571 US GEAR install
(9 low res pics loading)
JUNE 7 2004



This 571 3rd is going into my new 1987 Runner 22RE/auto with 33" tires. Here, I'm using an old 3rd with new carrier bearings and good re-used pinion bearings.




The first step was to decide on the pinion shim..... .102" was chosen. Then set-up the Marlin machined solid collar with the correct amount of shim. 052 then 048 then 044 and finally had the right pre-load with .042" (5~10 in/lb).




Loading the 571 ring gear onto the Detroit Soft Locker obtained from Randys. As usual, blue loctite and 70 ft/lbs.




Drive side painted pattern.....shallow and favoring the heel(outside).




Press the pinion bearing off and load up with a thicker shim. Here, I'm spinning the race to make sure the dishes on the bearing separator are not contacting. I have not damaged one YET.




The camera didn't snap the pic right but this photo shows that the drive side pattern is of the proper depth using a .108" shim. I set the backlash at about .008" and tight carrier bearing pre-load. Even 571 gears can last forever....maybe even longer....IF my rules are followed.....
1-Hi-Quality gears
2-solid collar
3-good pinion pre-load
4-good carrier bearing pre-load




This is my "crank handle"....2 bolts basically welded onto a piece of scrap tubing.




"same crank handle being used to secure the yoke while doing the final calibrated nudge on the pinion nut. Blue loctite used here also....staking is not necessary.




One 571 chunk ready to go into the Runner. 430 gears are presently in the axles so the combination of 33" tires and a deep automatic overdrive allow the Runner/571 combo to handle both the highway and trails. This is an auto....so the chain driven transfer case limits the gearing options.

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