Hex 6 stocks OEM and aftermarket transmission parts for commercial trucks, heavy equipment, and off-highway machinery - from complete new and remanufactured transmissions to rebuild kits, torque converters, and individual components.
Heavy-Duty Transmission Parts in Tyler, TX
At Hex 6 Diesel Services, we provide high-quality transmission parts that bolster the performance of heavy-duty machinery and vehicles. Our inventory is full of both OEM and premium aftermarket parts sourced from the industry's leading brands and most trusted manufacturers. No matter your budget, we have something for you.
Our Truck Transmission Parts Inventory
We take pride in our extensive inventory of transmission parts designed to meet the rigorous demands of heavy-duty operations. Below is a list of our stock:
- Bearings
- Differentials
- Discs
- Drop Boxes
- Gears
- Housings
- New Transmissions
- Plates
- Reman Transmissions
- Seals
- Shafts
- Torque Converters
- Transaxles
- Transfer Cases
- Transmission Coolers
Vehicles These Are Suitable For
Our transmission parts are ideally suited for a wide array of on- and off-highway vehicles used across various sectors throughout Texas, including:
- Oil and gas industry equipment
- Agricultural machinery
- Municipal vehicles
- Heavy construction equipment
- Commercial on-highway trucks, trailers, and tankers
- Recreational vehicles and buses
- Diesel trucks
These parts are compatible with vehicles from renowned brands such as Allison, Carraro, Case, Caterpillar, Daewoo/Doosan, Dana, Kubota, Link-Belt, Mitsubishi, New Holland, Samsung, Sumitomo, Deere, Hitachi, Hyundai, JCB, Kobelco, Komatsu, Terex, Volvo, Yanmar, and ZF, ensuring that no matter your equipment brand, we have the right part for you.
Parts + Installation - Same Visit
Transmission replacement and repair is one of the most labor-intensive jobs on a commercial truck or piece of equipment. Sourcing your transmission or components from Hex 6 means our technicians can complete the repair in the same visit - no waiting on shipping, no separate scheduling.
Our transmission repair technicians are experienced across Allison automatic, Eaton Fuller manual, and ZF transmissions for both on-highway trucks and off-highway equipment.
Get in Touch Now: Call 903-343-9527!
Need reliable transmission parts? Don't hesitate—contact Hex 6 Diesel Services at 903-343-9527 today! Our expert team is ready to provide you with the best heavy-duty and truck transmission solutions.
Frequently Asked Questions
What are the signs my transmission needs repair or replacement?
For manual transmissions: difficulty shifting, grinding when changing gears, popping out of gear under load, or a clutch that's been slipping for an extended period. For automatics: delayed or harsh engagement, slipping between gears, overheating, unusual noises during operation, or a check engine light with transmission-related fault codes. In either case, catching the issue early typically means the difference between a repair and a full replacement.
What's the difference between Allison and Eaton Fuller transmissions?
Allison transmissions are fully automatic - they're common on vocational trucks, buses, and heavy equipment where automatic shifting improves productivity and reduces driver fatigue. Eaton Fuller transmissions are manual - they're the dominant platform on Class 8 line-haul trucks where driver control and fuel efficiency are priorities. Both are well-supported platforms and we stock parts for both.
Do you carry Allison transmission rebuild kits?
Yes. We stock Allison transmission service kits, filters, solenoids, valve bodies, and rebuild components for the most common Allison series used in commercial trucks and equipment.
Do you carry reman transmissions for off-highway equipment?
Yes. We carry reman transmission units for major off-highway equipment brands including Caterpillar, Komatsu, John Deere, Case, and more. Call us with your equipment's year, make, model, and transmission model number for availability.
How do I identify my transmission model?
On most Eaton Fuller transmissions, the model number is stamped on a tag on the side of the case. On Allison transmissions, it's on a tag near the oil fill tube. For equipment transmissions, the model number is typically on a plate on the transmission housing. If you can't locate it, call us with your vehicle or equipment details and we'll help identify the correct unit.
Can you help me decide between a rebuild and a full replacement?
Yes. It depends on the extent of internal wear, the age and condition of the rest of the drivetrain, and your budget. Bring your truck or equipment in and our technicians can assess the transmission condition and give you an honest recommendation before any work begins.
Areas We Also Serve For Transmission Part Sales in Texas
Hex 6 Diesel Services proudly extends its reach beyond Tyler, TX, to serve a wider area with top-tier transmission parts. Our service areas include Longview, TX; Kilgore, TX; Jacksonville, TX; Henderson, TX; Athens, TX; Palestine, TX; Sulphur Springs, TX; Marshall, TX; Nacogdoches, TX; Lufkin, TX; Corsicana, TX; Dallas, TX; Plano, TX; Garland, TX; Mesquite, TX; Terrell, TX; Greenville, TX; Mount Pleasant, TX; and Paris, TX. Wherever you are in Texas, count on us for dependable transmission part solutions.
Need Transmission Parts in Tyler, TX?
Call our parts team with your transmission model or part number and we'll get you taken care of — in stock or sourced fast. Need the repair done too? We can handle both in the same visit.
Our Customer Reviews
See what our recent customers are saying about our services.
Contact HEX 6
Hex 6 serves Tyler, TX and the surrounding East Texas area from our 36-bay shop and a fleet of mobile service trucks - available for scheduled maintenance, emergency roadside assistance, and on-site repairs for trucks, trailers, and equipment. Can't bring it to us? We'll come to you.
