How to identify your XJ axle and the original gear ratio

I found the following information on-line and have never seen it posted here. There are frequently questions about "what axle do I have?", so i though that I'd just post the relevant data to get the job done.

ONCE YOU HAVE LOCATED THE PART NUMBER AND AXLE CODE, YOU CAN USE THE DATA BELOW TO IDENTIFY WHAT YOU HAVE (or had before someone re-geared it)

• 
  
  This code... means this axle... with this number of bolts holding the cover on... with this general differential housing shape... with this size ring gear... with these notes... Photo, diagram, sketch or cave drawing of the axle housing, cover or cover gasket. 20 Dana 20 rear axle Cover is very round when viewed from the back. VERY rare in early MJ's. Primarily found on CJ's, etc.
  
  
  30 Dana 30 front axle 10 bolt cover Round with flattened vertical cover sides. 7.56 inches Threaded plug to fill differential with oil.
  
  
  35 Dana 35 rear axle 10 bolt cover Rounded housing cover. Looks like it's been 'mashed' down from the top. Plastic plug to fill differential w/ oil.
  
  
  8-1/4 Chrysler 8.25 inch rear axle 10 bolt cover Rounded housing cover with flattened housing bottom Plastic plug to fill differential w/ oil.
  
  
  44 Dana 44 rear axle 10 bolt cover Angular cover and housing. 8.5 inches Primarily found in late 80's XJ's with towing package. MJ versions have spring perches on bottom. Threaded fill plug.
  
  OEM / Factory Differential Types NL Non-Limited Slip differential ('open' differential) ALL OEM front differentials. Most common for rear regardless of axle manufacturer. L or LS Limited Slip differential Each part number group contains axle information from the three most recent eras of Jeep history: AMC / JEEP, Chrysler / Jeep, & Daimler-Chrysler. There is some overlap - you'll find AMC designations carried on into Chrysler production years.
• 8 Digit codes beginning with "5" are Daimler-Chrysler numbers.
• 10 digit codes beginning with "8" are AMC / Chrysler Codes prior to Daimler-Benz.

1984 - 1986 AMC / JEEP codes:

PART # CODE YEAR FOUND ON THESE VEHICLES AXLE TYPE RATIO DIFFERENTIAL TYPE E 1986 Cherokee, Wagoneer & Comanche 35 3.54 NL K 1986 Cherokee, Wagoneer & Comanche 35 4.11 NL KK 1986 Cherokee, Wagoneer & Comanche 35 4.11 LS S 1984 - 85 Cherokee & Wagoneer 35 3.73 NL T 1984 - 86 Cherokee, Wagoneer & Comanche 35 3.31 NS SS 1984 - 85 Cherokee & Wagoneer 35 3.73 LS TT 1984 - 85 Cherokee & Wagoneer 35 3.31 LS

• 1991-1997 Daimler-Chrysler codes:
• PART # CODE - YEAR - VEHICLE - AXLE TYPE - RATIO - DIFFERENTIAL TYPE
• 52008613 '95-96 Cherokee 35 3.73 NL
• 52009401 '94 Cherokee 35 3.73 NL
• 52037658 '91-93 Cherokee 35 3.55 NL
• 52060009 '95 Cherokee 8-1/4 4.10 L
• 52067357 '91-93 Cherokee 35 3.55 L A.B.S.
• 52067662 '91-93 Cherokee 30 3.55 NL w/o disconnect axle
• 52067663 '91-93 Cherokee & Comanche 30 4.10 NL w/o disconnect axle
• 52067664 '91-93 Cherokee & Comanche 30 3.07 NL w/o disconnect axle
• 52067690 '92-93 Cherokee 8-1/4 3.55 NL
• 52067694 '91-93 Cherokee 35 3.07 NL
• 52067695 '91-93 Cherokee 35 3.07 L
• 52067696 '91-93 Cherokee 35 3.55 L A.B.S.
• 52067697 '91-93 Cherokee 35 3.55 NL
• 52067698 '91-93 Cherokee 35 3.55 L A.B.S.
• 52067699 '91-93 Cherokee 35 3.55 NL
• 52067761 '91-93 Cherokee & Comanche 30 3.55 NL w/o disconnect axle
• 52067968 '91-93 Cherokee 30 3.55 NL w/o disconnect axle, R.H.D.
• 52068012 '91-92 Comanche 35 3.07 NL
• 52068027 '92-93 Cherokee 8-1/4 3.55 NL
• 52068047 '91-93 Cherokee & Comanche 30 3.07 NL w/o disconnect axle
• 52068048 '91-93 Cherokee & Comanche 30 4.10 NL w/o disconnect axle
• 52068051 '91-93 Cherokee 30 3.55 NL w/o disconnect axle, R.H.D.
• 52068054 '91-93 Cherokee 30 4.10 NL w/o disconnect axle, R.H.D.
• 52068070 '91-93 Cherokee 35 3.55 L
• 52068071 '91-93 Cherokee 35 3.07 L
• 52068073 '91-93 Cherokee 35 4.11 NL
• 52068074 '91-93 Cherokee 35 3.55 NL
• 52068077 '91-93 Cherokee 35 3.55 NL
• 52068078 '91-93 Cherokee 35 3.07 NL
• 52068141 '91-93 Cherokee 35 3.73 NL
• 52068264 '91-93 Cherokee 30 3.55 NL w/o disconnect axle
• 52068265 '91-95 Cherokee 35 3.55 NL
• 52068266 '91-96 Cherokee 35 3.55 L
• 52068366 '94 Cherokee 8-1/4 3.55 NL
• 52068368 '94-96 Cherokee 8-1/4 4.10 NL
• 52068421 '94-96 Cherokee 30 3.07 NL w/o disconnect axle
• 52068423 '94-96 Cherokee 30 3.55 NL w/o disconnect axle
• 52068424 '94-96 Cherokee 30 4.10 NL w/o disconnect axle
• 52068425 '94-95 Cherokee 30 3.55 NL w/o disconnect axle
• 52068517 '94-96 Cherokee 30 3.07 NL w/o disconnect axle
• 52068559 '94-96 Cherokee 30 3.55 NL w/o disconnect axle, R.H.D.
• 52068560 '94-96 Cherokee 30 3.55 NL w/o disconnect axle, R.H.D.
• 52068564 '94-96 Cherokee 30 4.10 NL w/o disconnect axle, R.H.D.
• 52068634 '91-93 Cherokee & Comanche 30 3.07 NL w/o disconnect axle
• 52068641 '91-93 Cherokee & Comanche 30 3.07 NL w/o disconnect axle
• 52068642 '91-93 Cherokee & Comanche 30 3.55 NL w/o disconnect axle
• 52068643 '91-93 Cherokee & Comanche 30 4.10 NL w/o disconnect axle
• 52068668 '94-96 Cherokee 8-1/4 3.07 NL
• 52068669 '94-96 Cherokee 8-1/4 3.07 L
• 52068670 '94-96 Cherokee 8-1/4 4.10 NL
• 52068671 '94-95 Cherokee 8-1/4 4.10 L
• 52068675 '94-96 Cherokee 35 3.55 L
• 52068679 '94-95 Cherokee 35 3.07 L
• 52068688 '94-96 Cherokee 35 4.11 L
• 52068689 '94-95 Cherokee 35 4.11 NL
• 52068700 '94-95 Cherokee 35 3.55 NL
• 52068714 '94-95 Cherokee 35 3.55 L
• 52068721 '94-95 Cherokee 35 3.55 NL
• 52068728 '94-95 Cherokee 35 3.55 NL
• 52068740 '94-96 Cherokee 35 3.07 NL
• 52068741 '94-96 Cherokee 35 3.07 NL
• 52068742 '94-95 Cherokee 35 3.07 L
• 52068743 '94-95 Cherokee 35 3.55 L
• 52068744 '94-95 Cherokee 35 3.55 NL
• 52068749 '94 Cherokee 8-1/4 3.55 NL
• 52068800 '94 Cherokee 8-1/4 3.55 L
• 52069008 '94-96 Cherokee 8-1/4 3.07 L
• 52069193 '95-97 Cherokee 30 3.07 NL w/o disconnect axle
• 52069194 '95-97 Cherokee 30 3.55 NL w/o disconnect axle
• 52069195 '95-97 Cherokee 30 4.10 NL w/o disconnect axle
• 52069196 '95-97 Cherokee 30 3.73 NL w/o disconnect axle
• 52069197 '95-97 Cherokee 30 3.55 NL w/o disconnect axle
• 52069198 '95-97 Cherokee 30 3.07 NL w/o disconnect axle
• 52069199 '95-97 Cherokee 30 3.55 NL w/o disconnect axle, R.H.D.
• 52069200 '95-97 Cherokee 30 3.55 NL w/o disconnect axle, R.H.D.
• 52069201 '95-97 Cherokee 30 4.10 NL w/o disconnect axle, R.H.D.
• 52069227 '95 Cherokee 8-1/4 3.55 NL
• 52069229 '94-95 Cherokee 8-1/4 3.07 NL
• 52069230 '94-96 Cherokee 8-1/4 3.07 L
• 52069231 '94-96 Cherokee 8-1/4 4.10 NL
• 52069232 '94-96 Cherokee 8-1/4 4.10 L
• 52069233 '95 Cherokee 8-1/4 3.55 NL
• 52069235 '94-96 Cherokee 8-1/4 4.10 NL
• 52069236 '94-96 Cherokee 8-1/4 4.10 L
• 52069600 '94-96 Cherokee 35 4.11 L
• 52069603 '95 Cherokee 8-1/4 3.55 NL
• 52069605 '95 Cherokee 8-1/4 3.55 NL
• 52069780 '94-96 Cherokee 35 3.73 NL
• 52069781 '94-96 Cherokee 35 3.73 NL
• 52069785 '94-96 Cherokee 35 3.07 L
• 52069786 '94-96 Cherokee 35 4.11 L
• 52069787 '94-96 Cherokee 35 4.11 L
• 52069799 '96 Cherokee 35 3.07 L
• 52070012 '94-96 Cherokee 30 3.55 NL w/o disconnect axle
• 52070013 '94-96 Cherokee 30 3.73 NL w/o disconnect axle
• 52070047 '94-95 Cherokee 8-1/4 3.55 L
• 52070048 '94-95 Cherokee 8-1/4 4.10 L
• 52070062 '95-96 Cherokee 8-1/4 4.10 L
• 52098930 '96 Cherokee 8-1/4 3.55 NL
• 52098931 '96 Cherokee 8-1/4 3.55 L
• 52098932 '96 Cherokee 8-1/4 4.10 NL
• 52098933 '96 Cherokee 8-1/4 3.07 NL
• 52099457 '97 Cherokee 35 3.55 L
• 52099458 '97 Cherokee 35 3.55 L
• 52099459 '97 Cherokee 35 3.07 L
• 52009460 '97 Cherokee 35 3.73 L
• 52099467 '97 Cherokee 35 3.73 NL
• 52099468 '97 Cherokee 35 3.73 L
• 52009473 '97 Cherokee 35 3.55 NL
• 52009474 '97 Cherokee 35 3.07 NL
• 53005574 '90 Cherokee, Wagoneer & Comanche 30 3.07 NL disconnect axle
• 53005575 '90 Cherokee, Wagoneer & Comanche 30 3.07 NL disconnect axle
• 53005576 ’90-93 Cherokee, Wagoneer & Comanche 30 3.55 NL disconnect axle
• 53005577 '90 Cherokee, Wagoneer & Comanche 30 4.10 NL disconnect axle
• 53005578 '90 Cherokee, Wagoneer & Comanche 30 4.10 NL disconnect axle
• 53005579 '90 Cherokee, Wagoneer & Comanche 30 4.56 NL disconnect axle
• 53005580 ’90-93 Cherokee, Wagoneer & Comanche 30 3.55 NL w/o disconnect axle
• 53005581 '90-93 Cherokee, Wagoneer & Comanche 30 3.55 NL w/o disconnect axle
• 53005582 '90-93 Cherokee, Wagoneer & Comanche 30 3.55 NL w/o disconnect axle, A.B.S.
• 53005584 '90 Cherokee & Wagoneer 35 3.07 NL
• 53005585 '90 Cherokee & Wagoneer 35 3.55 NL
• 53005586 '90 Cherokee & Wagoneer 35 3.55 L
• 53005587 '90-93 Cherokee & Wagoneer 35 3.55 NL A.B.S.
• 53005588 '90-93 Cherokee & Wagoneer 35 3.55 L A.B.S.
• 53005589 '90 Cherokee & Wagoneer 35 3.55 NL
• 53005590 '90 Cherokee & Wagoneer 35 4.11 NL
• 53000591 '90 Cherokee & Wagoneer 35 4.11 L
• 53005592 '90 Cherokee & Wagoneer 35 4.56 NL
• 53005982 '90 Cherokee & Wagoneer 35 3.07 L
• 53008596 '90 Comanche 35 3.07 NL
• 53008597 '90 Comanche 35 3.55 NL
• 53008598 '90 Comanche 35 4.11 NL
• 53008599 '90 Comanche 35 4.56 NL
• 53008601 '91-92 Comanche 44 3.07 NL
• 53008602 '91-92 Comanche 44 3.07 L
• 53008603 '91-92 Comanche 44 3.54 NL
• 53008604 '91-92 Comanche 44 3.54 L
• 53008605 '91-92 Comanche 44 4.10 NL
• 53008657 '90 Cherokee & Wagoneer 35 4.11 L
• 53008657 '91-93 Cherokee 35 4.11 L
• 53008658 '90-93 Cherokee & Wagoneer 35 3.07 L
• 53008659 '90-93 Cherokee & Wagoneer 35 3.55 L
• 53009321 '91-93 Cherokee & Comanche 30 3.07 NL disconnect axle
• 53009322 '91.93 Cherokee 30 3.07 NL disconnect axle
• 53009323 '91.93 Cherokee & Comanche 30 3.55 NL disconnect axle
• 53009324 '91.93 Cherokee & Comanche 30 4.10 NL disconnect axle
• 53009325 '91-93 Cherokee 30 4.10 NL disconnect axle
• 53009804 '91-93 Cherokee 35 3.07 NL
• 53009805 '91-93 Cherokee 35 3.55 NL
• 53009806 '91-93 Cherokee 35 4.11 NL
• 53009808 '91-93 Cherokee 35 3.55 NL
• 53009809 '91-92 Comanche 35 3.55 NL
• 53009810 '91-92 Comanche 35 4.11 NL

• 1984 - 1990 AMC / Chrysler codes (pre Daimler-Benz)
• PART # CODE - YEAR - VEHICLE - AXLE TYPE - RATIO - DIFFERENTIAL TYPE
• 8953000393 '86-87 Cherokee, Wagoneer & Comanche 30 3.54 NL disconnect axle
• 8953000394 '86-89 Cherokee, Wagoneer & Comanche 30 4.10 NL disconnect axle
• 8953000395 '84-85 Cherokee & Wagoneer 30 3.73 NL disconnect axle
• 8953000396 '84-85 Cherokee & Wagoneer 30 3.73 NL disconnect axle
• 8953000930 '86-89 Cherokee, Wagoneer & Comanche 30 3.07 NL disconnect axle
• 8953000931 '84-85 Cherokee & Wagoneer 30 3.31 NL disconnect axle
• 8953000932 '84-87 Cherokee, Wagoneer & Comanche 30 3.31 NL disconnect axle
• 8953001214 '84-85 Cherokee & Wagoneer 30 3.31 NL disconnect axle
• 8953001215 '84-85 Cherokee & Wagoneer 30 3.31 NL disconnect axle
• 8953001218 '84-85 Cherokee & Wagoneer 30 3.31 NL disconnect axle
• 8953001219 '84-85 Cherokee & Wagoneer 30 3.31 NL disconnect axle
• 8953001326 '84-85 Cherokee & Wagoneer 30 3.31 NL w/o disconnect axle
• 8953001327 '84-85 Cherokee & Wagoneer 30 3.31 NL w/o disconnect axle
• 8953001364 '84-85 Cherokee & Wagoneer 30 3.31 NL w/o disconnect axle
• 8953001366 '84-85 Cherokee & Wagoneer 30 3.73 NL w/o disconnect axle
• 8953002091 '84-85 Cherokee & Wagoneer 30 3.31 NL w/o disconnect axle
• 8953002092 '84-85 Cherokee & Wagoneer 30 3.31 NL w/o disconnect axle
• 8953002093 '84-85 Cherokee & Wagoneer 30 3.31 NL w/o disconnect axle
• 8953002094 '84-85 Cherokee & Wagoneer 30 3.73 NL w/o disconnect axle
• 8953003071 '87-90 Comanche 44 4.10 NL
• 8953003427 '87 Cherokee & Wagoneer 35 3.55 L
• 8953003435 '86-87 Cherokee, Wagoneer & Comanche 30 3.54 NL w/o disconnect axle
• 8953003436 '86-87 Cherokee, Wagoneer & Comanche 30 4.10 NL w/o disconnect axle
• 8953003497 '86-89 Cherokee, Wagoneer & Comanche 30 4.56 NL disconnect axle
• 8953003514 '87-89 Cherokee & Wagoneer 35 3.08 L
• 8953003516 '87-89 Cherokee & Wagoneer 35 3.08 NL
• 8953003692 '86 Cherokee & Wagoneer 35 3.54 NL
• 8953003693 '86-89 Cherokee & Wagoneer 35 4.11 L
• 8953003695 '86-89 Cherokee & Wagoneer 35 4.11 NL
• 8953003697 '86 Comanche 35 3.54 NL
• 8953003698 '86 Comanche 35 4.11 L
• 8953003699 '86 Comanche 35 4.11 NL
• 8953003700 '86-87 Comanche 44 4.10 L
• 8953003701 '86-87 Comanche 44 4.10 NL
• 8953004043 '86 Cherokee & Wagoneer 35 3.31 NL
• 8953004045 '86 Comanche 35 3.31 NL
• 8953004215 '86 Cherokee & Wagoneer 35 3.31 NL
• 8953004216 '86 Cherokee & Wagoneer 35 3.54 NL
• 8953004217 '86 Cherokee & Wagoneer 35 4.11 NL
• 8953004218 '86 Cherokee & Wagoneer 35 4.11 L
• 8953004219 '86 Comanche 35 3.31 NL
• 8953004220 '86 Comanche 35 3.54 NL
• 8953004221 '86 Comanche 35 4.11 NL
• 8953004222 '86 Comanche 35 4.11 L
• 8953004244 '86-89 Cherokee, Wagoneer & Comanche 30 4.10 NL disconnect axle
• 8953004458 '86-89 Cherokee, Wagoneer & Comanche 30 4.10 NL w/o disconnect axle
• 8953004459 '86-87 Cherokee, Wagoneer & Comanche 30 3.54 NL w/o disconnect axle
• 8953004512 '86 Cherokee & Wagoneer 35 3.31 NL
• 8953004513 '86 Cherokee & Wagoneer 35 3.54 NL
• 8953004514 '86 Cherokee & Wagoneer 35 4.11 NL
• 8953004515 '86 Cherokee & Wagoneer 35 4.11 L
• 8953004516 '86 Comanche 35 3.31 NL
• 8953004517 '86 Comanche 35 3.54 NL
• 8953004518 '86 Comanche 35 4.11 NL
• 8953004519 '86 Comanche 35 4.11 L
• 8953004680 '87-89 Cherokee & Wagoneer 35 3.55 NL
• 8953004682 '87-89 Comanche 35 3.55 NL
• 8953004683 '87 Comanche 35 3.55 L
• 8953004694 '86-90 Comanche 44 3.54 NL
• 8953004695 '86-90 Comanche 44 4.10 NL
• 8953004697 '86 Comanche 35 3.55 NL
• 8953004768 '86 Comanche 35 3.31 NL
• 8953004769 '87-89 Comanche 35 4.11 NL
• 8953004770 ‘87-89 Comanche 35 3.08 NL
• 8953004771 '87 Comanche 35 3.08 L
• 8953004772 '87-89 Cherokee & Wagoneer 35 4.56 NL
• 8953004773 '87-89 Comanche 35 4.56 NL
• 8953005001 '86-87 Cherokee & Wagoneer 44 3.07 NL
• 8953005002 '86-87 Cherokee & Wagoneer 44 3.07 L
• 8953005003 '86-87 Cherokee & Wagoneer 44 3.54 NL
• 8953005004 '86-87 Cherokee & Wagoneer 44 3.54 L
• 8953005005 '86-90 Comanche 44 3.07 NL
• 8953005006 '86-90 Comanche 44 3.07 L
• 8953005007 '86-90 Comanche 44 3.54 NL
• 8953005043 '86-89 Cherokee, Wagoneer & Comanche 30 3.55 NL disconnect axle
• 8953005045 '86-89 Cherokee, Wagoneer & Comanche 30 3.55 NL w/o disconnect axle
• 8953005172 '87-89 Cherokee & Wagoneer 35 3.55 NL
• 8953005173 '87-89 Cherokee & Wagoneer 35 3.55 L
• 8953005190 '87-89 Cherokee, Wagoneer & Comanche 30 3.55 NL w/o disconnect axle
• 8953005191 '86-87 Cherokee & Wagoneer 44 3.54 NL
• 8953005192 '86-87 Cherokee & Wagoneer 44 3.54 L
• 8953005193 '87-89 Cherokee & Wagoneer 35 3.55 NL
• 8953005215 '87-89 Cherokee & Wagoneer 35 3.55 NL A.B.S.
• 8953005216 '87-89 Cherokee & Wagoneer 35 3.55 L A.B.S.
• 8953005336 '87-89 Cherokee & Wagoneer 35 4.11 NL
• 8953005337 '87-89 Cherokee & Wagoneer 35 4.11 L
• 8953005338 '87-89 Cherokee & Wagoneer 35 4.56 NL
• 8953005412 '87-89 Cherokee, Wagoneer & Comanche 30 3.55 NL w/o disconnect axle
• 8953005413 '87-89 Cherokee, Wagoneer & Comanche 30 3.07 NL w/o disconnect axle
• 8953005416 '87-90 Comanche 44 3.07 L
• 8953005417 '87-90 Comanche 44 3.54 L