REPOSTED FROM CLUBPROTEGE. ORIGINALLY POSTED ON 2/5/2004.
I'm surprised I didn't notice this sooner.... I was looking through my Japanese parts catalogs again and found out that there are factory LSDs for the 2nd gen... not sure if it's viscous or torsen... but regardless, it still means there's more parts
For the G25M-R:
4.105 ring gear ratio: G565-27-190A
For all F25M-R:
4.105 ring gear ratio: F046-27-190B
4.388 ring gear ratio: FA03-27-190B
(unknown ratio): FA18-27-190
(unknown ratio): FV01-27-190B
NOTE: straight forward "bolt on" installation can ONLY be done if you DO NOT change the final drive ratio of your transaxle. If you choose to change the final drive ratio, you MUST change the pinion gear that is pressed onto the counter shaft of the transaxle. The appropriate pinion gear can be sourced from another F25M-R that has the final drive ratio you want. In Mazda transaxles, the pinion gear is machined into the counter shaft, therefore all counter gears must be pressed out and pressed into the replacement shaft.
For the counter shaft that has the:
4.105 ring gear: F5D3-17-301
4.388 ring gear: F5D4-17-301
the following are for FA4A-EL & FB4A-EL automatics:
3.833 ring gear ratio: F044-27-190B
don't know the ratio, but it's listed for use with Z5 equiped cars (I'm guessing 4.058): F048-27-190B
NOTE: straight forward "bolt on" installation can ONLY be done if you DO NOT change the final drive ratio of your transaxle. If you choose to change the final drive ratio, you MUST change the output gear and the idler gear
I'm surprised I didn't notice this sooner.... I was looking through my Japanese parts catalogs again and found out that there are factory LSDs for the 2nd gen... not sure if it's viscous or torsen... but regardless, it still means there's more parts
For the G25M-R:
4.105 ring gear ratio: G565-27-190A
For all F25M-R:
4.105 ring gear ratio: F046-27-190B
4.388 ring gear ratio: FA03-27-190B
(unknown ratio): FA18-27-190
(unknown ratio): FV01-27-190B
NOTE: straight forward "bolt on" installation can ONLY be done if you DO NOT change the final drive ratio of your transaxle. If you choose to change the final drive ratio, you MUST change the pinion gear that is pressed onto the counter shaft of the transaxle. The appropriate pinion gear can be sourced from another F25M-R that has the final drive ratio you want. In Mazda transaxles, the pinion gear is machined into the counter shaft, therefore all counter gears must be pressed out and pressed into the replacement shaft.
For the counter shaft that has the:
4.105 ring gear: F5D3-17-301
4.388 ring gear: F5D4-17-301
the following are for FA4A-EL & FB4A-EL automatics:
3.833 ring gear ratio: F044-27-190B
don't know the ratio, but it's listed for use with Z5 equiped cars (I'm guessing 4.058): F048-27-190B
NOTE: straight forward "bolt on" installation can ONLY be done if you DO NOT change the final drive ratio of your transaxle. If you choose to change the final drive ratio, you MUST change the output gear and the idler gear