ireallydontcare
Member
- Joined
- Jun 6, 2019
- Messages
- 86
- Reaction score
- 16
- Points
- 8
- Location
- Maud, Texas
- Vehicle Year
- 90
- Make / Model
- Ford Bronco II
- Engine Type
- 4.0 V6
- Transmission
- Manual
- 2WD / 4WD
- 4WD
Howdy everyone.
So my 1990 Bronco II has axle code D4, 3.73 limited slip. I have an FM146 and 30 inch tires. According to Novak's cruising RPM calculator, my should be 2199 in 5th gear. In reality it is at about 2700. I also did the mark the tire and driveshaft and turn test and it came out to be 3.73. Anyone have any ideas? I have been scratching my head about this since i bought the truck last year.
So my 1990 Bronco II has axle code D4, 3.73 limited slip. I have an FM146 and 30 inch tires. According to Novak's cruising RPM calculator, my should be 2199 in 5th gear. In reality it is at about 2700. I also did the mark the tire and driveshaft and turn test and it came out to be 3.73. Anyone have any ideas? I have been scratching my head about this since i bought the truck last year.