48re front planet is 100% interchangeable with 47re 5 pinion steel and 47rh 5 pinion aluminum planetaries, however, the nude colored torlon plastic isolator is different length because 48re ring gear is different thickness than 47re ring gear so just reuse the 47re ring gear and 47re planetary plastic isolator and it's a 100% direct swap. If you are upgrading a 47rh, the 47re steel 5 pinion and 48re steel 6 pinion both fit as 100% direct swap but the 47rh aluminum planet does not have a plastic isolator so you'll need to locate a 47re isolator.
The rear 48re 6 pinion steel planet is different overall height than a 47re/47rh 4 pinion aluminum planet and therefore is not a direct swap unless you customize parts for clearance or swap out the rear ring gear, sunshell/gear, and forward ring gear to make everything stack up correctly.
In the overdrive, the 48re 6 pinion overdrive planet is a 100% direct swap for a 47re 5 pinion steel planet and late model 47rh 5 pinion angled steel planetaries. Some of the early 47rh (mostly 1994 model year) came with straight cut overdrive planet 5 pinion steel setups and they are not compatible with the newer helical cut 5 pinion steel 47re and 6 pinion steel 48re planet sets.
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95' 2wd Junker Drag Truck
1502 HP Fuel-Only 12mm P7100 Pump
SXE 472 over GTX55 116mm
OEM 12v Block
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