Isuzu NPR

Hi All,
I have a GMC 4000 (Isuzu NPR) with auto trans and 4 cyl. Diesel.
When it shifts, it seems to miss the second gear.
Any help with this would be great.
Dave G
Add pictures here
<% if( /^image/.test(type) ){ %>
<% } %>
Add image file
Upload is a website by car enthusiasts for car enthusiasts. It is not affiliated with any of the car or spare part manufacturers or car dealers discussed here. All logos and trade names are the property of their respective owners.