SpinRite wrote:
Hi, hzjcm8,
If using this method:
1. Drain old Dexron and re-fill with Transynd.
2. Remove return hose from transmission cooler and aim it into a bucket.
3. Have a helper start engine, then shut it down as soon as you see fluid color going into the bucket change over to Transynd.
4. Re-connect hose, top off with Transynd.
Does this only replace the fluid in the cooler, or does it also take care of the torque converter?
Spinrite,
Your technique is OK (kind of like a flushing machine but better). Just make sure you get the cooler hoses tight. Your technique gets everything (sump, torque converter, cooler, cooler lines). As soon as you start the engine the transmission pump is turning and will pump fluid through the torque converter and to the "converter out" circuit which is "cooler in".
No problem !!!
PS: The reason I didn't mention this is because most folks won't go to the measure and Allison doesn't recommend it for most people. The double drain does the same thing.
