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An Index to Service Information for 1955-56 (55th->56th Series) Packards

An Index to Service Information for
for 1955-56 (55th->56th Series) Packards


Research and Introductions by Brian Harpst
MAIN SERVICE INDEX
     ~1955-56 (55TH->56TH SERIES)
          ~TWIN ULTRAMATIC
SC = Service Counselor
STB = Service Technical Bulletin
SSB = Studebaker Service Bulletin

TWIN ULTRAMATIC

NOTE: These PDFs were created from High Quality Scans. It is recommended that you Right Click on the link(s) above and do a "Save Target As". This will download the PDF to your machine rather than trying to open and view it over the web.
SubjectApplicationDocument
Accelerator Linkage, Adjusting
throttle linkage - shift point
56thSC Vol. 30, No. 5, p. 18
Band Adjustments
clarification of STB 56T-6
56thSTB 56T-11 (Zones only)
Bearings, Care of Ball and Roller
installation/removal damage - proper support
(all models)SC Vol. 20, No. 8
Bell Housing Oil Seal
leaks - superseded part, use of prelube
56th;
56J
SSB No. 351, p. 4
Bell Housing Oil Seal
leather leaks - use neoprene
23rd-24th;
(25th-55th)
SC Vol. 25, No. 8, p. 31
Bell Housing Oil Seal Leaks
converter mis-alignment - checks
23rd-24th;
(25th-56th)
SC Vol. 25, No. 10, p. 40
Breather
fluid leaking - check level, relocate
56thSC Vol. 30, No. 9, p. 34
Bushing Tools, Service
description and illustration of use
23rd-55thSC Vol. 28, No. 12, p. 65
Bushings and Bearings, Service
part number reference
23rd-56thSSB No. 355, p. 6
Bushings, Service
part number reference
23rd-55thSC Vol. 28, No. 12, p. 70
Buzzing Noise in Reverse
pump check valve binding - rework
55thSC Vol. 28, No. 12, p. 70
Changes inů (Confidential)
production - with part, effective date/unit
55thSTB 55T-11 (Zones only)
Changes inů (Confidential)
production - with part, effective date/unit
56thSTB 56T-6 (Zones only)
Changes inů
production - with part, effective date/unit
55thSTB 55T-22 (Zones only)
Control Valve: Assemblies, Complete
identification - not interchangeable
55th-56thSSB No. 358, p. 6
Control Valve: Changes to Improve Shift Pattern
update to 56th Series - new valving kits
54th-55thSC Vol. 30, No. 8, p. 29
Control Valve: Torque-Tightening Controls
stuck valves - fluid/pressure leaks
(NOTE: page missing from archived document)
23rd-56thSC Vol. 30, No. 9, p. 35
Control Valve: Torquing Valve Body Bolts
erratic pressure readings
55thSC Vol. 29, No. 4, p. 24
Control Valve: Valve Springs and Spacer - Caribbean
production change - new type
5588STB 55T-26 (Zones only)
Converter: Fluid Leaks
damaged washers - use of sealant
23rd-56th;
56J
SSB No. 350, p. 1
Converter: Pump Shaft - Oil Pump Rotor Splines - see also:
Front Oil Pump
----
Converter: Pump Shaft - Oil Pump Rotor Splines - Worn or Stripped - Correction
new 40-spline service parts
54th-55th-56thSC Vol. 30, No. 5, p. 17
Converter: Pump Shaft - Oil Pump Rotor Splines - Worn or Stripped
new 40-spline service parts
54th-55th-56thSC Vol. 30, No. 3, p. 10
Converter: Pump Shaft and Oil Pump Rotor
worn/stripped splines - corrections, superseded parts
54th-55th-56th;
56J
SSB No. 331, p. 4
Converter: Reaction Clutch Sprags
premature failure - replace in sets
54th-55th-56th;
56J
SSB No. 348, p. 3
Converter: Reaction Clutch Sprags
replacement - use of reaction clutch assembly
54th-55th-56th;
56J
SSB No. 358, p. 7
Converter: Reactor End Play
new measuring method and special tool
55thSC Vol. 29, No. 3, p. 21
Converter: Reactor End Play
revisions to checking method and special tool
56thSTB 55T-52, Dealer 43
Converter: Reactor Shaft Bushing Clearance
direct drive failure - excessive clearance
23rd-24th;
(25th-55th)
SC Vol. 25, No. 8, p. 31
Converter: Torque (Reactor End Play)
improved end play control, elimination of wave washer - assembly superseded, identification
56th;
56J
SSB No. 331, p. 6
Converter: Torque (Reactor End Play)
wave washer kit cancelled
56th;
56J
SSB No. 339, p. 4
Direct Drive Clutch: Engagement
shift valve piston and spring
55thSC Vol. 29, No. 2, p. 18
Direct Drive Clutch: Engagement
slipping - new high speed governor spring
55thSC Vol. 29, No. 9, p. 45
Direct Drive Clutch: Engagement
slipping and shift points
55thSTB 55T-7, Dealer 6
Direct Drive Clutch: Engagement, Loss of
input/crankshaft end play, bushing position, restricted fluid passages - modifications
55thSSB No. 320, p. 4
Direct Drive Clutch: Piston Ring Installation, Converter
improper/slow engagement - check ring gap
55th-56th;
56J
SSB No. 358, p. 6
Direct Drive Clutch: Slippage - Gear Start
slipping due to oil - removal of chamfers (reference for SC Vol. 29, No. 9, p. 45)
54thSC Vol. 28, No. 10, p. 58
Direct Shift Valve Piston Spring Seat
clutch engagement point, valve body leaks - correct installation
55thSC Vol. 29, No. 5, p. 30
Direct Shift Valve Piston Springs
interchangeable parts
55thSTB 55T-43, Dealer 34
Engine Runaway - Flare - Low Brake Information
premature failure of high range clutch - summary of checks and corrections
54th-55th-56thSC Vol. 30, No. 7, p. 25
Engine Runaway - Low to High Shifts
high range clutch piston oil passages restricted - modification
55thSC Vol. 29, No. 8, p. 40
Engine Runaway - Low to High Shifts
low throttle pressure - install extension kit
55thSTB 55T-32, Dealer 23
Engine Runaway - Low to High Shifts
low throttle pressure - install extension kit
55thSC Vol. 29, No. 9, p. 45
Engine Runaway
low range brake spring changes
54th-55thSTB 56T-2, Dealer 1
Engine Runaway
new valve body separator plate, low range brake spring changes
56thSTB 56T-7, Dealer 5
Engine Runaway/Flare - see also:
Front Oil Pump
High Range Clutch
Low Range Brake
Push Button Control
Throttle Control/Linkage
----
Filler Tube Length (and dipstick)
shorter - not interchangeable
55thSC Vol. 29, No. 3, p. 19
Fluid Temperature Affects...Upshift
loss of pressure, bushing wear - pressure tests
54th-55th-56th;
56J
SSB No. 339, p. 5
Fluid, Transmission - Correction
fluid identification number
55thSC Vol. 29, No. 10, p. 54
Fluid, Transmission
improved type - anti-friction qualities, cold-weather perfomance
55thSC Vol. 29, No. 8, p. 41
Front Oil Pump - see also:
Converter Pump Shaft
----
Front Oil Pump and Converter Shaft Kits
new parts
54th-55th-56thSC Vol. 30, No. 8, p. 32
Front Oil Pump Oil Passage Restriction Test
engine runaway/flare, premature high range clutch failures - diagnosis
55th-56thSC Vol. 30, No. 6, p. 21
Gearshift Indicator Pointer
misalignment - new clamp
55thSC Vol. 29, No. 7, p. 37
High Range Clutch: (failures)
operating precautions
56th;
(54th-55th)
SC Vol. 30, No. 4, p. 16
High Range Clutch: Burning
high range clutch spring and piston
55th-56th;
56J
SSB No. 327, p. 8
High Range Clutch: Burning
spring data correction
55th-56th;
56J
SSB No. 338, p. 3
High Range Clutch: Driving Plate
new heavy-duty type - installation procedure
55th-56th;
56J
SSB No. 344, p. 2
High Range Clutch: Housing - Part Nos. 458950 and 6484046
clearance checks - grind welds
55th-56th;
56J
SSB No. 359, p. 6
High Range Clutch: Housing - Part Nos. 458950 and 6484046
damaged seal, insufficient chamfer - return for exchange
55th-56th;
56J
SSB No. 346, p. 4
High Range Clutch: Housing Identification
differentiation - check end play as installed
55th-56th;
56J
SSB No. 346, p. 4
High Range Clutch: Problems
load pick up and slippage - checks, adjustments, and service precautions
55th-56thSSB No. 320, p. 5
Hydraulic Tests
preliminary service information
55thSC Vol. 28, No. 11, p. 62
Leaks - see also:
Bell Housing Oil Seal
Breather
Converter
Oil Loss
----
Linkage Adjustments - see also:
Throttle Control Rod
Throttle Linkage
Throttle Valve Lever
----
Low Range Brake: Cap
distorted - designed shape
56thSC Vol. 30, No. 5, p. 20
Low Range Brake: Functions Improperly
distorted cap
55thSTB 55T-17, Dealer 15
Low Range Brake: Functions Improperly
distorted cap
55thSC Vol. 29, No. 9, p. 45
Low Range Brake: Information
harsh, noisy, runaway/flare - correct springs, new separator plate
56thSTB 56T-18, Dealer 15
Low Range Operation
high range clutch failure - proper use of low range
23rd-25th;
(26th-56th)
SC Vol. 25, No. 14, p. 67
Low Range Operation
high range failure - proper use
23rd-25th;
(26th-56th)
STB 51T-39, Dealer 34
Low Regulator Valve
kickdown runaway - oil passage change
55thSC Vol. 29, No. 7, p. 38
Low Speed Disturbance
direct drive - alter shift point
54th-55thSC Vol. 30, No. 2, p. 5
Manual Valve Control Lever Inner Stop
superseded part - modified installation
55thSSB No. 324, p. 5
Oil Cooler
leaks - internal modifications, same number
55th-56thSSB No. 322, p. 4
Oil Loss
breather - relocation
(56th);
56J
SSB No. 319, p. 5
Oil Loss at Breather
level, restrictions, overheating - relocation
23rd-56th;
56J
SSB No. 339, p. 3
Park, Locking in
pawl and gear clearance - loose, worn, damaged parts
54th-55th-56thSSB No. 340, p. 4
Parking Lock Sticking
control lever set screw relocated - rod shortened
55thSC Vol. 30, No. 1, p. 4
Parking Lock Sticking
manual valve modification - new parking gear
55thSC Vol. 29, No. 7, p. 36
Pressure Test Plug, (Front) Pump
production change - fabricate test adapter
55thSC Vol. 29, No. 3, p. 20
Push Button Control: (actuator-to-manual shaft set screw)
superseded part
56thSSB No. 350, p. 8
Push Button Control: (malfunctions)
checks, adjustments, and precautions
56thSSB No. 327, p. 6
Push Button Control: Actuator Shaft (set) Screw
accessibility - new Allen head design
56thSC Vol. 30, No. 7, p. 27
Push Button Control: Adjusting Actuator-to-Transmission Control Valve Detent
loss/delay of high range - special procedure
56thSSB No. 338, p. 3
Push Button Control: Armature Test
special methods
56thSTB 56T-26, Dealer 20
Push Button Control: Bent Actuator Fingers
overtravel - straightening
56thSC Vol. 30, No. 3, p. 12
Push Button Control: Circuit Breaker
superseded part - modification
56thSSB No. 351, p. 3
Push Button Control: Inoperative
overtravel, finger damage - rework contact segment
56thSSB No. 322, p. 4
Push Button Control: Left-Side Conversion
driver accessibility issues
56thSC Vol. 30, No. 6, p. 23
Push Button Control: Light Leak
at control buttons - felt mask
56thSC Vol. 30, No. 1, p. 3
Push Button Control: Pressure Switch
water leak/shorts - relocation
56thSC Vol. 30, No. 2, p. 8
Push Button Control: Push Button Type Control
preliminary information/service
56thSC Vol. 29, No. 11, p. 55
Push Button Control: Relay Water Trough
water leak/shorts
56thSC Vol. 30, No. 1, p. 3
Push Button Control: Removal of Automatic Park Relay
pawl damage
56thSTB 56T-25 (Zones only)
Push Button Control: Removal of Control Relay
redundant part
56thSC Vol. 30, No. 1, p. 2
Push Button Control: Retaining Clip (Switch Actuator)
new service part
56thSSB No. 324, p. 4
Push Button Control: Supplement
Automatic Park Relay added
56thSC Vol. 29, No. 12, p. 62
Push Button Control: Towing Instructions
precautions
56thSTB 55T-46, Dealer 37
Push Button Control: Towing, Road Testing and (CORRECTED)
precautions
56thSTB 56T-4C, Dealer 3
Push Button Control: Towing, Road Testing and
precautions
56thSTB 56T-4, Dealer 3
Push Button Control: Vent
actuator - condensation and oil
56thSSB No. 322, p. 4
Push Button Control: Water in Actuator
leaks at wires
56thSC Vol. 30, No. 6, p. 22
Rattle (converter)
loose direct drive pressure plate screws - replace and/or retorque
55th;
(56th)
STB 55T-40, Dealer 31
Rear Oil Pump Driver
premature wear - hardened
54th-55th-56thSTB 55T-47, Dealer 38
Rear Oil Pump Driver
premature wear - redesigned
54th-55th-56thSC Vol. 30, No. 1, p. 4
Rear Oil Pump Driver
premature wear - redesigned
54th-55th-56thSTB 56T-9, Dealer 7
Rear Oil Pump Rotor Sets
cost savings - new kits
54th-55th-56thSC Vol. 30, No. 3, p. 11
Selector Lever Stops
no stops - wrong lever
55th-56thSC Vol. 29, No. 12, p. 66
Shift Pattern
operating information
55thSTB 55T-6, Dealer 5
Shift Pattern, Earlier
upshift modification
5640-60SC Vol. 30, No. 7, p. 27
Throttle Control Rod
bent - length data
24th-55thSC Vol. 29, No. 4, p. 26
Throttle Control Rod Adjustment
bent - rod length data
24th-55thSSB No. 340, p. 7
Throttle Control Rod Adjustment
supplemental rod length data
56thSSB No. 344, p. 4
Throttle Control Shaft Lever Extension Kit, Carburetor
unwanted kickdown - revised geometry
55thSC Vol. 29, No. 7, p. 36
Throttle Control Shaft Lever Extension, Carburetor
application extended to early 56th
55th-56thSC Vol. 29, No. 12, p. 65
Throttle Linkage Adjustment (Caribbean Carburetors)
new model information
5588SC Vol. 29, No. 6, p. 32
Throttle Linkage Adjustment
Training Book correction
55thSC Vol. 29, No. 6, p. 34
Throttle Linkage Adjustments
supplement - corrections/variations
54th-55th-56thSSB No. 340, p. 7
Throttle Linkage, Adjusting (Accelerator)
shift point
56thSC Vol. 30, No. 5, p. 18
Torque Specification Change
universal joint flange bolt
55thSC Vol. 29, No. 8, p. 41
Transmission - Caribbean
replacement - important differences
5588SC Vol. 29, No. 9, p. 45
Transmission Replacement - Caribbean
important differences
5588STB 55T-20, Dealer 17
Transmissions, Service - Stripped
shipped less bell housing
54th-55thSC Vol. 29, No. 7, p. 37
Universal Joint Flange Bolt
click, loosening - new type
54th-55thSTB 55T-4, Dealer 4
Universal Joint Flange Bolt
click, loosening - new type
54th-55thSC Vol. 29, No. 9, p. 46

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