I have 07 ram with the hemi and 50,000 trouble free miles until now. I was checking all the fluids and noticed a leak where the driveshaft connects to the rear diff. Dont know what this seal is called. (pinion seal I think). I dont know the size of the rear diff, parts stores say it can be (10 1/2, 9 1/4, or 8). There is no tag on the diff housing. Called dodge with my VIN and they say I have 3.55 gears with ant-spin. I thought 3.55 gears did not have anti-spin. They also say that they are 75% sure it is a 9 1/4 rear end. Any answers out there. I want to change this seal myself, is it a fairly easy job. Window sticker only says customer preferred package 26G with anti-spin diff rear axle. The truck is a 4x4.

 

Also, is anti-spin and limited slip the same thing?

 

Anti-spin is same as LSD. It is more than likely the 91/4. The 8 is for the smaller trucks and SUV's like the Liberty. I believe the seal replacement is not to hard of a job, but require special seal removal and install tools to do it right. The link shows replacement of a jeep pinion seal but you will get the idea.

http://www.madxj.com/MADXJ/technical...inionSeals.htm