How to check if there is oil in my gearbox and where does the nut sit and what kind of oil do i use
no sir.
That is a very good question. But it is very hard to explain without the visualization of demonstration.
Seem to be on top of transaxle in rear, very hard to see & get to?
Yes
A 93 Nissan hard body uses a 5 speed automatic transmission. This gives it a good balance of fuel economy, ease of use, and effectiveness.
did you fill up with gas all the way after adding it?
No! Not recommended.
One can find reviews of the Nissan Hard Body truck online. Some of the useful websites are NICO Club, Edmunds, MSN Autos, Car Survey and Auto Anything.
hard starting or it fill like you run out of gas. it will turn but won't start.
its very hard
Tappet,i.e.,Lifters, can be found at a Nissan Dealer. They would be able to tell you the actual size.
Dollars to donuts it is 3500 pounds.