FO2501 "Big Block Ford" 351M/400/429/460 to Ford Modular(6R80) Automatic Transmission


* USES V8 STYLE 5.0L/5.4L 6R80 *



  • Can also be used on the 351M and 400 engines
  • Will also work with 4R70W, 4R75W, 10R80, 5R110, 4R100, 6R140 (w/V8 gas case)
  • Works with 6R80 transmission from a Modular V8 such as a 5.0 and 5.4 liter and be from a 2011 or newer vehicle for an aftermarket controller to work. The V6 transmissions will not work.
  • Utilizes an American built Powermaster 9605 high torque starter (included with kit)
  • Uses the stock 164 tooth Ford C6 flexplate specific to your engine. The 157 tooth will not work
  • Designed to work with the 4 stud converter found in most V8 style 6R80 transmissions or the 6 stud converter found in a 5R110.
  • CNC machined from 6061 billet aluminum (both adapter plate and converter spacer) At our shop in Wisconsin.
  • Starter can be replaced without removing the transmission and the kit doesn't require any cutting or grinding of ANY bolt hole component. Bolts on easily with minimal tools


Are you using a transmission that needs a shift computer? We offer package deals that include US Shift stand-alone controllers. If have a 6R80 we recommend the Quick 6 stand-alone. You will save $125.00 on your Speed Gems adaptor kit when bundled together. 

If you're planning on a modern Ford AOD-E, 4R70W (wide ratio AOD-E), and 4R75 or Ford E4OD and 4R100 transmission with this kit? By adding a US Shift Quick 4 stand-alone transmission controller you will save $100 dollars off of the cost of your Speed Gems adapter kit. 

We have additional options from US Shift. Please give us a call or email us if you're not seeing what you need!

    Materials Included:

    (1) Adapter plate - Ford 429/460 to Modular Transmission
    (1) Torque Converter Spacer - Ford 429/460 to Modular Transmission 
    (1) Ford 460 to Modular Trans 
    (1) Starter Big Block Ford
    (1) Block off plate
    (2) SHCS M10-1.5 x 65
    (1) SHCS M10-1.5 x 70
    (7) SHCS M10-1.5 x 75
    (1) SHCS M8-1.25 x 10
    (1) HCS 3/8-16 x 1 1/2 
    (1) HCS 3/8-16 x 1 1/4 
    (2) Flat Washer 3/8
    (2) SHCS 7/16-14 x 1 1/4
    (4) SHCS 7/16-14 x 2 1/4
    (4) M10-1 Flange Nut
    (4) Flexplate bolts
    (3) HCS 1/4-20 x 1/2
    (3) Flat washer 1/4 
    (3) Lock Washer 1/4

    *Matching our adapter kits with your engine can be tricky. If you are unsure of which kit to purchase for your engine, please call customer service at (763) 767-4480. Speed Gems is not responsible for return shipping costs of mismatched kits.

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