sha4000

The marks on the belt are only supposed to line up with the marks on the pulleys when you first put it on. Once you turn the engine the marks will no longer line up and they are not supposed. You most likely had it installed correctly the first time. I say most likely because I don't know if you lined the engine up at 50º TDC (Top Dead Center) when you removed the belt and if the engine stayed in that position during your rebuild.

I'm pretty sure that there should be some trouble codes associated with this behavior. Get the codes read and check back with us.

It will most def be louder. It is a matter of what you are willing to tolerate.

Any cheap ATF fluid will do. No need to overthink this one.

I'm pretty sure it's more complicated.

You still have lots of old coolant in the engine block. In order to get it all out you will need to remove the engine drain plugs. https://www.clublexus.com/forums/gx-2nd-gen-2010-present/884009-coolant-flush-fluids-questions-comments.html

Those offsets are not really the determining factor so they won't necessarily make the wheels poke out. You have to determine if the the wheels are low, medium or high disk which will then determine if they will even clear the front brake calipers.

What trouble codes are you getting from the car? Have you actually plugged a diagnostic trouble codes reader into the car? If so, what are the codes? You say you changed the ECM, are you talking about the computer that basically controls all the systems in the car? We need a little more info on what is ACTUALLY happening with the car. Does the car start and then die after a while? Or is it just that the battery won't charge?

Your car had a lot of potential high dollar issues that need attention. If you can diy those issues I might say stick with it but for the money you might have to spend I say get rid of it and find another reliable car that you don't have to constantly worry about. AC might be your biggest issue. Definitely don't drive with fuel leaking. Shops will have a field day after diagnosing all the problems. It's ok to stick with the devil you know as long as the repair is reasonable. There comes a time when you just have to move on though.

No problem, when you get a car and if you have any questions or issues just come back here and we will try to help you out.

This is not the forum to buy or sell cars. I suggest you search through the vast resources that sites like Edmund, Kelly blue book, cargurus, craigslist and Facebook marketplace have to offer to find a good deal.

Did you check the washer fluid? It could also be a bad door switch or seatbelt chime.

A transmission shop will always want to rebuild them. Unless you have some diagnostic skills your at their mercy. At least make sure they replace the rear main seal and take them pan off to check the filter as well as the fluid in the used JDM unit.

Do all other seat functions work?

I've checked my bushings while back there and they seem to be ok. The rear doesn't do as much work as the front so I guess they last longer and by the time they need to be addressed most ppl have moved on from the car.