Hi.

Yesterday morning, I got in the truck and started it up. When I shifted into reverse (automatic trans), I heard some clicking, sounded almost like the CD changer beneath the seat, but was definitely coming from vicinity of T-case shifter or shift lever. Truck didn't want to move at first, then it went into gear. I also noticed a really strange liquid sloshing sound from the same area. I drove carefully for a few miles and the sounds went away.

I should point out that I had all major service for high milage vehicles performed just 1500 miles ago, including transmission fluid and filter, coolant, transfer case, differentials, brakes. Has run flawlessly except for this issue.

Any ideas?

DRW

 

Is it possible the AT was not completely filled? With the AT warmed up EDIT: & the engine running, carefully remove the FILL plug, the fluid should drip out. If not, you are low. A good place to start.

 

I've had that same CD changer sound before. I started a thread about it and some people suggested it was the front drive shaft. Had it rebuilt and I haven't heard the sound since. However the draft shaft looked fine before it was rebuilt so I'm not sure if that's what it was or not.

I think it could also be a solenoid or something underneath there.

 

Do yourself a huge favor and check the front prop shaft.

 

Thanks for the comments. I started it up a little earlier and no CD changer noises, but the liquid gurgling/sloshing sound (almost a boiling sound) was very pronounced until the engine warmed up. Coolant expansion tank level normal. It's never made this noise before. The noise gets louder when revving the engine. Drove fine (max engine temp 206.4 through ODB scanner).

 

Check the fluid level in the transmission.

 

Level in reservoir is ok. Read on some other threads that air in coolant system can cause some "waterfall" noises. Coolant reservoir looks good too - was flushed and filled last month / 1500 miles ago with no noise to date...

 

You are not listening, check the TRANSMISSION FLUID LEVEL.

 

My reply was perhaps ambiguous. The reservoir level I was referring to was for the transmission. I then switched gears (pardon the pun) and turned to the coolant level. Like I said, looks like there are some threads describing this noise that are associated with air in the cooling system. If the COOLANT reservoir level gets low, does it draw air into the system?

 

Switch on the heat and set to HIGH? Does it blow hot air? If not it could be a sign that you have air in the coolant lines and you need to bleed the system.