JB Conversions 15-1103 User Manual
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32 Spline Front Output Shaft Upgrade
Manufactured by JB CONVERSIONS, INC.
Part No. 15-1103
Instruction Rev: 2009.09.26
Kit Components
. 32 spline front output shaft
. Tapered roller bearing #30207 (cup & cone)
. Spacer ring
. CV yoke # 2-4-5341
. 7/8" x 20 Lock nut - Chrysler #4167924
. Rubber star washer seal - Chrysler #4210973
. National oil seal #473454
IMPORTANT!
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Installation Instructions
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Phone: 337-625-2379
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PREASSEMBLY CHECK
After the Dana 300 has been disassembled, refer to the photos A & B below to verify
gear-to-shaft clearances. Place the original Dana gears (separately) onto the front
output shaft as shown. Using a gap gauge, verify clearance between the grinded
gear face and the shoulder on the shaft. Use a straight edge as shown.
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FIG: A
FIG: B
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1) Drain the oil then remove the front output yoke and inspection cover
(Fig.1).
FIG: 1
2) Remove the 5/16” retainer bolt and plate for the intermediate shaft. Using
a brass or wood drift, remove the intermediate shaft as shown (Fig.2).
FIG: 2
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3) Remove the idler gear from the case (Fig.3). Be aware of the needle
bearings and 3 retaining rings in the center bore of the idler gear. Retain or
replace during final assembly as desired.
FIG: 3
4) Using a 3/16” allen socket, remove the two shift fork set screws (Fig.4).
FIG: 4
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5) Remove the aluminum bearing housing from the case. The shift rails will
slide through the forks as the housing is removed. You may have to steady
the forks with you fingers as the rods slide out (Fig.5).
FIG: 5
6) Remove the rear bearing retainer plate and shims from the case followed
by the bearing cup (Fig.6).
FIG: 6
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