50oz. flywheel ?

[k13evin]

Can you pick up a 50oz flywheel at the parts store to fit a C4?
I'm not really sure what car or truck to get it from. For a 302

 

[JAFO]

This link helped me when I was figuring out my flywheel...

http://www.ford-trucks.com/forums/459698-302-flywheel-confusion.html

 

[NYLES]

I used one off a 83 crown vic 302 and aod

 

[k13evin]

I used one off a 83 crown vic 302 and aod

Sweet and that one worked good for you?

 

[01JLH]

You specifically say for a 302. Please make sure you need a 50 oz imbalance. 302's up to a specific year required 28 oz imbalance. I believe the later motors designated 5.0 (actually 302 cubic inches) were 50 oz.

 

[Broncobowsher]

Depends on what torque convertor you have as well. If it is the small 10.5" bolt circle convertor, a late model flexplate never existed for that. You can't even get the 164 tooth version for the old engine balance either. Obsolete.

If you have the larger 11.4" bolt circle convertor then a late model flexplate for an AOD works fine. '88 Mustang 5.0 or a '00 Explorer with the 5.0 are all good.

What you do not want is a flexplate for a C6 or E4OD application. They look correct, bolt to the engine, correct number of teeth, correct bolt circle. Problem is offset is wrong and will put a thrust load on the transmission and crankshaft.

All the above assumes you actually have a Bronco C4 (or truck/large car) that uses the 164 tooth flexplate. If you have a typical car transmission that usually has the smaller 157 tooth flexplate. You will only experience that if someone has done a conversion kit on a C4 to fit it into a Bronco.

 

[k13evin]

81 block mustang. Should be 50oz right. It's a C4 that came out of a bronco. I used a 28oz but there is alot of vibration in it. That's why I'm guessing I should have used the 50oz

 

[bigcountry]

81 block mustang. Should be 50oz right. It's a C4 that came out of a bronco. I used a 28oz but there is alot of vibration in it. That's why I'm guessing I should have used the 50oz

Did you reuse the harmonic balancer? Balancers can slip and cause vibrations also. 81-82 was the transition year from 28 to 50 so it is hard to tell. if you determine it is a 50oz balance you will have to change both the harmonic balancer and the flywheel.

 

[k13evin]

Yeah the harmonic balancer was a 50oz. Just checked the stamping on it. I guess it slipped my mind when I changed all that stuff. So can I get a 50oz flywheel from the part store to work. Or will I have to order online

 

[Broncobowsher]

Sounds like you confirmed the wrong flexplate. The only question is what size is the bolt circle on the torque convertor. You will need the new flex plate no matter what, but don't know if you need a new convertor to match or not.

 

[k13evin]

It's the torque converter that came with the C4. It fit the older 28oz plate.

 

[Broncobowsher]

The Bronco came with two different bolt circle torque convertors. Do you remember which one you have? Typically (and Broncos have proven to prove us wrong whenever "typical" is expected) the '73 and '77 are the big bolt circle and the '74-'76 are the small bolt circle.

In short, we don't know what you are working with.

 

[Tiko433]

I did the reverse....last year . I pulled my 3 speed, swapped in a C4 from 50oz motor. I could tell something was not right with my first test run . I installed a 28 oz flex plate , smoothed it right out. I held on to the 50oz I removed, one less thing to check off this list for my Explorer swap

 

[k13evin]

The block was rebuilt it came off a 82 mustang. So that should be a 50oz flywheel right

 

[KBUCK1]

If thats what the stamp says then id say thats what it is

 

[Tiko433]

I was able to change mine in a few hours .... I didn't drop the trans , I just backed it up far enough to get the job done . If you verified you have a 50oz balancer change the flex plate . But I have a question..., could you change the harmonic Balancer ? To match your current FlexPlate ? I'm don't know if that can be done .

 

[k13evin]

what part number did you use or what year make and model did you get if from?
i did ive got 24oz up front and back. but the thing is shaking a bit much

 

[Tiko433]

You don't want my part number, I bought a 28oz If your sure you have a 50 oz Harmonic Balancer you need a 50 oz Flex plate . Like it was mentioned there are two size Torque Converter . Either pull yours then match it for what you need or buy both and return the one you don't need .

 

[tirewater]

Perhaps it's best to drop the oil pan and check the casting marks on the crankshaft to know if you have an externally balanced 50oz or 28oz.

I'm not getting any warm fuzzy's that we know the source of the problem yet.

 

[76 bronco J]

>>> little more clarification about what Broncobowsher was saying .... except for the oddball setup, it's always 157 tooth flexplate with a 10 1/2" bolt pattern torque converter for use in the small bellhousings & 164 tooth flexplate with a 11 7/16" bolt pattern converter for use in the big/deeper bellhousings.... the oddball setup that came on some ford vehicles & some broncos (including mine) had the 164 tooth flexplate with a 10 1/2" converter bolt pattern.... the 10 1/2" bolt pattern converter used on the oddball setup had welded on pilot cup to make it work in the deeper big bellhousing..... below is a pic of my old oddball converter....I bought the rebuilt Dacco F48 -11 7/16" pattern converter for $35 plus a $20 core back in '04....the place I purchased it from mainly deals with shops in the area & wouldn't take the oddball converter as a core..... needed the converter when I went to the later 50oz. imbalance engine..... as mentioned a 164 tooth flexplate - 50oz. imbalance with a 10 1/2" bolt pattern for the torque converter doesn't exist......