TRANSGO SK6T70-G2 Pressure Regulator and Actuator Feed System Instructions

: June 3, 2024
: TRANSGO

Table of Contents

SK6T70-G2 Pressure Regulator and Actuator Feed System
Main Body Repairs (Front Side)
Additional Information
Documents / Resources

SK® 6T70-G2 Fits 2013-2017

SK6T70-G2 Pressure Regulator and Actuator Feed System

Corrects/Prevents/Reduces
Pressure Regulator and Actuator Feed System
Malfunctions that lead to broken parts.
Adds over-boost protection, and improves TCC stability.

This Product fits
Gen 2 Vehicles Only!
Gen 2 TEHCM’s Do Not Have Pressure Switches.
This kit does not fit Gen 1 Vehicles Gen 1 TEHCM’s have Pressure Switches.
Use Kit # SK®6T70-A 2007-2016

Note: This product requires TransGo ® # AFL-G2-TK Tool kit to repair the Actuator Feed Limit Valve.

AFL-G2-TK Tool kit works on 3 different transmissionsFits All Gen 2 Vb’s 6F35’s, 6T40s, and 6T70’s.
The 2013 model year can be a Gen 1 or a Gen 2 Transmission.
Not sure what belongs in your 2013? Check the glove box for the list of RPO codes. MHM, M7U, M7V, M7W, or M7X are listed as Gen 2. Be Careful! As of 2/5/19, we have found models up to 2016 that are still Gen1. They have RPO codes of MH2 or MH4. There may be others. All 6T70s: The vehicle, the TEHCM type, and the Transmission version are matched for Generation and Programming. Do not cross-mix them.
Impala Limited (Fleet Vehicle)

Main Body Repairs (Front Side)

Step 1.
Remove and discard the original Isolator retainer, plug, valve, and spring. Locate New Relief bushing. Insert New.250 ball first, then New Blue spring into relief bushing. Now insert the relief assembly into VB Isolator bore. In
Relief Bus
Step 2.
Remove and Measure the original PR Valve’s inner land.
If it measures .303” proceed to Step 3.
If it measures .314” Stop! It’s a Gen 1 VB and this kit does not fit.
Step 3.
If the original PR measured .303” discard the original Pressure Regulator valve and spring Install New Pressure Regulator Valve, New Green Spring, and original end plug, and retainer.

The new TransGo Gen 2 PR Valve has a positive internal balance circuit drilled thru the valve for faster and smothers regulation, it also has extended lands that seal in unused portions of the bore.

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, and 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!

Read This First:
Due to the new vent location in a Gen 2 Rear body and the amount of bore wear seen, the AFL leak can not be fixed with a “drop-in” solution for the Gen 2 Actuator Feed Limit Valve. To repair the AFL Valve bore a tool kit is also required: TransGo # AFL-G2-TK Tool kit

Tool Kit fits 3 different transmissions, just use the correct reamer guide.
Fits All Gen 2 Vb’s 6F35’s, 6T40’s and 6T70’s.
Step 1. The 6T70 Gen 2 uses the “No Groove” reamer guide. Place the no groove guide into the bore till it stops, with the stepped end out as shown. Use lots of WD-40 and low speed on your favorite portable drill, let the reamer do the cutting until it bottoms in the bore. Don’t force the reamer, the bore finish and Reamer life require a slow inward movement and lots of WD 40.

Drop-in sleeves work great on Gen 1 casting. Drop-in sleeves won’t fix a worn Gen 2 casting.
Step 2. After reaming, clean the bore and the new AFL Valve furnished in this kit. Make sure the valve is free in the bore. Install the New AFL Valve and reuse the original spring and retainer.

Additional Information

Gaskets are bonded to the plates from the factory.
Replacement is recommended to prevent cross-leaks.
No changes to stock plates.

We have seen a couple of these castings worn in the damper holes. Always look carefully.
6T-PDP-TK
Repairs Worn Dampener bores on 6T70 Gen 1and2 and also 6T40 Gen 2and3.

For the latest product release information, product part numbers, and distributor listings, log onto www.transgo.com. Have a Great Day!

02/12/21

Documents / Resources

| TRANSGO SK6T70-G2 Pressure Regulator and Actuator Feed System [pdf] Instructions
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