Clutches Slipping Past 5k RPM - Professional or Experienced Advice Please!
10-21-2011 | 09:05 PM
#21
TECH Senior Member
Joined: Apr 2002
Posts: 6,077
Likes: 12
From: So.Cal.
Valve float and/or the wrong harmonic damper each can make the dyno graph dip down like your pic showed (not just flatten out, but dropping)...
on LS1Tech, there are various examples of valve float, and one example of harmonic damper, all showing a significant drop.
on LS1Tech, there are various examples of valve float, and one example of harmonic damper, all showing a significant drop.
10-26-2011 | 08:08 PM
#23
Background: Have a 98 z28 with a ls2/4l60e. Car has full boltons, cam, supporting valvetrain mods, suspension, stall, etc..
I have a good understanding of how engines work, but trannys, not so much, so I'm looking for more knowledge, understanding, and expertise..
So the dyno recently confirmed the clutches are slipping past 5,000 RPM. (Ever since the first time I ran the car WOT through the gears it has trouble on the 2-3 shift and will limiter bounce untill i back out of the throttle. I always thought the shiftpoint was too high and kind of ignored this because I thought it was the tune and RARELY go WOT or even have the room to run the car through those gears. It seems like it dosn't do it everytime, but I think that is me backing off through the shift out of habit).
I have a good understanding of how engines work, but trannys, not so much, so I'm looking for more knowledge, understanding, and expertise..
So the dyno recently confirmed the clutches are slipping past 5,000 RPM. (Ever since the first time I ran the car WOT through the gears it has trouble on the 2-3 shift and will limiter bounce untill i back out of the throttle. I always thought the shiftpoint was too high and kind of ignored this because I thought it was the tune and RARELY go WOT or even have the room to run the car through those gears. It seems like it dosn't do it everytime, but I think that is me backing off through the shift out of habit).
