Big Truck Trans Flush

tknight

Veteran Expediter
Since I've never had a truck with auto trams . Allison unit how often should a trans filter and fluid be changed and do you use synthetic in yours
 

fatboy1

Veteran Expediter
We have changed filters every 75000 and dropped fluid every 150000 using syn Transynd that Allison recommends. Last shop said due to our current business model we could just change fluid and filters every 150000 miles. We only use Allison shops. Be careful some say they can service but they are not authorized Allison repair shop.
 

fatboy1

Veteran Expediter
Since I don't know the true history I'm taking it into Allison shop for a once over
It's the best thing to do. Ours has 1.2k and Allison shop has seen no issues so far and we keep a rigorous check on this puppy.
 

Tobster317

Expert Expediter
Owner/Operator
I have a Allison Auto. I change filters every 50-60K. I change the fluid only because I didn't know the last time it was done. But with the Transyad. They say every 500K.
 
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