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Flywheel I.D.

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Old May 4, 2011 | 05:25 AM
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Flywheel I.D.

So guys, you all know that my flywheel has a couple broken teeth, pissed me off when i found out. I need to know what kind of flywheel the 84 has....it keeps giving me two options....so i have not a clue. Its a T-18 4 speed as you guys know from my signature....
 
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Old May 4, 2011 | 05:55 AM
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Doesn't matter what flywheel it has, since there is no need to replace it. Since the teeth are chipped, only the flywheel's ring gear needs to be replaced.

E5TZ-6384-B .. M/T & A/T Flywheel Ring Gear / 1983/97 6.9L/7.3L / Available from Ford.

MSRP: $94.52 // FTE sponsor PARTSGUYED.COM price: $68.05.

The old ring gear has to be 'sweated' off the flywheel, the new ring gear is then 'sweated' on. Any autoparts store with a machine shop can do this.
 
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Old May 4, 2011 | 07:19 AM
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here is the story, so i make sure i have the right thing. If i want to start it after its been sitting...my friend has to push the damn thing a few feet and get it rolling, then i have to let the clutch out to turn the crankshaft/flywheel a little bit. Then i can use the starter to fire it up. So is it my ring gear?
 
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Old May 4, 2011 | 10:36 AM
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Could well be but only one way to know for sure. Pull the starter then slowly rotate the engine crankshaft while looking at the ring gear teeth all of the way round. You will soon see any missing teeth or confirm that the ring gear is good.
 
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Old May 4, 2011 | 05:23 PM
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Originally Posted by Aune163rd
here is the story, so i make sure i have the right thing. If i want to start it after its been sitting...my friend has to push the damn thing a few feet and get it rolling, then i have to let the clutch out to turn the crankshaft/flywheel a little bit. Then i can use the starter to fire it up. So is it my ring gear?
The starter's drive is located on the ring gear where the teeth are chipped, so it's necessary to move the flywheel a bit so the drive will engage the ring gear where teeth are present.

This same scenario is nothing new, has affected a gazillion different vehicles for 99 years, ever since vehicles have had flywheel's with ring gears on them and a starter (first starter: 1912 Cadillac).

The teeth chip, the starter drive lands on the ring gears chipped teeth, so the starter drive spins freely and the starter whines like a stuck pig.

Move the flywheel to a place where there are no chipped teeth, the vehicle starts.
 
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Old May 5, 2011 | 05:19 AM
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I dont get it whining like a stuck pig...I get a god aweful grinding noise like its grinding metal teeth on teeth....is that still the same situation regardless?
 
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Old May 5, 2011 | 05:20 AM
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Can you explain the 'sweating' off and on to please? I think I know what your talking bout but I want to be sure.
 
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Old May 5, 2011 | 05:49 AM
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Since the diameter of the ring gear is smaller than the flywheel, it has to be heated up to allow it to expand so it can be R&R'd.

Most times when the starter drive lands on a spot where teeth are chipped, it spins freely, the starter then whines like a stuck pig.

On your truck, there is enough of the teeth remaining that the drive is grinding against them, but there's not enough of the teeth remaining for the drive to engage the ring gear.
 
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Old May 5, 2011 | 09:52 AM
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My trans guy told me, you lay the flywheel on the bench and heat the ring gear, when it expands it should fall off. Put the bare flywheel in the freezer, heat the ring gear a little and then the ring gear should slide over the flywheel and bond itself when it cools.
 
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Old May 5, 2011 | 04:04 PM
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So a torch is nessasary, and a freezer big enough to hold a flywheel, sounds like a PITA. Would I be better off just buying a new one and throwing it on there?
 
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Old May 5, 2011 | 06:10 PM
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Don't buy one. Take a torch and heat the ring gear till it falls off. The flywheels are probably to heavy for a regular deep freeze to help you. Some may do it but you don't have too. Dry ice would do it but you don't need that either. The trick is getting your ring gear hot uniformly without getting it to hot. The way I do it is to make a fire out of some feed sacks and kindling. Throw the gear on the fire then seat it on the flywheel. You will know when it is hot enough because it will go on without much trouble. You can use a house oven also. Get it hot enough to get a nice blueish color. Get it to hot you mess it up. You can actually harden them so they will get brittle. It's not a big deal. If you think you have it hot enough them try it. If it doesn't go on easy them warm it up some more....I make a fire because I have all the stuff handy. If I tried the oven then I would get hurt. It's like washing engine parts in the bathtub. Can be dangerous if she finds out.
 
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Old May 5, 2011 | 06:36 PM
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LOL! Fortunately....i have no other half to yell at me bout that kind of stuff, i would get hurt with a torch(burnt more than anything) and the oven will burn the house down...fire....well....44 acres of ash doesnt seem like an ideal situation.
 
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Old May 5, 2011 | 09:00 PM
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I used a gas grill to heat the last ring gear that I installed. It worked great.
 
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Old May 5, 2011 | 10:09 PM
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When putting kingpins in my buddys pete we cooled the pin by cracking the valve of an upside down 20lb lp tank and let it at the pin and dropped the pin in. But LP is getting a little spendy now.
 
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Old May 6, 2011 | 03:48 AM
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Originally Posted by NumberDummy
The old ring gear has to be 'sweated' off the flywheel, the new ring gear is then 'sweated' on.

Any autoparts store with a machine shop can do this.
If you don't wanna go thru this hassle yourself...
 
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