Turns the output shaft spanner nut on 2011-up Ford 6R140 TorqShift transmissions with a 1/2 inch breaker bar. Replaces T-1260 and T-1260AC.
If you are pulling apart a 2011 or newer Ford Super Duty TorqShift 6-speed and you have reached the big slotted nut on the output shaft, this is the tool you need. The 6R140 output shaft spanner nut tool takes the place of Ford service tools T-1260 and T-1260AC, and it is built for F-250, F-350, F-450 and F-550 trucks behind the 6.7L Power Stroke or the gas V8, plus the F-53 and F-59 chassis. Shops and home rebuilders usually go looking for it after a punch-and-hammer attempt has already started to mushroom the nut.
Ford put the 6R140 into the Super Duty for the 2011 model year as the replacement for the 5R110W. It is a heavy unit, roughly 345 pounds dry per Ford's own spec sheet, with a Lepelletier powerflow that uses one simple planetary up front and a Ravigneaux gearset behind it. Everything at the back of that geartrain is held together on the output shaft by a large castellated spanner nut that Ford installs with thread locker and torques to 148 ft-lbs. No socket in a normal toolbox engages those slots.
This tool slides over the output shaft and its lugs drop into the nut slots. The 8.375 inch body gives enough reach to clear the end of the shaft, so the tool sits flat against the nut and the load goes straight into the slots instead of levering the tool off at an angle. The back takes a 1/2 inch square drive, so you can break the nut loose with a breaker bar and later torque it with a click wrench.
Not every 6R140 repair goes this deep. Pan, filter, solenoid and valve body work all happen from underneath with the output shaft untouched. You reach the spanner nut during a full teardown or when the complaint lives at the back of the unit: a clunk or grind that changes with road speed, a reverse problem traced to the rear clutch and gearset, or a leak at the rear of the case. Before you commit to a teardown, read our 6R140 whine and clunk diagnosis guide and the 6R140 no-reverse guide so you know whether the fault is really behind that nut.
This tool is listed for Ford 6R140 TorqShift transmissions from 2011 on, gas and diesel. It is not a 5R110W tool; the earlier five-speed used a different output nut socket, so if your truck is a 2003-2010 Super Duty with the 6.0L or 6.4L, it has the 5R110W and you should shop the 5R110W parts instead. If you are not sure which unit you have, the 6R140 identification guide walks through the tag and case differences. All of our TorqShift 6-speed parts are on the 6R140 collection page. The nut itself is not included; this is the driving tool only.
A spanner like this pays for itself the first time it saves a nut, and it turns the output shaft from the step everyone dreads into a ten-minute job.
| Fits | Ford 6R140 TorqShift, 2011 and newer, gas and diesel |
| Replaces | Ford service tools T-1260 and T-1260AC |
| Drive | 1/2 inch square drive, breaker bar or torque wrench |
| Length | 8.375 in |
| Material | Reinforced steel |
| Install torque | 148 ft-lbs (200 Nm) with fresh thread locker |
| Use | Hand tools only, no impact wrenches. Nut not included |
Yes. It is made as a direct replacement for both Ford service tools and engages the same slotted output shaft nut on the 6R140.
No. It is listed for 2011 and newer 6R140 units only. The 2003-2010 5R110W uses a different output nut socket.
No. This is the driving tool only. If your nut is already damaged from a punch, source a new nut before reassembly.
148 ft-lbs (200 Nm) with fresh thread locker on clean threads, tightened by hand with a 1/2 inch drive torque wrench.
No. Use a breaker bar after heating the nut to release the thread locker. Impact shock is what cracks spanner tools and rounds the nut slots.
Mercon LV. Ford lists roughly 16.2 quarts dry for diesel trucks and 17.2 quarts for gas trucks; check the level hot after refill.
