John S
05-02-2012, 07:32 AM
For the past several years I have had numerous issues with my clutch setup. This past winter I think I have resolved the last, and most plaguing issue stemming from the pushrod from the pedal to the MC.
Now that I am driving the car more often and more confidently another issue has arisen and I think I have a resolution but I would like to get opinions from others more experienced than me.
The Setup is a 427c.i. SBC, T-56 built by Rockland Standard gear, the engine and tranny have about 1200 miles on them. The clutch is a McLeod RST Street Twin with a McLeod 1400 hydraulic TO bearing. Bell housing is a Weir Hot Rod Products unit made to mate the LT style tranny to a gen I SBC without needing to change the input shaft. Pedal ratio is 6:1.
At McLeod's recommendation I replaced the 1" bore MC used with the original Weir TOB with a 3/4" bore MC for the McLeod TOB.
After installing the new MC and clutch assy I had to readjust my pedal travel to get full throw of the MC plunger (1.12"), in doing this my pedal is now adjusted to at rest height is almost 4" higher than my brake pedal and needs to go all the way to the floor to disengage the clutch. In essence the floor is now my pedal stop.
During normal driving everything seems to work fine, but the other day during a few very hard accelerations I could not shift from 2nd to 3rd, or 3rd to 4th. On the 2-3 shift the gears were grinding instead of sliding in to 3rd. I let off and had to reduce speed a bit to get into 3rd gear.
On hard acceleration from 3-4 it was like hitting a stop. I could not get it into 4th until I let off and cycled the clutch again.
I believe that the 3/4" mc may not push enough fluid unless I get full stroke by slamming the pedal to the floor. My idea is to go to a 7/8" MC and hopefully I should be able to readjust my pedal so that it will require less travel to fully actuate the TOB.
Does this make sense? Any other opinions or advice? Worst case could it be an issue with the tranny?
Now that I am driving the car more often and more confidently another issue has arisen and I think I have a resolution but I would like to get opinions from others more experienced than me.
The Setup is a 427c.i. SBC, T-56 built by Rockland Standard gear, the engine and tranny have about 1200 miles on them. The clutch is a McLeod RST Street Twin with a McLeod 1400 hydraulic TO bearing. Bell housing is a Weir Hot Rod Products unit made to mate the LT style tranny to a gen I SBC without needing to change the input shaft. Pedal ratio is 6:1.
At McLeod's recommendation I replaced the 1" bore MC used with the original Weir TOB with a 3/4" bore MC for the McLeod TOB.
After installing the new MC and clutch assy I had to readjust my pedal travel to get full throw of the MC plunger (1.12"), in doing this my pedal is now adjusted to at rest height is almost 4" higher than my brake pedal and needs to go all the way to the floor to disengage the clutch. In essence the floor is now my pedal stop.
During normal driving everything seems to work fine, but the other day during a few very hard accelerations I could not shift from 2nd to 3rd, or 3rd to 4th. On the 2-3 shift the gears were grinding instead of sliding in to 3rd. I let off and had to reduce speed a bit to get into 3rd gear.
On hard acceleration from 3-4 it was like hitting a stop. I could not get it into 4th until I let off and cycled the clutch again.
I believe that the 3/4" mc may not push enough fluid unless I get full stroke by slamming the pedal to the floor. My idea is to go to a 7/8" MC and hopefully I should be able to readjust my pedal so that it will require less travel to fully actuate the TOB.
Does this make sense? Any other opinions or advice? Worst case could it be an issue with the tranny?