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Finnster · 12.12.2009, 11:40 AM

The XL and Flux both share the heavier duty drivetrain. The XL has extended drive axles.
The XL comes with a 3spd tranny, the Flux has a single speed. (The Flux is based off the 2spd, with a locked idler gear, #100905. The 3spd is very different than the Flux SS. It requires many gears to be changed to lock.)
XL has the 8 std shock setup, Flux has 4 BB shocks.
Supposedly the flux has a different bulkhead part #.
Flux has a 44T steel, spur XL is 52
The Flux motor mount requires space outside (a cutout) the TVPs to fit. The XL does not have this. XL tvps are obviously longer.
Any 15 series will work in the motor, but will need to be a smooth can. The finned versions will interefere. May be a work around for this, but I haven't seen it.
Both versions will need the upgraded bulletproof diffs to be reliable.
Otherwise they share all the same parts.

Overall, its far easier to start with the Flux to do the conversion than the XL. If you found a cheap enough XL it may be worth it, and swap the trannies around, but from new the flux is the way to go.

	(#2)
Finnster KillaHurtz Offline Posts: 2,958 Join Date: Apr 2006 Location: Bucks Co, PA	12.12.2009, 11:40 AM The XL and Flux both share the heavier duty drivetrain. The XL has extended drive axles. The XL comes with a 3spd tranny, the Flux has a single speed. (The Flux is based off the 2spd, with a locked idler gear, #100905. The 3spd is very different than the Flux SS. It requires many gears to be changed to lock.) XL has the 8 std shock setup, Flux has 4 BB shocks. Supposedly the flux has a different bulkhead part #. Flux has a 44T steel, spur XL is 52 The Flux motor mount requires space outside (a cutout) the TVPs to fit. The XL does not have this. XL tvps are obviously longer. Any 15 series will work in the motor, but will need to be a smooth can. The finned versions will interefere. May be a work around for this, but I haven't seen it. Both versions will need the upgraded bulletproof diffs to be reliable. Otherwise they share all the same parts. Overall, its far easier to start with the Flux to do the conversion than the XL. If you found a cheap enough XL it may be worth it, and swap the trannies around, but from new the flux is the way to go.