I have done some reading and wondering if I screwed myself. Just put in 4.88 gears and will be running about 2600 rpm at 70mph on the highway. I have a one piece aluminum driveshaft and from what I read they tend to pop around 100 mph. Should I start looking? 4l60e ECSB 4x4

 

Yep better start looking. Being 4wd an ecsb its not super long. Yet id go ahead and put a good shaft in it

 

Thanks for the reply. The driveshaft is about 66-67 u joint to ujoint