1994 6.5TD doesn’t sift past 2nd gear
Hello this is my first forum post but recently my 6.5 doesn’t shift past 2nd. The old girl has 302k and has been maintained to a T. It’s been in the family since 94. The fluid is still percent and there are no codes. I don’t really no were to go without a code to pull. I don’t think the trans is shot seeing as the fluid was always changed regularly and still clean no burn smell at all. Where should I start? What should I do? Thank you.