How will the use of Torque-Drive™ affect the warranty coverage?
The use of Torque-Drive™ will not affect the standard Allison warranty for defects in material or workmanship and may only be challenged if there is clear evidence of a lubricant related failure, in which case AMSOIL provides full warranty coverage. Torque-Drive™ does not fulfill the Allison warranty requirements for those customers who have already purchased ETC. This is a separate contract that binds the parties according to its terms.
Customers who are considering purchasing ETC should give this careful consideration. ETC can be very costly ranging from $235 per unit for one year in school busses equipped with a 1000 model transmission to as much as $4,000 per unit for three years in transit busses equipped with a B500R. Allison customers need to ask themselves where the savings are if they have to pay big dollars for additional warranty coverage which forces them to use the most expensive transmission fluid available. If Allison customers consider Torque-Drive™ as an alternative, they will find that the standard Allison warranty for defects in material and workmanship is not compromised and AMSOIL provides additional warranty coverage for lubricant related failures indefinitely.

I would hate to get into a peeing contest with GM/Allison or Amsoil over whether or not the ATF caused a failure. If GM stated the Toruque -Drive caused the failure, then waiting for Amsoil to subrogate the claim with GM would add some delay to obtaining any compensation. This is not to say that GM couldn't disallow a claim even if Transynd was used, they will often misdiagnose a problem, or outright deny the claim at first, hoping you will accept their first pronouncement, and pay the bill yourself. Remember that, aside from meeting certain mechanical specifications, exclusive requirements are usually designed to maximize profit from return business or licensing agreements for the approval. That's why inkjet printers are so inexpensive, while ink cartridges are proportionally so expensive. Generally, I have found Amsoil products to be of good quality, but have never had experience with their warranty service. I would like to hear from someone who has, but no matter how much searching I have done there is little actual data relating to failures of Amsoil products. There is a lot of discussion as to whether or not the synthetic products are a good value, or meet advertising claims, but little factual data proving mechanical failure due to their use. All this aside, I would use Torque-Drive without hesitation, after mecanical break-in, and a complete flush and refill.