If the 97 Jimmy is left sitting for a few hours and I go start it, 1st gear is really loud, like the engine is reving high. After it shifts, the loudness goes away. Is this normal for cold tranmissions?
Also, When I make turns, I hear a sound like water shifting from side to side in the dash. I think it has to do with the a/c but dont know what it is. Any ideas?

 

The water sound is because you have air in your cooling system. A quick search will tell you how to get rid of the air. To prevent it in the future, if you haven't already, get rid of the factory radiator cap and get a Standt.

As far as the high engine revs, could be high idle at start up to get the engine up to temp. Hopefully someone who knows a little more than me will chime in here on this one.

 

The loudness in 1st gear could be the fan being engaged. Is it a loud suction sound almost...kind of a roar? Once you get up to speed (shift gears would also be neccessary) the air moves fast enough over the radiator to not need the fan to keep it cool..

As for the sloshing sound....you probably have an air pocket in your coolant system. Park with the front passenger side of the vehicle elevated and open the radiator caps (once the engine is cold!) and vent out the air and refill the system.

 

yes, you described the noise good. Is it something to worry about or do all of these things do it?
I planned to flush the radiator this weekend anyway, will this do the trick for the water noise.

 

If you flush that should eliminate the heater core slosh. Does the 1st gear sound only happen say like every 15 starts or so. I have a noise that reminds me of a truck in low range taking off for a couple seconds taking off like every 15-25th start, but this is probably different since I think its due to my AWD transfer case.

 

Yeah, it doesnt happen often, I just figured it was a cold start. It almost feels like its in 4lo, the engine isnt bogged down, but it makes that lowed noise like the rpm's are reving high in 1st.

 

My engine used to rev high like that, especially after idleing in a parking lot for a while, or after being parked while hot. Turned out to be my TPS.

 

How much did that fix cost you?

 

about 10 minutes and the cost of the part.
I dont remember the cost fo the part. I think it was like $70 or so.

 

not to piggyback but what is the TPS?