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Speedway Motors SBCDriveline Kit,TREMEC T56 6-Speed, 700 HP
Speedway Motors SBCDriveline Kit,TREMEC T56 6-Speed, 700 HP

Speedway Motors SBCDriveline Kit,TREMEC T56 6-Speed, 700 HP

Universal Fit, 6-Speed Transmission Speeds, 700 ft./lbs. Torque, 26 Input Shaft Spline Count

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Speedway Motors SBCDriveline Kit,TREMEC T56 6-Speed, 700 HP
Speedway Motors SBCDriveline Kit,TREMEC T56 6-Speed, 700 HP
Speedway Motors SBCDriveline Kit,TREMEC T56 6-Speed, 700 HP
Speedway Motors SBCDriveline Kit,TREMEC T56 6-Speed, 700 HP
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We estimate this item will ship on or before June 15th.
Part # 91029035
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What's In The Kit
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  • Complete T-56 6 speed transmission kit is perfect for hot rods and muscle cars looking for a stout transmission upgrade
  • Fits small block Chevy 305 and 350 engines 1986 and newer with 1 piece rear main seal
  • Simplify the buying process with this complete bolt on kit
  • Add a transmission crossmember to fit your vehicle for ultimate install ease
  • Custom length drive shafts are also available to finish off the project

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Transmission Speeds:
700 ft./lbs.
Input Shaft Spline Count:
Output Shaft Spline Count:
Bellhousing Included:
Yoke Included:
Shifter Included:
First Gear Ratio:
Gear Ratio (2nd):
Gear Ratio (3rd):
Gear Ratio (4th):
Gear Ratio (5th):
Gear Ratio (6th):
For 1986-Newer one piece rear main seal SBC engines
Sold in Quantity:


We understand how valuable your time is - there just never seems to be enough hours in the day to get everything accomplished. That is why we have decided to do the hard work for you by putting together these complete driveline kits to simplify your shopping experience and save you valuable time and money! We poured over countless transmission options and associated parts and pieces, finally narrowing down the best combination to finish your drivetrain install and really move your project out of the shop and out on to the open road!

This kit features one of Tremec's most notorious transmissions - the T56 Magnum 6 speed manual transmission. This ultra high performance transmission is capable of handling up to 700 ft-lb of torque. A blend of Tremec OEM technology and the best features from the TKO series, the T56 Magnum series of transmissions provides the ultimate in brute strength and versatility to fit in to any high performance build. Features the same multiple shifter locations and dual speedmeter pickups as the TKO series, as well as effortless, short throw shifting capabilities. These performance 6 speeds feature a 2.66 gear ratio with dual overdrive gears for better fuel economy when needed.

Kit Includes:

  • (1) TREMEC T56 Magnum 6 Speed Manual Transmission
  • (1) McLeod Twin Disc Clutch Kit
  • (1) Quick Time T-56 Bellhousing
  • (1) SBC 168 Tooth Billet Flywheel
  • (1) McLeod Hydraulic Throwout Bearing
  • (1) ARP Flywheel Bolts
  • (1) ARP Pressure Plate Bolts
  • (1) TREMEC Speedometer Harness
  • (1) TREMEC Reverse Lock Out Harness
  • (1) TREMEC Reverse Switch Harness

TREMEC T56 Magnum 6-Speed Manual Transmission

  • 700 lb-ft. of torque capacity
  • Works with hydraulic clutch mechanism only
  • Dual speedo pick-ups for use with either electric or mechanical speedometers
  • Includes high-performance short-throw billet aluminum shifter
  • 26-spline input / 31-spline output
  • 2.66, 1.78, 1.30, 1.00, .80, .64 gearing

McLeod Twin Disc Clutch Kit

  • Rated up to 800 horsepower
  • 1-1/8" x 26 spline
  • 10" Clutch Discs
  • Includes pressure plate, two organic friction discs, floater plate, adapter ring and pilot tool

Quick Time T56 Adapter Bellhousing

  • Max Clutch Diameter = 11"
  • Flywheel = 168 tooth or 153 tooth
  • Full engine plate and grade 8 bolts included

SBC 168 Tooth Billet Flywheel

  • 168 tooth
  • SFI 1.1 certified
  • Manufactured from billet steel
  • Heat treated gear
  • CAD Engineering
  • CNC machined
  • Includes removable weight


style="box-sizing: border-box; color: #333333; font-family: Roboto, sans-serif; font-size: 12.8px;">GM LS T-56 Magnum Dimensions (PDF)

T-56 Magnum Service Manual (PDF)


*Note-TREMEC T56 Magnum transmissions can be shifted from two different locations - mid and rear. From the factory they are configured as a rear shift. To change the location, you must purchase a mid shift kit (sold separately). The rear shifter location is then capped off with a plate provided in the kit.

Some parts are not legal for use in California or other states with similar laws/regulations

What's In The Kit

Each kit from Speedway Motors is carefully packaged and delivered right to your door. Below is a list of all the items you should expect to receive when you order this kit. Some of these items may also be available for sale individually if you're here looking for replacement parts.
  • Speedmaster 1-229-011 168 Tooth Billet Flywheel, Chevy 350
    Qty x 1
  • ARP 200-2802 Chevy Flywheel Bolts
    Qty x 1
  • McLeod 6911-07 RST Twin Disc Clutch Kit, 10 In, Chevy 1-1/8 x 26
    Qty x 1
  • ARP 130-2201 Chevy Pressure Plate Bolts
    Qty x 1
  • McLeod 14-302 Hydraulic Throwout Bearing, T-56 Trans, 26 Spline
    Qty x 1
  • Quick Time RM-6023 Chevy V8 to T-56 Adapter Bellhousing
    Qty x 1
  • TREMEC TUET11009 GM LS T56 Magnum 6-Speed Manual Transmission
    Qty x 1
  • TREMEC 9110 Electric Speedometer Harness, Ford TKO Transmission
    Qty x 1
  • TREMEC 9111 GM Reverse Lock Out Wiring Harness, T-56 Transmission
    Qty x 1
  • TREMEC 9115 Reverse Switch Harness - GM T5, T-56 Transmission
    Qty x 1


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