Performance 4L60E build thread
TECH Apprentice
Joined: Feb 2011
Posts: 301
Likes: 0
When you see 50% of builders saying one thing and 50% of builders saying the opposite, that often indicates it doesn't really matter.
Their purpose was to reduce wear on the 3/4 clutch when the trans is in 1st and 2nd gear, which is rarely. As mechanics complained that the 3/4 clutch was wearing out due to slippage, many started to remove the springs as that increases the clamping pressure on the clutch by about 8 lbs. Since clamping pressure at full stock line pressure is around 700 lbs, that isn't a big difference.
Therefore, I personally keep the springs in, especially in a performance build with higher line pressure (800 lbs of clamping), drilled separator plate for faster clutch engagement (and less slipping) and tighter clutch clearance.
In short, the springs reduce the clamping force by about 1%, but might reduce the wear on the clutches if you drive a lot in 1st and 2nd gear.
Their purpose was to reduce wear on the 3/4 clutch when the trans is in 1st and 2nd gear, which is rarely. As mechanics complained that the 3/4 clutch was wearing out due to slippage, many started to remove the springs as that increases the clamping pressure on the clutch by about 8 lbs. Since clamping pressure at full stock line pressure is around 700 lbs, that isn't a big difference.
Therefore, I personally keep the springs in, especially in a performance build with higher line pressure (800 lbs of clamping), drilled separator plate for faster clutch engagement (and less slipping) and tighter clutch clearance.
In short, the springs reduce the clamping force by about 1%, but might reduce the wear on the clutches if you drive a lot in 1st and 2nd gear.
