Sounds like tranny is bad and it usualy wont show due to having all the lower gears
Is your code reader capable of reading U, C, and B codes? The speedometer doesn't get it's speed reading from the wheel sensors. It gets it from the transmission. Not shifting past 2nd gear means your transmission is in "limp in" mode. It prevents shifting to avoid further damage. I see a transmission repair shop in your future.
SOURCE: 1st and 2nd shift error on code reader in trans
Shift error codes are enabled not only if the solonoids are faulty, does your scanner show you the solonoids switching? you could have a wiring fault. It could also be the pcm not allowing the solonoids to activate. These complicated systems are very difficult to diagnose for us profesionals with all the scanners and machines we have. Find a transmission shop in your area with a system to drive the vehicle bypassing the computor system, this will determine electrical or internal trans failure. But before you do anything check your conections from the transmission to the pcm. Also all the engine conectors and earth straps.
SOURCE: Code Reader reads Shifter Solenoid Stuck or Off
The Shift solenoids are located in the transmission oil pan. I would recommend replacing both shift solenoids while you're in there. Also replace the filter and pan gasket. The shift solenoids are located towards the rear of the valvebody and will be identical to each other. They are held in place by a retaining clip which is easily removed with a small screwdriver or similar tool. Care must be taken as parts may fly out of the bore when the solenoids are removed. Hope this helps.
SOURCE: Transmission won't shift!
Does it just not shift up to 3rd or when it shifts to 3rd it is just like neutral?
SOURCE: Have a 95 GMC truck and the speedometer, odometer,
Check fuse 20 on Insturment Pannal fuse block.
Testimonial: "That's amazing I was expecting some generic answer. I checked it and it is good. I think I'm going to have to bear down and take in to the shop."
SOURCE: 98 5.7 4x4 trans shifts hard from 1st to 2nd and
This is most likely the first signs of transmission failure. There's not much you can do aside from getting it rebuilt. This should be a 700 R4 they're a pretty easy transmission to rebuild, however you want to do it sooner than later. Many of the parts can be re-used IF you don't let it go too long. I've rebuilt hundreds of these and I'm here to tell you that I'd rather not destroy 500-600 dollars worth of hard parts if I don't have to.
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