2002 ranger 3.0 vulcan with 90k miles has been running sluggish, mostly on highway. Just no power. I am original owner and I know this is no rocket, but somethings wrong. No codes, new plugs and wires at 50k. Never changed fuel filter yet.

Repair Shop--- you installed too many parts already,
on a guess with no testing

the fan will turn on when the engine temp reaches a set temperature and will only turn off when the engine drops below a certain temp and on the highway running hard it may stay on longer

First of all I would investigate further. How did they determine bad cylinder? I've seen that cured with a simple can of combustion chamber cleaner run through it. Let me ask. Does vehicle get lots of highway driving ? ( that helps keep combustion chamber clean ) If you can provide me with a few more details such as driving habits, mileage on engine, what engine you have, how often it gets service and tune-ups etc, I can help you dig a little deeper before writing that engine off. My guess is it's simpler than what you were told but lets check a few things just to be sure.

if it 4l60e it shift on it on the computer control it to shift the trans is bad slipping or not shifting

Who ask you this much for 72k ????????????
In your owner manual should be service schedule or separate booklet with it.
And 72k miles or km ??????? And were are you at?
Most expensive service is 90k miles - around $1800 but you are not there yet , neither with miles or km.

I don't have a solution but here's a couple of thoughts.

1. What were the problems that caused the tranny to be rebuilt at 36900? Were those problems similar to what you are experiencing now?
2. Did they rebuild your transmission or drop in another rebuilt one?
3. If you are still under warranty (I don't know when it was rebuilt), I would hustle back there and complain. In fact I'd do that even if it's not under warranty.

Good luck!

HI- Most manufacturers reccomend replacement at 90k, 180k, etc. Variables include other parts that may need replacing during these belt changes. Water pumps and timing belts should be purchased from the DEALERSHIP, regardless of who does work. This is proper, normal cost of maintaining your sequoia. Complete inspections and labor should be completed by mechanic familiar w/Toyota vehicles. Parts may run 150-250$. Labor depends on who ya know.- Hope this helps- Thanks- ED

hate to say it but your tranny is shot..this is a common transmission,check your local junk yard for a good used one..

Hello hecri, my name is JShreader. Thank You for asking your question here at fixya.com

Below is the Maintenance Schedule for 82k-90k. It is the 90k Schedule you need to be more concerned about (granted the maintenance has been kept up by you or previous owners).

This Engine is Chain Driven, so there is no need to worry about a Timing Belt. Timing Chains are designed to last the life of the Engine. As well as the listed items, personally on the 90k visit, I would go ahead check the Ball Joints and Suspension Components. These tend to wear around the 90-95k mile mark.
I hope this helps you. If you have any more questions please don't hesitate to ask. Thanks, JShreader!

It really depends on the type of driving you do most of. Highway miles very little wear, mostly city driving alot of wear.
Rule of thumb is usually front around 30,000 and rear around 50,000.