296xxxls40

Thanks in advance ill try and keep it simple i have three things i want to ask
1 only at wot it hangs at redline until i let go runs good
2 Speedometer doesnt work
3 od flashes randomly with od on
4 doesnt seem to downshift to well the car does have 296000 but runs Smith and starts right up i only paid 1000 fit the car

cobalt91

Sounds like the transmission might need work. I would start with a new filter and fluid. Have you checked for diagnostic codes for the trans?

Yamae

I suggest you to check the speed signals at the ECU. This needs to use an oscilloscope or simply use a head phone and a capacitor about 0.1uF or so in series to confirm the speed signal by ears listening the pulse wave as a audio signal. Is the speed signal coming out from the ECU?

297xxxl400

Thanks for all the help so i got some more info
Code 42 63 and 67 for the transmision and code 55 and 71 for the engine i wanted to k now if the ls is similar to the mk3 supra with the knock sensor wiring for code 55 the egr code i read that i can clean the egr and throttle body to clear code 71.for the code 42 which is supposed to be the speed sensor. and the code 63 and 67 with a solenoid kit any helpis greatly appreciated also the speedometer and the odometer doesn't work and i changed the rear speed sensor in the transmission