Topic: ? about Marlin's clutches

[scott.475]

Guys, at what point do you suggest stepping up to the Super Heavy Duty clutch over your standard 1200lb clutch? Are the Supers available across the board? (The way I am reading the site, they only show available for the 79-91 4cyl)

Year Model Diameter Price
1979-1991 4 Cylinder (2.2 L, 2.4 L) 8 7/8 $179
1979-1991 4 Cylinder (2.2 L, 2.4 L) 8 7/8 $199 SHD
1986-1987 4 Cyl. Turbo (2.4 L) 9 5/16 $189
1992-1995 4 Cylinder (2.4 L) 9 5/16 $199
1988-1995 6 Cylinder (3.0 L) 9 5/16 $199


 

[CruzrDave]

The SHD 1600# clutch is only for the 8 7/8" clutch ( 79-91 4cyl ), 92-95 4cyl and 87-87 trubo use a 9 5/16" clutch. 88-95 v6 also uses the 9 5/16" disc but a differet presure plate. I've  used the HD 1200# and SHD 1600 # 4cyl clutchs and curently use  the 1200 # V6 kit. I love them.   The HD is great for all around use. The SHD would be better for all around with heavy towing, sand, mad and just getting on it. There is a big difference in the SHD pressure plate then the HD. If you have the 8 7/8 clutch then I would go for the SHD, if not the 1200# HD kicks butt and has ( if 9 5/16 ) more surface area.

[Marlin]

What ever clutch you choose to use, make sure when the flywheel is surfaced, to increase the flywheel step from 0.020" (factory) to a 0.026" step. Any good machine shop will understand this. This will increase the grab, and overall performance of the clutch.

Marlin

[90TOYPU]

What ever clutch you choose to use, make sure when the flywheel is surfaced, to increase the flywheel step from 0.020" (factory) to a 0.026" step. Any good machine shop will understand this. This will increase the grab, and overall performance of the clutch.

Marlin

I wish I knew that when I did mine. I'll have to remember that for the future.

[Marlin]

Today I resurfaced a 84' 22R flywheel. It only had a 0.014 step.
 Even with a new clutch, I have gotten a whimpy feeling when the machinist does not take care to do it right.
The flywheel must be stone ground on a flywheel grinder. It cannot  be cut on a lathe.
From the factory, the flywheel is designed with a 0.020 step to match the backset of the pressure plate. I have only increased, the step to 0.026" Over this, the fingers may hit the hub of the disk!

[mudrunner88]

Marlin,
  How do you measure "step", I'm just curious what this measurement is.  I have my tranny out and ready to send to you for repairs (waiting on tax return).  I'm gonna power it with a centerforce Dual Friction, and a Centerforce flywheel...Do I need to check for this on my new flywheel from centerforce?  Should I turn the NEW flywheel (kinda like how a good mechanic turns new rotors anyways) to make them "true".

Thanks

[Marlin]

Marlin,
  How do you measure "step", I'm just curious what this measurement is.  I have my tranny out and ready to send to you for repairs (waiting on tax return).  I'm gonna power it with a centerforce Dual Friction, and a Centerforce flywheel...Do I need to check for this on my new flywheel from centerforce?  Should I turn the NEW flywheel (kinda like how a good mechanic turns new rotors anyways) to make them "true".

I use a dial indicator with a 4" wide base, put the base on the raised area of the flywheel (where the disk sits) and zero the indicator. Next I slide the base toward the side of the flywheel untill the indicator reads the outer lower area (where the pressure plate bolts), and read the step. Your new heavy-duty flywheel does not need to be resurfaced like a thin rotor may!
You could also lay a straight edge acorss the flywheel, and insert feeler blades under the straight edge where the pressure plate bolts, this would also give you the same results.
You should have a 0.18" to 0.20" step. I would not increase this step. You are already making is much harder on the crankshaft thust washers with the CF dual friction and heaver flywheel

Marlin

[mudrunner88]

OK I'm on the same page as you now...I noticed that little step on the original flywheel but never saw this before on others from what I remember.  Thanks for the info.

[scott.475 [OP]]

So, is the flywheel is, essentially, bulged in the middle?