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14 Bolt Gear Kits 1988 or older 5.38 Thick

WFO 14-538T-P-KIT
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14 bolt 10.5" Full Float 5.38 thick gear set, installed in a used pinion support with new pinion bearings, new pinion seal, new u-bolt yoke, and new Sierra gears. 

If you are the do-it-yourself type, there is no reason you can't set up your own gears in your 14 bolt.  Simply send in your pinion support as a core and we can send you your gears ready to go.  Your core pinion support will fit in a medium USPS flat rate box perfect.  Be sure to include your name and contact info inside the box.   If you can't wait, simply purchase this now, and send your core in later.  When we get your core, We will credit you back $60.

With a little patience and some basic wrenches, you can be on the road!  We will install new pinion bearings and a new u-bolt style 1350 yoke.  We set the pre-load to the proper setting before sending it back to you.  We also supply the needed shims, marking compound, and a new magnetic dial indicator for setting backlash!  All you will need is a spanner tool to turn the carrier spanners. 

NOTE:  If you want other gear ratios, new Carrier Bearings or Lockers they are available at an additional cost.  Just give us a call so we can add it to your order.   

We will ship the completed product back to you via UPS ground.  

Remember, you will need a 4.10 or 3.73 carrier to use the thick gears.  This will not work with a 4.56 ratio carrier!

Product Series


  • WFO 14-538T-P-KIT
  • WFO 14-538T-P-KIT
  • WFO Gear and Axle
  • New

Product Series

Shipping Information

  • Item Requires Shipping
  • 60.0 lbs.

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