DIVERSIFIED MACHINE INC. 2020 PRODUCT GUIDE
BB-3.78
Baby Bulldog 3.78
Complete Magnesium
Rear w/ 31 Spline
44-3 Axle
55lbs.
BB-4.33
Baby Bulldog 4.33
Complete Magnesium
Rear w/ 31 Spline
44-3 Axle
55lbs.
The Baby Bulldog is the strongest rear made for midget racing.
Compared to other rears on the market, the Baby Bulldog
offers strength, reliability, is user friendly and doesn't leak. 7068
aircraft aluminum makes a Baby Bulldog axle the strongest
available - period! Take a walk through the pits and see that the
BB-1 is the quick change midget rear chosen by more teams
than any other brand.
BB-1 Dimensions:
Standard Features Include:
• Breather Assembly
• Heat Treated Lower Shaft
• Non-Twist One Bolt Shifter Mount
• O-Ringed Aluminum Gear Cover
• 3 Quarts Bulldog Blood Oil
• Torque Tube Studs
• 9/16" Hex on all Plugs
Important Specs
Side Bell Nuts- 30 ft./lbs.
Threaded Ring Gear- 60 ft./lbs. w/ Red threadlocker
Pinion Retainer Bolts- 25 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- .065" Right - .055"
Weight Savings of Some Popular Options
BB-1 4.33 = 55 lbs.
Description Savings
EDM Ring Gear .48 lbs.
Titanium Lower Shaft (Internal 10-10) .81 lbs.
Titanium Hardware .75 lbs.
36 Spline Axle 2.5 lbs.
38 BULLDOGREARS.COM | 717.397.5347 | DIVERSIFIEDRACING.COM