DIVERSIFIED MACHINE INC. 2020 PRODUCT GUIDE
XR2-4.12
Bulldog XR-2
4.12 Complete Rear
78lbs.
The Bulldog XR-2 was introduced for the 2009 Season. The XR-2 uses the same
proven internal components as the XR-1. The weight savings of the XR-2 comes
from its unique futuristic housing design. The snout area is strengthened by the
addition of internal casting material and external ribs. The XR-2 is the clear cut
choice for the weight conscious racer who still demands reliability.
New for 2020 - all axles feature 1" increased left side spline length to
accomodate deeper offset wheels.
XR2-4.86
Bulldog XR-2
4.86 Complete
Rear
78lbs.
XR-2 Dimensions:
Without Snout Adapter
Standard Features Include:
• O-Ringed Aluminum Gear Cover
• Heat Treated Lower Shaft
• Breather Assembly
• Timken® Pinion Bearings
• Non twist one bolt shifter mount
• 3 quarts Bulldog Blood Oil
• Torque Tube Studs
• Ease-Align Shifter Arm
• Aluminum Front Snout Spacer for
Internal 10-10
Important Specs
Side Bell Nuts- 30 ft./lbs.
Threaded Ring Gear- 60 ft./lbs. w/ Red threadlocker
Pinion Retainer Bolts- 25 ft./lbs.
XR-2 Snout Locking Ring- 70 ft./lbs.
XR-2 Front Spacer Plate Bolts- 35 ft./lbs.
Pinion Backlash- .004-.008
Rotational Pinion Preload (No axle) - 25 in/lbs. @ 70° F
Rotational Pinion Preload (Complete Assembly) - 48 in/lbs. @ 70° F
Starting Recommendations for Shims Left- .060" Right - .060"
Weight Savings of Some Popular Options
XR-2 4.86 Std Rear = 78 lbs.
Description Savings
4.12 Ring & Pinion .75 lbs.
EDM Ring Gear .80 lbs.
Titanium Lower Shaft (Internal 10-10) 1.18 lbs.
Titanium Hardware .89 lbs.
2" I.D. Axle 2.27 lbs.
Important Driveline Lengths when using XR-2 with a 40" Engine Setback
Internal 10-10 Driveshaft – 29” w/ U-Joint Spring
DMI Style Swivel Coupler Driveshaft w/ Snout Spacer – 26.5” w/ U-Joint Spring
Winters Style Swivel Coupler Driveshaft w/ Snout Spacer – 27.5” w/o a U-Joint Spring
Torque Tube w/ Snout Spacer – 27”
Internal DMI Style Swivel Coupler Driveshaft w/o Snout Spacer – 29.25” w/ U-Joint Spring
Internal Winters Style Swivel Coupler Driveshaft w/o Snout Spacer – 30.5” w/o a U-Joint Spring
Torque Tube w/o Snout Spacer – 28”
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