well i know i had just posted about my new cam and converter swamp but something went wrong on the way to my buddies house, was driving down the road and kinda got onit and then bam, well my tranny blew again and boy were we all surprised, me my buddie and the trans mechanic, at first i had thought it was my flywheel but we narrowed it down to the trans, right now i just got back from my friends house who is in charge of installing my cam and new stall and i will be taking the tranny back to the mech a soon as possible, MAN I HAD A REALLY BAD DAY TODAY BUT O WELL, IF YOU WANNA PLAY U GOTTA PAY,SO THE INSTALL WILL TAKE A LITTLE LONGER THAN EXPECTED. and i am glad i to my truck to a pro cause he is going to warrenty his work, thanks joel your the best!!

 

I know how you feel on the tranny mine crapped out 2 days ago. But mine was stock so no warranty but im bout to buy a built one.

 

Damn. Sorry to hear your tranny gave up so soon. Jr will do a good job on it man. Good luck.

 

yeah i know he did an excellent job the first time i am the one with the heavy *** foot, but i like the way he builds his trannys besides he sais he will warranty his work so i dont have to pay for labor again just parts (JOELS THE MAN)

 

it seems like everyday, someone different blows up their tranny. i hope the new build works out good for you. knock on wood mine is still holding up after 10k mi.

 

i know i hope it at least hold for at least a little longer than 2 WEEKS, i guess i just really broke it in, in about 200 miles worth of hammering on it

 

Premature failure of all 700-R4 based transmissions is usually related to tollerances. Where you might be able to slap a TH400 together not too concerned about tollerences, you can't do that with these transmissions. Tollerence is critical in 700R4/4L60-E/4L65-E/4L70-E.

I only have one piece of insight to share. If you've got someone building you a 4L60-E, their bench should have on it a dial indicator, calipers, feeler guages, and somewhere nearby there should be an inventory of selective thrust washers. Most of the ones that survive are religiously blueprinted throughout the build using these tools.

 

James B can you elaborate on "tollerance"?

 

Tollerance is the allowable tightness between one moving part and another. There are specs for everything. With the pump, for example, the rotor and slide have to be matched to each other within microns and have to be measure with a micrometer. These parts wear out.
Every clutch pack has to be checked for proper freeplay with feeler guages. Every planet gear should be checked for play with feeler guages.
The biggest one is endplay. That is how much play there is moving the input shaft in and out. There is no margin for error in this. It has to be right. Input shaft must move only betwen 0.015 and 0.036" using the correct thickness selective washer. This tollerance takes into account the various expansion rates of the parts.
How many people measure the servo pin? There is a procedure for selecting the proper servo pin so that the band engages and disengages at the proper moments corresponding with 3/4 clutch apply or disengage. That's critical for the 2-3 upshift and 3-2 downshift. If the pin doesn't match the band it could flare up or bog during that shift.
There are just a lot of technical specs that need full attention in these things.