Looking for a New Clutch

Well, I don't know.

The 304 and the 360 use the same crank, so they should be pretty close to the same balance. But they are balanced differently, and use different flywheels. So if it's not a 360 flywheel, you'll have to decide what to do.

 

i cant help but think that it is... its the only one i have and it DID come off the engine its going back on... i drove it for 2 years before the tear down...

im gonna say, yes sir... its the sam eone...

i dont know how it couldnt be

 

You understand that the CJ-5 never came from the factory with a 360, only the 304? And that at some point, someone found a 360 that probably came from a Wagoneer and was delivered ahead of an automatic transmission, and swapped the 360 into your CJ? And that they could have not known any better, and used the original 304 flywheel?

If it's a factory flywheel, one of those two part numbers should be present - likely cast in the the flywheel in the center area that is not machined. A 304 uses a 3212651 through 1979 and a 360 uses a 3212653. If I found no number, I would assume that it is an aftermarket flywheel for a 360 (still available).

 

duly noted timgr, and i appreciate your knowledge and advice... once i run it thru the parts washer, i'll look for the numbers...

if i dont see one (there is one present, but it starts with 'M' and isnt nearly long enough) i will assume it to be aftermarket...

i know that this 360 was in the CJ when i bought it (i also know its not original), that i drove it for a while with never a problem (from what i understand, an incorrect match creates a death-shimmy from h*ll)... i also know nothings changed (other than the re-build) and that original crank IS being reused...

my thought is that if everything is the same (the crank and the flywheel) from the original... there should be no problems... i just dont see how there could be any different conclusion... unless i am missing something that was stated earlier that i didnt pick up on

 

Yeah, but like I said ... the 304 and the 360 use the same crank ... but they use different flywheels and different harmonic balancers. The only thing different in the balance would be the reciprocating pieces, ie the pistons and rods. So there are reasons why it might be ok to mix them.

HOWEVER - I know that the conventional wisdom says that you must use the correct flywheel for the specific engine. These engines are externally balanced (Detroit balance) and depend on the flywheel and damper to cancel out any bad harmonics that may arise from the combinations of parts. You could ask on one of the AMC boards, but I expect they will just tell you to get the right flywheel if this one is positively ID'd as a 304 flywheel. Omix makes new 360 flywheel replacements - that may be what you have. They use their own PN 16912.08 and an alternate AMC PN 3196929. The PNs I gave you are for a '74-79 Jeeps.

 

after a bath and some wire brushing... find to what any of the previously mentioned numbers looks like

3197219

is what i found... and based off of what is below, i resign to think that mine is in this particular lot... i measured with my calipers and the measurements are in line at the flange, the width and depth of the counter-weight 'block'...

all this discussion now has me concerned not so much with the clutch, but with the weight and balance...

will the re-build and subsequent new parts and boring throw the balance off?

http://www.planethoustonamx.com/main/amc_flywheels.htm

Version #3: #3197219 Does not have the "-C" after the casting
number, but does have "E-25" (or other letter/number combo) cast in
just above the counterweight.
Crankshaft flange recess measurement: 4.650 (approx. 5/32" larger
than the above two versions)
Counterweight position: 9:30
Exact application: unknown. Believed to be out of a 72/up 360 or 401
(304's do not have a counterweight)

and in case anyone else is curious about this... EVERY site i have looked at in the last days have ALL refernced this particlar site (linked above)...

from SoCalAMC to Greatlakes4x4 to matadorcoupe.... they ALL reference the same site

 

Just a quick word on the throwout bearing. Your shift fork must be the correct type to fit also. I ran into some problems with mine when installing because the shift fork does not fit all bearing types...my suggestion is to cross reference the one you took out if it was working correctly. I"m sure there is a cross reference somewhere that can help.

 

thanks norm!...

I still have all the old parts so if I need to I can take it/them with me if I need to...

did you have any troubles with YOUR flywheel after you got your engine back from tony?

 

I did not. For what its worth, here is my ECJ5 discussion when I did this... http://www.earlycj5.net/forums/showthread.php?58613-AMC-V8-flywheel-differences

 

yeah I read that (yours) the other day... our flywheels are in the same category...

glad to know that everything came out well for you... I expect mine will as well...

thanks for the shop hook-up AND the info...

thanks to EVERYone that has posted with info/opinions/facts... very helpful... confusing as all get out, but helpful nonetheless

 

I heard before about that, but since i run this set-up for 3 years if there was any problem i would have experience it before. I'm doing 5000-6000 miles a year and 25-30 off-road ride.

 

I'm glad you've been lucky.
I've driven in the rain on bald tires and did not get in an accident but that did not make it safe or right either