Oil guage problems, please help!!!

[12 valve]

Hey there yall I have a question about my oil guage, (dash guage) I have a 93 cummins!! evey time I hit bout 60 to 85 mph goin down the road my guage hits the low point and when I slow down it gets back to normal, I was wonderin what the problem was..any sugestions!!!

 

[cumminspride]

You can get a mechanical guage from TSC just to see if it is the sending unit or not. But first thing I would do is unplug the sender adn clean the weatherpack connector VERY GOOD and plug it back in and go give it a try.