DSS 2015+ Mustang GT T56 Magnum XL Conv 3.5in Aluminum Driveshaft for OE Flange FDSH25-A-MAG-BILLET
Swapping a Tremec T56 Magnum XL into an S550 Mustang GT solves the MT82 problem, then hands you a new one: the factory driveshaft no longer fits. The Driveshaft Shop (DSS) 610266, part FDSH25-A-MAG-BILLET, is the one-piece 3.5 inch aluminum shaft built for exactly that swap. It runs from the Magnum's output back to the factory pinion flange on 2015-2017 Mustang GT cars that came with the manual transmission differential.
The S550 GT left the factory with an MT82 six-speed and a two-piece driveshaft. The T56 Magnum XL has a different case length and output, so the stock shaft cannot be made to fit cleanly. DSS builds this one as a single 3.5 inch aluminum tube, which removes the center support bearing and the extra joint from the driveline. The front end uses a billet piece sized for the Magnum, and the rear end uses the DSS 300M stub system mounted into a billet aluminum plate that bolts to the original rear flange. It ships with grade 12.9 hardware and backup lock nuts, because flange bolts backing out is a known way to lose a high-power driveshaft. If you are still deciding on the gearbox itself, our T56 Magnum vs TKX comparison and MT82 problems guide lay out why owners make this swap.
Measure first. With the car at ride height and the transmission mounted where it will live, measure from the Magnum's output to the pinion flange face; our driveshaft length after a transmission swap guide shows how to take that number and why ride height matters. Confirm the rear end is the factory manual-transmission differential, because DSS states this shaft only fits those. If an existing shaft is vibrating, rule out balance and joint angle problems with our driveshaft vibration guide before you blame the parts.
DSS lists FDSH25-A-MAG-BILLET for the 2015-2017 Ford Mustang GT converted to a Tremec T56 Magnum XL six-speed, with the factory manual transmission rear differential and original flange. Our listing shows it as 2015+; if your car is a 2018 or newer GT, or it has an aftermarket rear end, a solid-mount IRS conversion or a different transmission, send us the year, VIN and transmission details before ordering so we can match the right shaft. More driveline parts are in our hard parts category.
DSS requires a rear subframe (cradle) lockout kit on the car before any of its one-piece shafts go in. A cradle that moves under load changes the shaft's working length, and DSS says damage from an unreinforced cradle voids its warranty. Check the emergency brake cable bracket as well; DSS notes it may need clearance work or relocation, and contact there can damage the tube. Use the supplied 12.9 bolts and backup nuts, torque them to the DSS instruction values, and check for any rubbing through the full suspension travel. Shafts like this are commonly paired with stronger rear half shafts, such as the DSS 800HP S550 right axle or the DSS 2000HP left rear axle. If the Magnum ever needs service, the T56 5th and 6th gear puller is the tool for the teardown, and our T56 Magnum rebuild cost guide covers what that job runs. For a broader look at manual gearbox service costs, read automatic vs manual transmission repair cost.
| Brand | Driveshaft Shop |
| Part number | 610266 |
| Fits | DSS 2015+ Mustang GT T56 Magnum XL Conv 3.5in Aluminum Driveshaft for OE Flange FDSH25-A-MAG-BILLET |
| Vehicle fitment | Ford Mustang (2015) |
| Type | Driveshafts |
| Condition | New |
| Ships | Same business day (in stock), from the USA |
| Warranty | 1-year |
Doing this repair right usually means replacing these at the same time. Same transmission, ships together.
No. FDSH25-A-MAG-BILLET is built for a 2015-2017 Mustang GT that has been converted to a Tremec T56 Magnum XL. A car still running the MT82 needs a shaft made for that transmission.
DSS states it only fits cars with the factory manual transmission differential. If your car was born an automatic or has a different rear, send us the VIN and rear end details first.
Yes. DSS requires a rear subframe or cradle lockout kit before installing any of its one-piece driveshafts, and damage from an unreinforced cradle is not covered.
Yes. It is a single 3.5 inch aluminum tube that replaces the factory two-piece setup, so there is no center support bearing to wear out.
DSS notes the emergency brake cable bracket may need clearance work or relocation. Check it and the full length of the tube through suspension travel before driving.
DSS publishes this part for 2015-2017 GT cars. For a 2018 or newer car, send us the year, VIN and transmission details so we can confirm fit before you order.
