After determining the plug size on the side of my 2024 Silverado 3500HD "Allison" branded trans I came up with an idea for an easy way to fill the unit after draining and servicing. Rather than pumping ATF into the side plug I figured a better way would be to put a plug into the hole with a hose barb on it and then run a piece of hose up to the firewall area where the dipstick SHOULD be. With a funnel its easy to pour in the fluid needed, pull the hose barb plug and replace it with the stock plug. If you measure the amount of fluid that your drain (assuming you thought the level was correct prior to the service) all you need to do is add the same amount back in and youre done.
This should simplify the service and cut down on the time.
I tried previously to add an AN fitting and a braided line in the same manner except it would be permanent but the placement of the fill hole and the access to it puts the line near one of the Cats and I wasnt confident the line would hold up to the heat so I removed it.
I have a pic of the AN line and also the stock plug for reference.
Scott
This should simplify the service and cut down on the time.
I tried previously to add an AN fitting and a braided line in the same manner except it would be permanent but the placement of the fill hole and the access to it puts the line near one of the Cats and I wasnt confident the line would hold up to the heat so I removed it.
I have a pic of the AN line and also the stock plug for reference.
Scott
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