just let me know when you get started...eddie

 

Hi All,

I'm doing the same thing in reverse. Changing my C4 to an AOD. 1975 302 Engine, currently bolted up to a C4.

I get the number of teeth on the flexplate needs to match the starter and the bell housing size will be a factor, but the 50oz. Vs 27oz. weight I have a question about.

It appears that the flexplate weight needs to be matched to engine type due to balancing and teeth number to starter and bellhousing to engine, I assume since my engine is a bit older it has a 27oz weight?

--- so assuming my AOD has the proper 302 bellhousing, should I be able to use my current flexplate and starter with the AOD?? I do know the AOD torque converter is different.

Thanks, Joe

 

I think you are correct but I will wait for the experts to corroborate!

 

If your 302 is older than 1981, then yes, you'll need a 28 oz (not 27 oz) imbalance flexplate - but that's not the only consideration. There are two different diameters or tooth counts. The AOD was only used with the larger 164-tooth flexplate. The C4 was used with both the 164-tooth and also a smaller 157-tooth plate depending on year and bellhousing type. Whether or not you can reuse your existing plate will depend on which you have. The easiest way to tell is simply count the teeth. If it turns out that you do have the incompatible 157-tooth wheel, it's not a big deal. The correct 28 oz. 164-tooth wheel is easy to get and cheap. I just bought one for my buddy's Bronco Fit great, balanced good, and shipped fast. Get it here:

Flywheel, Ford C5 / AOD, 289, 302, 351 engines Makco Transmission Parts

In any case, your C4 starter will work just fine on the AOD. All Ford automatic starters are interchangeable.

 

Thanks for the information BlueOvalRage -I'm closing in on my engine/transmission mounting and I knew there was a consideration regarding the AOD/C4 differences, but not the specifics. You provided those specifics!

Thanks again. Joe

 

I would PM Numbers Dummy . He is all knowing .

 

It's finally warm enough to get out to my garage. Here is what I have.

The 85 302 has a 164 tooth flexplate on it. The C4 has a 160 tooth flexplate and a big weight welded to the inside so I don't don't what the balance factor is. We've been mentioning 157 teeth all along and now I find out this is a 160 tooth so I don't know where I am on this. I know that the C4 converter will not bolt to the 164 tooth flexplate and probably the balance is not right for the 302 to use the 160 tooth flexplate. BTW, the numbers on the C4 are PCW J 289 5C 30C2 if that is of any help. It supposedly came out of a 68 Mustang with a 289. It looks like I'm going to need a new flexplate. I think a 160 tooth with 50 oz imbalance may be what I need. Does anyone make something like that?

 

nope....157 or 164...the do make a smaller flywheel count(142 i think) for must II but i have never heard of a 160.

 

It's definitely 160! I counted them three times!

 

thats a new one on me.....do you have a pic of it you can send to. please take one of front and back, and of any numbers on it. pics preferably that are large enough for me to see it well. it is hell to get old and cant see like you want...lol
but seriously,send me some pics and let me see if i can help you out on this, i am puzzled

eddie

comoshn2@aol.com

 

I'll see what I can find in the way of numbers but it has turned cold here again so it may be a few days. Thanks.

 

Doing some research this morning and found that PCW-J on my ID tag means the transmission is from a 65 Mustang with a 289. I bought it as a 68 Mustang transmission. Does that change anything or explain the 160 tooth flexplate?

Also found this information...

..."If you have any doubts as to which flexplate you have, the easiest thing to do is pull off the small inspection plate at the lower front part of the bellhousing and count the teeth as you rotate the engine by hand.It is possible that you have a 160 tooth flexplate, I pulled a C-4 out of a 67 Cougar that had a 160 tooth flexplate. I counted the teeth a couple of times as I thought I was going crazy as I had never heard of one before but I found out afterwards that they were used on some vehicles in 1967 only. Supposedly the 157 teeth flexplates will interchange fine with the 160 tooth ones but I never tried."

I have found several references to where the 157 tooth flexplate is a replacement for the 160 so my thought is order the 157 tooth flexplate with 50 oz imbalance and the C4 converter should bolt up.

 

I ordered the 157 tooth flexplate, block plate and inspection plate only to find that the 71 C4 I just bought is really an FMX of unknown year and application. The flexplate doesn't fit the converter. Back to the drawing board....