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An Index to Service Information for 1951-54 (24th->54th Series) Packards

1951-54 (24th->54th Series) - ULTRAMATIC

SubjectApplicationDocument
Bearings, Care of Ball and Roller
installation/removal damage - proper support
(all models)
Bell Housing and Bushing Assembly
oil leaking past seal - drain back area increased
25th
Bell Housing Oil Seal
leather leaks - use neoprene
23rd-24th;
(25th-55th)
Bell Housing Oil Seal Leaks
converter mis-alignment - checks
23rd-24th;
(25th-56th)
Bell Housing Seal Drain Hole - Enlarged
leaks - drain hole enlarged
24th
Brake Piston Seal Retainer - Part No. 423084
low and reverse - proper thickness
23rd-54th
Breather Oil Leaks
speeds over 30MPH - speedometer driving gear installed backwards
23rd-26th
Breather, Late Type
oil loss - new design, relocated
23rd-24th
Bushing Tools, Service
description and illustration of use
23rd-24th
Bushing Tools, Service
description and illustration of use
23rd-55th
Bushings and Bearings, Service
part number reference
23rd-56th
Bushings, Service
now available for service - see SC Vol. 24, No. 11
23rd-24th
Bushings, Service
part number reference
23rd-55th
Bushings, Service
part number reference
23rd-24th
Changes in...
converter pump broken, governor valve sticking - reactor shaft bearing kit, anodized governor parts
54th
Changes in… (Confidential) (REVISED)
production - typos
26th
STB 53T-3R (Zones only)
Changes in… (Confidential)
production - with part, effective date/unit
23rd-24th
STB 51T-10 (Zones only)
Changes in… (Confidential)
production - with part, effective date/unit
24th
STB 51T-14 (Zones only)
Changes in… (Confidential)
production - with part, effective date/unit
23rd-24th
STB 51T-3 (Zones only)
Changes in… (Confidential)
production - with part, effective date/unit
24th
STB 51T-36 (Zones only)
Changes in… (Confidential)
production - with part, effective date/unit
24th-25th
Changes in… (Confidential)
production - with part, effective date/unit
26th
Changes in… (Confidential)
production - with part, effective date/unit
26th
Clutch Housing Bushing Tools, 9-in. Converter
new special tools
25th
Control Assembly Part No. 423800 (exc. Gear Start)
superceded part - exceptions
23rd-54th
Control Valve: Changes to Improve Shift Pattern
update to 56th Series - new valving kits
54th-55th
Control Valve: Damper - New Type
pulsation/flutter - new type valve
23rd-24th
Control Valve: Plug Gauge Set
special tool for 23rd Series, also for 24th - indentification chart
24th
Control Valve: Torque-Tightening
stuck valves - fluid/pressure leaks
(NOTE: page missing from archived document)
23rd-56th
Control Valve: Valve Body, Upper
new production, die-cast - requires spring-type check valve
23rd-24th
Converter: Application Chart
part number reference - incl. flywheel
23rd-25th
Converter: Assemblies - Balanced
9-in. type - service precautions
25th
Converter: Corrosion Preventative in Replacements
silica gel pack - remove
23rd-24th;
(25th-56th)
Converter: Fluid Leaks
damaged washers - use of sealant
23rd-56th;
56J
Converter: Inlet Pressure
lower pressure in reverse
23rd-24th
Converter: Outlet Valve
check valve found - removal
24th
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-56th
Converter: Pump Shaft - Oil Pump Rotor Splines - Worn or Stripped
new 40-spline service parts
54th-55th-56th
Converter: Pump Shaft and Oil Pump Rotor
worn/stripped splines - corrections, superseded parts)
54th-55th-56th;
56J
Converter: Reaction Clutch Sprags
premature failure - replace in sets
54th-55th-56th;
56J
Converter: Reaction Clutch Sprags
replacement - use of reaction clutch assembly
54th-55th-56th;
56J
Converter: Reactor Shaft Bushing Clearance
direct drive failure - excessive clearance
23rd-24th;
(25th-55th)
Converter: Reactor Shaft Bushing Installer Spacer
9-in. converter, shallower setting - new special tool
25th
Converter: Reactor Shaft Thrust Bearing
new type - superseded parts
26th-54th
Converter: Reactor Shaft, Thrust Bearing
new type - identification, service
26th
Converter: Relief Valve
eliminated in production - replace with plug
25th
Converter: Retaining Screw Changes
self-locking screws, special washers - torque spec
24th
Converter: Torque
new 9-in type - description
24th-25th
Converter: Whine or Whistle
oil flow, insufficient vane clearance - new style first turbine
25th
Diagnosis
basic procedure, pressure tests, adjustments
23rd;
(24th-54th, exc. Gear Start)
Diagnosis and Pressure Check Information (exc. Gear Start)
direct drive clutch engagement - procedures
23rd-54th
Direct Drive Clutch - see also:
Diagnosis and Pressure Check Information
--
--
Direct Drive Clutch: 9-in.Converter
does not engage - new type clutch piston
25th
Direct Drive Clutch: Fails to Disengage
engine stalling - enlarge governor oil vent
23rd-26th
Direct Drive Clutch: Fails to Disengage
engine stalling - governor modification
25th-54th
Direct Drive Clutch: Piston Ring Gap, Checking
precautions - specifications
23rd-24th;
(25th-54th, exc. Gear Start)
Direct Drive Clutch: Plate - 11-1/4 and 9-in. Diameter
torsional disturbance, roar - new types, larger spring openings
23rd-26th
Direct Drive Clutch: Plate - 9-in. Diameter
torsional disturbance, roar - superseded part, larger spring openings
24th-26th
Direct Drive Clutch: Plates - 11-1/4-in.
torsional disturbance, with new style planetary dampers - enlarged spring openings
23rd-25th
Direct Drive Clutch: Release - Gear Start
slow/no release in drive - new governor and parking lock gear
54th
Direct Drive Clutch: Slippage - Gear Start
slipping due to oil - removal of chamfers
54th
Direct Drive Clutch: Slippage
retained oil - rework clutch facing chamfers
54th
Disturbance in Reverse
insufficient oil - rear pump check valve modification
25th
Disturbance in Reverse
oil restricted, aerated - enlarge check valve opening
25th
Engine Runaway - Flare - Low Brake Information
premature failure of high range clutch - summary of checks and corrections
54th-55th-56th
Engine Runaway
low range brake spring changes
54th-55th
Engine Runaway/Flare - see also:
Front Oil Pump
High Range Clutch
Low Range Brake
Throttle Control/Linkage
Throttle/Timing Valve
--
--
Engine Support Bar Screws
special tool update - longer screws required
24th;
(25th-54th)
Filling Gear-Start Transmission
suggested tool - fabrication
54th
Flat Rate Manual, Changes in
inspection and fluid change - sheets attached
24th-54th
Fluid Drain Can
new special tool - fluid filtering/reuse
23rd-24th;
(25th-56th)
Fluid Drain Period Revised
increased - level check unchanged
23rd-24th
Fluid Level, Checking
converter outlet check valve eliminated - check within one minute
23rd-24th
Fluid Temperature Affects...Upshift
loss of pressure, bushing wear - pressure tests
54th-55th-56th;
56J
Flywheel
superseded parts - 9- and 11-1/4-in. converters
23rd-25th
Flywheel Attaching Screws (Part Number - Correction)
self-locking washers
23rd-25th
Flywheel Attaching Screws
discard old screws - use new self-locking type
23rd-25th
Flywheel Housing Support Kit, Installing
rework holes - shims
2401
Flywheel Screw
superceded part
23rd-24th
Flywheel Screws
part number correction
23rd-25th
Forward Gears Inoperative, Transmission (exc. Gear Start)
front pump relief valve sticking
23rd-54th
Front Oil Pump - see also:
Converter Pump Shaft
--
--
Front Oil Pump and Converter Shaft Kits
new parts
54th-55th-56th
Front Pump Relief Valve
material conservation - oversized parts
26th
Front Pump Relief Valve Spring Seat
high range delay, sticking valve - new seat
24th
Gear Shift Lower Bracket
superseded parts
24th
Governor Adaptor Screen - Ultramatic Drive
governor sticking - filter added
24th
Governor Cleaning Brushes
new special tool - nylon
23rd;
(24th-54th, exc. Gear Start)
Governor Flyweight Ring Tool
alternative tool - fabrication
23rd;
(24th-54th, exc. Gear Start)
Governor Housing and Inlet Valve
governor rattle - venting changed
23rd-25th
Governor Nylon Gears - Stripped
driving or driven - torque tightening procedure
23rd-26th
Governor Removal
insufficient frame clearance - revised procedure
24th
Governor Valves Sticking
oil screen cleaning
23rd-24th;
(25th-54th)
Governor Vent Valve and Support
sticking - improved design
23rd-25th
Governors, Cleaning
inspection, dressing, washing
23rd;
(24th-54th, exc. Gear Start)
High Range Clutch: (failures)
operating precautions
56th;
(54th-55th)
High Range Clutch: 10 and 12 Plate Assemblies, Identifying
visual indicators - parts interchange
23rd-25th
High Range Clutch: Assembly
lubrication improved - vent springs/holes eliminated
23rd-26th
High Range Clutch: Lubrication and Operation
production changes
25th
High Range Clutch: Piston Ring Gap, Checking
precautions - specifications
23rd-24th;
(25th-54th, exc. Gear Start)
High Range Clutch: Plates - Replacement
use of new parts only
23rd-25th
Leaks - see also:
Bell Housing Oil Seal
Breather
Converter
Oil Leaks/Loss
--
--
Linkage Adjustments (exc. Gear Start)
selector, control valve, throttle control and valve, kickdown
24th-54th
Linkage Adjustments - see also:
Throttle Control Rod
Throttle Linkage
Throttle Valve Lever
--
--
Linkage Adjustments
new model information
24th
Linkage Adjustments
new model information
24th
Linkage Adjustments
selector, control valve, throttle - latest, updated procedures/special tools
23rd-26th
Low and Reverse Bands
reduced width - interchangeable
24th
Low Range Drum to Reactor Clutch Housing Clearance
specification increased
23rd-24th
Low Range Operation
high range clutch failure - proper use of low range
23rd-25th;
(26th-56th)
Low Range Operation
high range failure - proper use
23rd-25th;
(26th-56th)
Low Speed Disturbance
direct drive - alter shift point
54th-55th
Measuring End Thrust Clearance
revised procedure
24th
Oil Leaks
from flywheel housing - locating source
23rd-25th
Oil Leaks
past articles referenced
23rd-54th
Oil Leaks, Starter Safety Switch
gasket failure - installation assist
23rd-54th
Oil Loss at Breather
level, restrictions, overheating - relocation
23rd-56th;
56J
Oil Loss Through Breather
checks - rear housing passage, planetary oil ring, rear oil pump
24th
Oil Pressure Changes
production change - revised test specifications
23rd-25th
Oil Screen
governor/valves sticking - cleaning
23rd-24th;
(25th-54th)
Oil Seal Replacer - Rear Housing
new special tool
24th
Oil Seals
damage, leaks - special tools, proper use
23rd-24th
Operation - Coasting
discouraged - high range clutch wear
23rd-25th
Operation Under Emergency Conditions
rocking, long pulls, steep grades - use low range
23rd-25th
Park, Locking in
pawl and gear clearance - loose, worn, damaged parts
54th-55th-56th
Piston Ring Gap, Checking
direct drive, high range clutches - specifications
23rd-24th;
(25th-54th, exc. Gear Start)
Planetary Assembly
balanced - identification
26th
Planetary Cage Damper
low speed disturbance - backlash dampers added
24th
Planetary Cage Damper
low speed disturbance, backlash - new type
24th
Planetary Cage Damper Installer
new dampers - new special tool
24th
Pump Check Valve Noise
click/flutter - new type valve
23rd-24th
Pump Check Valve Noise
clicking, fluttering - new spring-type valve
23rd-24th
Rear Housing Bearing Retainer Ring Pliers
new special tool
24th
Rear Oil Pump Driver
premature wear - hardened
54th-55th-56th
Rear Oil Pump Driver
premature wear - redesigned
54th-55th-56th
Rear Oil Pump Driver
premature wear - redesigned
54th-55th-56th
Rear Oil Pump Rotor Sets
cost savings - new kits
54th-55th-56th
Reverse Not Released - Tips From The Editor
planetary ring gear bushing scored/seized - band adjustment, piston sticking
23rd-54th
Reverse Piston Seal Retainer and Band Adjusting Screw
high range clutch failure, dislocated seal - improved parts, same numbers
23rd-26th
Serial Number
new range - different speedometer drive gear
26th
Serial Number
unit reference chart - revised
26th
Serial Number Correction - Die-Cast Valve Bodies
starting numbers incorrect in STB 52T-1, Dealer 1
23rd-24th
Service Information, Confidential - Gear Start
slippage, no upshift, harsh downshift - low front pump pressure, low range brake orifice
54th
Speedometer and Governor Driving Gears, Nylon
production change - service replacement
26th
Speedometer and Governor Gears, Nylon
superseded steel parts
23rd-26th
Speedometer Pinions and Adapters
offset pinion bore - part number reference
23rd-54th
Throttle Control Rod
bent - length data
24th-54th
Throttle Control Rod
bent - length data
24th-55th
Throttle Control Rod Adjustment
bent - rod length data
24th-55th
Throttle Control Rod Splasher
binding linkage - snow/slush build-up
24th
Throttle Cross Shaft to Carburetor Rod Tool
special tool revised - 359-cid engine, modification
5406-13-26-31
Throttle Linkage Adjustment Change
high range clutch burning - revised procedure
24th
Throttle Linkage Adjustment Change
revised procedure
24th
Throttle Linkage Adjustments
supplement - corrections/variations
54th-55th-56th
Throttle Valve and Timing Valve Kit
engine runaway - improved design
23rd-26th
Timing Valve Timing Pin - Revised
excessive overlap low-to-high, cold - fabricating smaller pin
23rd-26th
Torque Specifications
revised - shop manual
24th-25th
Transmission Lifting Tool
new special tool - production change, modification for old tool
26th
Transmission Removal - Warning
359-cid engine - heavy-duty air cleaner removal
5406-13-26-31
Transmission, Service
serial number suffix - updated parts
23rd-26th
Transmissions, Service - Stripped
shipped less bell housing
54th-55th
Ultramatic Drive Tool
suggested tool - assembly line-up arbor, fabrication
23rd;
(24th-54th)
Universal Joint Flange Bolt
click, loosening - new type
54th-55th
Universal Joint Flange Bolt
click, loosening - new type
54th-55th

SC = Service Counselor
SL = Service Letter
STB = Service Technical Bulletin
SSB = Studebaker Service Bulletin

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Though previously published elsewhere, this work is provided with my full permission for display on the PackardInfo.com website and the personal use of visitors to that site. Any other unauthorized use, however, is expressly prohibited and may be subject to prosecution. Also, because this index was compiled from documents published by the factory, neither the author nor PackardInfo.com are responsible for errors in content arising from source information.

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