Part Category
Heavy-Duty Truck Transmission Parts
Keep your Class 8 trucks shifting and on the road with heavy-duty truck transmission parts built for over-the-road and vocational duty. JAK'S Diesel stocks rebuild and service components for manual heavy-duty truck transmissions: shafts, gears, synchronizers, bearings, seals, shift forks, and gaskets.
Not sure of the exact part on your unit? Give us the transmission make and model or the number stamped on the case and we will cross-reference OEM, competitor, and superseded numbers to get you the right component. Most orders ship same-day, with free freight over $1,000.
376
Parts Available
Showing 24 of 376 Heavy-Duty Truck Transmission Parts
GCO-6940 Mack Cover
Mack TRXL-107 TRANSMISSION 6-SPEED
403KB271P1 · 403KB256AP1
JAK'S JAKS-GCO-6940
JAK'S JAKS-GCO-6940
Available · Confirm Lead Time
$174.31
GBH-5344 Mack /
JAK'S JAKS-TRDL-TRAN-90004
Available · Confirm Lead Time
$14.95
GAC-2206 Mack Airshift
Mack TRDL/TRDLG-107,1070 TRANSMISSION 10-7 SPEED
476KB316A · 476KB316
JAK'S JAKS-GAC-2206
JAK'S JAKS-GAC-2206
Available · Confirm Lead Time
$270.82
FUL55528 Fuller UNIVERSAL
Fuller UNIVERSAL USE
55528 · 3088-55528
JAK'S JAKS-FUL55528
JAK'S JAKS-FUL55528
Available · Confirm Lead Time
$29.60
JAK'S JAKS-T2130-TRAN-90001
Available · Confirm Lead Time
$29.90
Choosing the Right Heavy-Duty Truck Transmission Parts
Heavy-duty diesel components must be matched to the exact engine and application. Before ordering from this collection, verify the part number, engine model, engine serial number, and any casting or calibration number shown on the original component.
Fitment information to have ready
- OEM, dealer, casting, or interchange part number
- Engine manufacturer, model, and engine serial number (ESN)
- Truck year and model when the component is chassis-specific
- Core details for remanufactured or exchange components
Need a fitment check?
Use the OEM cross-reference tool or text a clear photo of the part tag to (720) 445-6249. A JAK'S Diesel specialist can confirm the match before the part ships.
Can't Find the Right Part?
Text us the part number or a photo of the tag — we'll cross-reference it and quote you the right one.