OK this is kind of long-winded, but stay with me.

The Rig: 2002 Chevvrolet Silverado 1500 4.8L/4L60E

The Mods: CAI, Predator Programmer, NOS Nitrous, Gibson Headers and Cat-Back, TCI SF3000, TCI Shift Kit, Billet Servo, 4.10 rear gears, Powertrax Locker, 20's.
(Underlined parts were not installed at beginning of scenario.)

I put my truck on the dyno a while back 3 Fridays in a row. 3 pulls each day. After the 2nd Friday, I noticed the tranny starting to slip into 2nd a little bit. It got progessively worse. Then I put my shift kit and 4.10s in. After this, it was horrible and would take several miles to get into 4th. So for a few more weeks I drove it. 2nd was now taking quite a while to come in and 4th was completely gone.

One day on the way to school, I had to slow down (stupid people) and when I started back up, I only had 1st. Changed fluid and filter...still only 1st. Tear apart tranny and find out that the forward clutch pack (first pack on bellhousing side) was absolutely burnt up. Replaced it and 2-4 band. Reassemble with TCI SF3000 converter and TCI Tranny Cooler. Now I only have 2nd and reverse (have had reverse whole time). Put it on the scan tool (GM Tech II) and the solenoids are activating. Thinking maybe I had some sticking valves, I put in a new valvebody. Still only 2nd and reverse.

Please tell me WTF is going on. I have simply run out of ideas and I am very frustrated. I also do not have $1000 to **** away on this thing. Really could use some advice. Thanks!

 

how big of a shift kit is in your tranny and what kind of power are you putting out? it could be your planeteries or your sprag. but that would usually only be the case with an extreme shift kit and some awsome horses. I have a earlier 4L60E and it had the same problem but that was because i burned the clutches out of third and fourth. i did that when i snapped the output shaft off my tourque converter. good luck

 

check your dual calibration solenoidal influx capacitor

 

It might also be the radial discombobulation matrix

 

good call, forgot all about that one! good lookin' out!

 

I personally thought it was the continuim transfunctioner. But I could be wrong.

In all seriousness, when I disassembled the tranny to replace the 3rd/4th clutches, I apparently had the valvebody gaskets off slightly. This blocked the feed holes to the solenoids. So I will be riding tomorrow.

Thanks for the input.