you need to add a small bottle of differential additive, GM part, your Isuzu
department will know the part
it's a sticky thick oil type limited slip diff additive.
post back on ng if you can't locate it
Motorsforum.com 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.