.. open it up and I just see the ring sitting there like this.. Its like all the welds around it just broke all at once..
Last edited by Messmoss; Oct 4, 2018 at 06:15 PM.
Reason: accuracy of title
They may have some welds on automatic flex plates, but I think you're right about manual flywheels having the ring gear pressed on. Never seen that before. My guess is that it's an aftermarket part.
I'm a newbie and learning here, but are the ring gears welded on normally? I thought they were heated up and pressed on or something like that.
They are heated up and pressed (they really just fall on) for a manual fly wheel. But automatics have flex plates and they are welded on. Like in the photo. This is the plate i am thinking about replacing the broken one with..
They may have some welds on automatic flex plates, but I think you're right about manual flywheels having the ring gear pressed on. Never seen that before. My guess is that it's an aftermarket part.
It could be man.. I inherited this truck from my dad when he passed away.. I was under the impression that it was bone stock and only changes that happened were basic tune up and maintenance. Ill find out when I pull it apart thought.. haha
That's not a oem flexplate, looking closer the torque converter is also not oem it's a rebuilt. My guess is during a trans rebuild it was swapped. Verify the torque converter is balanced when you have it apart. If you zoom in you can see the torque converter was lathe cut and re welded.
I have no answers for you but I do feel you pain, I had much the same thing happen to my 06 van last winter and this is what I found.
I posted the main issue above, the torque converter is usually what causes this. Especially seeing how poorly welded that reman torque converter is I would bet it's not balanced.
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and everyone has told me the replacement is heated and pressed on.
