Transmission issue shifting beyond 4th gear

Hello all! I've read quite a bit on here about others issues with the transmission not shifting beyond 4th, but I'm not sure anyone has posted the exact issue as me. I've replaced the shift solenoid twice now. I believe it's Solenoid D or S4. It seemed to work temporarily and wasn't a long term fix. I'm wondering if the problem lies somewhere else in transmission. I've others replaced the pressure solenoids. Both B and D at the same time and it worked. Is there another obvious fix I'm missing here?
It occasionally resets when I turn the truck on and off, but it can take 3 or 4 cycles while I'm coasting in neutral and it's getting old! I have 308,000 miles on it and dont want to get rid of her yet just because of the transmission.

Thanks in advance!

 

I’m having the same issue intermittently on my ‘07 SR5 TRD. Do you have the part number of the solenoid(s) you’ve replaced?
When mine doesn’t want to shift to 5th I flip the shifter to manual then back to drive and it shifts up.

 

Out of curiosity what codes are you getting?? Juat because you get a performance D code, doesn't mean the solenoid is bad.

What I'm assuming, since I'm not seeing any drain and fill attempts besides the dropping of the pan for solenoid changes, the real issue is the fluid is gone meaning dirty/burned.
I've been down this road and still get the same code for performance D stuck off and transmission component slipping which will trigger the lock out of 5th and 6th. I no longer get locked out, because I'm actively maintaining the fluid drain and fill

The codes will clear if you do 3 or 4 cycles meaning on/off it wont read the code because the gears are not actively slipping so it's detecting good movement.

I do have a couple threads linked to each other. 1 is P0894 don't remember the other one, but they're linked