If you’re not a professional transmission shop and don’t have the money for a full-time transmission jack, you might appreciate this more economical solution, Harbor Freight’s Transmission Adapter. The adapter is meant to work with a Harbor Freight jack with a 1-1/4″ saddle, but mine fit on my Craftsman two-and-a-half-ton floor jack — and no parallel universes opened when the two tools met.
The adapter provides 60-degree-forward and 10-degree-reverse tilt, and its “feet” slide to accommodate your transmission sides. It comes with a single safety chain that you tighten with a screw hook. There are additional openings to add more ratchet straps or chains if you want — I use two straps with my transmission since it’s v-shaped on the bottom.
A note about any transmission jacks of this type: Unless you can get your vehicle at least three feet in the air it won’t clear the jack and adapter — you’ll need to do your service with the jack lowered under the vehicle.
The Harbor Freight transmission adapter normally sells for $43, and they often put it on sale.
Transmission Adapter [Harbor Freight]