Took my first camping with 2012 King Ranch F350 and 37 feet Challenger 12k fifth wheel trailer over the weekend.

I noticed there is lot of transmission slips in first gear. Once it enters 2nd gear, no more slips.

My previous Chev 2008 2500HD diesel didn't slip much with same trailer.

Is this normal for this F350? My rear ratio is 3.55. No slips without hauling.

Maybe I need to ask dealer to check 1st gear towing?

 

Anyone feeling lots of slips in first gear while towing fiver?

 

I would post down in the 6.7l forum. Are you sure the "slip" you described isn't from the torque converter being unlocked? I know Fords shift and tq lockup strategies are sluggish.

 

Just posted this in 6.7L forum. Thanks.

Not sure what you meant torque converter? It's only in first gear.

Will see what 6.7L forum says.

Norman