So I had a problem with my speedometer. The part inside the trans slipped off. So we took the whole engine and trans out, took the trans apart, fixed the speedometer part. Upon putting it back in everything was smooth. Started it up and it had all its gears but its hard to shift into 1st, 3rd, and 5th. It engages into all its gears but it's hard to shift. Starting to think its the cables. Took it down the street and all lights started to dim and radio would keep cutting out and reset itself and RPM and Speedometer needles started to fluctuate rapidly. If it's coasting in Neutral it idles at 2000 when it's at operating temperature. Hooked up the code reader and no codes. All hoses and wires are properly hooked up. Im thinking alternator cause it might not be sending enough power to the idle sensors. Any help is extremely appreciated.