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Veteran
Posts: 268
Location: Chesterfield, Virginia | Does anyone know who sells a rear differential rebuild kit( bearings,seals gears,ect.) for a 59 Firesweep with a 3.31 ratio? Thanks ahead. |
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Expert
Posts: 1739
Location: Alaska | You can find them online such as Ebay but not sure they are listed for 59 desoto. First determine if you have an open rear or limited slip because they are different size. |
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Board Moderator & Exner Expert 10K+
Posts: 13042
Location: Southern Sweden - Sturkö island | RockAuto has the bearings and kits for this - not the gears though. First check if the gears are worn - it might just be the bearings…. |
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Veteran
Posts: 268
Location: Chesterfield, Virginia | The diff is an open unit. There is no noise yet ,just a lot of play on the diff yoke end ,around 1/1/2 to 2"before it engages. |
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Expert
Posts: 3768
Location: NorCal | To order parts you need to determine the pinion size by the casting number on the lower left side of the housing. The 3.31 gears won't be available new and likely the open differential spider gears won't be either. |
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Expert
Posts: 3393
Location: Chestertown, NY ( near Lake George) | pull it out and check the backlash first. |
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Veteran
Posts: 268
Location: Chesterfield, Virginia | The diff casting #is X-1820657 (aka 657), probably the original rear with 3.31 gear. |
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Expert
Posts: 3768
Location: NorCal | The 657 has the 1 3/8" pinion stem, equivalent of the later 741.
Edited by 57chizler 2019-03-14 12:56 PM
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Veteran
Posts: 268
Location: Chesterfield, Virginia | My mistake;the pinion seal is 1-3/8"Early 741. |
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Expert 5K+
Posts: 6487
Location: Newark, Texas (Fort Worth) | I don't know if these will fit or if you even need them: https://www.ebay.com/itm/MOPAR-NOS-DIFFERENTIAL-SPIDER-GEARS-57-58-5... |
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Elite Veteran
Posts: 967
Location: Pittsburgh, PA | [2019-03-14 Automated Thread Reset] |
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