2011 up F250 trutrac ?
- Thread starter co04cobra
- Start date
Randy_270
New member
Are you asking about the front axle or rear?
TD-5
Member
Apparently the 2011 & up Sterling rear diff was upgraded to 37 spline axles, the Dana super 60 front is still 35 spline.
Randy_270
New member
I would assume the 2011 F250s have the 37 spline because they were available with the same e-locker that came in the srw F350s. On a Truetrac note, I know TrickTruck replaced his e-locker with a Truetrac and said he likes it better. What 2011 F250 came with an open carrier? I thought all srw's had e-lockers??
TD-5
Member
"I still only call the "super" dana 60s the ones in the 05 up F-450s and 550s."
Agreed, Technically around 2002-2003 the true Super 60 housings started showing up & came with 4.30 & lower gearing, had the bigger shafts & 1550 joints & the larger 10" crown gear. That was basically only the F-450,F-550, unless it was a special order...so I'm told.
4.10 & down differentials had the bigger Super 60 housing, but with standard Dana 60 9.75" crown gear & & the smaller axle shafts. Now that being said, I just did & R&P change on my 2010 F350 & the OEM gearing was 2 cut machined & the Crown gear was 9.875" in diameter.
Agreed, Technically around 2002-2003 the true Super 60 housings started showing up & came with 4.30 & lower gearing, had the bigger shafts & 1550 joints & the larger 10" crown gear. That was basically only the F-450,F-550, unless it was a special order...so I'm told.
4.10 & down differentials had the bigger Super 60 housing, but with standard Dana 60 9.75" crown gear & & the smaller axle shafts. Now that being said, I just did & R&P change on my 2010 F350 & the OEM gearing was 2 cut machined & the Crown gear was 9.875" in diameter.
I think the locker dictates the spline count but I'm unsure. I have also heard that 10000 gvwr f350 and f250 have 35 spline while the 11600 have the 37s. I haven't had either apart so I don't know
I'm pretty sure big r found out that the ring gears a different from the 08 models so maybe he's got more info
I'm pretty sure big r found out that the ring gears a different from the 08 models so maybe he's got more info
TD-5
Member
TD-5
Member
Another change for the 2011 & up Sterling differentials was an increase in pinion splines to 37 from 31 on the earlier pinions.
Update: The trutrac worked fine and the spline count was still 35.
Truck was 12 F-250, 6.2 gas and 2wd from the factory with a open rear. We converted it to 4wd and the buyer also wanted some type of posi or LS unit installed.
Truck was 12 F-250, 6.2 gas and 2wd from the factory with a open rear. We converted it to 4wd and the buyer also wanted some type of posi or LS unit installed.
