Hello, I am new to this forum and I was wondering if anybody could advise me on my overdrive unit. Is there an upgrade spring set that avoids slipping? Had it rebuilt by a professional shop, but it still seems to create slight slippage. Ive had the car for about 5 years and if I could recall like 3 years back, I had located information on this. Does anybody know more? I believe it was an article from Doug Nash about upgrading some of the internal parts, springs, clutches. Thanks