BM 112005 Rock/Race Transmission 2WD TH400 for Off-Road Competition

SKU: 112005
Fits 2WD/RWD Manual/forward pattern valve body GM SB/BB, all LS and 4.3 V6 engine applications. Use with large 1.875 Spicer yoke for 2 wheel drive models. Has 4 inch tailshaft and 7 inch separation on top bellhousing bolts
Price: $5,998.95

To place an order, please call B&M Sales at 707-544-4761

Flat rate shipping of $150.00 applies within Continental U.S.
Regular shipping rate applies to all other destination

B&M Performance and Off-Road introduces the new Rock/Race GM TH400 Automatic transmission specifically designed and built for Off-Road competition. The foundation starts with a tough and tested Reid Racing Super Hydra 400 Off-road race case and SFI 30.1 certification bellhousing that fits all Chevrolet 90 degree V8's including early and late LS engines and 4.3L V6 engines. Upgrades include a new super tough 300M (Rockwell Hardness) alloy steel 30 spline input shaft, a new Direct Drum with 34 element sprag and a wide Intermediate band for increased engine braking capability, strength and performance. Other features include a Billet 1045 alloy steel forward hub with bearing, four friction Intermediate clutch pack and a Reid Racing tailhousing with roller bearing providing superior support for the 32 spline output shaft. The forward pattern manual valve body has been recalibrated to ensure constant pressure, quick shift response and provides engine braking. The transmission is finished off with a B&M Hi-Tek finned aluminum trans pan which both increases fluid capacity and quickly dissapates heat generated by tough off-road race conditions. Handles up to 900 HP/900 LB/FT

  • Super Tough 300M Alloy Steel 30 Spline Input Shaft
  • Billet 1045 Alloy Steel Forward Hub W/Bearing
  • Bellhousing Meets SFI 30.1 Certification
  • Recalibrated Manual Valve Body
Part TypeRaceTransmission SeriesRock Race
Transmission ModelT400Tailshaft Length (In)4
Input Spline Count30Output Spline Count32
Torque Converter IncludedNoTransmission Speeds3
Valve Body ConfigurationRecalibratedValve Body PatternForward
Valve Body TypeManualTransmission Pan TypeHi-Tek Deep Cast
Transmission Pan MaterialAluminumTransmission Pan FinishNatural
Horsepower Rating (HP)900Torque Rating (Ft/Lbs)900
Dipstick includedNoCooler includedNo
Drive TypeRWDIntermediate & Low Roller ClutchesNew
Friction PlatesNewPackage ContentsTransmission
 California Proposition 65 Information

WARNING: This product can expose you to chemicals including Lead, Chromium (hexavalent compounds) and Benzene which are known to the State of California to ancer, cause birth defects, or other reproductive harm (For more information go to


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