I was not aware the rear endplay could be checked independently. Is that done the same way as the front ? Just with the case upside down and yanking on the output shaft ?
What front clearance is good ? The manual says .015-035.

 

rear endplay is essientially non-adjustable with the 60e. And it's usually only ever way out of spec if you are using the incorrect bearing. Which you already know because you've linked a good article up above.
.020 is looser than I usually run, but it is within spec. You can change the washer under the bearing on the input shaft/drum to change front endplay.
I usually have plenty of extra washers so its easy for me to pick and choose...if you don't have extra laying around....020 will be fine.

 

I like to use the GPZ frictions in the 3-4.....if you havent bought frictions yet

 

BW frictions are plenty capable.
GPZ are good for sure, but I've seen no significant performance benefit vs the BW. I consider them directly interchangeable in my shop

 

The borg warners are good too no doubt. I used those until I came across the GPZ. From what i understand the GPZ friction material is the same stuff used in the Z pack. I used to like the z pack for light duty stuff but i've come to the conclusion that you cannot get any heat in them or they will cone.

 

OK I adjusted the front endplay to .015.

The rear endplay is .034". Im guessing this is a function of the distance between the mainshaft shoulder and snap ring groove ? And the stack up of all the gears/hubs/thrust bearings that sit between ?. No "selective fit" parts/washers in there.

I have the band clearance at .055". I feel if I try to grind it some more while maintaining the required spherical tip I may go too far.

 

The recommended rear section end-play for the THM700-R4/ 4L60, 4L60E, 4L65E, and 4L70E from Sonnax ranges 0.0050" to 0.0350"

Ten Thousandths (0.0100") selective shims are available from Sonnax to adjust rear section end-play.
They are combined with the case Torrington bearing under the rear planetary ring-gear.

A general rule to follow in My shop for rear section end-play is three thousandths clearance for every torrington bearing and component used to measure the end-play.

-Older 4L60E Units will have 5 Torrington bearings.
-Newer 4L60E Units with have a 6TH Torrington bearing under the front planetary ring-gear.
-Some 4L60E Units that have the Sonnax Smart Shell installed will have 1 more Torrington bearing added under the reaction shell.

-With 5 Torrington bearings I am for a Minimum of 0.0150" clearance
-With 6 Torrington bearings I am for a Minimum of 0.0180" clearance
-With 7 Torrington bearings I am for a Minimum of 0.0210" clearance

For the front section end-play I would add 0.0060" minimum additional clearance for two more Torrington bearings.
In the RARE scenario that you are building a Unit where someone had replaced the original thrust washer between the pump and the reverse input drum with a Torrington bearing... Add 0.0030" more. Note: I only see this once in a blue moon from builders claiming to have a "SUPER-DUPER" Full-Roller Unit.

 

Got it wrapped up and installed in time for track nite. Thanks to this forum for the tips.

https://www.youtube.com/watch?v=rHyL...ature=youtu.be