Today I was towing my 20x8 enclosed trailer (~5k LBS) using the tow haul mode. I put my foot down to pass another vehicle and the truck downshifted as it should, however the transmission wouldn't shift back up when I let off the accelerator at cruising speed. I was cruising at approx 60-65.

I tried taking it out of tow mode, still no up shift. I had to bring the vehicle to a stop and then accelerate back to cruising speed and things now seem as they should.

What could cause this and does anyone think this could be a real issue?

Thanks.

 

I take it no codes or check eng light came on. would not worry about it as long as your trans fluid level is normal range.

Could just be the road you were on?

 

Correct no codes and road was flat, no hill whatsoever.

The tranny was serviced at 30K (10k ago) and I've towed a bunch of times since without issue. I'll double check the fluid level. If it happens again or frequently, I'll bring it in.

Thanks.

 

jlalanas: I experience the same thing at times. I had my dealer check my trans fluid for any signs of degradation or if they need to change and flush the system. They tell me it's "like new, leave it alone".

There are times it seems to get stuck in 2nd or 3rd gear and I have to fight it to upshift into 5th so I can relax and go down the road. I can't explain it either but this "weirdness" seems to be normal.

 

Ive had some similar issues when it hangs in 3rd gear even going to and from a stop? also it got confused or something the other day after doing a aggressive launch it was up shifting and down shifting kinda crazy after shutting truck down and restarting it seem to straighten out....