Are C4 flywheels different - 200 to 302 ???

I just picked up a C4 transmission and torque conv today, from a 73 Comet w/ 302 V8.

I will eventually be using it when I restore my 72 Grabber, and convert from a 200 I6, to the 302 V8.

Is the flywheel on my current setup, the same as the flywheel I did not take from the 302 Comet's C4 tranny???

If not, I will go back and grab that too. Thanks.

- Roger

 

6 cyl's are internal balanced...V8's are external balance. The balance is in the flywheel. I think the bolt pattern might be different too.

 

The 200 has a completely different setup than the 250 I6/302. Smaller bell housing. starter ring is on the torque converter, starter location is higher. The transmission itself is basically the same but wouldn't last long behind the 302. Smaller servo, not as many clutches in the clutch packs and a few other things.
Go grab the flex plate from the 302, and don't forget the plate that goes in between the trans and block. You will need that to make everything work the way it is supposed to.

 

No such thing as a flywheel on a C-4 Automatic.

Somebody had to say it!!

 

You need the V8 flexplate and converter - The converter and flex plate take the place of the manual transmission flywheel in a car with an automatic transmission. The flexplate generally has the ring gear and any balance needed and the converter has the weight to smooth out the engine at idle.

 

Yeah...I don't know much about transmissions....I'm trying to learn as much as possible about them lately.

Craig...I'm glad you pointed out my mistake...that's how we learn from each other. I will be asking you, and Frank Fernades (Franktf), more questions as I get closer to my resto. Both of your restorations are awesome. Hell, I've been learning from many of the members on here. This truly is a great forum that you can spend hours on.

Paul, FordMaster, and RThomas, Thanks! I will go back and pickup the flexplate (I hope this is what FordMaster meant by the plate that goes between the tranny and the block). I already have the torque converter.

- Roger

 

The flexplate is the flexplate, the block plate is the thin metal piece that's sandwiched between the engine block and bellhousing. This part indexes the starter to the flexplate's ring gear. It also has to be the correct one for the size of the flexplate (157 or 164 tooth)

 

Does the 302 motor have to be removed from the car, in order to remove the flexplate and Block plate???

The tranny and torque conv are already out.

Also...are there ANY other tranny related pieces that I need to remember to grab??? ( I always collect all the nuts and bolts to use, or for sizing new ones)

For the I6/200 to V8/302 swap...the parts I grabbed:

- 302 w/ automatic Transmission with Bell Housing.
- Torque Converter from the same 302 Comet.
- splined input shaft. (the output shaft did not fall out)
- The tranny dipstick and tube.
- some other small plate that came off when removing tranny.

Parts that I still need:

- Flex Plate
- Block Plate from rear of the 302 motor

Thanks.
- Roger

 

Once you get the flexplate off the block plate will com off easily.

 

Thanks Paul.

I've spent so many hours reading your Transmission posts over the last week, that I'm seeing C4 transmissions in my sleep!!

 

I have been building so many in the last 6 months that I see them all the time!
If folks raced all year around they wouldn't all want them refreshed or new ones built at the same time.

 

so the trans from a 200ci will def not bolt up to a 302 or 351?

 

Depends on what you mean by "trans".

What I have learned from the tranny Guru's on here so far, when doing I6(170/200) to V8 302 swap: (the 6 cyl C4 tranny is weaker than the V8 C4 tranny, and the V8 tranny has more internal clutches, etc)

1. You need the FULL Transmission setup from V8 car, which includes:
- The Transmission.
- The Bell Housing (The Bell Housings are not all exactly alike).
- Transmission Double-Hump Crossmember (In case you want to run dual exhaust)
- The Tranny Dip Stick and Tube.
- The Flexplate (auto tran) or Flywheel (manual Tran)
- The Block Plate (thin plate that goes between flexplate/flywheel and Engine).
- The splined shafts (if they fall out when removing tranny).
- All nuts, bolts, and brackets.
- You might want to grab the kick down rod and linkages.
- You might want to grab the starter
- You might want to grab ALL the tranny linkages and tranny wiring harnesses depending on style of tranny setup (shifter bracket, shift linkages, column lockout rod, shifter rods, z-bar tranfers, neutral safety/backup lights switch on tranny, wiring harness connected to tranny)

Paul and the other tranny guys could tell you lots more.

- Roger

 

Short answer; NO

BUT.....
You can bolt a V8 bellhousing to the six cylinder C4 and using the block p;ate for the V8 and the flexplate and converter for the V8. That way it will "bolt up" but you will have a very weak transmission that is likely to fail within the first two years of use.

 

Roger,
If you pull the converter (and you should) with the transmission there are no shafts that can slide. The input shaft (between the converter and forward clutch) is supposed to slide in and out once the converter is removed and all you have to do is slide it back in.