Bucking while towing!

[calebj06]

I pull a 35' horse trailer some and am having a problem with the truck bucking/surging when it hit the bottom of a gear. It actually does it worse with the tow haul on! The worst spot is between 35-40 when I'm not on it. It shifts from 3-5 I believe and then bucks like crazy. I put the sct on last night and towed hoping it would help but no luck. Anyone know the reason for this?? Is it the tranny?? Will the river city tow tune help me at all?? I have not done the delete yet because if it's tranny related I don't wanna have to put it back on to take it in. Help!!

[O2ShootTheJ]

if its doing it stock I would go ahead and take it to the dealer.

[dereku]

Dont forget to remove your intake. Some dealers will void the warranty.

[TripleE44]

Originally Posted by dereku

Dont forget to remove your intake. Some dealers will void the warranty.

I wouldn't worry too much about that.... My truck had an aftermarket intake when I bought it from the Ford dealer.... I've heard of many others not taking it off when they go back with no problem.

[dereku]

I had problems with a 6oh they refused to work on it until I took it off. Claimed it was reaching max boost too early and exceeding the maximum recommended boost.

[KTMotoRider1]

If its doing it stock id be a little worried. As a side not most surging issues are caused be rear axle wrap not the transmission.

[calebj06]

Elaborate please! I have heard the term but don't know what it means. What is the fix??

[08stroker250]

Traction bars is the fix for axle wrap.

[calebj06]

So should I take it to the dealer and have it looked at or what? What is actually happened with the axle?

[Tarheel_6.4L]

I purchased mine with the intake installed and I've have not had any problems with my warranty.