Y jeep makes a loud noise when first started in the morning. After about a min. The noise quits. Don't hear it again until it sets a while. What's making that noise?

You're going to have to be more descriptive of the noise than that... what it sounds like, its general origin, whether its pitch changes as you rev the engine, etc.

Common start up sounds include belt squealing as it slips or lifters tapping until they pump up

These Moises occur with engine running but vehicle can be at a stand still

I also have a sound that comes and goes after a start up when been setting over night. It sounds like an electric fan cutting in but we don't have an electric fan.

Yes you do, and maybe you leave it on.

If it's a squealing noise that changes pitch when you tap the gas it would probably be your belt slipping (best guess I can give you). Typically a lose belt will stop making noise after several seconds and will get noisy again once it's had a chance to "cool down." Look at your belt and see if it looks warn. If it does, replace it for sure. If not still consider replacing it, but at least tighten the belt if it's in good shape.

Read last post in 98 jeep tj crank no start

Kinda sounds similar

It has a new belt, I don't think its the belt, it was making this noise with the old belt also. There is no squealing. It sounds like a rush of air, just like an electric radiator fan and comes and goes a time or two and then goes away.

Digger I did and not following you??

Picked wrong thread sorry it was for another 97 thread with no start

Thanks, I'll check it out.

The noise sound like drive train area. Make the noise setting still and moving the same. Subsides in about 50-60 ft of moving. Maybe the torc converter area.

I think it's the torque converter. What can be done to correct it?

Yes, stops in about 45 sec

So you apparently have an automatic. Does the Jeep take off in Drive or Reverse as normal when first starting out in the morning? As in is the transmission slipping too in addition to that noise you're hearing?

Have you properly checked its ATF level? By properly I mean the engine and transmission must be warmed up and running, and the transmission must be in Neutral when checking the ATF level. Again the engine must be running, warmed up, and the transmission must be in Neutral... not Park.

Jeep takes of good, no slip, shifts good. Only noise and it quiets fast. I'm thinking flex plate, ATF is good, no leaks.

Properly checked ATF with engine warm, after driving awhile and in neutral.