just bought 94 7.3 t/d 5spd !!!! my first diesel need to know regular service interval. and where to get service manual?? not chilton to vague. also i need to know shift points. i do good in 1,2,3,but 4 keeps grinding at all rpm.

 

3000 heavy service/5000 regular service for oil/lube. If you're grinding at all RPM I would start by changing the transmission fluid.

 

thanks,johnsdiesel. i will do that tomorrow after work. after driving this diesel ,i cant bellive the power!! i have always had 460 trucks this 7.3 has it beat