Chevy Silverado transmission grinding?

[Mitch]

I have a 1996 Chevy Silverado 5.7L (350).
Recently, it has started occasionally grinding gears usually in 1st-2nd gear, but when i get up to higher speeds it doesnt happen as often.
When it happens, it stops after i let off the accelerator.

It doesnt always happen, but it is enough to make me worry. Is there anyway to diagnose anything or fix it without getting a new transmission?

 

[Rob]

First check your transmission fluid, it's probably low. If topping it off doesn't work, your probably gona need to have the transmission rebuilt. Is it a 4x4 and is it automatic or standard?