What this tool answers
You need a first-pass hydraulic transmission-jack Working Load Limit before removing or installing a transmission, axle, or similar powertrain component under a vehicle already supported on a lift or stands. The calculator adds unit and extras, then names the smallest class on this site’s ladder (1,100, 1,322, or 1,660 lb) that clears the saddle load — or returns NO_MATCH.
Why add extras
Nameplate capacity covers everything on the saddle. Ignoring fluid, a converter counted separately, or adapters understates the load. Passenger automatics often land near 150–300 lb dry; heavy-duty truck units can exceed 400–800+ lb depending on configuration — verify your unit’s published weight.
Height and support still matter
This screen checks weight only. Confirm the jack’s published lift range against your lift height, that the saddle fits the case, and that the vehicle is independently supported. A transmission jack is not a vehicle support device.
When the answer is NO_MATCH
If saddle load exceeds 1,660 lb, this site returns NO_MATCH. Use a higher-rated transmission jack or shop equipment — do not force a 1,660 lb consumer class.
Sources
VEVOR US hydraulic transmission jack product pages for 1,100, 1,322, and 1,660 lb classes (HTTP 200, 2026-09-10). Shop practice of matching WLL to cradle load. Published passenger and truck transmission weight ranges from independent weight guides (typical ranges, not a warranty for a specific VIN).