|In my goal to lower my ET at the drag strip I have opted to go with some 3.73 rear end gears. The guys over at Late Model Restoration where all about helping me go faster. They shipped out a Mustang 8.8″ 3.73 Ratio Rear End Gear KitThis kit includes the hardware, rear end gears, bearings, shims, but also includes all of the software: gasket, seals, marking compound, gear oil, and the friction modifier needed to get the job done.
These components are Ford Racing’s heavy duty rear axle ring and pinion set.This is a very technical and difficult modification. I worked with the guys over at MC Racing to help me install this. So these photos and instructions are from an observation point of view. This is not a detailed installation article. Hopefully it will help to serve someone as a decision maker before you tackle this job yourself. Most likely you will want to get some professional help. This job will greatly be less complicated if you use a lift versus trying to just use jack stands.
For more information take a look at the Moser Wavetrac differential install.
|Here is the gear and Pinion just opened.|
|After getting the car in the air take off the rear wheels.|
|You will want to separate the sway-bar end links as well as the pan hard bar in order to gain clear access to the housing.|
|Then remove the rear housing cover.|
|Be sure you have your oil drain pan placed underneath.|
|Here is a clear shot with the cover off.|
|Then you can remove the main caps on each side.|
|Pull your axles out.|
|In order to pull the gears out you will also have to undo the back of the drive-shaft in order to get at the pinion gear.|
|Here is the pinion gear removed from the housing.|
|You will need to press the bearing onto the pinion gear.|
|First you will install the pinion gear.|
|The rear axle bearings will sit here.|
|Put the gears back in and torque the main caps back down.|
|Now check your wear pattern. You will paint a few teeth and then spin it around so it makes contact with the pinion gear.|
|If you are happy with the pattern then bolt the rear cover back on. If not then you have to remove the it all including pinion gear and add a shim to it.
This can be very time consuming. If its not set up just perfectly then the gears will howl.
|Then fill with gear oil.|
|Reassemble the rest.|