hey guys i’ve been looking all around and can’t seem to find this information anywhere. so for separator plate holes like br,3rd i see people ask in forums what size they should go for their setup and i see guys give them sizing accordingly to there setup. i’ve been looking to how to calculate or do the math on that but cant seem to find anything only the common like .093 and etc.i would like to know how to come up with the sizing accordingly to the setups i do. currently this 60e im doing i did a 8bw stack up, wide band, sonnax servo pin with seals, corvette servo, sonnax boost valve with seals, oversized pr valve, sonnax tcc apply valve with seal, new pump rebuild with fresh machined pump, blocked 3-2 downshift valve, 2012 unit so no 3-2 control valve. 3-2 spring in afl, blocked tcc, end plugs with seals, new sonnax abuse plugs. this unit is for a 2012 silverado that is fbo e85 cammed and has a 2800 3200 ish stall. i have a new transgo plate and want to drill the holes accordingly to this setup. thanks

 

I have never seen or heard of a mathematical equation for calculating feed holes for the separator plate. Think most builders just go by experience. I myself drill conservatively and if needed will go back in and increase the hole size. I keep notes of what works for me so the next time it's not so much of a shot in the dark.

 

i have done one trans that i blocked 3-2 and i just did the br .110 and 3rd .093. i had thought they went off the 3-4 clearance and servo type. roughly what do you guys think i should do for this trans? build list on the first thread.

 

I find with the vet servo and assuming stock accum set ups as I use and stock VB accum these sizes work well . 2ND .093 . 3RD .110. 4TH .110 SERVO FEED .110. gives good overall feel not to aggressive of soft .
Bear in mind though a lot of the "FEEL" will also depend on what rear ratio you have, Stall converter, and tune pressure settings. And changes to any of the Acum or springs affect this also. But if all the other items I mention are in stock configuration those numbers should serve you well.
Now in my performance builds of my own I leave the 1-2 accum and spring stock preferring the green spring set up and then add a spring to the VB accum then use .083 for second but leave 3rd - 4th and servo feed at .110 as I use the smaller feed to mediate my overun mod downshift 3-2 bump .

 

yes servos are stock 4th servo i just flip with spring inside. by chance do you have a picture of a good separator plate diagram? with everything marked. thanks

 

I am sure some is here in my tips and tricks thread https://ls1tech.com/forums/automatic...-everyone.html But will try and find or make one later today also.

 

thanks! another question i’ve done one trans that i blocked 3-2 and i left the br checkball in. how do i block that checkball? on the separator plate i tried looking into it but i see people just say block it off but dont show how or with what. thanks

 

I dont do that particular mod, But when i do I use some 3/16th rod . Aluminum and cut a .25 long plug then center it in hole holding the pate just above a solid steel surface and hit it with a hammer till it is suck then flip over and hit a couple times to flatten other side just a little.
Others use solder drops and do the same (do not do on bonded plate) . Still other use rivets the no center hole type .

 

you prefer leaving the checkball in? got the trans in the truck shifts great i did your recommendation on the separator sizing and feels solid. thanks a lot.

 

Not so much a preference as I have done both ways and saw no discernable difference. If your working well I say leave it as you have it .