1988 F-Series Drivetrain Info and Codes

Rear Axle Codes
    Code    Manufacturer   Capacity(lb/kg)    Ratio
F-150, F-250, F-350, & F-Super Duty with Conventional
     12         Ford          3800/1723        2.73
     18         Ford          3800/1723        3.08
     19         Ford          3800/1723        3.55
     25         Ford          5300/2403        4.10
     29         Ford          5300/2403        3.55
     35         Ford          6250/2834        4.10
     39         Ford          6250/2834        3.55
     45         Ford          7400/3356        4.10
     49         Ford          7400/3356        3.55
     65         Ford          8250/3741        4.10
     69         Ford          8250/3741        3.55
     72         Dana         11000/4989        4.63
     73         Dana         11000/4989        5.13
F-150, F-250, & F-350 with Limited Slip
     H5         Ford          3800/1723        4.10
     H9         Ford          3800/1723        3.55
     B5         Ford          5300/2403        4.10
     B9         Ford          5300/2403        3.55
     C5         Ford          6250/2834        4.10
     C9         Ford          6250/2834        3.55
     D5         Ford          7400/3356        4.10
     F5         Ford          8250/3741        4.10
Transmission Codes
    Code       Manufacturer        Description        Model     Gear Ratios (R : 1,2,3,4,5,...)
     M            Mazda           Manual 5spd OD     M5OD-R2    3.41 : 3.90 2.25 1.45 1.00 0.80
     5(?)          ZF             Manual 5spd OD     ZFS5-42    5.23 : 5.72 2.94 1.61 1.00 0.76
     F          Borg-Warner       Manual 4spd          T-18     7.44 : 6.32 3.09 1.68 1.00
     P          Borg-Warner       Manual 4spd          T-19        ? : 5.11 3.03 1.79 1.00
     K             Ford           Auto 3spd             C6         ? : 2.46 1.46 1.00
     T             Ford           Auto 4spd OD         AOD         ? : 2.40 1.47 1.00 0.67
 
Engine Line-Up and Specs.
Engine Displacement   4.9L/300       5.0L/302       5.8L/351       7.5L/460       7.3L/445
Type and # of cyl.    Gasoline, I-6  Gasoline, V-8  Gasoline, V-8  Gasoline, V-8  Diesel, V-8
Fuel System           Multiport EFI  Multiport EFI  Multiport EFI  Multiport EFI  Mechanical FI
Bore and Stroke       4.00 x 3.98    4.00 x 3.00    4.00 x 3.50    4.36 x 3.85    4.11 x 4.18
Compression ratio     8.8:1          9.0:1          8.8:1          8.5:1          21.5:1
SAE net horsepower    150 @ 3400     185 @ 3800     210 @ 3800     215 @ 3400     180 @ 3300
Net torque (lbs.ft.)  260 @ 2000     270 @ 2400     315 @ 2800     370 @ 2200     345 @ 1400
Manufacturer          FORD           FORD            FORD          FORD           NAVISTAR
VIN Code (8th digit)  Y              N               H             G              M