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Old X107 Tranny Maintenance


macklugger
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Hello, Does anyone have advice on what would be a recommended fluid for my 1986 rd600 with x-107 tranny (lo-hole),I want to put a good product in there but all the stuff on the shelf in the truck parts store is for much newer equipment. thanks

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Hello, Does anyone have advice on what would be a recommended fluid for my 1986 rd600 with x-107 tranny (lo-hole),I want to put a good product in there but all the stuff on the shelf in the truck parts store is for much newer equipment. thanks

At the time of manufacture, Mack specified 85w-90 mineral based gear lube for those transmissions. I see no reason to use anything different now.

Another hint to help your transmission: don't try to engage reverse while the truck is rolling, or with the main stick already in gear.

Shift into reverse with the truck completely stopped and the main stick in neutral, then once the compound is in reverse, put the main in gear.

Those transmissions had a habit of breaking a tooth off the reverse idler gears if shifted into reverse roughly.

.

"If You Can't Shift It Smoothly, You Shouldn't Be Driving It"

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