The oil gauge is not working had a new put in but that wasnt the problem.

then that probable wasnt the problem

There's a couple of things you can try. You could have a bad oil pressure sender or a bad gauge. Without spending a lot you could replace the sender unit. If the gauge is defective, it is more expensive and the new sender was a waste of money.

You could have someone put on a pressure test gauge which would be threaded into the hole from removing the oil sender. This will tell you if the oil gauge and old sensor are accurate. If the readings from the mechanics add-on gauge are still low, then you have an internal engine problem.

A mechanic will cost you to hook up a test gauge, and you still may have to buy a new sender. Probably the best thing is to do is install a new sender yourself and if it works you are done; if it does not help either go to a mechanic or replace the gauge.

An internal engine problem could be an oil pump, or bearings.

For oil not working check the help link shown below:-----

Oil Gauge and Temp Gauge Not Working?

http://howtobyme.blogspot.in/2012/05/2004-toyota-tundra-oil-gauge-and-temp.html
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Hope these helps .

The most common reason for this is the front seal of the compressor leaks, The leak is hard to track down as it is often gas and no oil or residue.

these are prone for the instrument clusters going bad if all 3 are not working and it wasnt like 1 at a time than i say the cluster has went out. i have replaced probably 6 or 7 already this year. i hope this helps

First Look under transmission for a drain plug like a Bolt size Then Open your Hood Check On the side for Oil gauge... From that Oil Gauge after draining your old Oil ...Put Back Your Bolt ..Then Find a little Funnel to put our new Oil throw that Oil Gauge.. Transmission Oil For Manual Transmission Only From Canadian Tire ...Good Luck

you should switch the temperature sensor and oil pressure sensor you had on your first engine,because your new engine must come with the light indicator dashboard so the sensor of your new engine are not compatible with your gauges....lipak!...

I would stop driving it right away and test the oil pressure with a gauge. If at an idle when its cool you don't hit 30-40 psi....change the oil pump. The knocking is probably your main bearings. While your installing a new oil pump, put new mains in.

sounds like u had a oil pump go bad

if motor ceased it junk now but with this truck only having 72000 miles on it i would put a new motor in it if you do decide to put new motor in it and plan on doing that kind of towing i highly recomend puting a oil cooler on it and high voulme oil pump if this truck has a factory oil cooler that in the radaitor i recomend u disconnect that one and put a aftermarket cooler on it if u do decide to reuse old oil cooler make sure you blow all the old oil out of cooler because it probley has **** in it from motor seizeing

could be a computer problem might need to bring it to a mechanic and have them put the code reader on it and see if any pop up