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Updates: 1989 - 1998
 
Case Related Updates:

1989 - Early 1990: Original Design - Converter anti-drainback vale located in cooler line.
Late 1990-1998: Converter anti-drainback valve in rear line tap @ case.


1991 Addition of an Intermediate Accumulator regulator filter.

(small screen with spring on it located in worm track near OD fluid feed bolt)


1989 Diesel Case 14 checkballs (1st Design)
1990 - 1996 Diesel Case 9 checkballs.
1996 -1998 Diesel Case 8 checkballs.
1989 Gas Case 14 checkballs (1st Design)
1990 - 1996 Gas Case - 5" top bolt center line with 9 check balls
1996 - 1998 Gas Case - 5" top bolt center line with 8 check balls
1996 - 1998 Gas Case - 7-3/4" top bolt center line with 8 check balls
1990 - 1996 Gas Case - 7-3/4" top bolt center line with 9 check balls
Note: Top bolt center line is distance between top bolt holes .

 
1996 Major Updates:

1989-1993 Input shaft 14" (Original design no groove mark on outer small spline end).
1993 - 1998 Input shaft 13.5" (2nd Design, Has 1/8" wide groove mark on outer small spline end).
1994 - 1998 Center Support hub was updated to use a roller bearing
1996 Center Shaft / OD Ring Gear (pilot removed from end of center shaft).
1996 - 1998 Forward Hub to Forward Drum updated to Bearing.

 
1989-98 / 1998 Coast Clutch Lip Seal / Molded Seal:

1989-1998 Replaceable inner & outer lip seals. (1st Design)
1998 Seals molded to piston (2nd Design)
NOTE: Molded seal design requires piston / seal replacement.
NOTE: These two pistons to seal types are not interchangeable.

 
1989-94 / 1995-98 Direct Drum Updates:

1989-1994 Direct Drum with 1 apply hole to piston
1995-1998 Direct Drum with 2 apply hole to piston
NOTE: Direct Drums are fitted for either 3, 4 or 5 friction disc.
NOTE: Two hole apply piston and one hole are NOT interchangeable.

 
Forward Planet Updates: 3 & 4 Pinion / 6 Pinion Steel

1989 - 1998 3 pinion aluminum (Light Duty Applications)
1989 - 1994 4 pinion aluminum
1995 - 1998 4 pinion steel
1998 6 pinion steel

 
Overdrive Planet Updates: 4 Pinion / 6 Pinion Steel
 

1989 - 1998 3 pinion aluminum (Light Duty Applications)
1989 - 1994 4 pinion aluminum
1995 - 1998 4 pinion steel

 
Output Shaft Updates:

1989 - 1998 2WD 7 teeth speedometer gear with snap ring. (3 ID grooves just behind gear)
1995 - 1998 2WD 8 teeth speedometer gear no snap ring (no ID grooves)
1989 - 1998 2WD long style without speedometer gear.
1989 - 1998 4WD early style with snap ring (short style)
1989 - 1998 4WD 14" long without snap ring
1989 - 1994 Retro fit Orifice Plug 0.040" (installed inner end of output shaft).
1995 Orifice was incorporated in to output shaft inner end

 
Overdrive Piston

1989 - 1995 Lip Seal Type
1996 - 1998 Molded Seal on piston
Note: Above pistons are not interchangeable.

 
1995 Manual Lever Position Sensor Connector Updates (MLPS):

1989-1996 Old style MLPS connector.
1997-1998 Updated MLPS connector.
Note: Both style MLPS work 1989 - 1998 with matching connector.

 
1989-94 / 1995 / 1998 Pump Updates:

1989 - 1994 (10 lobe - 1st Design).
1995 Pump (9 lobe - 2nd Design, gears updated for more volume.
1998 Pump & TCC Solenoid update for Diesel Applications.

 
1989-96 / 1997-98 Reverse Hub & Roller Race Updates:

1989 - 1996 Cast Iron Reverse Hub
1989 - 1996 Low Inner Race (original design for Cast Iron Hub)
1997 -1998 Stamped Steel Reverse Hub with New Inner Race size.
NOTE: Above Reverse Hubs and Inner Races are not interchangeable.

 
1989-96 / 1997-98 Low / Reverse Piston:

1989 - 1995 18 spring notches / Square cut inner and outer piston seals.
1996 - 1998 23 spring notches / Lip Seal inner and outer piston seals.
Note: Above pistons are not interchangeable.
Note: Above pistons must have correct return spring assembly.

 
1989 / 1990 / 1991-1998 Torque Converter Anti-drain back valves.

1989 In cooler line 5/16" Cooler Line Union.
1990 At rear cooler line tap 5/16" fitting. F0TZ-7D174-B
1991-1998 At rear cooler line tap 3/8" fitting. F0TZ-7D174-C

 
Servo, (Coast Clutch - Manual 2nd Band Apply)

2nd Design One-Piece Band Apply Servo.
Original Servo securing Snap Ring and Retaining plate are not used with update Band Apply Servo

 
 1989-93 / 1994-97 / 1998 Overdrive Sprag / Roller Clutch Updates:

1989 -1993 Overdrive Input Sprag (1st Design, 34 element).

1994 - 1997 Overdrive Roller Clutch, white plastic cage with 12 rollers.

1998 Overdrive Roller Clutch, black plastic cage with 12 rollers.

 
 1989-1998 Valve Body & Case Worm Track Checkball Updates:
 

1989-1998 - (1) 1/4" steel EPC relief ball & spring below Solenoid valve body and separator plate. E9TZ-7D017-A

Early 1989 - (14) worm and (2) main valve body 5/16" rubber checkballs E7DZ-7E195A

Late 1989 - (10) worm and (2) main valve body 5/16" rubber checkballs; E7DZ-7E195A
and (1) worm 5/16" steel checkball. E7DZ-7E195A

1990-1995 (9) worm / (2) main valve body 5/16" rubber checkballs E7DZ-7E195A
1996-1998 (8) worm 5/16" rubber checkballs; and E7DZ-7E195A
(3) 1/4" & (2) 5/16" Main Control valve body rubber checkballs

 
  1989-1990 Valve Body Gasket Updates:
 

1989 No color Strip - 1989 Case/valve body Only

1990 - 1994 Blue Stripe (discontinued)

1990 - 1998 - Yellow Stripe (not for use in 1989 case/valve body)

(supersedes blue stripe gasket)

 
NOTE: 1990-1995 Valve Body Gaskets can NOT be interchanged with 1989 gasket.

 
1989-1990 Valve Body Separator Plate:

1989 2 square cut notches. (Cuts are on near rear tang)

1990 - 1995 2 half moon cut notches. (Cuts are on rear tang)

1996 - 1998 No notches.
Note: Above different separator plates are NOT interchangeable.

 
 1989-94 / 1995-97 / 1998 Solenoid Valve Body Updates:

1989-1994 1st Design.

1995 -1997 2nd Design.

1995 -1997 2nd Design with black shield.

1998 3rd Design Gray shield (Gas and Diesel Versions)

 
 1989-95 / 1995-98 Accumulator Valve Body Updates:

1989-1995 1st Design, Cast number begins with E9xx

1995 -1998 2nd Design, Cast number begins with F5xx

 
 1989-95 / 1995-98 Accumulator Valve Body Updates:

1989-1995 1st Design, Cast number begins with E9xx

1995 -1998 2nd Design, Cast number begins with F5xx

 
1989-94 / 1995-98 Main Control Valve Body Updates:

1989 1st Design, Cast number begins with E9xx

1990 -1995 2nd Design, Cast number begins with F0xx

1996 - 1998 3rd Design, Cast number begins with F6xx

 


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