Clutch and flywheel question

[Matt Cole]

In reference to the SMF conversion on a g56 trans truck, is the Flywheel different between a single disc clutch and dual disc clutch?

 

[BigPapa]

Absolutely.

 

[Matt Cole]

Absolutely.

Thank you! I assumed so but having never seen both I didn’t know for sure.

 

[RVTRKN]

I never even concidered they were different. So the flywheel for a South Bend Clutch SMF for a single disk clutch, is different than a South Bend Clutch SMF flywheel for a dual disk clutch?

 

[BigPapa]

 

[RVTRKN]

Learn something new every day.

 

[BigPapa]

Without spacing the transmission away from the engine, the DD still has to be the same thickness as the SD.

Then, you have your TD.

 

[GCroyle]

BigPapa,

Just FYI

Doesn't matter who supplied that TD. Mixing a lever type cover with a hydraulic constant contact release system. That lever type iin the installed state is already constantly "riding the clutch" A diaphragm can handle it, levers, pins and struts or yokes nope.

Happy 2020

Gary

 

[BigPapa]

I’m sure you’re correct there Captain Clutch...

I was just trying to demonstrate the differences between the flywheels. I imagine since that’s primarily a pulling clutch, they’re not really concerned about the lifespan of the throw out bearing...

On a side note, I saw you’re comment in another thread that you’d spent three LONG years in Memphis. Ain’t that the truth! I spent a week there one weekend......

 

[GCroyle]

Scott,

Pics are showing examples of all three systems as you noted.

I think three things created the demise of the old school periodic clutch adjustment.

1. Angular contact bearing. It's not a true thrust or radial bearing. Line of contact is roughly 45 deg thru inner, outer race and ball. Used to be thrust bearing was king.
2. Self aligning. Allows bearing assy to float a bit and find it's own sweet spot, centering on clutch center line. Often a new bearing looks off center, no worries. Snap it around l-r, up-down. It'll find its home on its own after installed.
3. Diaphragm clutch technology. The spring tips aren't affected by a bearing riding on them like old school levers are with their pivot points and friction.

Then add that an easily built hyd release system that the routing can be made with a high pressure plastic line in many cases and easy to push. That combination lead to the modern widely used clutch release system.

My second car and first clutch also was a 1975 Camaro 350 4 spd. Had to order it special. It's a few months into ownership and I'm going home from Euclid Inc. yup earthmovers east of Cleveland to parents house west of Cleveland and just a few miles E of downtown my L foot bumps a hanging no longer functioning clutch pedal. NOW WHAT! I carefully exit and park at Burke lakefront airport. No harm. What happened?

The adjusting linkage FELL OFF, gone, Houdini, nada ect.

Dealership towed it in, claimed I hit something. But no marks to be found on anything. Lever on bellcrank was off several degrees, chewed up cotter pin. I tweaked and made a braided safety strap so if it ever happened again at least it would be hanging on the strap.

And at 7000 miles I replaced the clutch on own in my parents garage cause it chattered day one from delivery, Chevy said tough beans kid. the diaphragm spring tips had a extreme irregular presentation Runout, uneven lift=chatter. Four years later I accidentally started my clutch career.

Still shifting.

Gary