Trans Fluid...

[Duckman]

I changed to Torque-Drive the other day , i dropped the valve body and cooler lines , let it sit overnight and from what i looked up on total capacity, i got it all out with this method.

I assume the converter drained 90% + ...with how much it took to refill . Also , there was nothing to prevent otherwise with the valve body out .

Just a FYI if anyone wanted to change over completely and does not want to waste it trying to flush with it or use one of those fluid exchangers.

[45Colt45]

Just an FYI, I pulled this off of the Allison website:

Q. Automatic Transmission Fluid (ATF) - Can I use synthetic fluid?
A. Any fluid that meets DEXRON III requirements is suitable for use in the Allison 1000 Series™. Always verify that the container reads DEXRON III, regardless of whether it is mineral-based or synthetic.
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Q. Automatic Transmission Fluid (ATF) - Can I use TranSynd fluid?
A. TranSynd is a fully synthetic transmission fluid available from Allison Distributors/Dealers or at GM dealers. TranSynd is a licensed DEXRON III product and has been extensively tested by Allison Engineering in a broad range of Allison products. While TranSynd was developed mainly to meet the harsh operating conditions of heavy-duty transmissions in severe operating conditions like transit buses, its benefits translate to the pickup truck market.
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Q. Automatic Transmission Fluid (ATF) - What type of Transmission fluid can I use?
A. Transmission fluids licensed by General Motors to use the trademark DEXRON III are required in the Allison 1000 Series™ transmission.