XT130 diff ratio swap

[dale30]

Hi All
Can anyone help me with info on compatible diff gears for XT130 ( Borg Warner ).

I am trying to find about 3.7:1.. The only others i have found is sigma but they only have 3.42 or 3.89..

We race this corona on the speedway so ratio is very important, But before you ask we cant change the diff housing, we can only change gears.

[brett_celicacoupe]

go and have a look at a RT142. i think they have ratios somewhere between 3.5 and 3.7.

make sure its a live axle model because the IRS ones run a F series diff

[dale30]

Thanks Brett.
i will try hunt one down..I was hoping for something more common..

[brett_celicacoupe]

also check out the ST141 coronas.

have no idea what ratio's they run though, just know they are BW.

[dale30]

ST141 are easy to find but RT142 is that an import.??

[brett_celicacoupe]

nope. RT142 has a 22RE engine. very similar looking to the ST141.

they arent really the rare