So I finally got my twin turbo silverado that Ive always wanted built almost a year in the making. I had TK performance in Dayton Ohio build my stock 6l80E to max effort with a triple disk 3200 stall. Billet input shaft and apply pistons, performance clutches upgraded rear planetary, WhateverItTakes refurbished valve body with original tecm. TK Performance is 3 hours away from me paid them right at 7000$ for the trans build and tune for bigger stall even though motor was stock at this point in time. Month of waiting get the phone call saying its ready, I get there and I was not impressed with how it was shifting at all. Very clunky and just awful compared to how it drove when I dropped it off with stock transmission. Owner of shop then decides to test drive it with me and wants to say that it was in the adaptive learning and that by the time I got back home 3 hours away it will be shifting like new. So stupid me pays him his money and drives home. By the time I get back transmission is even acting worse at this point I park it. Pull the trans out and take it to a guy 2 hours away that teachs college transmission classes. He pulls it apart doesnt find nothing internally though he would not touch the valvebody and tecm so I go pick it up from him and drop it off to WhateverItTakes and have them diagnose the valve body. Next day WIT calls and says the valvebody had a seized valve and no upgrades had been done to that valve body which as we all know 6l80/90 valve bodys have alot of issues from the factory. So they repair and upgrade that valve body and slap on the original tecm. The teacher pulling it apart does verify that there is the upgraded parts that TK Performance said he put in even though he said he upgraded the valve body and did not. So he slaps the refurbrished valve body back in and puts it back together. Fast foward, 2 days ago I just got the truck going twin turbos and alot better tune from a guy local were driving it and get into making some power and lose 5th and 6th gear. VCM Viewer shows 4th to 5th switch it hesitates for a second switches immediately to 6th if im not hard on the throttle and shudders really bad everytime I hit the gas pedal. I have to drop it in manual mode and stay in 4th. I have a VCM log that I will attach I started recording while I was on expressway while in that shudder mode. I notice when it shutters the TCC Desired Slip is 0rpm meanwhile TCC Slip goes all the way up into 1000s. I noticed the second log file I attached I enabled TCC Line Pressure and that stays at 0psi until I get into 5th gear and it shoots up to a little over 20psi then drops almost instantly to zero? Any help would be greatly appreciated. I plan on doing the work myself this time around too many jack leg transmission guys out here.
17' Silverado 5.3 Turbo Max effort 6l80E 5th and 6th shudder
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NEW!!!
I will make one calibration change for an additional $100 per change. For example, changing a shift point for a given gear is $100 vs changing a shift point and a pressure setting would be $200. That value can be used towards the full custom tuning price.
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