Good evening. I have a 1970 455. I need a flywheel. Can anyone point me in the right direction to a company on-line to buy one. Having a hard time finding the right one. From what I can tell, needs to be an early 455 flywheel. Or, if anyone has a good used one for sale that would be good too. Appreciate any help. Thank you!

 

First, do you really mean flywheel for a manual trans or flexplate for an automatic? The crank flange bolt pattern changed in 1968. 1964-67 motors use one pattern, 1968-90 use another. Unless your 455 was put together with a 425 crankshaft, it uses the later style flexplate/flywheel.

 

Also, barring cracks, flywheels can be ground flat for about $100.

 

Thank you for the reply! I am going with a four speed. So, after a flywheel. I have just read that the flywheel for 68 - 73 (?) is what I need not one for clear up to the mid 80's. Having a hard time finding the correct one. Definitely not against to a used one that I can have resurfaced but having no luck with that either. If anyone knows what company I can order the correct one from or has a good used one I would buy it. Appreciate the help.

 

Was the engine originally for an automatic transmission ? Just want to add that if your crankshaft is not machined for a pilot bushing you will need to have that done also. There is a conversion bushing made that fits where the torque converter would normally go in but that still needs either the crankshaft or transmission input shaft to be modified.

 

Yup! Already drilled the crank and installed the bearing. Took a minute😂 Just need the right flywheel and I can put it together!

 

I have one. $125 + the ride. Comes with the six bolts to hold the pressure plate.

 

The 1968-up flywheels all interchange. The last year of a manual trans Olds engine was 1979 if I remember correctly, but those were only 260s. In any case, flywheel fitment and balance is the same.

 

Thanks Joe. That helps. I'll keep looking. Appreciate it!

 

Henry,
Where are you located ?

 

Grand Junction, CO

 

Here is one from RAM on Summit.
https://www.summitracing.com/parts/r...ake/oldsmobile

I sort of looks expensive at first but if you find a decent used one for $100 and then pay someone $100 to grind it, the $320 is really not that bad.

The only thing I would suggest if you buy an aftermarket one of any type is to have it checked for the proper "unbalance" If you have your original flexplate it can be compared to that. Sad to say that some of the ones I have seen lately here have been quite a bit off from what they are supposed to be.

 

Thank you Bill. I appreciate it. I do have the flex plate that came off of it. Would I just take the flex plate and flywheel to a machine shop so it could be matched up?

 

Yes. Anyone who does crankshaft balancing should be able to check it for you.

 

I have an aftermarket flywheel, its new but only drilled for a 10.5 clutch, in NJ 100 bux plus shipping.

 

Thank you guys. I got a flywheel on the way. Appreciate everyones replies. I'll have more questions I'm sure. So, talk soon.😅 Thanks!

 

which one did you go with?

Speedmaster makes them, both SFI certified on non. They also have lightened ones. Great price point.