Discuss Do I need anything else for 4.10 gears? on AllFordMustangs.com, the place for Mustang enthusiasts.
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Hey there, I plan on ordering some gears for my mustang. It currently runs 3.55 gears and I plan to switch them out to the 4.10's, will I need anything else for the install? On Am they are offering instal and bearing kit, and two other options. Are these necessary? Ford Racing 4.10 Gears (05-09 GT) M-4209-G410A - Free Shipping!
You don't have to purchase any of the extras with these gears. However, if you've never replaced the bearings in your rear, now's a good time since you'll have most of it apart. I highly suggest looking into the bearing kit!
If you're over 50k, I'd change the bearings. I did gears at 3x,xxx miles so I didn't worry about it. However, you will need new posi dif oil when you do the job along with some RTV sealant for the dif cover.