Introducing Pro-Fit HD
American Powertrain Pro-Fit HD 2WD kits for 73-87 Chevy/GMC
Featuring the TREMEC TR-4050 5-Speed. Great for heavy duty use or towing! 2WD edition
- Similar to the NV4500. Direct replacement
- 600 lb/ft of torque capacity
- Aggressive 6.16 “Granny” Gear 1st gear but with economical .76 5th gear
- High-contact, constant mesh, helical gears for maximum strength
- Die-cast aluminum alloy housing saves weight while offering considerable rigidity
- The multiple rail, internal shifter provides excellent shift feel and performance
- Tapered bearing on input, main, and counter shafts provide excellent internal stability
- Needle bearings under gears reduce friction and noise output
- Fully synchronized
- Advanced synchronizer technology promotes smoother shifting and reduced shift effort
- 5th gear synchronizer mounted to the countershaft to improve NVH in overdrive
- 3.67 qt oil capacity
- Heavy Duty 1480 output yoke
Gear ratios: 6.16, 3.11, 1.71, 1, .76 od. rev 6.03
– 10 spline input shaft / Output 1480 yoke
– Torque rating 600lb-ft
– A 6-bolt PTO mount location 6 bolt circle output flange.
– NV4500 bolt pattern
- Torque Capacity – 600 lb.ft / 813 n/m
- Oil Capacity – 3.7 QT / 3.5ltr.
- Weighs 164 lbs. / 74kg
- .590″ Pilot diameter
- 1.125″ Input shaft diameter, 10-spline, 6.5″ length
30-50% increase in fuel economy
Low RPM cruising for greatly reduced driver fatigue and an improved highway driving experience.
Reduced engine wear leading to longer engine life
Cooler engine operating temperature.
White Lightning Shifter for TR4050
X-Factor Adjustable Square Body Crossmember
Bellhousing for 4050
Pilot Bearing – Stainless rollers, grease pre-pak
Reverse Light Harness – Weatherseal
Hardware, Instructions, Warranty
Got an LS swap? We can make it easy.
Hydraulic clutch recommended. Can use a stock pedal and factory hydraulic master cylinder for some model years. Complete Hydraulic System for Squarebody and pedal assembly available.