View Full Version : rear end gearing ratio's

01-19-2008, 12:18 PM
We just purchased a used truck (f150) for towing of our new 08 x2, it has the 5.4l v8 triton with 3.55 rear axle ratio. We will be taking our boat home soon in the next few months but have a question regarding towing.

Anyone tow with the 3.55 rear end before, pro's or cons? Should we tow with OD on or off?

mach 32v
01-19-2008, 12:20 PM
3.55 gear will be good for towing,tow with overdrive off..

01-19-2008, 02:23 PM
U will be fine!!!! that rear end is good!!! I agree with mach 32v i tow with overdrive off!!!

01-19-2008, 02:28 PM
I have towed my X-Star with a 4.6 F-150 with 3.73's and it worked.
3.55's with the 5.4 should work perfectly well. Though Mach would agree I have an affinity to 4.30's in 32v Ford applications.

mach 32v
01-19-2008, 02:31 PM
love the 4.30`s in my 32v mach:D

Michael Epp
01-19-2008, 03:44 PM
I pull my X-15 with 3.42 gears in an '05 Yukon...in Drive...with tow-haul mode...I don't use overdrive. Annual trips up and over the Rockies...no problems. 3.71 or 4.11 gears would be better but non-towing gas mileage is great with 3.42 gears.

01-19-2008, 04:36 PM
Had them in my 98 Cobra, and wouldn't go with anything except maby 4.88's!

01-19-2008, 04:38 PM
I had a powerstroke ford with 4.11 gear!! the old powerstroke b4 they tuned them down some. it was a 95!! man it would tow like a champ and pull a house down!!!!!

01-19-2008, 04:40 PM
My Avalanche had 3.42 and was fine to tow with, keep it out of overdrive in the hills.

01-19-2008, 10:04 PM
that's the setup in my Expedition. Tow's the boat fine...tow's the tractor fine...never tow in overdrive, gear is not designed to handle the load

03 35th Anniversary
01-19-2008, 10:23 PM
Wanna talk about bad mileage with rear end gears, I got a 05 F-350 CC Diesel Dually with 4:30 rear end. But it pulls like a champ.

01-19-2008, 10:28 PM
Thanks guys, good to hear the 3.55 will tow ok (will soon see) we'll keep the OD off when towing