Hi folks.
I'm rebuilding a 97 4L60E that basically ate itself about a year ago. I've replaced every hard part in the trans due to damage. I know--woulda been cheaper to buy a reman., but once I got into it, decided to rebuild with all the mods needed to beef it up. I'm just about done building it but the 3-4 clutch pack...I'm having trouble getting the right clearance. Everything else is in spec and ready to be put back together. I've been told several different answers to what the clearances actually should be. Some say 0.055 - 0.070 is right, others have said .040 - .065 is good. I'm not gonna race it, it'll be a daily driver for my 16-year-old.
The apply (~0.220) and backing (~0.180) plates were chewed up pretty bad so replaced them. Using ALTO steels (~0.106) and frictions (~0.080). I'm using a dial indicator setup to get more accurate measurements and with this setup, clearance is ~0.035--and is really tight between the backing plate and the top friction when checked with a gap gauge (I can get 0.045 feelers in there--but is VERY tight). I have a used backing plate that is ~0.129 and using it gives me ~0.098 clearance between the backing plate and the top friction. I also thought about grinding off 0.010 - 0.015 from the new backing plate but am hesitant to do that.
So I'm too thick or too thin on clearance depending on backing plate used. I thought about trying to use thinner frictions, a combo of different thicknesses, or mix match diff steel thicknesses until I get the right clearance--but thats a lot of $$ for a lot of extra packs of stuff I won't entirely use.
Would appreciate any advice or direction from some of you experienced builders.
thanks
I'm rebuilding a 97 4L60E that basically ate itself about a year ago. I've replaced every hard part in the trans due to damage. I know--woulda been cheaper to buy a reman., but once I got into it, decided to rebuild with all the mods needed to beef it up. I'm just about done building it but the 3-4 clutch pack...I'm having trouble getting the right clearance. Everything else is in spec and ready to be put back together. I've been told several different answers to what the clearances actually should be. Some say 0.055 - 0.070 is right, others have said .040 - .065 is good. I'm not gonna race it, it'll be a daily driver for my 16-year-old.
The apply (~0.220) and backing (~0.180) plates were chewed up pretty bad so replaced them. Using ALTO steels (~0.106) and frictions (~0.080). I'm using a dial indicator setup to get more accurate measurements and with this setup, clearance is ~0.035--and is really tight between the backing plate and the top friction when checked with a gap gauge (I can get 0.045 feelers in there--but is VERY tight). I have a used backing plate that is ~0.129 and using it gives me ~0.098 clearance between the backing plate and the top friction. I also thought about grinding off 0.010 - 0.015 from the new backing plate but am hesitant to do that.
So I'm too thick or too thin on clearance depending on backing plate used. I thought about trying to use thinner frictions, a combo of different thicknesses, or mix match diff steel thicknesses until I get the right clearance--but thats a lot of $$ for a lot of extra packs of stuff I won't entirely use.
Would appreciate any advice or direction from some of you experienced builders.
thanks