Differential Repair

The problem of removing broken differential pinion shaft lock bolts in GM and Ford integral rear ends has an easy solution. An extractor kit has been specifically designed for this purpose and is now available. It comes with everything needed, so a standard drilling and extracting procedure can be accomplished in approximately five minutes!

Often the differential pinion shaft lock bolt is found in a broken state when servicing this type of rear end. Removal of this bolt is required to perform any type of service. From axle seals to complete overhaul this bolt must be removed.

The removal of this lock bolt is essential in performing rear axle replacement, rear axle bearing replacement, rear axle seal replacement, most differential repairs, as well as all differential overhauls and rebuilding

Although many believe this lock bolt is broken at the time of attempted removal, this is not the case. What causes this breakage is the back and forth rotation of the smaller spider gears, which causes a back and forth motion of the pinion shaft. This in turn flexes or, in effect, bends this lock bolt back and forth causing it to fatigue and break.

When found in a broken state much damage and expense is incurred in the removal process. Current removal procedures include the use of hammer and punches along with torches and impact chisels (not to mention associated cursing, gnashing of teeth and the occasional beating of a parts car with the closest available tire iron!) The price of these methods range from the cost of a pinion shaft to the expense of an entire carrier plus the labor.

There is now an easier, faster, and more economical method of removal by means of an extractor kit available through Skyway Tools. This kit provides drill bit, drill guides, and extractors so the lock bolt may be removed in a five minute extraction procedure.

Manufacturer testing has shown the removal success rate to be over 90%. The instructions are easy to follow and very thorough.