TRANSGO SK6T70 6T75 GEN1 SHIFT KITÂ Valve Body Repair Kit Instructions
- June 3, 2024
- TRANSGO
Table of Contents
SK6T70 6T75 GEN1 SHIFT KITÂ Valve Body Repair Kit
Instructions
SK6T70 6T75 GEN1 SHIFT KITÂ Valve Body Repair Kit
® SK 6T70-A Fits: 2007up Gen 1 Corrects/Prevents/Reduces Pressure Regulator & Actuator Feed System Malfunctions that lead to broken parts. Installs with No Special Tools Required! Adds over-boost protection, and improves TCC stability. “It Just Ain’t Fixed Without It” Includes Pressure Switch Repair Parts! Save a TEHCM with blown-out pressure switches setting Pressure Switch Codes!
Main Body Repairs
Front Side
Step 1 STOP! LOOK! IDENTIFY!
If your valve body has a casting step, re-use your original spring and
original retainer. Make sure the spring is not bent or crooked when installed.
If your valve body DOES OT have a casting step, USE the new NEW WHITE TCC
Control Valve spring and NEW RETAINER. (Spring sits in retainer recess.
Step 3
Remove & discard the original Pressure Regulator valve & spring. Install New
Pressure Regulator Valve, New Red Spring, original end plug & retainer.
Main Body Repairs Continued (Front Side)
Step 1
Discard the original TCC Regulator Valve and spring. Clean the New TCC
Regulator Valve provided and test fit it into the clean VB bore. If it moves
freely, remove it and put a small dab of assembly gel into the groove of the
new valve followed by the NEW Scarf Cut Ring. Now roll the small o-ring
provided on top of the scarf cut ring and place it in the freezer for 15
minutes. This will “size” the ring into the groove.
Note: The o-ring is only used as a sizing tool. To install, roll the
o-ring off the valve and set it aside. Insert the NEW Orange Spring into the
hollow end of the new valve and insert the new valve and spring into the bore
while it’s still cold, followed by the original Shift Slug, End Plug &
Retainer. It will go right in if the outer diameter of the ring is flush with
the new valve. Never force the valve in. Once you install the valve and ring–
DO NOT REMOVE IT!
Rear Body Repair
Separator Plate
No Changes
Front Channel Casting (Rear Side)
Pressure Switch Repair:
Often this trans experiences a drum or clutch piston failure often due to a
Pressure malfunction. Typically, at least 2 of the 4 pressure switches in the
assembly will also be blown out as shown below. Your choice is to repair the
TEHCM with this kit or replace it with a new TEHCM from the dealer & have it
programmed. $$$! We have provided the parts you need to repair the pressure
switches. It does take a bit of talent but mostly PATIENCE to get it done.
Many techs have performed this task with great success but it’s your choice.
You need only repair the switches that are damaged.
Testing switches:
Using a flat washer and a rubber tip blow gun, place the flat washer over
the rubber grommet and insert the blow gun tip into the center of the washer.
Aircheck each switch that is not visibly damaged and make sure they hold air.
If they do, leave them alone! If they don’t hold air, or you see they are
visibly damaged, remove the rubber grommet, and the damaged diaphragm and
ensure the switch contactor is in place. Pushing on the switch contactor, you
should feel a noticeable click as you release pressure off the contactor. Take
one of the new diaphragms, and gently pinch the diaphragm into the shape of an
upside-down taco shell. Insert it as shown below into the switch hole making
sure you guide it under the lip of the plastic. Using a small flat-blade
screwdriver, work the rest of the diaphragm into the hole until it lays flat
on the switch contactor. You may use a pencil eraser to move it left or right
till it drops in place. Continue on next page.
A Small Flat Blade
a screwdriver works best for doing this! Pinch the Grommet to start the
outer lip under the plastic. Work the outer lip under the plastic with a small
screwdriver.
Use the small screwdriver to push behind the outer lip(from the inside) to wedge it under the plastic.
You may have to pull the top of the grommet back slightly to make sure the lip is going under the plastic.
Rubber Grommet Installation
Installing the grommet is done by patiently coaxing it into position. You must
get the outer lip of the grommet to go under the plastic housing. This is what
seals the switch. Lube the grommet & diaphragm with 90w gear oil or something
equally as slippery. Treat this just like you would a small child.. with
patience! The first one is always about getting the knack of doing it. Be
successful and you’ll be putting cash in your pocket for each TEHCM you didn’t
have to buy new & then program.
Final Testing
Using a flat washer on the rubber tip of a good blow gun, make sure the
switch does not leak. It should seal tight. Do the air test with 30 psi. If it
holds, it’s ok. It will be too hard to hold the blow gun in place to use full
shop air. Final test: Use a pencil eraser to gently push into the center of
the switch to feel the switch click as you let up on it. Use one of the other
switches to compare. The new grommets will be taller than old ones. It’s OK!
