ATS 42RLE Transmission Packages - 2007-2011 3.8L JeepOn the Trail or Street, the ATS 42RLE is backed by a 5 Year / 500,000 Mile Warranty. The ATS 42RLE is engineered to hold the power and abuse Jeep owners can throw at it. Substantial increases in clutch pack surface area, line pressure and shift quality provide the reliability Jeep owner's demand. ATS 42RLE 2003-2006 Jeep 4.0L Transmission Package Stage Build ComparisonStage 1Stage 2Horsepower Rating300 hp400 hpATS 42RLE Transmission✅✅TruLok® Torque Converter✅✅ATS HD Transmission Pan✅✅Performance Transmission Cooler✅ ATS BilletProof 42RLE Transmission:The 42RLE transmission that is used in the 2003 to 2011 Jeep was never designed to handle the abuse of aftermarket add-ons such as oversized tires, extreme off-roading, increased power levels, higher gear ratios or towing. The small 42RLE factory transmission also has a very low volume cooling system, the low cooler flow does not allow adequate transmission fluid circulation through the torque converter to properly cool the torque converter during normal driving much less stressful situations such as four wheeling or hauling any additional weight over stock.The primary hydraulic pump of the transmission is not big enough to support the increased pressures and lubrication that is needed to keep the clutch packs and gearsets alive at higher power levels.  Other design limitations of the 42RLE plague the ability of the transmission to handle much power over stock. The stock torque converter is manufactured using stamped steel parts that make up the lock-up porting of the converter. The converter cover will deflect under power causing the converter clutch to slip under load creating excessive heat and clutch material to shed from the lock-up piston.The combination of heat and debris from the converter clutch causes transmission failure as the material from the torque converter is flushed into the transmission.The ATS modified 42RLE has been redesigned to correct al