Question about 1988 Nissan King Cab
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Posted on Jan 02, 2017
SOURCE: Nissan 3.0 Hardbody Turbo Diesel
Your description sounds like a waste-gate problem.
These are intended to prevent overpressure from the turbo and yours might be faulty.
The oil leaks may not be related to the other problem - Jeez, would love to own some vehicle that never leaks oil from somewhere.
Posted on Jul 09, 2008
Injt: From your description, it sounds serious. If you are describing a Nissan 5 speed transmission, here would be my best guess as to what has occurred. Prior to near total self destruction, these symptoms will show up when counter gear bearings have failed.
At first the transmission will just seem a little noisy, but you probably might not notice that the noise is not present in 4th.
As the bearings deteriorates, the countergear will slowly start dropping and the gears will no longer be running properly aligned.
The noise at that point would be quite obvious. You would hear it in all gears but 4th. With the car at a standstill in neutral with it running and the clutch pedal released to where the transmission is turning, it would sound like a bucket of rocks loose, rattling in the tunnel area of the car. When you depress the clutch in, the noise would disappear. The reason you could run it in 4th is because it is the only gear in which the input shaft and output shaft are locked solid with no relationship to the counter gear. The truck/car can be driven in 4th for this reason. (It doesn't need the counter gear)
Reverse gear is a large gear located at the very center of the transmission next to the Steel center section which you would see sandwiched between the front casing and the tail housing. It is not much more than 1"" thick. Because Reverse is right at that location, even though it does need the counter gear to transfer power, it is the only gear in the transmission which is "SPUR" cut and not helical cut. This design gives it a distinct advantage to operate in a misaligned state with greater spacing. It will still make quite a racket in reverse, but it will move. I am 99% sure that this is your problem. Should this be the case, the transmission has been run far too long to consider repairing. It would probably be scrap metal inside. Find a used one or get a re manufactured one.
I have found that the synthetic gear oils have worked well in our Nissan 300Z race cars we use for road racing. They have basically the same transmission. I am partial to Amsoil and Redline. Both have performed beyond expectations on the track.
I hope I have answered you question.
Posted on Mar 26, 2009
Inadequate fuel pressure, change the fuel filter first, make sure the car sits for at least two hours before replacing the fuel filter because these fuel lines are under high pressure during the time of operation. The pressure usually decreases over time in the lines but wear safety glasses just the same, I would recomend depressurizing the fuel system first, buy a Haynes repair manual for detailed procedure to be safe. If problem persists go to Auto Zone and ask them to check for trouble codes these codes if present may instuct you in detail to replace the MAF sensor or give you a code that must be looked up to find the problem.
Posted on Jul 22, 2009
You could have a bad valvebody in your transmission or a bad pump in your transmission or your clutches are bad. In any case you have a bad transmission. Please rate my answer.
Posted on Nov 17, 2009
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