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240 rear axle on a 140 140-160

posted by  Svart_Björnsten on  Sun Dec 12 01:25 CST 2021
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Is it possible to replace a 1970 144's rear differential/axle with one from a 1991 240. Not for any performance reasons, the 140's pumpkin is pretty badly rotten and I have a parts 240.








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    posted by  someone claiming to be on  Wed Dec 31 18:00 CST 1969 [RELATED]

    I'm not sure exactly what you are asking. Complete rear axle assembly?--NO--they mount differently and the way the parking brake operates. Axle shafts?--NO--the bearings and seals are completely different. Ring and pinion--YES--but the ratios are very different (240 auto-3.73 -- 240 stick shift-3.31 -- 140 all-4.10). Rear cover?-YES-but new stamped steel covers are available (look at Jeep). - Dave



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      posted by  someone claiming to be on  Wed Dec 31 18:00 CST 1969 [RELATED]

      I dunno, for someone who wasn’t sure what I was asking, your answer was concise and absolutely helpful. Thanks!!



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        posted by  someone claiming to be on  Wed Dec 31 18:00 CST 1969 [RELATED]

        As previously mentioned the whole assembly can't be used directly as the mounting points and the parking brake cables are different, plus the 240 axle assemblies are about 1/2" wider overall.

        If you're willing to modify parts, you can make it work, but why not source a good used rear end.

        It might be hard to find in your area, but Volvo made over a million 140s and 164s that have a rear end that will bolt right in.

        FYI, everything to rebuild a 140 rear end like ring and pinions, carrier, spider gears and bearings are still available new. And there are many companies making locking and limited slip differentials to fit a 140.

        Although some of the internal parts can be swapped over, if you have a 1031 or a 1041 rear axle in your 240, the ring and pinion are different and can't be used to replace the ones in a stock 140 rear end.
        --
        Eric
        Hi Performance Automotive Service (formerly OVO or Old Volvos Only)
        Torrance, CA 90502
        hiperformanceautoservice.com or oldvolvosonly.com



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          posted by  someone claiming to be on  Wed Dec 31 18:00 CST 1969 [RELATED]

          Following Planetman's suggestion -- what is your location? I'm on Long island and have a '69 142 parts car. - Dave



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