Figure 1. Tranny drain plug location
(915 type transmission)
I normally change my transmission oil at the same time I rotate my tires, as both tasks involve lifting both the front & rear ends at the same time. Here is the approach that I perform in my garage, which has a nice flat floor.
I jack the car high enough to allow all four wheels to be removed and then place the car on high quality jack stands. I make sure the car is level (eye ball relative to the floor). I then remove all four wheels. And storing each at the axel end on which it will be reinstalled.
Figure 1. Tranny drain plug location
I then remove the refill plug (which is located on the driver's side of the transmission see Figure 1) and sit the plug in a convenient and visually obvious place. I then place a pan capable of holding at least four quarts of fluid under the drain plug and then remove the drain plug. While the transmission oil is draining, I clean the drain plug and put it in a clean & obvious location. After the transmission has completely drained, I replace the drain plug & tighten it to the appropriate torque.
While some people use an oil pump to refill the transmission, I use a funnel & clear plastic tubing. I mount the funnel on a chair (or in this case a dolly) and run the tubing into the fill hole as far as it will go. I leave the collection pan centered under the fill hole (see figure 2).
Figure 2. Funnel mount & tubing run
I then fill the funnel with Swepco 201 gear lube, and make sure the oil goes into the transmission without any problems (e.g., drips, leaks), (See Figure 3.) If everything is OK I refill the funnel & go off & install one of the wheels. I finger tighten the lugs & then go back to refill the funnel. After the refill, I move on to the next wheel, until the two front & the passenger rear wheels are on their respective hubs. I then continue refilling the funnel until it begins to leak from a refill hole. I then pull the hose & let it drain back into the original container. I then tighten all the wheel lugs to the correct torque.
Figure 3. Tube from funnel into refill hole
I then refit & properly torque the refill plug. I wipe everything clean, and carefully remove the drain pan. I then reinstall the driver's side rear wheel, install the lug nuts, tighten & properly torque each lug nut.
I then recheck all the torque on the lug nuts & then lower the car.
Last, I pour the used gear lube in an old gallon jug to be taken the local auto parts store that recycles it.
