4L80 E 1st and 2nd gear only working

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Htoo

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Joined
Oct 16, 2019
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Location
YANGON Myanmar
Hi everyone,
my name is Htoo from Yangon Myanmar. May I explain my problem. I’m trying to restore 1963 Dodge D200 with 2001 LS1 Chevy Vortec 6.0 and 2000 4L80E transmission. Installed BP standalone wiring harness, 12200411 PCM .I rebuild the transmission kits (except valve body), put new solenoid A,B and pressure sensor. Changed Acdelco Speed sensors.But 1st and 2 nd gear shift only working.
The MPH indicator also shown under 20. No error code for trans too. I’ve no an idea for this matter.
Pls help me solve this issue. Thanks in advance.
 
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