I'll play however will include "both"....and not as well documented as for changes.
'04 TJ Sport...got lucky, but paid too much (probably) has 3.73s 5 speed 4.0.
Was a "program car" had 22K when I got it in Nov '04. Replaced one clutch at 140K.
Replaced catalytic convertor due to driver errors multiple times. Ran high octane and plugged them up.
Replaced water pump and heater blower motor.
Mods: 3 sets KC lights, Bumpers front and 2 rear, 2 tops, 2 jammers, swing out tire carrier, and back to no tire carrier on rear bumper, heated seats, new head unit, OME lift, 33" Duratracs, Big Q floor mats, more speakers (17 total), Dirty Mudder seat covers, Bushwaker flatflares, Zone quick Discos, BL and MML and most recently a Cobra CB.
My vehicle of choice most of the time. 160K miles+ on the clock
'12 JK bone stock 'cept floor mats and stickers. 18K my wifes vehicle of choice to ride or drive. ......Probably paid to much for it as well and yes it has the 3.21s but I am happy with both of them for what they are.
How about some positive stuff instead of always whinning??