Replacing JOST landing gear requires more than matching the A400-series name. The mount position, travel, backboard, leg dimensions, crank arrangement, gearbox, and capacity all need to match the trailer installation.
JOST landing gear cross-reference table
| JOST Part Number | Mount Type | GBK Option | GBK Catalog Specifications |
|---|---|---|---|
| A400.T.17 | Outside mount | LG4007 | 17" travel, 10-hole backboard, 31" left-leg height / 27" right-leg height, 60,000 lbs lift capacity per pair |
| A401.T.17 | Inside mount | GBK 1317 | 17" travel, 10-hole backboard, 31" left-leg height / 27" right-leg height, 60,000 lbs lift capacity per pair |
The key difference: inside mount or outside mount
The A400.T.17 and A401.T.17 references are not interchangeable labels. The mounting position changes how the landing gear attaches to the trailer structure. Confirm whether the existing set is inside mount or outside mount before ordering.
What to verify before replacing landing gear
- Mount type: inside mount or outside mount
- Backboard: hole count, spacing, width, and mounting surface
- Travel: extension and retraction range
- Leg dimensions: retracted height, extended height, and left/right configuration
- Crank and gearbox: crank side, shaft position, two-speed gearbox, and cross-shaft alignment
- Feet: sand shoe or other foot configuration
- Capacity: lift and static capacity required for the trailer
- Installation clearance: frame, cross-member, handle, and nearby equipment
Why the full trailer installation still matters
A cross-reference number identifies the intended landing gear family, but trailers can have different brackets, cross-shafts, crank arrangements, and clearances. Compare the existing set and installation measurements before removing or ordering the replacement.
Browse GBK landing gear, or search the JOST cross-reference page.
Contact GBK with the JOST number and mounting photos when the mount position, backboard, or crank configuration is unclear. For fleet quantities, request wholesale pricing.
JOST and related marks belong to their respective owners. GBK is an independent aftermarket supplier and is not affiliated with, sponsored by, or endorsed by JOST. Part numbers are used for identification and cross-reference purposes only.
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