Flywheel interchange (1 Viewer)

[asu4runner]

Reading some past threads on here I’m still scratching my head a little. I dropped my flywheel (1975 2F 4 speed) off at the machine shop this week and they called me today saying this one would need shims to be good to use. I’ve never used shims before and don’t like that answer. I have a 1.5F drivetrane laying around, I’d love to pull that flywheel and get it ready to swap in. Is the 1.5F fly good to go with my new 2F clutch/ pressure plate? Searching says yes, but I need to be clear before this all goes together with a new 2F clutch and pressure plate.

 

[Pighead]

Is the 1.5F fly good to go with my new 2F clutch/ pressure plate?

Maybe. Some 1.5 Fs came with a 3-speed tranny, some with a 4-speed. Mine came with a 4-speed tranny and flywheel but 3-speed fork and pressure plate, etc.
Pics of the 1.5 flywheel might help

 

[3_puppies]

shims should never be needed or used
there are 2 flywheel setups, either a 3 finger design or a diaphragm setup
either one can be used with 3 or 4 speed behind a gas F series engine
to get a better idea of what you have or need we need more info
the flywheel setups need to stay all together and not mix and match pieces

 

[60 40]

My understanding is you can use either the heavier earlier F or the lighter 2F flywheel on either motor with either the earlier three prong or later many pronged clutches. The important part is to use all the matching accessories including the fork, bearing and pivot for either clutch and not mix and match the two different type of clutch parts.

Not sure which flywheel the F1.5 used but betting there all compatible.

 

[asu4runner]

shims should never be needed or used
there are 2 flywheel setups, either a 3 finger design or a diaphragm setup
either one can be used with 3 or 4 speed behind a gas F series engine
to get a better idea of what you have or need we need more info
the flywheel setups need to stay all together and not mix and match pieces

So you are saying that no matter how much material is removed from a 2F flywheel, it’s good to use without shims? What more info would you need, it’s a 75 2F with 4 speed, and the flywheel is pretty toasted so I’m looking to swap it. I have a 1.5F on hand and want to know if I can use it. I currently have a new clutch kit on hand for the truck, diaphragm design like it should be.

 

[asu4runner]

Maybe. Some 1.5 Fs came with a 3-speed tranny, some with a 4-speed. Mine came with a 4-speed tranny and flywheel but 3-speed fork and pressure plate, etc.
Pics of the 1.5 flywheel might help

Got it, I’ll have to pull it first. It’s mated to the back of a motor and in front of a transmission.

 

[asu4runner]

My understanding is you can use either the heavier earlier F or the lighter 2F flywheel on either motor with either the earlier three prong or later many pronged clutches. The important part is to use all the matching accessories including the fork, bearing and pivot for either clutch and not mix and match the two different type of clutch parts.

Not sure which flywheel the F1.5 used but betting there all compatible.

Ok, I have a 75 and it uses the “many fingered” version. So you are thinking, as long as I use the 1975 clutch/pressureplate/fork I should be able to swap in the earlier flywheel no problem?

 

[60 40]

Ok, I have a 75 and it uses the “many fingered” version. So you are thinking, as long as I use the 1975 clutch/pressureplate/fork I should be able to swap in the earlier flywheel no problem?

Yes that's what I am thinking......

I considered using the earlier flywheel in my 2F swap however it is heavier and although it gives (a little) more momentum for low end off road I chose to use the newer lighter "more responsive" flywheel.

 

[asu4runner]

Ok new question. Is there a maximum amount of material that can be removed from the flywheel before Toyota recommends replacing? I found outrun specs in the FSM but nothing on the flywheel itself

 

[rlong]

I don't know of a spec (another thread noted there is not one in FSM) but it makes me wonder what information / spec your machine shop is using if they indicate you will "have to" shim your flywheel. Ask them if they have a spec, or are just predicting based on depth of cut. There is quite a bit of adjustment in the cutch throw out assembly.

 

[asu4runner]

I don't know of a spec (another thread noted there is not one in FSM) but it makes me wonder what information / spec your machine shop is using if they indicate you will "have to" shim your flywheel. Ask them if they have a spec, or are just predicting based on depth of cut. There is quite a bit of adjustment in the cutch throw out assembly.

They’re used to hot rods. They are suggesting it based on the amount of material removed. I’m going to mock it up and see what it looks like I guess. I ordered a back up from classic cruisers, worst case I will return it. I’ll post pics of it mounted and maybe we can come to a group consensus lol.