8cc Quart-Bottle Fluid Transfer Pump with 3rd Hand Adapter for Gear Oil, Transmission and Differential Fluid

Refilling a differential, transfer case, or manual transmission from a quart bottle is one of those jobs that sounds simple until you are under the truck trying to tilt a full bottle up into a fill hole that sits an inch above it. It never empties, half of it runs down your arm, and the fill plug is in a spot you cannot reach with a funnel. This pump is the cheap fix. It screws onto the 28mm cap threads of a standard quart bottle and pumps the fluid up and out through a flexible hose, so the bottle can sit on the ground while you push the oil uphill into the case.

Each stroke moves 8cc, which is double what the common 4cc bargain pumps put out, so you are not standing there pumping a hundred times per quart. The real trick is the 3rd Hand Adapter on the end of the 17-inch fill hose: it wedges into the fill hole and holds the hose there on its own, so you are not fighting to keep the tube seated with one hand while you pump with the other. It ships with both a long and a short suction tube so it draws the bottle dry whether you are running a tall or a short quart, and the whole thing tucks back into a reclosable bag between jobs.

It handles gear oil up to 80W-90, ATF, and differential fluid, so it earns a spot in the box for every fluid service you do that does not have a convenient pour. Rinse it through with mineral spirits and then hot soapy water after each use and it will be ready for the next one. For the price of a couple quarts of fluid, it turns a messy two-hands-and-a-prayer job into a clean five-minute one.