I would first remove both of them and clean them up with an electronic specific cleaner. I am going back to standards and I will not look back until I get to be too old to lift my leg to clutch. The transmission is based heavily off the which was a heavy duty three speed automatic. Let me know what type of transmission it is and I'll ask my friend he's a real mechanic. The origional C6 only lasted 65,000 miles but the factory replacement is still good after another 100,000 miles but the 460 only went to 160,000 miles.
Dax, You will be the driver so install a manual if you want. All the 4x4 magazines bragged it up as the be all and end all and for what it cost it should be. And I lost track of the hundreds of times I've tried to shift into sixth gear. So the Mazda tranny was small engine F150 only. I know that there are those that will say that some automatics can be bulletproof or whatever, but I personally don't believe that way.
I should have held out for a standard when I bought this truck, now I will. The torque converter is unlocking. Good thing stuff got better with time eh? We never used to have manual transmission problems in pickups. Rapid wear of rings and cylinder walls, which can be caused by buildup in the grooves behind piston rings. I would at least call someone at Brian's and talk to them. Also i suggest you to refer these gear shift issues, which are mostly noticed.
Only trouble with xmission was with speed and other sensors. Input shaft bearing failure seems like the predominent problem. I always heard they were very troublesome. The problem here is the intermediate clutch pack is starting to fail. In this case the converter will need to be replaced. The 3-4 shift solenoid is switched on when vehicle speed increases and requires a third to fourth gear upshift. They are just a quick away from helping you out.
Change the damned oil in them and run a cooler. Also i suggest you to refer these gear shift issues,which are mostly noticed. Engine went bad from sitting for 10 years. Sounds like the 3500 isn't a truck transmission either. I drive big trucks all day long and get sooo fed up with shifting.
There are many other possibilities. The 3-4 shift solenoid activates the 3-4 shift valve which controls the automatic shifting between third and fourth gear. In 95 or 96 they went to a S 547 behind a diesel. But that is rare,if these problem is suddenly occurred without any previous problem. I learned how to drive in a 64 F100 with a Borg Warner 4 speed, then drove Hondas with 5 speeds for the next 10 years, then drove a Toyota with a 5 speed.
Car is stuck in park and the shift will not move? They used a light weight Mazda 5 speed on the smaller engines. I have been told by some sources that the F150, 250 and 350 with the 351 all used the same 5 speed, I have been told by some that the 150 and 250 were the same and the one in the 350 was different, which makes more sense to me. Today's engines are producing more torque with the new electronics and the mixer box is the weak link. But it's a really common problem. I seem to remember it's bolted onto the frt of the trans housing but I've never really seen one to be sure.
I have been in traffis jams where you inch along for miles. This is just my opinion,,take is for what it is. Nissan Sentra stuck in park? They can also totally control the output from the engine using a computerized automatic xmission. The shifter assembly is got misaligned, it has to be open and realign. To troubleshoot these issue,i suggest you to refer the solved helplinks with appropriate solutions. You could motor along pretty quick with them.