Dave's got it right. My 95 v6 (formerly)auto SR5 is G144, so 4.88 gears and the 4pinion rear carrier, and yup factory 4.88 offsets the pinion a wee tad to account for the 4.88 ring gear vs a different gear thickness, so nothing will fit in those to redo except unobtanium 4.88 OEM ring gears...