Mega Monster Transmissions
Engineered to Dominate, the 4L65E 2WD Mega Monster transmission is tough enough to withstand the rigors of even the toughest street machines delivering tire-spinning shifts race after race. It is ideal for vehicles powered by 4.8, 5.3, LS1, or 6.0L engines producing up to 500 horsepower with a non-nitrous system using pump gasoline. Equipped with a Reprogrammed Automatic valve body, most units allow you to shift the vehicle into each gear change or, by placing it in the drive position, remain fully automatic. In either mode, you get a racetrack shift that bangs through the gears giving you all the right to say "Eat My Shift!".
The Mega Monster Transmission features: the latest technology in our industry with only the best internal components for increased strength, dependable performance and monster torque capacity. All Monster transmissions are thoroughly inspected, blue printed and tested to ensure that your investment is completely flawless. For the system to operate properly, ECM computer code(s) must be cleared prior to initial drive of new transmission. We recommend using a Snapon-OTC or Dealer scanner for this procedure.
√ PRECISION MASTER OVERHAUL KIT
√ NEW ELECTRONICS INCLUDE
√ SUPERIOR HIGH PERFORMANCE REPROGRAMMING SHIFT KIT
√ SUPER PUMP
√ DIRECT/REVERSE INPUT DRUM
√ TURBINE INPUT CLUTCH HOUSING
√ MODIFIED SUNSHELL DRIVE GEAR TO INCREASE REAR PLANETARY LUBRICATION
√ MODIFIED INPUT SUN GEAR TO INCREASE FORWARD PLANETARY LUBRICATION
√ UPDATED/MODIFIED ACCUMULATORS
√ RAYBESTOS PRO SERIES BAND
√ HEAVY DUTY SUNSHELL
√ RECALIBRATED VALVEBODY
√ RECALIBRATED VALVE PLATE FOR SHIFT FIRMNESS
√ NEW HIGH FLOW FILTER
√ NEW LOW/REVERSE HEAVY DUTY SPRAG
√ NEW 29 ELEMENT HEAVY DUTY FORWARD INPUT SPRAG
√ NEW HIGH PERFORMANCE ALUMINUM SERVO
The chrome pan in the product photos is an upgraded item that is shown as a related product that you can add to your cart.
The 4L65E has a 3.06 ratio in first gear, which is 20% lower than most transmissions. The 30% overdrive will give a 30 to 40% increase in gas mileage on the road when compared to a 3-speed automatic transmission.
Posted by Mike Frazier on 12th Oct 2011
I was impressed by the quality of my unit that replaced the weak unit in my 2006 Avalanche.
Nice touch was the deeper oil pan with a drain plug.
Everything went in just fine and works great.
I was not happy about the shift quality tho and called Monsters tech department to find outthat I need to take mine in to a GM dealer to have the PCM re-flashed so it "knows" it got a new trans.
I was also told that once I do that at a cost of $140.00 for me then it will shift harder(I had the stage 2 shift kit installed) than it does right now (like it did stock).
I did clear the codes with a $500.00 scan tool as per instructions but I did not know that I was going to have to go to the dealer after that.
I am happy with the transmission tho overall and look forward to many miles of trouble free service from it.