My 3 ended up being over 4.
Boot ripped right off first time off road.

Anyone suggest a good replacement shaft?

 

it's an auto

 

well, then depending on lift height, you might need one for the front.

I put on a 3" Teraflex kit on the 15th/16th (got a little over 4" as well) and i have new Coast shafts sitting on my workbench waiting to go on tomorrow morning. I chose to replace mine before i have an issue. (2dr. Automatic)

I am no driveshaft expert so i listened to everyone and asked a zillion questions, it was a toss between Coast & Woods for me. I called David at Northridge, he had the Coast's there ready to go, so that is what i have.