Factory Service Index - Packard Motor Car Information

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

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

MAIN SERVICE INDEX -> 1951-54 (24TH->54TH SERIES) -> ULTRAMATIC

Subject	Application	Document
Bearings, Care of Ball and Roller installation/removal damage - proper support	(all models)	SC Vol. 20, No. 8
Bell Housing and Bushing Assembly oil leaking past seal - drain back area increased	25th	SC Vol. 26, No. 2, p. 8
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
Bell Housing Seal Drain Hole - Enlarged leaks - drain hole enlarged	24th	SC Vol. 25, No. 14, p. 67
Brake Piston Seal Retainer - Part No. 423084 low and reverse - proper thickness	23rd-54th	SSB No. 344, p. 4
Breather Oil Leaks speeds over 30MPH - speedometer driving gear installed backwards	23rd-26th	SC Vol. 27, No. 11, p. 49
Breather, Late Type oil loss - new design, relocated	23rd-24th	STB 51T-4, Dealer 3
Bushing Tools, Service description and illustration of use	23rd-24th	SC Vol. 24, No. 11, p. 50
Bushing Tools, Service description and illustration of use	23rd-55th	SC Vol. 28, No. 12, p. 65
Bushings and Bearings, Service part number reference	23rd-56th	SSB No. 355, p. 6
Bushings, Service now available for service - see SC Vol. 24, No. 11	23rd-24th	STB 50T-57, Dealer 44
Bushings, Service part number reference	23rd-24th	SC Vol. 24, No. 11, p. 52
Bushings, Service part number reference	23rd-55th	SC Vol. 28, No. 12, p. 70
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	STB 52T-5 (Zones only)
Changes in... (Confidential) production - with part, effective date/unit	26th	STB 53T-14 (Zones only)
Changes in... (Confidential) production - with part, effective date/unit	26th	STB 53T-3 (Zones only)
Changes in... converter pump broken, governor valve sticking - reactor shaft bearing kit, anodized governor parts	54th	STB 54T-11 (Zones only)
Clutch Housing Bushing Tools, 9-in. Converter new special tools	25th	SC Vol. 26, No. 8, p. 31
Control Assembly Part No. 423800 (exc. Gear Start) superceded part - exceptions	23rd-54th	SSB No. 338, p. 4
Control Valve: Changes to Improve Shift Pattern update to 56th Series - new valving kits	54th-55th	SC Vol. 30, No. 8, p. 29
Control Valve: Damper - New Type pulsation/flutter - new type valve	23rd-24th	SC Vol. 25, No. 8, p. 31
Control Valve: Plug Gauge Set special tool for 23rd Series, also for 24th - indentification chart	24th	SC Vol. 24, No. 10, p. 48
Control Valve: Torque-Tightening stuck valves - fluid/pressure leaks	23rd-56th	SC Vol. 30, No. 9, p. 35
Control Valve: Valve Body, Upper new production, die-cast - requires spring-type check valve	23rd-24th	SC Vol. 26, No. 7, p. 28
Converter: Application Chart part number reference - incl. flywheel	23rd-25th	SC Vol. 26, No. 4, p. 16
Converter: Assemblies - Balanced 9-in. type - service precautions	25th	SC Vol. 26, No. 9, p. 34
Converter: Corrosion Preventative in Replacements silica gel pack - remove	23rd-24th; (25th-56th)	SC Vol. 25, No. 4, p. 16
Converter: Fluid Leaks damaged washers - use of sealant	23rd-56th; 56J	SSB No. 350, p. 1
Converter: Inlet Pressure lower pressure in reverse	23rd-24th	SC Vol. 24, No. 12, p. 56
Converter: Outlet Valve check valve found - removal	24th	SC Vol. 25, No. 12, p. 46
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	SC Vol. 30, No. 5, p. 17
Converter: Pump Shaft - Oil Pump Rotor Splines - Worn or Stripped new 40-spline service parts	54th-55th-56th	SC 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 Shaft Bushing Clearance direct drive failure - excessive clearance	23rd-24th; (25th-55th)	SC Vol. 25, No. 8, p. 31
Converter: Reactor Shaft Bushing Installer Spacer 9-in. converter, shallower setting - new special tool	25th	SC Vol. 26, No. 8, p. 30
Converter: Reactor Shaft Thrust Bearing new type - superseded parts	26th-54th	SC Vol. 28, No. 6, p. 41
Converter: Reactor Shaft, Thrust Bearing new type - identification, service	26th	SC Vol. 27, No. 6, p. 29
Converter: Relief Valve eliminated in production - replace with plug	25th	SC Vol. 26, No. 7, p. 26
Converter: Retaining Screw Changes self-locking screws, special washers - torque spec	24th	STB 50T-55, Dealer 42
Converter: Torque new 9-in type - description	24th-25th	SC Vol. 26, No. 3, p. 11
Converter: Whine or Whistle oil flow, insufficient vane clearance - new style first turbine	25th	STB 52T-10 (Zones only)
Diagnosis basic procedure, pressure tests, adjustments	23rd; (24th-54th, exc. Gear Start)	SC Vol. 25, No. 11, p. 43
Diagnosis and Pressure Check Information (exc. Gear Start) direct drive clutch engagement - procedures	23rd-54th	SSB No. 338, p. 6
Direct Drive Clutch - see also: Diagnosis and Pressure Check Information	--	--
Direct Drive Clutch: 9-in.Converter does not engage - new type clutch piston	25th	SC Vol. 26, No. 12, p. 58
Direct Drive Clutch: Fails to Disengage engine stalling - enlarge governor oil vent	23rd-26th	STB 53T-4, Dealer 3
Direct Drive Clutch: Fails to Disengage engine stalling - governor modification	25th-54th	SC Vol. 28, No. 6, p. 42
Direct Drive Clutch: Piston Ring Gap, Checking precautions - specifications	23rd-24th; (25th-54th, exc. Gear Start)	SC Vol. 25, No. 4, p. 16
Direct Drive Clutch: Plate - 11-1/4 and 9-in. Diameter torsional disturbance, roar - new types, larger spring openings	23rd-26th	SC Vol. 27, No. 8, p. 38
Direct Drive Clutch: Plate - 9-in. Diameter torsional disturbance, roar - superseded part, larger spring openings	24th-26th	STB 53T-8 (Zones only)
Direct Drive Clutch: Plates - 11-1/4-in. torsional disturbance, with new style planetary dampers - enlarged spring openings	23rd-25th	STB 52T-20 (Zones only)
Direct Drive Clutch: Release - Gear Start slow/no release in drive - new governor and parking lock gear	54th	STB 54T-15 (Zones only)
Direct Drive Clutch: Slippage - Gear Start slipping due to oil - removal of chamfers	54th	SC Vol. 28, No. 10, p. 58
Direct Drive Clutch: Slippage retained oil - rework clutch facing chamfers	54th	SC Vol. 28, No. 10, p. 58
Disturbance in Reverse insufficient oil - rear pump check valve modification	25th	SC Vol. 26, No. 12, p. 58
Disturbance in Reverse oil restricted, aerated - enlarge check valve opening	25th	STB 52T-33, Dealer 24
Engine Runaway - Flare - Low Brake Information premature failure of high range clutch - summary of checks and corrections	54th-55th-56th	SC Vol. 30, No. 7, p. 25
Engine Runaway low range brake spring changes	54th-55th	STB 56T-2, Dealer 1
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)	SC Vol. 25, No. 10, p. 38
Filling Gear-Start Transmission suggested tool - fabrication	54th	SC Vol. 28, No. 10, p. 60
Flat Rate Manual, Changes in inspection and fluid change - sheets attached	24th-54th	STB 53T-24, Dealer 21
Fluid Drain Can new special tool - fluid filtering/reuse	23rd-24th; (25th-56th)	SC Vol. 25, No. 3, p. 12
Fluid Drain Period Revised increased - level check unchanged	23rd-24th	STB 50T-59, Dealer 46
Fluid Level, Checking converter outlet check valve eliminated - check within one minute	23rd-24th	STB 50T-61, Dealer 47
Fluid Temperature Affects...Upshift loss of pressure, bushing wear - pressure tests	54th-55th-56th; 56J	SSB No. 339, p. 5
Flywheel superseded parts - 9- and 11-1/4-in. converters	23rd-25th	SC Vol. 26, No. 4, p. 16
Flywheel Attaching Screws (Part Number - Correction) self-locking washers	23rd-25th	SC Vol. 26, No. 10, p. 39
Flywheel Attaching Screws discard old screws - use new self-locking type	23rd-25th	SC Vol. 26, No. 8, p. 32
Flywheel Housing Support Kit, Installing rework holes - shims	2401	SC Vol. 25, No. 4, p. 15
Flywheel Screw superceded part	23rd-24th	SSB No. 335, p. 7
Flywheel Screws part number correction	23rd-25th	SC Vol. 26, No. 10, p. 39
Forward Gears Inoperative, Transmission (exc. Gear Start) front pump relief valve sticking	23rd-54th	SSB No. 340, p. 4
Front Oil Pump - see also: Converter Pump Shaft	--	--
Front Oil Pump and Converter Shaft Kits new parts	54th-55th-56th	SC Vol. 30, No. 8, p. 32
Front Pump Relief Valve material conservation - oversized parts	26th	SC Vol. 27, No. 6, p. 29
Front Pump Relief Valve Spring Seat high range delay, sticking valve - new seat	24th	STB 51T-6, Dealer 5
Gear Shift Lower Bracket superseded parts	24th	SC Vol. 25, No. 12, p. 46
Governor Adaptor Screen - Ultramatic Drive governor sticking - filter added	24th	STB 51T-5, Dealer 4
Governor Cleaning Brushes new special tool - nylon	23rd; (24th-54th, exc. Gear Start)	SC Vol. 24, No. 10, p. 48
Governor Flyweight Ring Tool alternative tool - fabrication	23rd; (24th-54th, exc. Gear Start)	SC Vol. 24, No. 5, p. 18
Governor Housing and Inlet Valve governor rattle - venting changed	23rd-25th	SC Vol. 26, No. 10, p. 38
Governor Nylon Gears - Stripped driving or driven - torque tightening procedure	23rd-26th	SC Vol. 28, No. 6, p. 44
Governor Removal insufficient frame clearance - revised procedure	24th	SC Vol. 24, No. 9, p. 43
Governor Valves Sticking oil screen cleaning	23rd-24th; (25th-54th)	SC Vol. 25, No. 12, p. 48
Governor Vent Valve and Support sticking - improved design	23rd-25th	SC Vol. 26, No. 4, p. 16
Governors, Cleaning inspection, dressing, washing	23rd; (24th-54th, exc. Gear Start)	SC Vol. 24, No. 5, p. 18
High Range Clutch: (failures) operating precautions	56th; (54th-55th)	SC Vol. 30, No. 4, p. 16
High Range Clutch: 10 and 12 Plate Assemblies, Identifying visual indicators - parts interchange	23rd-25th	SC Vol. 25, No. 3, p. 12
High Range Clutch: Assembly lubrication improved - vent springs/holes eliminated	23rd-26th	SC Vol. 27, No. 9, p. 42
High Range Clutch: Lubrication and Operation production changes	25th	SC Vol. 26, No. 12, p. 59
High Range Clutch: Piston Ring Gap, Checking precautions - specifications	23rd-24th; (25th-54th, exc. Gear Start)	SC Vol. 25, No. 4, p. 16
High Range Clutch: Plates - Replacement use of new parts only	23rd-25th	STB 52T-21, Dealer 14
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	SSB No. 340, p. 5
Linkage Adjustments - see also: Throttle Control Rod Throttle Linkage Throttle Valve Lever	--	--
Linkage Adjustments new model information	24th	SC Vol. 24, No. 9, p. 44
Linkage Adjustments new model information	24th	STB 50T-33, Dealer 25
Linkage Adjustments selector, control valve, throttle - latest, updated procedures/special tools	23rd-26th	SC Vol. 27, No. 2, p. 7
Low and Reverse Bands reduced width - interchangeable	24th	SC Vol. 25, No. 12, p. 47
Low Range Drum to Reactor Clutch Housing Clearance specification increased	23rd-24th	SC Vol. 25, No. 6, p. 24
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 Speed Disturbance direct drive - alter shift point	54th-55th	SC Vol. 30, No. 2, p. 5
Measuring End Thrust Clearance revised procedure	24th	SC Vol. 25, No. 3, p. 12
Oil Leaks from flywheel housing - locating source	23rd-25th	SC Vol. 26, No. 12, p. 59
Oil Leaks past articles referenced	23rd-54th	SC Vol. 28, No. 10, p. 59
Oil Leaks, Starter Safety Switch gasket failure - installation assist	23rd-54th	SC Vol. 28, No. 6, p. 44
Oil Loss at Breather level, restrictions, overheating - relocation	23rd-56th; 56J	SSB No. 339, p. 3
Oil Loss Through Breather checks - rear housing passage, planetary oil ring, rear oil pump	24th	STB 50T-36, Dealer 28
Oil Pressure Changes production change - revised test specifications	23rd-25th	SC Vol. 27, No. 4, p. 21
Oil Screen governor/valves sticking - cleaning	23rd-24th; (25th-54th)	SC Vol. 25, No. 12, p. 48
Oil Seal Replacer - Rear Housing new special tool	24th	SC Vol. 25, No. 6, p. 24
Oil Seals damage, leaks - special tools, proper use	23rd-24th	SC Vol. 25, No. 10, p. 39
Operation - Coasting discouraged - high range clutch wear	23rd-25th	STB 52T-14, Dealer 10
Operation Under Emergency Conditions rocking, long pulls, steep grades - use low range	23rd-25th	STB 52T-6, Dealer 5
Park, Locking in pawl and gear clearance - loose, worn, damaged parts	54th-55th-56th	SSB No. 340, p. 4
Piston Ring Gap, Checking direct drive, high range clutches - specifications	23rd-24th; (25th-54th, exc. Gear Start)	SC Vol. 25, No. 4, p. 16
Planetary Assembly balanced - identification	26th	SC Vol. 27, No. 4, p. 21
Planetary Cage Damper low speed disturbance - backlash dampers added	24th	STB 51T-26, Dealer 22
Planetary Cage Damper low speed disturbance, backlash - new type	24th	SC Vol. 25, No. 9, p. 35
Planetary Cage Damper Installer new dampers - new special tool	24th	SC Vol. 25, No. 9, p. 36
Pump Check Valve Noise click/flutter - new type valve	23rd-24th	SC Vol. 26, No. 4, p. 15
Pump Check Valve Noise clicking, fluttering - new spring-type valve	23rd-24th	STB 52T-1, Dealer 1
Rear Housing Bearing Retainer Ring Pliers new special tool	24th	SC Vol. 25, No. 6, p. 24
Rear Oil Pump Driver premature wear - hardened	54th-55th-56th	STB 55T-47, Dealer 38
Rear Oil Pump Driver premature wear - redesigned	54th-55th-56th	SC Vol. 30, No. 1, p. 4
Rear Oil Pump Driver premature wear - redesigned	54th-55th-56th	STB 56T-9, Dealer 7
Rear Oil Pump Rotor Sets cost savings - new kits	54th-55th-56th	SC Vol. 30, No. 3, p. 11
Reverse Not Released - Tips From The Editor planetary ring gear bushing scored/seized - band adjustment, piston sticking	23rd-54th	SC Vol. 28, No. 8, p. 52
Reverse Piston Seal Retainer and Band Adjusting Screw high range clutch failure, dislocated seal - improved parts, same numbers	23rd-26th	SC Vol. 27, No. 11, p. 50
Serial Number new range - different speedometer drive gear	26th	SC Vol. 27, No. 4, p. 21
Serial Number unit reference chart - revised	26th	SC Vol. 27, No. 8, p. 35
Serial Number Correction - Die-Cast Valve Bodies starting numbers incorrect in STB 52T-1, Dealer 1	23rd-24th	SC Vol. 26, No. 6, p. 24
Service Information, Confidential - Gear Start slippage, no upshift, harsh downshift - low front pump pressure, low range brake orifice	54th	STB 54T-17 (Zones only)
Speedometer and Governor Driving Gears, Nylon production change - service replacement	26th	SC Vol. 27, No. 9, p. 41
Speedometer and Governor Gears, Nylon superseded steel parts	23rd-26th	SC Vol. 28, No. 7, p. 46
Speedometer Pinions and Adapters offset pinion bore - part number reference	23rd-54th	SC Vol. 28, No. 9, p. 54
Throttle Control Rod bent - length data	24th-54th	SC Vol. 28, No. 1, p. 3
Throttle Control Rod bent - length data	24th-55th	SC Vol. 29, No. 4, p. 26
Throttle Control Rod Adjustment bent - rod length data	24th-55th	SSB No. 340, p. 7
Throttle Control Rod Splasher binding linkage - snow/slush build-up	24th	SC Vol. 25, No. 2, p. 9
Throttle Cross Shaft to Carburetor Rod Tool special tool revised - 359-cid engine, modification	5406-13-26-31	SC Vol. 28, No. 2, p. 6
Throttle Linkage Adjustment Change high range clutch burning - revised procedure	24th	STB 51T-35, Dealer 31
Throttle Linkage Adjustment Change revised procedure	24th	SC Vol. 25, No. 14, p. 68
Throttle Linkage Adjustments supplement - corrections/variations	54th-55th-56th	SSB No. 340, p. 7
Throttle Valve and Timing Valve Kit engine runaway - improved design	23rd-26th	SC Vol. 27, No. 9, p. 40
Timing Valve Timing Pin - Revised excessive overlap low-to-high, cold - fabricating smaller pin	23rd-26th	SC Vol. 28, No. 6, p. 44
Torque Specifications revised - shop manual	24th-25th	SC Vol. 27, No. 4, p. 21
Transmission Lifting Tool new special tool - production change, modification for old tool	26th	SC Vol. 27, No. 9, p. 41
Transmission Removal - Warning 359-cid engine - heavy-duty air cleaner removal	5406-13-26-31	SC Vol. 28, No. 1, p. 3
Transmission, Service serial number suffix - updated parts	23rd-26th	SC Vol. 27, No. 2, p. 11
Transmissions, Service - Stripped shipped less bell housing	54th-55th	SC Vol. 29, No. 7, p. 37
Ultramatic Drive Tool suggested tool - assembly line-up arbor, fabrication	23rd; (24th-54th)	SC Vol. 24, No. 7, p. 28
Universal Joint Flange Bolt click, loosening - new type	54th-55th	SC Vol. 29, No. 9, p. 46
Universal Joint Flange Bolt click, loosening - new type	54th-55th	STB 55T-4, Dealer 4

SC = Service Counselor

SL = Service Letter

STB = Service Technical Bulletin

SSB = Studebaker Service Bulletin

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.

Disclosures & Disclaimers

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.

	';
Happy Thanksgiving and welcome to Packard Motor Car Information! If you're new here, please register for a free account.