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B&M Traveler Series GM TH350 Transmission for 4-Wheel Drive ApplicationsYouTube Button

B&M Traveler Automatic Transmission for 4 Wheel Drive - GM TH350

1965-1991 Chevrolet Small Block and Big Block 4-Wheel Drive, Automatic Shift Valve Body.

PART# 103005

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The B&M Traveler series TH350 transmission is designed for 4-Wheel Drive applications and bolts directly to all GM NP203 and NP205 transfer cases with a 27-spline input. The Traveler transmissions are built for light trucks, off-road and RV/towing applications and feature high performance friction plates, rebuilt pump, recalibrated forward pattern valve body for medium/firm shifts and are capable of handling up to 425hp. The Traveler series also includes increased oil flow, which aids in cooler operation under heavy duty use and towing. B&M strongly recommends protecting your investment by adding a B&M Hi-Tek SuperCooler and new flexplate with all new transmission installations. Note: Does not include torque convertor, speedometer gear or dipstick.


  • Built for Tough Off-Road and Towing Conditions
  • Recalibrated Forward Pattern Valve Body
  • Fits NP203 and NP205 Transfer Cases
  • High Performance Friction Plates
  • Rebuilt Heavy Duty Pump
  • For GM 4WD Applications
  • Increased Oil Flow


Automotive Item GradeHigh Performance
Brake IncludedNo
Built-In Transmission ShieldNo
Case MaterialCast Aluminum
Control TypeHydraulic
Converter Stall Speed (RPM)N/A
Cooler includedNo
Core Change ApplicableNo
Dipstick includedNo
Drive Type4WD
Emission Code5
Friction PlatesNew
Gear Ratio-First2.52
Gear Ratio-Second1.52
Gear Ratio-Third1.00
Horsepower Rating (HP)450
Manual Valve BodyNo
Part TypeOff Road
Product TypeAutomatic Transmission Assembly
Reverse Gear Ratio1.93
Reverse PatternNo
Tailshaft Length (In)N/A
Torque Converter IncludedNo
Torque Converter SeriesN/A
Torque Rating (Ft/Lbs)400
Transmission ModelTH350
Transmission Pan FinishChrome
Transmission Pan MaterialSteel
Transmission Pan TypeStamped
Transmission SeriesTraveler
Transmission Speeds3
Transmission TypeTH350
Valve Body ConfigurationRecalibrated
Valve Body PatternForward
Valve Body TypeAutomatic
California Proposition 65 Chemical NameBenzene
Chromium (hexavalent compounds)
California Proposition 65 RequiredYes
Part Number103005



This part is legal for sale or use on Emissions Controlled Vehicles, Uncontrolled (Non-Emissions Controlled) Vehicles, and Racing Use Only Vehicles because it does not affect vehicle emissions and is not covered by emissions regulations.

Tech Resources

Fits 1965-1991 Chevrolet Small Block and Big Block 4-Wheel Drive, Automatic Shift Valve Body.


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