WOD TH400 Transmission Mount for 1.75" Tube (Weld-On)
WA121094
The WOD TH400 Transmission Mount for 1.75" Tube provides a strong, weld-ready solution for mounting a GM Turbo TH400 transmission and Atlas transfer case to 1.75" chassis tubing. Precision machined from 1/4" high-strength steel, this mount eliminates the time and guesswork of fabricating your own drivetrain support while providing a rigid mounting point capable of handling the demands of rock crawling, Ultra4 racing, rock bouncing, and custom off-road builds.
Designed specifically for custom tube chassis fabrication, this mount positions the TH400/Atlas drivetrain securely while helping maintain proper driveline alignment and minimizing drivetrain movement under extreme torque loads. The weld-ready design integrates easily into new chassis builds or existing fabrication projects.
Includes:
- (1) WOD TH400 Transmission Mount Kit for 1.75" Chassis Tubing
Note: This is a weld-on fabrication component.
Specifications
| Specification | Details |
|---|---|
| Manufacturer | Wide Open Design |
| Product Type | Transmission Mount |
| Transmission Compatibility | GM Turbo TH400 |
| Transfer Case Compatibility | Atlas Transfer Case |
| Material | 1/4" High-Strength Steel |
| Manufacturing | Precision Machined |
| Tube Compatibility | 1.75" O.D. Chassis Tubing |
| Mounting Style | Weld-On |
| Condition | Weld-Ready |
| Hardware Included | No |
| Country of Origin | Made in USA |
Fitment
Designed For:
- GM Turbo TH400 automatic transmissions
- Atlas transfer cases
- Custom drivetrain crossmembers
- Tube chassis fabrication
Ideal Applications:
- Rock crawlers
- Rock bouncers
- Ultra4 race cars
- Trail buggies
- Competition off-road vehicles
- Custom tube chassis builds
Fitment Notes:
- Designed to weld directly to 1.75" O.D. chassis tubing.
- Verify transmission and transfer case position before final welding.
- Confirm proper driveline angles and driveshaft clearance throughout suspension travel.
- Ensure adequate clearance for exhaust, skid plates, crossmembers, hydraulic lines, and shifter linkage.
- Additional drivetrain mounts, isolators, hardware, and support structure are required.
- Professional fabrication and welding are recommended.
FAQ
Why is proper transmission mounting important?
The transmission and transfer case are structural components of the drivetrain. A rigid, properly supported mount helps maintain driveshaft alignment, reduces unwanted drivetrain movement, and minimizes stress on the transmission case, transfer case, mounts, and crossmembers during high-torque off-road use.
Why is driveline angle important?
Incorrect transmission or transfer case positioning can create excessive U-joint operating angles, driveline vibration, accelerated bearing wear, and premature universal joint failure. The complete drivetrain should be mocked up before permanently welding the mount into place.
Why mount directly to chassis tubing?
Tube chassis construction allows the drivetrain to become an integrated part of the chassis structure. Welding the mount directly to 1.75" tubing creates a compact, rigid installation while reducing unnecessary brackets and fabrication time.
Can this mount be modified?
Yes. The machined steel mount can be incorporated into custom crossmembers, gusseted for additional support, or integrated into larger chassis structures as needed. Any modifications should maintain adequate support and proper drivetrain alignment.
Does this mount include a transmission isolator?
No. This listing includes only the weld-on mounting bracket. Transmission mounts, rubber or polyurethane isolators, mounting hardware, and other drivetrain components are sold separately.
What should be checked before final welding?
Verify transmission position, Atlas transfer case clearance, driveshaft operating angles, exhaust routing, skid plate clearance, shifter linkage, crossmember placement, and suspension travel before completing final welding.
