Sermo27 75 Report post Posted November 23, 2022 Hi there guys haven’t been on here in a long time. I’m taking out the 7.25 diff my car had when I got it to put in an 8” that I just put together with a Detroit Locker and 3.40 gears. My question is will I have to cut the drive shaft or get a new one? Anyone have any info or advice. Quote Share this post Link to post Share on other sites
RPM 1,190 Report post Posted November 23, 2022 You'll need to check its fit with your driveshaft once the rear end in installed. At the very least you'll probably need a combo U joint, as I think the 7.25 rear has 1 inch cups and the 8 inch has 1-1/16 inch. Good chance I'm wrong though. Quote Share this post Link to post Share on other sites
