from what i have heard, the speedo ring can become damaged while trying ot remove it - just like that 6th gear. as stated above, i purchased a second hand lsd that appeared to include a speedo drive. Hopefully between that one, and the one in my car i have one thats usable. on the other hand, i have been quoted $700 to remove and replace the box, would really hate to pay that twice if a $200 speedo ring fks up ! fun times!