Need help breaking down on road trip

[gore666]

My 2006 z71 has 141k were on vacation and currently at rosewell Nm. the Tahoe started to "buck" kinda like if its running out of gas but very fast takes less then a second for it to do it and stop. at first it was only on bigger bumps but it started doing it all the time. Most of the time it does this at cruising speed once it did it at about ten mph and it sounded like a really solid and hard hit. Hard enough to shake the hole truck. I stopped and checked it out. With the truck in park I opened the hood and pushed the truck back to see if there was movement in the motor mounts or the u joints giving out acted fine until I pulled it forward and it just started rolling as if it was in Neutral. I let it rolled a few feet then stopped it looked around and seen nothing else wrong decided to drive it more and it acted ok until the last ten miles of the 60 mile drive. It started bucking even harder and started falling out of gear. The gear selector still said drive but it just reved I put it in 4x4 high and slammed in and started back in gear. So I'm at a hotel for the night and I have 12 more hours to go. What do guys think? Tranny fluid smells burned. And I have no tools with me and the wife and three kids

 

[BRUTUS_T_HOG]

Are the plugs and wires original? An ignition misfire is the most likely cause of bucking under load.

If you can get it to act up enough the check engine light will come on, setting a code that will tell you which cylinder is missing. It could be as simple as a burnt spot on the plug wire or a bad ignition coil.

Also......no tools? Fix that

 

[2Canoes]

Were you pulling a trailer?

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[Goodinblack]

Tyranny fluid smells burnt = bad sign

 

[gore666]

No trailer I changed the plugs wires and air filter at the last oil change. Yeah the no tools part sucks needed room for two weeks of luggage for five people

 

[yates ™]

I am pretty sure it is a transmission issue as the fluid smells burnt and you said you could move it while still in park. Sounds like tranny needs rebuilt or replaced.

 

[2Canoes]

Had an old Chevy do what you described once. I thought the trans was screwed. Tried it next day after it had cooled off and it never did it again. I was running it hard. That's why I asked about trailer. Sounds like it was loaded down though.

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[gore666]

Yeah we do have it loaded and it ran 80mph most of the day ill try it Slower today and see how she acts. Just has to make it home. Buying a new denali next week

---------- Post added at 09:17 AM ---------- Previous post was at 08:25 AM ----------

The check engine light is on but I can't see what it is due to a cheap ass phone charger falling apart in a cig lighter. It melted a bunch of wires great....

 

[imi4tth3w]

damn sounds like she is on her last leg. good luck making it home my friend.

almost exact similar situation happened to my parents back in 2000 with their obs suburban. ransmission broke down on the way home on a road trip. stayed in a town that just so happened to have the exact tahoe my mom had been looking at. which is currently the tahoe i own today.

 

[gore666]

We're making it down the road. I have to keep it in 4x4 so it will move gunna drive till dark then get another room don't want to break down at night