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SR Performance Aluminum One Piece Driveshaft - 31 Spline (96-04 GT; 96-98 Cobra; 03-04 Mach 1)

Market Price $499.99 You Save 10% ($50.00)
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$449.99 (each)

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  • Item 12681

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    Features, Video & Details

    • Quicker Acceleration
    • More Responsive Engine
    • Seamless 1-Piece Aluminum Tubing
    • 31 Spline Design
    • 45.5" Length Shaft
    • Includes New Pinion Flange
    • Made in the USA
    • Fits Manual 1996-2004 GT, Bullitt, Mach 1 and 1996-1998 Cobra Mustangs

    Review & Installation Video

    Review & Install Video

    So the SR Performance Aluminum One Piece Driveshaft is a great option for the '96 through '04 Mustang owners out there that are looking to shed some weight from their drive train along with strengthening their components, proving their launches an acceleration. That factory driveshaft is not only heavy but it's just not that tough and it's more likely to fail, especially if you're gonna be dumping your clutch a lot on the track. Install wise, I'll be giving this a light to a moderate one outta three wrenches on the difficulty meter here and about a two-hour job. I'll have a little bit more coming up for you on that later. So you've had your Mustang for a while or maybe it's just new to you and you're wondering, "Why get an aluminum driveshaft or just a new one?" Well one aftermarket driveshaft does a lot much more than just shed actual weight off the car. Less weight in terms of a driveshaft and how it functions means your engine can ride faster and that results in putting more power down and reducing parasitic loss. Now the stock Mustang driveshaft is made from a heavy steel and is more or less designed for the life of the car. Now it produces a fair amount of noise, vibration, and harshness, and it's not really geared towards a car that seeing a lotta track time or just in general, spirited driving. So the heavier any rotating part on your car is, the more engine power is used to move them. When you lower that weight and free up the engine, you make it work less, which again, is gonna result in getting you into that power band that much quicker. Now this aluminum driveshaft is not only gonna be a great option from a weight savings perspective as by greatly reducing that rotating mass, you're gonna be improving your Mustang's quarter mile times, along with off-the-line acceleration, and even cutting down on your 60 foots. But on-road benefits aside here, guys, we're gonna see that this is manufactured out of a lightweight three and a half inch diameter Alcoa's certified 6061-T6 Aluminum, that is gonna come along equipped with a new pinion flange and a 1330 series U-joint. I can't stress it enough here, that weight savings is another great variable about this one piece driveshaft versus the factory equipment, as this is gonna come in at 13 pounds over the factory's 21 pounds, which is apparent right outta the box. Now it's not just a matter of it being a slight diet. Shaving that weight is amplified as cutting down on that rotational mass, in turn, creates better performance. Looking at the pricing, guys, expect to be spending around 450 bucks to get this onto your car. And then switching gears to the installation portion of the video. Like I said a little bit earlier, this is going to warrant an easy but an involved one outta three wrenches on our difficulty meter here, about a two-hour job with a fair amount of tools. So you'll start by getting your rear end up in the air either with a pair stands or on race ramps and then locate the four bolts that secure the pinion flange, which is located at the rear of the car. Now you may want to use a swivel to get a good grip on the bolts, and if they're rusted, make sure to hit 'em with a lotta lube or heat 'em up. So if you're using ramps and you have difficulty accessing all of the pinion flange bolts, simply lift the rear up slightly and then just rotate the drive shaft. And before removing all four bolts, make sure to get a jack stand or a similar support underneath the old driveshaft just to prevent it from dropping down. But once they're loose, you're gonna wanna slide the driveshaft rearward and away from the trans. You're gonna wanna watch out for any fluid that may be leaking out of the trans as well. Now if the rear is elevated higher than the front, this should not be an issue for you. But once you're done there, guys, carefully slide the yoke of the new driveshaft into the end of the transmission and then locate the four original bolt holes in the diff pinion flange, reinstall the original bolts, and then tighten and torque them to spec. So that'll wrap up my quick review of the SR Performance Aluminum One Piece 31 Spline Driveshaft, fitting the '96 through '04 Mustang GT, the '03 through '04 Mach 1, and the '96 through the '98 Cobra, that can be found right here at

    Faster Quarters. Shed up to 29 pounds of rotating mass and shave up to 0.2 seconds off your quarter mile time with this 31-Spline SR Performance Aluminum One Piece Driveshaft.

    Superior Quality. Unlike other designs which use an adapter - causing vibration and even failure - this SR Performance Driveshaft features a completely new pinion flange for superior durability and performance. It features 1330 series U-joints and is a solid, 1-piece design made with 3.5" Alcoa certified 6061 aluminum tubing.

    Precision Crafted. When selecting a driveshaft for your Mustang, you want one that has been made to the highest standards for peace of mind. This aluminum driveshaft has been balanced using Schenck military grade equipment to guarantee vibration-free performance.

    Made in the USA. Unlike other aftermarket driveshafts, every part of this driveshaft is made in the USA to ensure the highest level of performance.

    Application. This 31 Spline SR Performance Aluminum One Piece Driveshaft has been designed for the 1996-2004 manual transmission Mustangs that require a 45.5" long driveshaft including the GT, Bullitt, Mach 1 and 1996-1998 SVT Cobra models.

    SR Performance

    Fitment: 1996 1997 1998 1999 2000 2001 2002 2003 2004 Details

    MPN# 12681

    CA Residents: WARNING: Cancer and Reproductive Harm -

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

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        Questions & Answers (14)

        5 Top Rated Questions

        will this driveshaft fit on a 2003 ford mustang gt with an automatic transmission?

        • This 31 Spline SR Performance Aluminum One Piece Driveshaft has been designed for the 1996-2004 manual transmission Mustangs meaning it will not properly install on your automatic transmission.

        Helpful (3)

        Which driveshaft would you recommend going with for 99-04 Mustang GT, the Ford performance one or SR performance? Or which one is better?

        I put in a rebuilt 8.8 rear end with 4.10 gears on my 1996 ford mustang v6 automatic. Is this the drive shaft (31 spline) I should get or should i buy the v6 (28 spline) drive shaft?

        would this fit into an 02 mustang v6 that has been v8 swapped?

        • No it would not, custom modification would be needed in order to get this driveshaft working, or any driveshaft we have to offer, due to the engine swap.

        Helpful (0)

        Hello, after replacing my stock driveshaft to SR Performance Aluminum One Piece Driveshaft, i noticed a transmission liquid leak from my transmissions main shaft seal, so i need to change the main shaft seal; my question is - will stock main shaft seal fit to this driveshaft or is there some SR performance or other special aftermarket main shaft seal to fit to this driveshaft, Thanks.

        • You would be able to use a factory style tail shaft seal with this aftermarket driveshaft.

        Helpful (0)
        Post Your Question
        9 More Questions
        Will this driveshaft be ok with a lot of mods ? I have a lot of mods I’m adding to my GT very shortly such as gears (3:73) , cams , pullies . I already have intake plenum also full exhaust.. 1 answer
        will this fit the 03 V6 1 answer
        Will it fit on a 97 4.6l Gt 5speed standard without having to change anything else? 1 answer
        Will this work for automatics if yoke is reused? 1 answer
        What driveshaft would work on my 2002 mustang gt with a t56 magnum 1 answer
        does anyone make aluminum drive shafts for auto trannys 1 answer
        I have a stock car just doing a drivetrain upgrade but accidentally bought a 31 spline is there anyway to convert it to 28 spline ? 1 answer
        Will this fit in a 2003 GT V8 automatic transmission? 1 answer
        Sorry, I'm still learning, First Mustang. Does this driveshaft ONLY work for Manual transmissions ?? It doesn't clearly say "Manual Transmission Only". 2 answers

          Customer Reviews (14) Write a Review

          Overall Rating 4.9

          out of 5 stars

          Installation Time:Less than 1 Hour

          • Performance Gain 4.307693 4.3
          • Fit 5 5

          • 5/5

            Installation Time: Less than 1 Hour

            May 24, 2018

            Very nice

            Had to break it loose with a cheater bar but took longer to lift car than to change out shaft. Shaft is very nice. Car does rev a lil lighter/quicker. Tranny will drip out a lil bit so be ready for it with a towel.


            Year: 2001 Submodel: Bullitt

            Helpful (5)

          • 5/5

            Installation Time: Less than 1 Hour

            March 22, 2018

            SR Performance Aluminum One Piece Driveshaft

            The difference is noticeable from the first second of driving, no nasty vibration and annoying sound of tired old stock driveshaft. Also car feels much-much lighter, like sport car needs to be!. (installation took about 15 minutes)


            Year: 2004 Submodel: GT

            Helpful (6)

          • 5/5

            Installation Time: Less than 1 Hour

            February 01, 2018

            Great Product

            Bolted on easily with no problem. zero wobble or balance issues. Works great!!!


            Year: 1996 Submodel: Cobra

            Helpful (6)

          • 4/5

            Installation Time: Less than 1 Hour

            November 25, 2017

            Sr aluminum driveshaft.

            Less rotating mass, lighter, less driveline vibration, smoother. What's not to like.


            Year: 2004 Submodel: Mach 1

            Helpful (8)

          • 5/5

            Installation Time: Less than 1 Hour

            June 27, 2017

            Sometimes more is better. ..

            This driveline is very nice. It was more money than the ford raceing unit, However fit perfect and fixed me vibration issues.... Sometimes you get what you pay for... Spend the extra money.. Its worth it. ..


            Year: 2004 Submodel: Mach 1

            Helpful (6)

          • 5/5

            Installation Time: Afternoon

            March 21, 2017

            Worth the $

            Had the shop put it in with my 4.10s. Looks good underneath and the weight reduction is a plus. After having this installed my drive line vibration went away


            Year: 2004 Submodel: Mach 1

            Helpful (9)

          • 5/5

            Installation Time: Less than 1 Hour

            March 01, 2017

            SR Aluminum Driveshaft

            This drive shaft went in like a dream. Old heavy(and I mean heavy) drive shaft out, SR in. WoW what a difference in drive-ability, my car seems more responsive and rpm's are quicker.


            Year: 2002 Submodel: GT

            Helpful (7)

          • 5/5

            Installation Time: Less than 1 Hour

            December 09, 2016

            Great driveshaft

            I installed this driveshaft on my 2003 mustang gt and wow! A lot smoother ride and no more vibration like I had with the stock on. Highly recommend this to anyone looking to replace your driveshaft.


            Year: 2003 Submodel: GT

            Helpful (7)

          • 5/5

            July 20, 2016

            I Underestimated the "RESULTS and BENEFITS"

            I was dead set against investing in an aluminum driveshaft but a close friend got one and the curiosity factor got the benefit thoughts rolling. I ordered it and UPS was here in 2 days. After checking the index while installing the new driveshaft I was impressed by the low indexing numbers, this shaft is pretty much perfect, no vibration, no driveline ringing from standard transmission bucking during deceleration, and the quality is the best I have seen in my 45 years in the industry and happy I chose this one over the Ford Racing driveshaft. Improvements are acceleration, no NVH issues, and a slight gain in MPG. Remove all doubt, “Get it Done”! I did and not one bit sorry.....


            Year: 1997 Submodel: GT

            Helpful (5)

          • 5/5

            Installation Time: Less than 1 Hour

            May 03, 2016

            Great product

            I had a small dent in my aluminum driveshaft with a bad vibration at higher speeds. Decided to go with the one piece design. Not only does it look great, there is absolutely no vibration any more. Love the smooth ride again. Another great product from a great place like American Muscle.


            Year: 2006 Submodel: Cobra

            Helpful (4)

          • 5/5

            Installation Time: Less than 1 Hour

            April 18, 2014


            Driveshaft is made with excellent quality and packaged nicely. Paired this with an aluminum flywheel and revs up noticeably quicker. Waiting on 4:30 install to see the real gains.


            Year: 1998 Submodel: Cobra

            Helpful (6)

          • 5/5

            Installation Time: Less than 1 Hour

            September 06, 2013

            Great product

            My 03 mach 1 definitely picks up a little better, only mod on the car so far though besides tires, currently about to install L/T headers, x-pipe, and CAI so all together will be a fairly big improvement over stock! Defiantly recommend getting this though! Thanks AM


            Year: 2003 Submodel: Mach 1 Spokane, WA, USA

            Helpful (7)

          • 5/5

            Installation Time: Less than 1 Hour

            June 21, 2013

            Looks good and light weight

            Weighing in at a svelte 13 lbs, it’s over 8 pounds lighter than the stock unit. The solid one piece shaft design is what sold me on this one. Installation was a breeze and took about 30 minutes. It does feel like the car is more responsive. I’m hoping that it will help put more HP to the wheels. We’ll see when we hit the dyno.


            Year: 2004 Submodel: Mach 1 NJ

            Helpful (7)

          • 5/5

            Installation Time: Less than 1 Hour

            March 11, 2013

            Mach 1 driveshaft

            This is a pretty piece, I could have hung it on the living room wall! It is a full 7 lbs lighter than the stocker. It slipped into place perfectly, my 4.56 gears are quieter and the throttle response is awesome. You can definitely feel the difference!


            Year: 2003 Submodel: Mach 1

            Helpful (8)

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