Pushes ATF up through the side fill plug on sealed transmissions like the 6L80, 6R80 and ZF 8HP so you can refill on the lift without a dipstick.
If you just dropped the pan on a 6L80 Silverado, a Tahoe, a 6R80 F-150 or a ZF eight-speed and found there is no dipstick tube to pour into, this is the tool you are missing. The OEMTOOLS 24441 manual ATF filler holds 3 liters of fluid, builds pressure with a hand pump, and pushes ATF into the side fill or check plug of a sealed transmission while the vehicle is on the lift. It is built for DIYers and small shops that service sealed units without shop air or a powered fluid exchanger.
A sealed transmission sets its own level: the check plug sits at the correct fluid height, and the job is to add fluid until it just starts to run out of that plug at the right temperature. Gravity cannot get fluid uphill into the case, which is why a funnel and hose turn into a mess. The 24441 reservoir is pressurized by its pump handle, and per the manufacturer's manual it is rated to a maximum of 20 PSI with a pressure gauge and a pressure relief valve on the lid. Once you have pumped it up, fluid flows on its own through the dispensing hose, so you are not working a lever the whole time. A valve at the end of the hose lets you stop flow right at the plug when fluid starts to weep back.
The fill tool gets fluid in; the level check decides when to stop. On the 6L80, GM's owner information calls for DEXRON VI, about 6 quarts for a pan and filter change, and a hot level check at 71-93 C (160-200 F) with the engine idling. Fill until fluid runs from the check plug, then recheck hot before you torque the plug. Our 6L80 transmission service guide walks through the full temperature check, and if a fluid change was meant to cure shudder, read the 6L80 common problems guide first so you know whether fluid alone will fix it.
This is a universal fill tool, not a part that bolts to one transmission. Threaded adapters for common domestic and import case plugs are included, covering the GM 6L80 and 6L90, Ford 6R80 and 10R80, ZF 6HP and 8HP, VW and Audi units, and many late-model Asian transmissions with a side fill plug. Thread pitches vary by maker, so check that one of the supplied adapters matches your plug, or send us the vehicle year and VIN and we will confirm. More service parts for GM six-speeds are in our 6L80 collection.
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Yes. Thread the matching adapter into the fill or check plug, pressurize the reservoir and dispense until fluid runs back out of the check plug, then do GM's hot level check with the engine idling.
No. The 24441 is pressurized by its own hand pump. The manufacturer rates the reservoir to a maximum of 20 PSI, with a gauge and relief valve on the lid.
3 liters, about 3.1 quarts. A 6L80 pan and filter service takes roughly 6 quarts, so expect to refill the reservoir once.
The kit includes adapters for common domestic and import fill plugs, including GM 6L80/6L90, Ford 6R80 and 10R80, ZF 6HP/8HP and many VW, Audi and Asian units. Check your plug against the adapters, or send us year and VIN.
It works on side-fill differentials, transfer cases and manual gearboxes, and the manufacturer lists brake fluid as a use. Clean the reservoir between fluid types so nothing is cross-contaminated.
