I’ve read that a 10 speed transmission will be used with the new 429 in the F250/350.
Is this the same unit presently used in the F150?

 

No. The F150's 10R80 is only rated for 800 ft lbs of torque. The current 6 speed in the Super Duties is the 6R140, rated to 1400 ft lbs of torque and the oddball 2017+ F250, 6.2 have the 6R100 which is rated to 1000 ft lbs of torque.

 

only 800

 

429 is 7L not 7.3L. The 7.3L is around 445ci

Nm not ft-lbs. So 800Nm = ~590ft-lbs or 1400Nm = 1032ft-lbs
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the new 10 speed for SuperDuty is similar but has much beefier parts. They are not the same at all. Hard parts are made much stronger and are larger. I am sure Ford has put the new transmission into torture testing because unlike F-150's that "may" see some heavy use, most Super Duty trucks are worked a lot harder daily. Many find their use by employees of companies and are treated like rentals when the boss is not looking. I have a lot of trucks and so far have never rebuilt a TorqueShift transmission yet or had any failures in heavy use even up to 500,000 miles and employee driven. I hope the new 10 speed is just as durable.

 

Like the above poster said, it's Nm not Ft/lbs

80 = 800nm = 590 ft/lbs
100 = 1000nm = 737 ft/lbs
140 = 1400nm = 1032 ft/lbs

 

Well lets hope it can handle more than that. The 5Star stock tests show the 6.7 Powerstroke is putting down nearly 1000 at the wheels. One run did exceed 1000.

 

The forumla for finding tq rating is last 2 digits XX (80) ÷ 2 × 10. The 10r80 is rated for 400 ftlbs

80÷2 = 40 - 40×10 = 400

 

It is measured in ftlbs, the rating is the ladt 2 numbers divided by 2 and multiplied by 10, 10r80 is rated for 400ftlbs, exactly what a stock coyote puts out

 

That post is 4 years old Shelby.