Seiko Automatic Transmission

ALDRED20

MEMBER
2004 ISUZU NPR
300 MILES

Truck wont take off in drive (D). Only In first (1) once the truck takes off in first and I shift to 2nd or (D) it runs perfect with no problems or noises.

when I get to a complete stop I have to repeat that process again!

I have checked the fluid level and its good, I also changed the transmission filters the one inside and out. When changed the inside filter I checked for broken pieces or any that could cause the problem but the fluid was clean, dirty but clean.

and I also notice that the (D) light on the dashboard doesn't turn on when its in drive. All of the others do.

would the valve body or solenoids cause this problem? Or any other transmission sensor?

can you please help? Thank you!

3 Replies

HMAC300

MECHANIC
48,601 POSTS

Have a trans guy scan for codes, you said fluid was dirty if it was black or dak brown something burned up in trans.

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Friday, May 3rd, 2013 AT 12:11 PM

EMGN8ION

MEMBER
1 POST

Cause: likely blown trans. fuse. (can be other power or failed Tcm problems) Isuzu truck strong and GM hide the fuse: remove glove box and look to the left, wrapped up in harness are two fuses. one is for the transmission Tcm power. you may notice that the o/d cancel light and trans lights do not work without power.

Here is a guide to help you

https://www.2carpros.com/articles/how-to-use-a-test-light-circuit-tester