D44 how do I tell what year??

I bought my 98 XJ with a D44 rear axle already installed, I know its out of an XJ but what numbers do I look for to identify which year its from? Im trying to do a disc brake conversion and need the model year to order parts. Thanks in advance!!

87-89 mainly and some say they where an option up to 1991ish.

Axles:

Front Axles
Dana 30 high pinion - reverse cut - 27 spline, 1.16" diameter shafts, 7.13" ring gear - used 84-99 (some axles through 91 are vacuum disconnect, 92+ are non-disconnect, 89-95 with ABS have 5-297x u-joints, all 95+ have 5-297x u-joints, all others have 5-260x u-joints)

Dana 30 low pinion - standard cut - 27 spline, 1.16" diameter shafts, 7.13" ring gear, 5-297x u-joints - used 00-01

Rear Axles
(Note on Dana 35 axles sometimes referred to as Dana 35C - The "C" does not stand for c-clip. It stands for "custom" meaning it came from Dana unfinished.)
(Note on 8.25 axles - none of these axles were used on XJs with ABS brakes. If you have ABS, you have the Dana 35. Without ABS you could have either axle. 8.25 axles are c-clip)

Dana 35 non c-clip - 27 spline, 1.18" diameter shafts, 7.58" ring gear, 2.62" axle tube - used 84-89
Dana 35 c-clip - 27 spline, 1.18" diameter shafts, 7.58" ring gear, 2.62" axle tube - used 90-01
Chrysler 8.25 - 27 spline, 1.17" diameter shafts, 8.25" ring gear, 3" axle tube - used 91-96
Chrysler 8.25 - 29 spline, 1.21" diameter shafts, 8.25" ring gear, 3" axle tube - used 97-01
Dana 44 non c-clip - 30 spline, 1.31" diameter shafts, 8.5" ring gear, 2.75" axle tube - used 87-89 on some (not all) XJs equipped with towing package.

The "BOM" number is stamped on the axle tube.

RCP Phx said:

The "BOM" number is stamped on the axle tube.

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This is best way.

Otherwise if you are just doing a disc brake swap, no need to figure out the year. All XJ D44s are the same.

I have the XJ 44 in my 98. I was told it was out of an 87 or 88, again not sure what year. I ordered the parts for the 87, and they were correct. I think the statement made about them being all the same as fara s parts are concerned is correct.

Jeep was crazy about swapping parts around, but the axles generally stayed the same, with few exceptions (D30 disco/non-disco, 8.25 27/29 spline)

RCman said:

no need to figure out the year. All XJ D44s are the same.

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X2, no difference between the XJ44s. Just say a year until your parts store has a listing for the D44.