I have a nissan 300zx turbo 1986 . if you get on it hard the axles pop out of rear differential , i have replaced axles and clips but they wont stay in . i also replaced rear shocks with non adjustable. there in no movement in rear spindles that could cause this , at least that i can see!

SOURCE: rear lights stay on

on you brake pedal, there is a switch, that switch is what turns your brake lights on and off.  Must be stuck in "on" position.  This is a common problem for the brake light NOT to come on, but I suppose the reverse could also be true.  Check this switch, unplug it and see if your lights go off.  If they do the switch is to blame.  See if you can "oil" up the switch or clean it.  You would be supprise at how much dust and debris can jam those switches.

SOURCE: timing on a 1991 nissan 300zx

There is no means of setting the timing if you are referring to a conventional timing light. The engine is designed with sensors that sense the angle of the camshafts in relationship to the crankshaft and whether it is on the intake or exhaust stroke on the #1 cylinder. This design is actually a little more complex than that because it has variable valve timing which means that the angle in which the camshafts open and close the valves, change with RPM's This give the engine the best of both worlds. It's like have an engine with cams designed for torque at low RPM and a set of cams designed for HP with a free breathing quick revving engine you would have on a race course. The ECM is constantly changing the timing and injector pulse width based on many sources of input, from, the O2 sensor, air flow, air temp, coolant temp, fuel pressure, RPM's and a host of other inputs.
SO>>>>>>>>>>>> in a manner of speaking, unless you are making reference to setting up the timing chain, everything else is under control by the ECM and related components.

SOURCE: what kind of motor is in a 1986 nissan 300zx non

Hello adeg222: My name is Roger and I will help you. The motor should be a 3.0 SOHC V-6 engine. The repair manual does not refer to this engine as being a interference engine. How ever if the belt breaks and you were driving the car. The likely hood of engine damage is greatly multiplied.Also the time called for to replace the belt is 8.5 hours.
Should you need further help please just ask. Please rate the quality of the answer. This way I know if it was helpful. Thank You for using Fix Ya. Roger

SOURCE: Rear popping in 1986 300ZX

nope there is a bushing that is in the rear mount that holds the differential in place this is what it is just replace it ....its a dealer only part

SOURCE: I have a 1986 non turbo Nissan 300zx Awhile ago,

About the only thing left is the Ignition Control Module.