Transmission Identification

From Crankshaft Coalition Wiki

Contents 1 Clearing up the Confusion 2 GM Transmissions 2.1 Automatic 2.1.1 General Information 2.1.2 TH250, TH250C, TH350, TH350C, TH375B Transmissions 2.2 Manual 3 Ford Transmissions 3.1 Automatic 3.1.1 General Information 3.1.2 Ford-o-matic S3 3.1.3 C4/C5 3.1.4 C6 3.2 Manual 4 Mopar Transmissions 4.1 Automatic 4.2 Manual 5 Other Transmissions 5.1 Automatic 5.2 Manual 6 Helpful Links

[edit] Clearing up the Confusion

Identifying your transmission can be confusing. The purpose of this page is to help clear up some of the confusion.

[edit] GM Transmissions

[edit] Automatic

[edit] General Information

Transmission Identification By Pan Shape with Gear Ratios

Image Number		Transmission(s)		Pan Bolts		1st Gear		2nd Gear		3rd Gear		4th Gear		Reverse
1		Aluminum Powerglide		14		1.76/1.82		1.00		-		-		1.76/1.82
2		TH200 (Metric), TH200C (Metric)		11		2.54		1.57		1.00		-		2.06
3		TH250, TH250C, TH350, TH350C, TH375B		13		2.52		1.52		1.00		-		1.94
4		TH375C, TH400, TH475, 3L80, 3L80HD		13		2.48		1.48		1.00		-		2.07
5		TH200-4R		16		2.54		1.57		1.00		0.67		2.06
6		TH700-R4, 4L60, 4L60E		16		3.06		1.62		1.00		0.70		2.29
7		4L80E		17		2.48		1.48		1.00		0.75		2.07

Transmission Dimensions

NOTE: An aluminum powerglide also exists with an 18" extension housing.

Typical Application Information

[edit] TH250, TH250C, TH350, TH350C, TH375B Transmissions

Identifying transmissions in the TH350 family

Transmission		Type		Wire Plug		Band Adjusting Screw		Tail Housing
TH250		Non-lockup		None		Yes		6"
TH250C		Lockup		Driver Side		Yes		6" or 9"
TH350		Non-lockup		None		None		None, 6", or 9"
TH350C		Lockup		Driver side		None		None, 6", or 9"
TH375B		Non-lockup		None		None		12"

NOTE: Any of these may also have a switch on the passenger side near the TV cable.

[edit] Manual

[edit] Ford Transmissions

[edit] Automatic

[edit] General Information

Gear Ratios of Popular Ford Automatic Transmissions

Transmission		1st Gear		2nd Gear		3rd Gear		4th Gear
C4/C5/C6		2.46		1.46		1.00		-
AOD/AODE		2.40		1.47		1.00		0.67
4R70W		2.84		1.55		1.00		0.70
E4OD/4R100		2.71		1.54		1.00		0.71

C3/C4/C5/C6/AOD Series Comparison

3-Speed Identification

Transmission(s)		Pan Bolts
C3		13
C4, C5		11
C6		17
FX Cruiso, MX Cruiso, FMX, CW		14

4-Speed Identification

Transmission(s)		Pan Bolts
A4LD, 4R44E, 4R55E		18
AOD, AODE, 4R70W		14
E4OD, 4R100		20

[edit] Ford-o-matic S3

The Cruise-O-Matic

Introduced in 1951, the Cruise-O-Matic series of three-speed automatics (which includes the FMX) was used in Ford, Lincoln and Mercury passenger cars until 1979, and in light trucks from 1968 through 1979.

They came in three configurations:

the small case (from 1951 to 1966)

the medium case (from 1955 to 1968), and

the FMX (from 1967 to 1979)

Early Cruise-O-matics had a filler tube that attached to the transmission pan.

FMX transmissions filler tube slid into the main case.

The Cruise-O-Matic transmissions are easily identified by their design, which incorporates a cast-iron main case (unlike all other Ford three- speed automatic offerings) with separate aluminum bellhousings and extension housings bolted to it. The Cruise-O-Matics should be avoided in performance applications as very little is available in the way of aftermarket performance parts other than shift kits. The Cruise-O-Matics were also offered with all three bolt-common V8-pattern bellhousings.

[edit] C4/C5

• General Information
  • Bell housing: Aluminum
    • Case fill: Attaches to case with 7 pump bolts
    • Pan fill: Attaches to case with 5 bolts around outside of pump
  • Case: Aluminum; 11 pan bolts; 2 adjusting screws; 2 servos; Modulator (Except PEG-A build code)
    • Case fill: Dipstick tube in case
    • Pan fill: Dipstick tube in pan
  • Extension housing (2wd, Divorced 4x4): Aluminum; 6 bolts to case
  • Adapter housing (Married 4x4): 6 bolts to case
    • C4: Cast iron
    • C5: Aluminum
  • Front oil pump: 7 bolts to case
  • Input shaft
    • 24x24 spline (1964-1969)
    • 26x26 spline (1970 only)
    • 26x24 spline (1971-1986)

[edit] C6

• General Information
  • Bell housing: Integral
    • Big block (351M, 460, etc): 7-11/16" top bolt centers, No cutout on bottom
    • Diesel (426): 7-11/16" top bolt centers; Cutout on bottom
    • FE block (330/360/390): Round with starter at about 9:00
    • Lincoln (460): 5-3/4" top bolt centers; Pointed top
    • Lincoln (462): 5-1/4" top bolt centers; Pointed top
    • Small block (302, 351W, etc): 5-1/8" top bolt centers
  • Case: Aluminum; 11 pan bolts; 1 adjusting screw; 1 servo; Modulator
  • Extension housing (2wd, Divorced 4x4): 6 bolts to case
    • Aluminum
      • 7": Bearing; 0, 1, or 2 threaded bosses; With or without speedometer hole
      • 13-7/8": Bushing; With or without damper provision
      • 18": Bushing
    • Cast Iron
      • 5-3/8": Bearing; Bolt-on cast iron speedometer housing
      • 13-3/4": Bushing;
      • 17-1/4": Bushing; Mount near case or near speedometer hole; With or without damper provision
  • Adapter housing (Married 4x4): 6 bolts to case
    • Aluminum
      • 5-3/4": 0, 1, or 2 threaded bosses; 1 or 2 transfer case cutouts
      • 8-3/4"
    • Cast iron
      • 5-3/4": 1 threaded boss; 1 or 2 transfer case cutouts
      • 8-3/4"
  • Front oil pump: 7 bolts to case
  • Input shaft
    • 31x31 splines (1966-1971)
    • 31x30 splines (1972-1996)

[edit] Manual

[edit] Mopar Transmissions

[edit] Automatic

A518/A618 (Left), A727 (Center), A500 (Right)

[edit] Manual

[edit] Other Transmissions

[edit] Automatic

[edit] Manual

[edit] Helpful Links

1. GM Automatic Transmission Identification and InformationVery helpful identification guide with identification by pan and transmission dimensions.
2. Borg Warner Second Design ST-10 4-Speed Info Codes, applications a very informative page.