Factory Changes

By Bob Westerman

 

This is a compiled list of factory changes made to CJs. This information was obtained from the following manuals. 1966 Universal Parts Book, 1949 CJ2A CJ3A Parts Book, 1965 Universal Service Manual, 1953 CJ3B Parts Book, and 1968 CJ2A CJ3A Revised Parts Book. For the sake of uniformity, the serial numbers listed in the database are the effective serial number of the change. The manuals sometimes specify effective numbers and other times list "up to" serial numbers. In the case of "up to" numbering, a 1 was added to the serial number to make it the effective number.
Group Effective Serial Number Engine Serial Number Model Engine Model Date Description of change Source Page Implied Notes
21,22 13453   CJ2A     Semi floating rear axle from full floating 1965 Universal Dispatcher Service Manual 214   lube chart p10 shows serial number 13413
17,18 24196   CJ2A     Drilled passages between transmission and transfer case for oil circulation 1965 Universal Dispatcher 14,184    
10   50705   L4   Piston head thickness from 3/16 to 1/4" 1965 Universal Dispatcher Service Manual 33    
10   3J161344   L4   Hardened exhaust valve seat inserts installed 1965 Universal Dispatcher Service Manual 41   also replacement CJ2A engine serial number RJ-297362
10   44417   L4   oil pump type change from planetary gear to internal rotor 1965 Universal Dispatcher Service Manual 43    
10   3J-166871   L4   timing gear oil jet from .070 to .040" 1965 Universal Dispatcher Service Manual 49    
10   175403 CJ2A L4   flywheel timing mark notations changed 1965 Universal Dispatcher Service Manual 51    
10   130859 CJ3A L4   timing marks moved to timing gear cover from flywheel 1965 Universal Dispatcher Service Manual 51    
15 30973 130859 CJ3A L4   4-1/2" starter motor (larger) floor mount foot starter switch 1965 Universal Dispatcher Service Manual 51,151,155    
10   130859 CJ3A L4   wider cylinder block flange (at previous timing hole location) 1965 Universal Dispatcher Service Manual 51    
10   All DJ3A L4   timing marks on timing gear cover 1965 Universal Dispatcher Service Manual 51    
10   4J200614   F4   Hardened exhaust valve seat inserts installed 1965 Universal Dispatcher Service Manual 75    
10       F4   with 4-1/2" starter new flywheel housing, rear eng plate and ring gear required 1965 Universal Dispatcher Service Manual 80    
10       F4   tapered flywheel attaching bolts replaced with straignt (drill out tapered holes) 1965 Universal Dispatcher Service Manual 82    
10   4J250095   F4   timing gear oil jet from .070 to .040" 1965 Universal Dispatcher Service Manual 84    
12 43965   CJ3B 57348     fuel tank wider, hold-down strap longer 1965 Universal Dispatcher Service Manual 109    
12 77001   CJ5 57548     fuel tank wider, hold-down strap longer 1965 Universal Dispatcher Service Manual 109    
12 14359   CJ6 57748     fuel tank wider, hold-down strap longer 1965 Universal Dispatcher Service Manual 109    
12 77983   CJ5 57548     fuel tank wider, hold-down strap longer 1965 Universal Dispatcher Service Manual 109    
15         1954 start of production a few Delco-Remy starter and distributors were used 1965 Universal Dispatcher Service Manual 122    
15   35523 CJ3B     key start, combinded gauges, 12v 1965 Universal Dispatcher Service Manual 126 1 from schematics
15   49249 CJ5     key start, 12v 1965 Universal Dispatcher Service Manual 128 1 from schematics
15   12578 CJ6     key start, 12v 1965 Universal Dispatcher Service Manual 128 1 from schematics
15     CJ5A     alternator 1965 Universal Dispatcher Service Manual 140    
15     CJ6A     alternator 1965 Universal Dispatcher Service Manual 140    
15 10253   CJ2A     headlight switch change to CJ3A style 1965 Universal Dispatcher Service Manual 156    
15     CJ3B     headlight switch change to CJ5 style 1965 Universal Dispatcher Service Manual 156    
15 178362   CJ2A     brush horn contact on column eliminated 1965 Universal Dispatcher Service Manual 161    
15     CJ3A     generator change from GDZ 4817 to GDZ 6001 1965 Universal Dispatcher Service Manual 165    
15     CJ2A     distributor change from IGW-4177-1 to IAD-4008 1965 Universal Dispatcher Service Manual 167 1  
15     CJ3A     distributor change from IAD-4008 to IAD-4008-T 1965 Universal Dispatcher Service Manual 167 1  
15     CJ3B     distributor change from IAD-4008-A to IAD-4008-AT 1965 Universal Dispatcher Service Manual 167 1  
15     CJ3B, CJ5     distributor change from IAD-4008-AT to IAD-4041 1965 Universal Dispatcher Service Manual 167 1  
15     CJ3B, CJ5, CJ6     distributor change from IAD-4041 to IAD-4012 1965 Universal Dispatcher Service Manual 167 1  
15     CJ3B, CJ5, CJ6, DJ3A     distributor change from IAD-4012 to IAD-4401 1965 Universal Dispatcher Service Manual 167 1  
12 77882   CJ5 57548     fuel tank return to narrow w/ short strap 1965 Universal Dispatcher Service Manual 109    
11 11645   CJ3B 56337     clutch control lever cover installed 1965 Universal Dispatcher Service Manual 171    
17 38222   CJ2A     cane shift transmission 1965 Universal Dispatcher Service Manual 177    
17 12606   DJ3A 56337     improved remote control shift rods 1965 Universal Dispatcher Service Manual 178    
20 22972   CJ2A     steering knuckle tie rod arm made integrally w/knuckle 1965 Universal Dispatcher Service Manual 203    
20 62488   CJ3A     frt axle drive pinion change, spacer eliminated 1965 Universal Dispatcher Service Manual 204    
20 37549   CJ3A     frt axle shaft outer end floats, not retained by nut and lockwasher 1965 Universal Dispatcher Service Manual 206    
20     CJ3A     eliminate lower king pin bearing shims 1965 Universal Dispatcher Service Manual 209    
23 16414   DJ3A 56337     steering gear change 1965 Universal Dispatcher Service Manual 232    
23 16660   DJ3A 56337     steering gear return to original style 1965 Universal Dispatcher Service Manual 232    
20 35326   CJ3B 57348     turning angle change 1965 Universal Dispatcher Service Manual 235   spicer axle shafts?
20 48248   CJ5 57548     turning angle change 1965 Universal Dispatcher Service Manual 235   spicer axle shafts?
20 12497   CJ6 57748     turning angle change 1965 Universal Dispatcher Service Manual 235   spicer axle shafts?
23 199079   CJ2A     bellcrank and mounting changed to 7/8" pin 1965 Universal Dispatcher Service Manual 235   also improved seals and ball faces up
26 44438   CJ5     frt spring reverse shackle and pivot 1965 Universal Dispatcher Service Manual 261    
26 11982   CJ6     frt spring reverse shackle and pivot 1965 Universal Dispatcher Service Manual 261    
31     CJ5   late new floor pan cover plate w/ oval bubble 1965 Universal Dispatcher Service Manual 269    
31     CJ6   late new floor pan cover plate w/ oval bubble 1965 Universal Dispatcher Service Manual 269    
10           cylinder head change 1949 CJ2A, CJ3A parts 18    
10   44418       timing gear oil jet added, oil slinger gasket deleted 1949 CJ2A, CJ3 18, 19    
10   165477       from chain to gear driven camshaft 1949 CJ2A, CJ3 19,25   also changed, oil pump (Eaton), timing cover. 1968 revised parts lists the engine number for change as 44418
10   178217       starter crank nut replace with regular nut 1949 CJ2A, CJ3 19,20    
10   54101       crankshaft front packing replaced with seal 1949 CJ2A, CJ3 20    
10   190235       crankshaft pulley change 1949 CJ2A, CJ3 20    
10   89738       connecting rod bolt change from 7/16 to 3/8" 1949 CJ2A, CJ3 21    
10   89012       shorter valve spring cover bolts 1949 CJ2A, CJ3 23    
10   163076       oil pump change from Eaton to aluminum body 1949 CJ2A, CJ3 26    
10   40353       oil filter change to Purolator or un-named filter 1949 CJ2A, CJ3 26    
10           oil filter change to Fram 1949 CJ2A, CJ3 26   no serial number listed
10   57295       oil distribution elbows changed 1949 CJ2A, CJ3 27    
10   148680       intake manifold change 1949 CJ2A, CJ3 29    
10           intake manifold plug and stud changes 1949 CJ2A, CJ3 29   no serial number listed
10   200202       Heat control valve (heat riser) spring change 1949 CJ2A, CJ3 29    
10   164506       engine stay cable attachment hardware change 1949 CJ2A, CJ3 30    
10   41781 CJ2A     front insulator (motor mount) change 1949 CJ2A, CJ3 30    
10   44418 CJ2A     front engine plate change 1949 CJ2A, CJ3 31    
10   49298 CJ2A     rear engine plate change 1949 CJ2A, CJ3 31    
10     CJ2A, all CJ3A     rear engine plate change 1949 CJ2A, CJ3 31   no serial number listed
11 14127         clutch lever and tube assy change 1949 CJ2A, CJ3 33    
11 179771         clutch pedal assy change 1949 CJ2A, CJ3 33    
11 141459         clutch control cotter pin eliminated 1949 CJ2A, CJ3A parts 35    
12 50000         fuel line clip (front floor sill) change 1949 CJ2A, CJ3A parts 36    
12 69590   CJ2A     Carburetor change, use Novi governor only 1949 CJ2A, CJ3A parts 36,37   was King Seeley and Monarch gov. only
12 212111   CJ2A, all CJ3A     Carburetor change Carter 636-SA 1949 CJ2A, CJ3A parts 39    
12 49697         gasket (for restrictor plate) 1949 CJ2A, CJ3A parts 39    
12 69590         plug for vacuum control vent 1949 CJ2A, CJ3A parts 39    
12 45985         Oakes air cleaner 1949 CJ2A, CJ3A parts 39    
12           Air horn change 1949 CJ2A, CJ3A parts 40   no serial number listed
13 18639         Exhaust system change 1949 CJ2A, CJ3A parts 46,47   rear muffler?
14     CJ3A     change to side mount radiator, rad. hoses change, grille change also 1949 CJ2A, CJ3A parts 48   no serial number listed
14 170065   CJ2A     radiator hose connecting tubes eliminated 1949 CJ2A, CJ3A parts 49    
14 97741   CJ2A     radiator guard change (grille) 1949 CJ2A, CJ3A parts 49   park light change?
15 37218         brace, generator change 1949 CJ2A, CJ3A parts 50    
15 46479   CJ2A     ign coil mounted to engine 46479-50800 and 50901-51184 inclusive 1949 CJ2A, CJ3A parts 52    
15           spark plug wire set change 1949 CJ2A, CJ3A parts 52   no serial number listed
15 178362   CJ2A     horn button cable added 1949 CJ2A, CJ3A parts 52    
15     CJ2A     clip added 1949 CJ2A, CJ3A parts 53   no serial number listed
15     CJ2A     clip deleted 1949 CJ2A, CJ3A parts 53   no serial number listed
15 47100   CJ2A     connector change 1949 CJ2A, CJ3A parts 53    
15 47100   CJ2A     Harness,body wiring, long changed 1949 CJ2A, CJ3A parts 53    
15 51229   CJ2A     Harness,body wiring, long changed 1949 CJ2A, CJ3A parts 54    
15 75449   CJ2A     Harness,body wiring, long changed 1949 CJ2A, CJ3A parts 54    
15 97441   CJ2A     Harness,body wiring, long changed 1949 CJ2A, CJ3A parts 54    
15 116422   CJ2A     Harness,body wiring, long changed 1949 CJ2A, CJ3A parts 54    
15 178362   CJ2A     Harness,body wiring, long changed 1949 CJ2A, CJ3A parts 54   horn contact brush removed from steering column
15     CJ2A     harness, body wiring, right side change 1949 CJ2A, CJ3A parts 54   no serial number listed
15 51229   CJ2A     chassis wiring change 1949 CJ2A, CJ3A parts 54    
15 75449   CJ2A     chassis wiring change 1949 CJ2A, CJ3A parts 54    
15 219466   CJ2A     chassis wiring change 1949 CJ2A, CJ3A parts 54    
15 32434         lamp, highbeam telltale 1949 CJ2A, CJ3A parts 57   use after serial no 32433
15 97741         lamp, parking light 1949 CJ2A, CJ3A parts 57   use after serial no 97740
15 158111         headlight attachment screw change 1949 CJ2A, CJ3A parts 57    
15 38688         headlight door changed from black to chrome 1949 CJ2A, CJ3A parts 58    
15 45681         parking light change 1949 CJ2A, CJ3A parts 58   change to chrome door
15 97741         parking light change 1949 CJ2A, CJ3A parts 58   change to later grille w/integral light
15 209952         light, tail and stop change door black to chrome 1949 CJ2A, CJ3A parts 59   different serial # for black to chrome change???
15           light, tail and stop change 1949 CJ2A, CJ3A parts 59   no serial number listed
15 209952         bracket, tail and stop light added part 1949 CJ2A, CJ3A parts 60    
15 45724         door and lens change black to chrome 1949 CJ2A, CJ3A parts 60   different serial # for black to chrome change???
15 209952         housing, tail and stop change 1949 CJ2A, CJ3A parts 60   different serial # for black to chrome change???
15           housing, tail and stop change 1949 CJ2A, CJ3A parts 60   no serial number listed
15 116422         light,IP, assy changed 1949 CJ2A, CJ3A parts 60    
15 116422         wire, lead, IP, assy changed 1949 CJ2A, CJ3A parts 60    
15 116422         switch, IP light, assy part deleted 1949 CJ2A, CJ3A parts 60    
15 219466         switch, stop light, assy changed 1949 CJ2A, CJ3A parts 61    
15 47100         block, junction, headlight change 2 post to 3 post 1949 CJ2A, CJ3A parts 61    
15 13909         horn change 1949 CJ2A, CJ3A parts 61   2 manufacturers possible after change
15 51229         horn bracket and mount bolt change dash to fender 1949 CJ2A, CJ3A parts 61,62    
15 191721         horn and bracket changed 1949 CJ2A, CJ3A parts 61   3 manufacturers possible after change
15 178361         brush, contact, horn wire deleted 1949 CJ2A, CJ3A parts 62    
15 67922         reflector change balck to chrome 1949 CJ2A, CJ3A parts 63    
17 24197         transmission change 1949 CJ2A, CJ3A parts 64    
17 38222         transmission change to cane shift, and some internal changes 1949 CJ2A, CJ3A parts 64,67,69    
17 24197         internal transmission parts change 1949 CJ2A, CJ3A parts 67    
17 67495         plate, lock, idler, rear gasket and countershaft change 1949 CJ2A, CJ3A parts 67,69    
17 77759         ball change 1949 CJ2A, CJ3A parts 68   shift knob change??
17 11826         shift linkage lube fitting change 1949 CJ2A, CJ3A parts 69    
18 24197         transfer case change 1949 CJ2A, CJ3A parts 69    
18 67495         transfer case change 1949 CJ2A, CJ3A parts 69    
18 24197         transfer case idler gear, shaft and bearing change 1949 CJ2A, CJ3A parts 71    
19 13454         rear prop. Shaft change 1949 CJ2A, CJ3A parts 73    
20 22973         frt axle steering arms moved from king pin cap to steering knuckle 1949 CJ2A, CJ3A parts 76    
21,22 13454   CJ2A     rear axle change to semi floating 1949 CJ2A, CJ3A parts 80,81,82   model 23 to 41
23 199080         steering bellcrank, bearing and bracket change 1949 CJ2A, CJ3A parts 83,84    
23 199080         drag link change 1949 CJ2A, CJ3A parts 84    
23 22973         tie rods length change 1949 CJ2A, CJ3A parts 84    
23 38222   CJ2A     steering gear change 1949 CJ2A, CJ3A parts 85   end of remote shifter
23 178362   CJ2A     steering gear change, housing and internal parts 1949 CJ2A, CJ3A parts 85, 86    
24 183499         emergency brake handle, ratchet and cable change 1949 CJ2A, CJ3A parts 86    
24 44305         emergency brake handle change black to chrome 1949 CJ2A, CJ3A parts 87    
24 13454         rear backing plate to axle bolt length change 1949 CJ2A, CJ3A parts 89    
24 215650   CJ2A     master cylinder change cast iron to aluminum 1949 CJ2A, CJ3A parts 91,92    
24 196663         internal master cylinder changes 1949 CJ2A, CJ3A parts 92    
24 13454         brake lines, brackets, clips change 1949 CJ2A, CJ3A parts 92,93    
24 215650         brake line and clip change 1949 CJ2A, CJ3A parts 92,93    
24 11826         brake pedal lube fitting change 1949 CJ2A, CJ3A parts 93   brake pedal arm
24 179771         pad, brake pedal, assy. Change 1949 CJ2A, CJ3A parts 93    
25 168643         lug nut change 1949 CJ2A, CJ3A parts 94    
25 13453         rear hub and drum change 1949 CJ2A, CJ3A parts 95   23 to 41 axle
25 13453         rear wheel bearing change 1949 CJ2A, CJ3A parts 95    
26 199080   CJ2A     frame change, bell crank bracket different 1949 CJ2A, CJ3A parts 97    
26 215650   CJ2A     frame change, revised to accommodate inverted steering bell crank 1949 CJ2A, CJ3A parts 97    
26     CJ3A     frame change to bottom mount radiator 1949 CJ2A, CJ3A parts 97   no serial number listed
27 169924         HD springs change 1949 CJ2A, CJ3A parts 99   lengths of leafs for HD springs
27 13454         rear spring clip change 1949 CJ2A, CJ3A parts 101    
27 11826         rear spring lube fitting change 1949 CJ2A, CJ3A parts 101    
27 13454         spring u-bolt plates change 1949 CJ2A, CJ3A parts 101    
27 178937         spacer, front axle bumper added to provide clearance when Monroe lift pump is used 1949 CJ2A, CJ3A parts 101    
27 215650         spacer, front axle bumper eliminated 1949 CJ2A, CJ3A parts 101    
27 106806         spacer, rear axle bumper to frame eliminated 1949 CJ2A, CJ3A parts 101    
28 178937         shock change 1949 CJ2A, CJ3A parts 101    
28 199080         shock change 1949 CJ2A, CJ3A parts 101    
28 215650         shock change 1949 CJ2A, CJ3A parts 101    
29 215650         front fender attachment hardware change 1949 CJ2A, CJ3A parts 101    
29 215650         anti-squeak, frt fender splash apron to frame eliminated 1949 CJ2A, CJ3A parts 101    
29 129807   CJ2A all CJ3A     Body step added 1949 CJ2A, CJ3A parts 102    
29 133107   CJ2A all CJ3A     Body step attachment hardware change 1949 CJ2A, CJ3A parts 102    
31 38222   CJ2A     Body change for cane shift 1949 CJ2A, CJ3A parts 102,106,109    
31 176062   CJ2A     Spare moved to left side 1949 CJ2A, CJ3A parts 102,107,108   body changed
31 185770   CJ2A     Spare moved to right side 1949 CJ2A, CJ3A parts 102    
31     CJ2A     nut, spare wheel to carrier stud changed 1949 CJ2A, CJ3A parts 109   no serial number listed
31 15305   CJ2A     windshield changes 1949 CJ2A, CJ3A parts 109    
31 154884   CJ2A     windshield pivot bolt change 1949 CJ2A, CJ3A parts 110,111    
31 148680         wiper vacuum fitting change 1949 CJ2A, CJ3A parts 111    
31 10557   CJ2A     outside rear view morror mounting hardware change 1949 CJ2A, CJ3A parts 111    
32 215650         bar, frt bumper and hardware changed 1949 CJ2A, CJ3A parts 112    
33 168643         lug wrench change from 3/4 to 13/16" 1949 CJ2A, CJ3A parts 112    
10   190235       crankshaft pulley change to twin groove 1968 revised parts list      
10   163076       spring, oil relief plunger 1968 revised parts list      
10   164506       engine stay cable lock washer eliminated 1968 revised parts list      
11 141459         pedal shaft washers eliminated 1968 revised parts list      
30 193801   CJ2A all CJ3A     trough, drain, hood hinge added 1968 revised parts list      
10     CJ3B     crankcase ventilator nipple added 1953 CJ3B parts 21   no serial number listed
15     CJ3B     voltage regulator change 1953 CJ3B parts 42   no serial number listed
20     CJ3B     changes in Rzeppa frt. Axles 1953 CJ3B parts 63   no serial number listed
35     CJ3B     turn signal kit change 1953 CJ3B parts 118,119   no serial number listed
10   4J174312       cylinder head nipple replace with plug 1966 Universal parts 29    
10   4J142360       oil filler tube change 1966 Universal parts 38    
10   3J158187       bellhousing change 1966 Universal parts 42    
10   4J142035       bellhousing change 1966 Universal parts 42    
14   4J174313       bypass hose, nipple and clamps eliminated 1966 Universal parts 65,66    
14   4J174312       water pump change 1966 Universal parts 66    
15 57348-34453   CJ3B     wiring change 1966 Universal parts 85    
15 57548-38242   CJ5     wiring change 1966 Universal parts 85    
15 57748-10647   CJ6     wiring change 1966 Universal parts 85    
15 57348-44200   CJ3B     park light change 1966 Universal parts 88    
15 57548-73568   CJ5     park light change 1966 Universal parts 88    
15 57748-14190   CJ6     park light change 1966 Universal parts 88    
15 57348-35523   CJ3B     KS to SW instrument change 1966 Universal parts 95,97    
15 57548-49249   CJ5     KS to SW instrument change 1966 Universal parts 95,97    
15 57748-12578   CJ6     KS to SW instrument change 1966 Universal parts 95,97    
15 57348-39839   CJ3B     SW 6v to SW 6 and 12 v instrument change 1966 Universal parts 95,97    
15 57548-61686   CJ5     SW 6v to SW 6 and 12 v instrument change 1966 Universal parts 95,97    
15 57748-13411   CJ6     SW 6v to SW 6 and 12 v instrument change 1966 Universal parts 95,97    
17 57348-93448   CJ3B     T90 transmission change 1966 Universal parts 100    
17 57548-151237   CJ5     T90 transmission change 1966 Universal parts 100    
17 57748-23458   CJ6     T90 transmission change 1966 Universal parts 100    


Last Updated on 12/16/2003
By Bob