What tranny oil pressure using 3-4 zpak clutches?
03-07-2013, 03:44 PM
#1
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What tranny oil pressure using 3-4 zpak clutches? Swapping oem 4l60e 6 clutches for 3-4 zpak and hopefully will hold me off till i can upgrade to a PB level II. I was just wondering how much pressure i should set the tranny @ wot? thanks
03-07-2013, 04:46 PM
#2
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If you haven't bought the Z-Pak yet, you might consider newer alternatives:
https://ls1tech.com/forums/automatic...n-problem.html
I also recommend drilling the 3rd feed hole a bit and checking the entire 3rd circuit for leaks.
If you do use the Z-Pak, I've read to aim for the recommended .050 clutch clearance and no less.
With the trans apart, also make sure you have at least the newer GM heat-treated Sunshell; it has blue tabs.
With a better 3-4 clutch and new Sunshell you have addresses the two weakest points. And a boost valve (or shift kit) will make it last longer.
03-09-2013, 08:22 AM
#4
If you are going to use the Z-Pak, then go with the modified one at https://www.700r4l60e.com/store/prod...&cat=58&page=1 This has 16 one sided clutches instead of the 14 in the standard Z-Pak. I made this change many years ago and this has worked out much better. I have over 150 of these modified Z-Paks out there in matched applications with no complaints. Call me if you have any questions.
