98 zj ford 8.8 swap pinnion flange adapter problem - JeepForum.com
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post #1 of 5 Old 05-23-2020, 10:51 AM Thread Starter
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98 zj ford 8.8 swap pinnion flange adapter problem

hey all I've got a 98 zj with ford 8.8 swap going on.i got the typical 1310 flange adapter ,but its to small.it doesn't fit the pinnion flange holes.waybto small.my 8.8 was salvaged from a 97 mountainer.does any one know what adapter I need. maybe the 1350.i don't want to keep ordering flanges and spending money .I don't need to.is the mountaineer flange bigger the a explorer of the same year.

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post #2 of 5 Old 05-23-2020, 10:55 AM Thread Starter
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here is some pics to help identify.
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received_297200671280452_1590252839501.jpg   received_2362093517424251_1590252890201.jpg   received_1750813095058801_1590252908496.jpg  
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post #3 of 5 Old 05-23-2020, 11:38 AM
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1998 ZJ 
Join Date: Mar 2006
Location: Helsinki, Finland - on the European side of the Atlantic
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There are two pinion flange sizes for the Ford 7.5 and 8.8 axles, small and large.
* Small flange has a 2.5" x 2.5" square bolt pattern, measuring slightly over 3.5" diagonally
* Large flange has 3" x 3" square bolt pattern, measuring very close to 4.25" diagonally
Both use 2" pilot hole diameter.

1310- series small flange is 2-2-939, large is 2-2-1379.

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post #4 of 5 Old 05-23-2020, 11:57 AM Thread Starter
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thank you Timo, that was some great help.i think the adapter 2-2-1379 is what I need. if any one else can confirm this I would be very grateful.
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post #5 of 5 Old 05-23-2020, 01:52 PM
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1996 ZJ 
Join Date: Apr 2010
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I grabbed a 1310 flange from a Ford Ranger 8.8. I’m not positive of the year but it looked late 90’s early 00’s.

It fit perfectly and was like $6. No issues mating up the ZJ rear driveshaft.

(2) '96 4.0s
#2- HP30/Ford 8.8 - 4.56, OME HDs, 5100's, IRO Adj Arms/Track Bars
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