I thought for sure that when I speed shifted between gears that the clutch was slipping badly and it was time for a new one. I heard about the "drill mod" and did that tonight. I took my time and it took about 2hrs. After finishing I drove the car and the clutch pedal is a completely different feeling. There is no more restriction in the hydraulic line and it is very smooth. I HIGHLY RECOMMEND this mod for anyone having clutch slippage on a stock LS1 clutch!!!

 

Thanks for that report.

I'm getting my tranny rebuilt soon and thought about doing this as well, you just confirmed it for me.

 

what's the drill mod exactly? i've never heard of that one before but i'm curious to know what it is now...thanks

 

McLeod Master Cylinder and Drill Mod Install

these are the instructions that i followed, i didn't replace the master cylinder, just the drill mod

if that link doesn't work there are other links in this forum that will work

 

hmm....i don't think your link worked. but if you go to www.installuniversity.com you will find it on their site. i did the drill mod when i did my clutch and all that other stuff....it is definatly the way to go

 

Would it have the same effect on a LS6 clutch?

 

^^^do it and report back.
Allowing more fluid to pass through could not hurt it.

 

I also agree! Night and day! Shifts like butta

 

will this work for my 95 t/a im not sure if it is applicable to lt1 cars does anyone know for sure