LS Swap - Stronger Clutch options? (6 Viewers)

[Augustiron]

I was told the early asian crt-012 slave works better with the stock master, and it is working for me.

 

[Downey]

So what's the fix for the lack of throw out of the OEM slave cylinder; or atleast thats what i gathered from what you said.

assuming that was the problem

Don’t know, some here on Mud have talked about fixes, mixing different masters with different slaves ???, which should give easy pedal very stiff pedal ???

 

[Robs76fj40]

My set up is un-tested at this point as the truck is still coming together- however I bought the Advance Adapters LS Centerforce clutch kit. Their Flywheel is basically "offset" machined to compensate for the difference in the LS crank "snout" length versus the old Gen 2 SBC's. I'm running and Gen IV 5.3 with an otherwise stock drivetrain(4 speed trans and T-case). As Jim mentioned above, slave cylinder adjusted is critical, even with the old school SBC's(in my opinion anyway). Good luck

 

[69LC]

Hey, im sure there are threads about this.

I bought a LUK clutch but the center section of the clutch has failed. it has 25 miles on the odometer and has already failed...

are there a more heavy duty clutchs, i have a H42 4 speed behind a ~500hp 6.0 ls

Which year 6.0 are you running? I’ve learned (hopefully correct info) that the 99-2000 6.0s had the long snout crank which can use a same vintage 5.7 firebird clutch setup with sbc/bbc dimensions.

My stuff is still in boxes and pieces so I can’t verify this is gunna work.

 

[pbgbottle]

If it was the hub in the clutch disc that has wallowed itself loose and is wobbly it is an alignment issue. Been there done that. Check bellhousing fit to engine. Flush. And then fit bellhousing to Tranny. Mine had a dowel pin to long and was causing a slight misalignment. Did it round out the pilot bearing also ? It usually does. Check your pilot bearing for wear also.
If it is the clutch disc hub that has become loose and wobbly then it’s an alignment issue.
I don’t use luk. Post pic of pressure plate. There is another version made by someone else. CA4573. The non LUk pressure plate low profile works better with the Toyota hydraulic. Post pics if possible.

 

[jim land]

This old thread could help

Thread 'Chevota clutch issues'

Nov 7, 2010

I've got a '77 fj40 with a '72 SBC mated to a stock '77 4 speed Toyota tranny. This V8 conversion was done by the previos owner in 1982 using a fabbed adapter plate that offsets the trans from the Chevy bellhousing by .580 thick. When i rebuilt the motor in 2001 i went with a Centerforce Chevota clutch from Downey Offroad.This Cruiser has not been my daily driver up until 3 months ago and now im having issues with the clutch .
Problem: A few weeks ago, i started having trouble shifting into reverse. The clutch felt like it wasnt disingaged enough and the gears were grinding. I adjusted...

• Jerzfj40
• Replies: 16
• Forum: 40- / 55-Series Tech