01 Yukon Transmission Problem Come and Goes Without warning my transmission stopped working. I drove a few miles to the gas station without any problems. After filling up, I went to drive away and it would not move. Tried all R D 3 2 1 and engine revs freely. I pushed it to the side of the gas station, it wouldn't roll unless it was in neutral. I had turned it off, but I thought I would turn it back on and try one more time and listen for noises. And it worked, no problem, all gears! So I headed back home. I make it about 1/4 mile down the road and it seemed to go back in to neutral? Engine revs freely in all gears. So since turning it on and off worked before I tried it again, and it worked again! 1/4 mile... revs... turn on/off... works... repeat about 10 times and I make it home. 1. Why would turning it on and off make it work... even briefly?? 2. Should I have the transmission rebuilt or start somewhere else??

SOURCE: While driving engine shuts off

I had the same issue with another GM and never got it resolved except by replacing the battery.
Finally put it one that keeps good voltage while park or running.
Wall mart sells a $20 alternator and battery checking device you plug into a power socket.
Its digital read out is better for my eyes than the dash board one and has idiot color codes red yellow and green,

Some batteries seem to get shorted cells and that lower voltage can lead to engine shutdown even while driving. You would think a good alternator would keep the engine running but these new low rpm designs with heavy load...

This is all experience and I do not claim to be a GM tech.

SOURCE: 1998 Yukon high idle sound with bad gas mileage.

What you have is the torque converter clutch,cycling on and off.
When it is off.your rpm will go up and your milage will go down
First-check to see if your brake switch, on the back of the brake peddle, is loose or misadjusted. When you apply the brakes,the first thing to happen, is that you unlock the converter,so your trans is not connected directly to the motor,or you would stall. Then below 42 MPH,your trans is working off the converter, as a pressure multiplier ,based on rpm
Second- switch okey. You remove trans pan and change TCC Solenoid.

Let me know if if you need more guidance

Testimonial: "Thank you for the quick response. Figured it to be something with the trans. Gives me a good place to start and a good reason to clean out the other stall in my garage to work on it. Thanks again!!"

SOURCE: My jimmy won't shift into high gear or reverse, it

Does it also hold first gear longer that it should and then shift right from 1st to 3rd? It sounds like you broke the sun shell in the transmission. The trans will need to replaced or rebuilt.

SOURCE: 3 days ago, i went

I ran into the problem and it was corrosion on the battery terminals. on the inside against the battery. also check the the terminals for good connection.
Stay warm

honeymokey

• 3113 Answers
• Posted on Mar 30, 2011

SOURCE: Have 1997 GMC Z71 EXSTENDACAB/WITH

I would get a used transmission with a warranty.