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The PerformaBuilt Heavy Hauler 700R4 - 4L60E Transmission

You are looking at the PerformaBuilt Heavy Hauler Series transmission.

BeastThese units are built very similarly to our Pro Race units, but the focus is on durability while maintaining reasonable shift quality. These were specifically developed for commercial, heavy towing, and 4x4 vehicles. The shifts on these units are designed to take the abuse and work associated with these vehicles, but without the tire chirping shifts of our race and performance units.

200BandThese units feature a heavy duty pump with staked bushing, full-time lube modification, to keep the heat down, and modified lockup valve to improve the lockup converters durability so you can tow confidently in overdrive.

We use a heavy duty wide band for maximum hold in second and fourth gear. To compliment this we use the Corvette servo. This servo is the largest servo available from GM. It will supply the clamping force needed for these heavy units but without the excessively harsh shifts associated with the aftermarket super servos."

SpragThen for Fourth (OD) we use the sonnax dual piston servo. This servo has 30 percent more holding force than the stock overdrive servo. That accompanied with the 20 percent wider band will let you tow in overdrive with confidence. Now you have nearly double the load capabilities of the stock transmission in overdrive.

CorvetteWe use carbon composite frictions in the forward clutch set. These frictions have an outstanding friction coefficient for maximum holding. These frictions have superior temperature capabilities so they don't burn easily in even the worst conditions. This is important because this clutch has to bear the load in every gear except reverse.

For the 3-4 clutch we us 8 heavy duty frictions and steels. More frictions than stock which is 6 in most cars and trucks. This along with some additional mods to the 3-4 set to prevent scoring and burning and increase hold.

We next attack the weak link in the particularly heavy vehicles, vehicles used for heavy loads, and those used for 4x4 off-road - where there is constant shifting from first to second and reverse is used for more than backing out the drive way - the sun shell. To address this, we use only THE BEAST. These sun shells do not break. They are almost twice as thick as a hardened or new OEM shell and they have a welded reinforced collar. You will not have to worry about that sudden loss of reverse or 1st and 3rd gears associated with the breakage of this piece.

PumpMoving on to the planetary, both sun gears are machined with slots to increase lube flow. This is a must in these heavy duty units. A lack of lube and cooling is a killer when pulling the boat, camper or that work trailer loaded down with equipment. The Heavy Hauler Series uses 4 pinion planetaries.

For the Heavy Hauler Transmissions we only use the thicker "K" cases that came in the very high performance cars and 4x4 trucks. You won't have to worry about cracked bell housings and cases.

SonaxLastly we address the valve body. Here we perform all the updates for lube and durability, and eliminate the partial lockup function in the 4L60E. This greatly extends the converter life and helps to keep everything much cooler. We improve the flow to the 3-4 clutch set, making sure it has enough supply to help ensure that it holds the load on this crucial shift. We enlarge the apply release feeds for the lockup clutch to make it apply positively and avoid converter clutch burn-up under heavy load. Finally we include a low stall heavy duty carbon composite lockup clutch torque converter.


As with all our units shipping is free within the mainland USA and there is no core charge! And, since we know you need your truck handing time is 4 days or less in most instances. Shipping can be to your residence or any business address with no additional charge. This unit comes with our PerformaBuilt warranty for 1 year regardless of the miles you drive! If it dies you simply return it, we repair it or replace it, and return it to you within days, not weeks. Warranty is limited to repair of the transmission at our facility. We are not responsible for any other loss incurred, such as wages, R&I cost or any other loss.



700R4 4L60 4l65 1982 TO 2006 LT-1 & V6 3.4, 3.8, 4.3, 5.0, and LSX 4l60E and 4L65E STYLES 4.8,5.3,5.7,6.0 CARS AND TRUCKS.



This unit comes with a converter up to a 2500 stall at no additional cost and has a 2 year warranty.

If you have any questions feel free to call 1-888-744-6542 anytime or K

The more we know about your needs, the better we can match you with the right transmission.

NOTE: All units are available in either 2wd or 4x4. If you have a special application requiring a special adapter or output shaft, please contact us and we will be happy to provide it and quote a price for your special application.



Read our complete warranty Here.


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.Free shipping applies only to orders with a shipping address inside the continental United States- (Excluding Alaska & Hawaii).** Warranty is limited to the statement contained on the warranty page on this site. There are no other warranties express or implied. In the event of limited specific brand availability or in the interest of improving our products PerformaBuilt reserves the right to substitute equivalent or better parts in our rebuilds.

Primary address is: PerformaBuilt Transmissions, 50 Slusser Lane, Sugarloaf PA, 18249. Phone Numbers for primary contact are: 1-888-744-6542 & (570)-578-5686. Primary email address is: info@performabuilt.com. Copyright 2009 PerformaBuilt Transmissions. Do not copy/paste or use any part or portion of this website for any purpose without express written permission from PerformaBuilt Transmissions.

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