78 FJ40 Clutch Confusion (1 Viewer)

Joined
Sep 27, 2010
Messages
7
Mating an Orion to my 420 and realized i need to replace the clutch. Since it has been 15 years since I have done any research on these clutches, I was a little overwhelmed with the choices out there. Diaphram style, 3 finger style, Centerforce, Centerforce Dual friction and full master kit w/ slave rebuild and lines! I have only looked on MAF as of now. Not sure what to buy for a replacement. I am running the original 6 and needs yalls advice on which one is being used and in what application. I will be doing a moderate amount of rockin in the cruiser but will be joy riding on the pavements on the weekend. Any input is appreciated!
 
Joined
Jan 30, 2008
Messages
1,453
Location
Mt. Pleasant S.C.
 
 
I spent the extra cash and got the centerforce dual friction. A little pricy but it is incredible on the rocks and will not slip on you. I'm running an F motor with a four speed tranny with the threed speed transfer case, 4:88's and 35's. I just throw it in 4lo and drive it like an automatic.
 
Joined
Jan 30, 2008
Messages
1,453
Location
Mt. Pleasant S.C.
 
 
yep, Had a stock toyota clutch that was in the 40 when I got it that started slipping. It lasted two trips to Tellico. I replaced it with a "stock" unit from one of the Landcruiser suppliers (cant remember if it was Man -a -Fre or CCOT) and it lasted about a year and a half. I guess it really depends on how modified your rig is and how you drive it. If mine was a dd I probably wouldn't need the high dollar clutch but mine is a trail rig with limited road time.
 

Living in the Past

SILVER Star
Joined
Apr 21, 2005
Messages
19,137
 
 
 
Your 78 came with the four speed clutch but since you have a SM420 which required a three bell housing change make sure what you have now. The three speed used a different system than the four speed. If you have a stamped clutch fork you are setup for a three speed. Case clutch fork and it's a four speed. The three speed only works with the three finger pressure plate. It's easy to change over to four diaphram style but besides the throw-out bearing you need to use the case clutch fork and special acorn shaped bolt the fork pevots off of.
 
Joined
May 7, 2006
Messages
4,884
Location
erie pa
 
 
i have an original 74 4speed with a 3 finger clutch and a cast fork from the factory.!!!!im geussing the parts will interchange.
 

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