auto trans fit 318 and 360?

[moparmussel]

will an auto trans fit both 318 and 360?torque convertor same?

[ehostler]

Yes, the small block tranny will fit both engines. I'm not sure about the torque converter as the engines may be different in balancing. JK should be able to answer that part.

[1964 DART]

Im fairly sure the converters are the same, but, balanced differently. 360s were externally balanced meaning they had weights on the converter. 318s where internally balanced(no weights on converter). Either way you go you need to make sure the converter matches the engine.

If I am incorrect I am sure someone will correct me.

[usdart]

If you run a 318 trans with a 360 eng you will need the B&M flex plate for balance.
That is all I needed for mine to work ie; 318 cid 904 trans coupled to a 360 cid.

[dodger1]

Everything is interchangable including the converter from a bolt-on aspect, but you MUST rebalance the 318 converter to 360 specs or you'll have a hell of a shaker. Easiest and cheapest workaround is the B&M or equivalent weighted flexplate(around $80 street price) Or a factory 360 converter if you got one lying around. Also, Magnum 360's have different balance factors than early 360's so be sure to get the right product for your engine.

[moparmussel]

block is 1974 hp. how do i identify a magnum block?

[mopar_nocar]

the magnum motors didn't go into production until the early 90s. no worries with a 1974.

sb

[nhdriver]

Originally Posted by dodger1

Everything is interchangable including the converter from a bolt-on aspect, but you MUST rebalance the 318 converter to 360 specs or you'll have a hell of a shaker. Easiest and cheapest workaround is the B&M or equivalent weighted flexplate(around $80 street price) Or a factory 360 converter if you got one lying around. Also, Magnum 360's have different balance factors than early 360's so be sure to get the right product for your engine.

There is a cheaper way (then the B&M flexplate) If you have a torque convertor rebuilder in your area they can put the correct balance weights on your convertor for far less then the pricy B&M flexplate.

[dodger1]

nhdriver, agreed, IF there is a local t.c. shop thats up to getting the right weights in the right place, and the converter is already out of the car. I believe the weights are available from Mopar for a reasonable price. I just can't see getting this done for much less than a balanced flex plate but you may have that option in your neighborhood. The other plus factor is, with a balanced flex plate you have the freedom to select an aftermarket converter without worrying about the balance factor.

[70AARCuda]

basically torque converters fit the trans..not the engine...904 and 727 use different torque converters...

904s will fit both 318 and 360s...but the 360 will need an externally balance torque converter OR flex plate.

it is the same with 727...converter and flexplate must match the balancing of the engine..whether it is external or internal balanced.

[moparmussel]

thanks for all the help,thats what makes this site number ONE!

[5thAve]

Originally Posted by dodger1

nhdriver, agreed, IF there is a local t.c. shop thats up to getting the right weights in the right place, and the converter is already out of the car. I believe the weights are available from Mopar for a reasonable price. I just can't see getting this done for much less than a balanced flex plate but you may have that option in your neighborhood. The other plus factor is, with a balanced flex plate you have the freedom to select an aftermarket converter without worrying about the balance factor.

You can get the 360 weight put on several different torque converters for how much the fancy flexplate costs.

[dave571]

I think the rebuilder charged me 10 bucks to including the weights the last time I paid to have one changed up.

BUT, you do have to have a converter rebuilder, or trans shop that does that type of work available.

OR you could weld them on yourself. Not a big deal. They just go on each side of the drain plug IIRC.

Of course the other benefit of the flexplate, is you can keep it and use it again later, or if you switch to an internal balance motor, you can go back to the old converter.

[451Mopar]

On a stock application or low buck setup use the weights or stock type torque converter for the engine as described above. The cost of a rebuilt stock converter (with or without weights) is only about $75-$100.

If you are doing a performance build, then there are several advantages when using the B&M flexplate. First it is way stronger than stock, it is also SFI approved if required for your ET bracket. Besides being stronger and safer, it has three torque converter bolt patterns so it will easely bolt up to any stock or aftermarket (normal ballanced) torque converters, and finally if your building the engine it is easy to have the engine ballanced with the flexplate. Another way to look at it is you can swap torque converters and not have to worry how it would affect the engines ballance.

[wildfish72]

all coverters are the same , now if you have the 360 converter use it , if not go have it balanced at a tranny shop they did mine on my 360 truck motor,, no need to buy a flex plate unless your ganna go with a hi stall converter

[BJSracing]

I used the B&M flex plate with a /6 converter in my 360/904 combo. All that has been said is true. The plate will set you back a couple of bills. If you can have it done for a couple of penny's by a shop.

[vanderkwv]

Magnum 360's have different balance factors than early 360's so be sure to get the right product for your engine

So magnum 360's are also externally balanced? I've got a 904 that was behind a 318 that I want to put behind a 360 Magnum.

[BJSracing]

Originally Posted by vanderkwv

So magnum 360's are also externally balanced? I've got a 904 that was behind a 318 that I want to put behind a 360 Magnum.

Yes they were. You would have to do the same as far as flex plate or having a weighted converter.

[daredevil]

all this info is only good if your motor is not (built) and internally balanced.If it has been internally balanced ,weight + or- to the crankshaft you can use a factory flexplate and any convertor you want as long as it is not weighted

[dodger1]

I paid a little over $100 Can. at the local (Lordco) parts house for my B&M flexplate. The Mopar Performance weight kit (includes templates) would have cost me about $65. Plus find someone to do the welding. Seems the price of this stuff is all over the place. There are also other mfgrs. of balanced flex plates, TCI being one, I think. Internal balancing is pretty expensive - maybe a grand or more??

[daredevil]

On my 360 bracket motor internal balancing ran about 450 due to the fact I used heavier rods and they had to add 3 chunks of mallory metal.. with lite pistons and rods it can run a hundred dollars cheaper . That mallory metal is some high dollar stuff

[360duster74]

Dang you guys helped me out with one of my problems! I didnt even have to ask anyone haha!


-Thanks, Colton