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1980 - 1986 Bullnose F100, F150 & Larger F-Series Trucks Discuss the Early Eighties Bullnose Ford Truck

86 flywheel help

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Old Feb 3, 2009 | 08:54 PM
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86 flywheel help

I need your help!!! I have an 86 F150, 4X4, short box, that was originally a 302 efi and I swapped to a stroked 351 windsor, built a stronger a.o.d. tranny complete with extra clutches, herdened shaft, and I believe a c6 torque converter. Recentlly the brute Windsor broke the bellhousing on the tranny and I had to have it fixed. I noticed the flywheel didn't look too hot so I decided to replace it. Now I can't find 1 like what is in it. I've ordered a couple from local part stores as well 1 from a tranny shop in town. all of the flywheels have differences like being dished wrong or torque converter bolt holes too small. The Pioneer that I picked up from Orielly today binds up the torque converter and I'm afraid it will cause further problems if I use it. The guys at the part store cannot match it by sight. According to the local blue oval wizard here in town a small block flywheel is a small block flywheel on a Ford. Can any of you guys point me in the right direction with a part#, brand or store, website?
 
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Old Feb 3, 2009 | 10:01 PM
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i thought the 302 and 351 flexplates were changable too. is it possible you had a 300 flexplate? they are balanced differently, and can cause vibration if misused.
 
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Old Feb 3, 2009 | 10:08 PM
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Where did your first flywheel come from? I know that on the 302's, the flywheel changed around 1981. Not sure on the 351w, but if your engine is really from, say, a 70's truck, and you are telling them it's for a 1986 Ford, that could be the problem. That is, IF the 351w changed weights on flywheels, too.
 
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Old Feb 3, 2009 | 10:40 PM
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351w balance stayed the same. The 302 changed like was said around 81ish. If you had some sort of customized AOD with a C6 convertor, they may have had a custom built torque convertor. You had better ask who built the tranny.
 
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Old Feb 3, 2009 | 11:00 PM
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You said it binds up the converter? Did you seat the converter all the way? Most often that's what happens when you tighten up the converter nuts and bellhousing bolts and the flywheel and converter won't turn.

Been there...done that...
 
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Old Feb 4, 2009 | 01:05 PM
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Originally Posted by Franklin2
351w balance stayed the same. The 302 changed like was said around 81ish. If you had some sort of customized AOD with a C6 convertor, they may have had a custom built torque convertor. You had better ask who built the tranny.
I should have said custom built converter and flexplate. They may have simply re-drilled the AOD flexplate to fit the c6 converter.
 
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Old Feb 4, 2009 | 06:03 PM
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First of all thanks all of the immediate replies. As you can see I'm not really transmission literate. I did have some luck today and was wanting some more info. I went ahead and ordered the 1 flywheel that O'reilly didn't have in stock and it turned out to be the 1 I needed. The sales rep there told me it was a flywheel for an 81 only model f150 wih a 302 and a c6. Now I also talked to the guy who built my a.o.d. and he said that a c6 converter would not fit in an a.o.d. and that he had just put an oversized stall converter in the a.o.d. He also said that a small block Ford flywheel was a smallblock Ford flywheel. I am finding out though that this is definitely not the case. I am very much interested in any more info on the subject you guys can offer.
 
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Old Feb 4, 2009 | 08:34 PM
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I don't know what would have been different about the 81 302 with the c6. That's what my 80 f150 had in it, a 302 with a 4x4 c6.
 
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Old Feb 5, 2009 | 01:11 AM
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Originally Posted by Franklin2
I don't know what would have been different about the 81 302 with the c6. That's what my 80 f150 had in it, a 302 with a 4x4 c6.

This is what I came up with, remember this is stock without modification.

1980 302 with C-6: D1ZZ-6375-A - 28 oz, counterweight.

1981 302 with C-6: E1TZ-6375-C - 50 oz counterweight.

1981 302 with AOD: E2AZ-6375-A - 50 oz counterweight

1981 351 with C-6: E0AZ-6375-A - 28 oz counterweight.
 
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Old Feb 5, 2009 | 09:31 AM
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Originally Posted by 81-F-150-Explorer
This is what I came up with, remember this is stock without modification.

1980 302 with C-6: D1ZZ-6375-A - 28 oz, counterweight.

1981 302 with C-6: E1TZ-6375-C - 50 oz counterweight.

1981 302 with AOD: E2AZ-6375-A - 50 oz counterweight

1981 351 with C-6: E0AZ-6375-A - 28 oz counterweight.
So there is no AOD flexplate in 1981 with a 28oz counterweight, and he is putting that behind a 351w? That doesn't sound good. I would not think that 50oz AOD flexplate is going to work behind a 351w. Did they ever put a AOD behind a 351w?
 
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Old Feb 5, 2009 | 12:59 PM
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Originally Posted by Franklin2
So there is no AOD flexplate in 1981 with a 28oz counterweight, and he is putting that behind a 351w? That doesn't sound good. I would not think that 50oz AOD flexplate is going to work behind a 351w. Did they ever put a AOD behind a 351w?
No AOD's behind 351's between 1981 and 1986 at anyrate.

And the 1981 is the first year of the AOD, and these were bolted up to 302's specificly.

Sounds like he needs to swap trannies out for a C6 otherwise the same damage he just got repaired may happen again.
 
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Old Feb 7, 2009 | 05:41 PM
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Really!? I was not aware that the 351w was never coupled to an aod tranny. I know that it was coupled to the e4od later for sure. At any rate I've spent about all the money that can be spent on this tranny to try and make it hold (or so I'm told). The reason the flywheel got chewed up by the starter was the windsor actually broke the top 2 bolts and a large chunk of metal out of the belhousing on the aod causing it to sag a little without me knowing. I've about decided that this series of trucks are too weak for what I intended to start with. I've got an old 77 with a big block that's been beaten and thrashed at least twice as hard and it doesn't complain, neither does the 99 Lightenin nor the 96 cobra.
 
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Old Feb 7, 2009 | 05:50 PM
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I am thinking the factory never put the AOD behind the 351w for a reason. And you are putting it behind one that is warmed up a little bit. If your priorities are not fuel mileage, you pretty much cannot break a c6, and it's cheap to get rebuilt. That's the tranny they used in the 70's, besides the c4, and thus the good record those trucks have for trannies.
 
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Old Feb 7, 2009 | 06:34 PM
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First of all I want to say how freakin awesom this website/forum really is. I feel like I'm home if you know what I mean. No fuel mileage isn't critical although I do drive about 70 miles 1 way to deer hunt. Basically I was just really, really, really tired of being picked on by those D@*ned Z71s or any other 5.7 litre be it a hemi or toyota or whatever. So I bred a true blue oval dragon and turned it loose!!!! I watched that video of the 4x4 shootout with the 302 vs the hemi and that guy could be a family member of mine! Our trucks are even the same color, though I believe the windsor I have would be a little much for him if it all stayed together. My ol truck has a few 2wd hotroded trucks, a couple of camaros and a couple of vettes and as bad as I hate to say it a MUSTANG or 2 under it's belt.
 
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