360 With 258 Flywheel

[WraithGTO]

G'Day

I am after some advice on putting a 258 flywheel on a 360.Please and mate it to my T176 gearbox
My problem is in Australia a 360 Jeep with a manual is very rare, and trying to source a 360 flywheel is impossible in Australia
I know the 360 is externally balanced and the 258 is internally balanced.
But I have heard that a 258 flywheel can be used on a 360 if it is balanced for a 360,

Can someone give me some advice please on what is actually done to the 258 flywheel as I would like to let the machine shop know what exactly has to be done to the 258 Flywheel

Cheers

[jeepsr4ever]

You mean as far as how the weights are set on the balance. I dont have that info but I think someone here may.

[tufcj]

Welcome to Bulltear.

Do you have the 360 flexplate? You could take the 258 flywheel and 360 flexplate to a machine shop and have the flywheel "match balanced" to the flexplate. I think the 258 flywheels were drilled for a smaller clutch than the V-8s.

Brand new 360 balanced flywheels are being sold on eBay for around $125, not sure what shipping to Australia might cost though.

Bob
tufcj

[jeepsr4ever]

Welcome to Bulltear.

Do you have the 360 flexplate? You could take the 258 flywheel and 360 flexplate to a machine shop and have the flywheel "match balanced" to the flexplate. I think the 258 flywheels were drilled for a smaller clutch than the V-8s.

Brand new 360 balanced flywheels are being sold on eBay for around $125, not sure what shipping to Australia might cost though.

Bob
tufcj

They may as well dropship from China

[WraithGTO]

Thanks for the replies guys, Much appreciated

I am not sure if I still have the 360 flex plate, I will look in the morning and see,
Never thought of taking a 360 flex plate and the 258 flywheel to machine shop and get them to match the balance that way,

Not to keen on the fleabay thing, been to a few USA based retailers sites to check for new 360 flywheels, but many don't ship outside the USA 48 states or they have a minimum $500 US purchase for international orders, I tried Quadratrec for one, but I am still waiting for a reply email from them, and that was 3 weeks ago.

The Aussie CJ10 I have is hard to get parts, because it is a hybrid, it has a SJ chassis and a body similar to a CJ8, and the fenders and lights are unique to the CJ10, and me trying to fit a 360 and manual in it, makes it even uniquer

I am in the process of converting it from a 258 to a 360 and thats another problem all on it's own with the body and chassis dimensions
Do I do the conversion via FSJ info or CJ info

Cheers for the advice

[ironman_gq]

if the body is the same or close the cj8 then i would start out in that direction. Here the cj10's were mostly used for airport tugs and had 3/4 or 1 ton running gear I think.

[Wrench Man]

if the body is the same or close the cj8 then i would start out in that direction. Here the cj10's were mostly used for airport tugs and had 3/4 or 1 ton running gear I think.

AND they all had NISSAN SD33 diesels in them TOO!

[WraithGTO]

Mine had originally a 258, I gather a few in Australia came out with Nissan Ud motor motor I Think,


So the general consensus is to take the 258 Flywheel and a 360 flex plate to the machine shop and get them to match the balance of the flex plate to the flywheel? Or try and source a 360 flywheel from the USA.

One thought I had is the 360 torque converter part of the external balance of a 360 motor?
This would throw a spanner in the works if it is part of the 360 external balance

I have had another thought on the 258 flywheel, would it be possible to take my 258 flywheel and 360 crank , pistons, rods, and Harmonic balancer to a machine shop and balance the the whole rotating assembly as one unit, Would this get rid of the external balance issue of the 360 ?

Cheers for the input guys

Here is a couple of pics, I am slowly doing a restoration on the CJ10.
I temporarily have the 360 fitted with the 258 flywheel so I could do the engine mounts and cross member

[tufcj]

If you plan on rebuilding the 360, having it balanced is probably the best solution. A shop will probably just add and/or remove weight from the flywheel, and it would still be externally balanced.

In order to internally balance it, usually a heavy metal (Mallory) is added to the crank, and that can get VERY expensive.

Looking good on the resto.

Bob
tufcj