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Ford Performance TREMEC T56 6-Speed Transmission - 2.66 1st Gear

Item 50429
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Ship to: Ashburn - 20149
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    Features & Details

    • Genuine Ford Performance Part
    • Magnum T56 Transmission
    • Gear Ratios: 1st 2.66; 2nd 1.78; 3rd 1.30; 4th 1.00; 5th 0.80; 6th 0.63
    • Torque Capacity - 700 lbs/Ft
    • Input Shaft - 26 Spline
    • Output Shaft - 31 Spline
    • Additional Parts Needed for Installation
    • Fits 1999-2004 Mustangs
    Tremec Magnum. Is your high performance Mustang making more power than your factory manual transmission can handle? Then you need to upgrade to the Ford PerformanceTremec Magnum T56 6-Speed Manual Transmission. This Tremec T56 is the perfect replacement for your old TR-3650 and has a torque capacity of 700 lbs./ft. making it ideal for high-performance applications such as a 5.0L Coyote engine swap.

    Built Ford Tough. The Ford PerformanceTremec Magnum T56 Transmission is equipped with a 26 spline input shaft and a 31 spline output shaft and features provisions for mechanical and electronic speedometers. This Tremec Magnum T56 Transmission is capable of handling up to 700 lb-ft of torque.

    Gear Ratios. 1st 2.66; 2nd 1.78; 3rd 1.30; 4th 1.00; 5th 0.80; 6th 0.63

    Application. The Ford Performance Tremec Magnum T56 6-Speed Manual Transmission is designed for use in the 1999 to 2004 Mustangs equipped with a small block Ford 4.6L SOHC/DOHC or 5.0L Ti-VCT V8 engine.

    Installation Notes. This Tremec T56 transmission may require a shorter driveshaft, a modified crossmember/trans mount and other minor modifications for proper installation. For SBF 302/351 Windsor engines use Quicktime bellhousing (part# 8031), for 4.6L/5.0L/5.4L modular engines use Quicktime bellhousing (part# 8080).

    NOTE: Ships Continental 48 States ONLY. No Canada, APO/FPO, Hawaii, Alaska, Puerto Rico, Guam or Us Virgin Islands.

    If shipping to a business, please include the business name. Also, after your order is placed, be prepared to let us know if you will need a Lift-Gate service. You will be contacted via email before your order ships.

    Fitment: 1999 2000 2001 2002 2003 2004 Details

    MPN# M-7003-M6266

    CA Residents: WARNING: Cancer and Reproductive Harm -

    What's in the Box
    • (1) Transmission
    Installation Info
    Tech Specs
    Will it fit my Mustang?

      Customer Photos

        Questions & Answers (17)

        5 Top Rated Questions

        Will this fit my stock bellhousing on my mustang V6 2000?

        • The Ford Performance TREMEC T56 6-Speed Transmission is for use with 999-2004 Mustangs equipped with a small block Ford 4.6L SOHC/DOHC or 5.0L Ti-VCT V8 engine. Unfortunately, this transmission will not work with your vehicle if you have the 3.8L V6 motor.

        Helpful (5)

        I have a 2004 mach 1 automatic, wanting to swap over to manual, is this direct bolt on or what will i need?

        • This would not be a direct bolt on. Please contact your installer for a comprehensive list of additional components.

        Helpful (0)

        Would this work w a 2003 mustang v6?

        • This can be used with all Mustang models, however it is not a direct bolt on application.

        Helpful (0)

        will this fit a 383 stroker?

        I have a 99gt with a cobra rearend what i need.I have a 98teskid engine with 800h.p. or more.

        • This will require custom modifications and is recommended to talk to your mechanic.

        Helpful (0)
        Post Your Question
        10 More Questions
        I have a 03 GT Could i just use a cobra driveshaft instead of having mine custom made to fit this 1 answer
        (99-04) GT. Will this transmission be a direct fit, or will I have to make any adjustments to make it to fit? 1 answer
        How hard is it to swap this to a 96 gt? 1 answer
        does anyone know what specific vehicle this transmission comes in stock? i am trying to do some research to find out how stout this transmision is. Do to mixed reveiws on AMs website. thank you for any replies 1 answer
        I have read that dealers can swap overdrive sets between 2.66 and 2.97 transmissions. Is this still true, and does American Muscle provide this modification? I'm looking for a 2.97 first gear with the .80/.63 overdrive set.. Thanks. 1 answer
        I have a stock 02 GT and my tr3650 is toast so I wanted to upgrade. My question is will the stock engine be able to handle these steep gears and what will I need to do the swap? If not what would be a good transmission to swap (preferably 6 speed)? Also will I need to change to 4:10 rear end ratio or not? Hopefully in a couple of years there will be a 5.0 coyote and I don't want to have to buy a stronger transmission so I want to set myself up good for the future but the 5.0 is only a dream right now due to school and the lack of knowledge/money. Thank You! 1 answer
        Given the difference in Input shaft and output shaft splines, is this a direct replacement for the T56 in my 2003 Cobra? Same bellhousing, shifter, speedo connections etc? 1 answer
        Im building a v6 mustang with a lot more then 400 hp, and i dont know if the current tranny will hold up. Will this tranny fit with slight mods or do i have to get a custom build? The stang will have 520HP when finish as a v6 with some of the part i built myself and need a strong manual tranny. 1 answer
        would this work well with my mach 1 2003 it just has exhuast andother bolt ons and does it come with a performance clutch? 1 answer
        Short Shifter included? Wondering if this transmission includes a short shifter and if so what brand, and if not, which short shifter would be the proper fitment? 1 answer

          Customer Reviews (6) Write a Review

          Overall Rating 3

          out of 5 stars

          Installation Time:Full Day

          • Performance Gain 4.2 4.2
          • Fit 4.8 4.8

          • 1/5

            July 05, 2017

            Be Aware

            At first, I wasn't concerned about the big lettering that says "MADE IN MEXICO" on the box. But now it's regretful. My personal T56 Magnum has a horrible internal noise at low RPM, higher load (1500-2000rpm, half throttle and higher). Almost a metal on metal growling noise or bad bearings, then goes away. It also does not like to shift into 2nd gear above 3500rpm without grinding horrendously. All clutch/flywheel parts were checked and measured before install, so it is not that. Fluid was changed and it was as metallic as a pearl paint job on a lowrider G-body. Not saying this is for all the Magnums they sell, but this is my experience so far with 800 miles on it. Looks like a call to Tremec is on the schedule as from other reviews, AM directs you to Ford Racing.


            Year: 2004 Submodel: GT

            Helpful (28)

          • 1/5

            Installation Time: Full Day

            January 01, 2017

            Poor quality

            I have put 4000 miles on my transmission and it has already broken causing me to get the car towed home over 200 miles. It has had a rattling sound since about 2000 miles Ford Performance Parts DOES NOT offer a warranty. Now im out a transmission, $3,050, a hefty tow bill, and my only vehicle i would not buy again.


            Year: 1986 Submodel: Other

            Helpful (22)

          • 1/5

            August 08, 2016

            Tremec Transmission

            They don't tell you that there is no warranty, after about 300 miles started seeing leaks on the ground, called American Mucsle, refeered me to Ford Racing, no warranty because it's consider racing equipment


            Year: 2003 Submodel: Cobra

            Helpful (20)

          • 5/5

            Installation Time: Full Day

            March 03, 2016

            Shifts like butter

            I would recommend this trans to anyone, it shifts very smooth. Gear shifts are crisp and effortless. I have about 1000 miles on mine with no complaints. It comes with a shifter base but you will need a handle for it. It does require an 03/04 cobra bellhousing, crossmember, and shortened driveshaft, or aftermarket equivalents of those. For the price I feel like you cannot beat the bang for your buck with this trans.


            Year: 2003 Submodel: Mach 1

            Helpful (19)

          • 5/5

            Installation Time: Afternoon

            February 02, 2016

            T56 Magnum for new edge mustangs

            I have not gotten to drive the car with the magnum installed yet, but I have completed installation. There are some modifications needed to make this swap happen in a new edge. Anyone not already running a Cobra T56 will need a stock Cobra bell housing, crossmember, clutch fork, possibly even clutch cable setup would be best. In addition, the crossmember holes will need to be slotted 1/4" or so since the T56 magnum sits differently in the car. Your driveshaft will need to be shortened (measure for this once installed) roughly 1", maybe more, and a 31 spline yoke is required, stock cobra is a 27 spline piece. Anyone planning on running a twin disc clutch will need an adjustable pivot ball, and modifications to the clutch fork will be required for clearance. The Magnum already has a couple slots machined in the face of it for the clutch fork to sit in, but it is still not enough room for a twin disc. I know this sounds like a ton of work but it's really not bad. I am told the swap is completely worth it! I will update after I have completed trans break in mileage with driveability etc.


            Year: 2003 Submodel: Mach 1 Tennessee

            Helpful (16)

          • 5/5

            Installation Time: Full Day

            July 21, 2013

            Love Tremec transmissions

            This is a great transmission. I love the way this thing shifts and its super easy to drive. I have not had a 6 speed before and was a little concerned about getting into 5th but after driving I have no worries. If you buy one of these make sure you can source a clutch fork if going on a cobra.


            Year: 2003 Submodel: Cobra Woodstock, GA, USA

            Helpful (21)

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