Alright, before pulling the pan and looking at the valve body, My truck runs great, It has done so for the two years since i had my tranny Built,

I don't know if its luck or the fact My tranny Builder is awesome.
I have never had a problem and the truck runs 13.5-13.6


Heres the run down on the parts I used from (KDSPERFORMACE, before the CS Problems, a lot of guys had here)

YANK TORQUE THRUSTER 3.0 STR 3000 STALL
5 PINION REAR PLANETARY
INPUT CARRIER FRONT PLANET 5 PINION HEAVY DUTY
4L60E HARDENED INPUT DRUM ASSEMBLY-LS1
MEGA HOSS COMPLETE KIT W/KEVLAR BAND,I believe it included
:-The beast Sun gear shell
-HP 1-2 accumulator spring
-13 pump vane conversion kit
-Clutch packs???
SUPERIOR SUPER SERVO
SUPERIOR OVERDRIVE SUPER SERVO
29 ELEMENT BORG WARNER SPRAG
THRUST WASHER KIT
COMPLETE BEARING KIT
COMPLETE BUSHING KIT
TYPE F-Tranny Fluid


For some reason I never went with the shift kit,
The Nelson Tune and the Servos was shifting perfect for me.

The next service I'm thinking of trying the Transgo SK,

I have seen on PATC.net
a kit to cure the 1870 code by use of a reamer to drill out the worn down valve body tcc cicuit.

What exactly does the Trango include??
NEW Transgo shift kit for the 1993-2005 4L60E, P/N 4L60E-HD2. This kit gives crisp muscle car shifts in all gears and will work in vehicles from street to full-race. With this kit you'll be able to hold 1st, 2nd, & 3rd to any RPM. You will also be able to downshift at any RPM. Along with the increased performance from you vehicle, you will also see an increase in the life of your transmission due to the reduced slippage. This is the most complete shift kit available and definitely the most reputable. This isn't the same kit as all of the others that just changes a few springs and has you drill a few holes. This kit comes with three different valves to help completely recalibrate the shifts. All parts and gaskets are included, no special tools required. This kit includes the large ".490 Boost Valve." Please don't be fooled by people claiming they have a .500 valve for the 4L60E. That valve is only for the 700R4 and isn't interchangeable.
any other advise??

 

whats P1870 ?

 

In some many words form my manuals;
Transmission component slipping.

They start the diagnostics by TCC solenoid valve for damage and than move on from there-1-2 shift solenoid, valve body etc.. all the way to the internal clucthes.

I know its probably something simple because the truck is running awesome.

 

It's hard to comment on this before I look at it,
I'm suprise no-one else has seen this on there trucks?

I have seen this kit online as well:

 

valve body... blecchh...