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Our Transmissions
Reasons To Buy
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4l80e Here at PerformaBuilt Transmissions our goal is to engineer and build the toughest transmissions on the planet.

We don’t just rebuild transmissions. We systematically re-engineer each model to eliminate OEM flaws and to achieve the highest levels of performance.

That is why we say our transmisssions are "Not just built.....They're PerformaBuilt".

Our hallmarks are quality, performance and unparalleled customer service.

The latter is what sets us apart from our competition and has allowed us to grow at a phenomenal pace.

We are there before, during and after the sale to support our customers.

All transmissions are thoroughly dyno tested at our production facility before shipment.

They are delivered to your door complete, ready to install, and with the best warranty in the business. There are NO exceptions for racing or mileage. It’s that simple. .

Here are 10 great reasons why you should buy a PerformaBuilt transmission or converter!

  1. We build the best transmissions and converters in the world!

  2. The best warranty in the business. 1 year for the transmission alone, or 2 years if you buy a transmission and converter package.

  3. Race them all you want! Racing a PB transmission does not void the warranty.

  4. Outstanding customer service seven days a week by phone, e-mail, or IM.

  5. Thorough installation instructions with every purchase. We support you before and after the sale!

  6. Our $995 RESTORE guarantee. Any time after the warranty expires, send us your transmission and we will restore it for $995 including all parts, labor and return shipping (mainland USA only) and give you a new warranty. (Note: 4L80E is plus shipping)

  7. Proprietary packaging allows us to ship all of our units UPS Ground (except 4L80E). No more truck shipping!

  8. Free shipping for all transmissions within the continental United States.

  9. Free external cooler with every transmission purchase.

  10. No core charges or core required. *


Need a Restore/Refresh on an exsisting PerformaBuilt unit?

Click HERE

Introducing the new Level 3 - BLACK EDITION 4L6XE 
This unit contains all of the usual Level 3 components listed below and at  plus the added items at bottom of page.

 It features all the components of our Level 3 ( transmissions with these upgrades for added Strength and Durability. (Nothing but the best):

Modified Reinforced OEM style five (5) pinion planetary gear set with a grooved sun gear for improved lubrication
Specially prepared performance input drum assembly (updated to the SONNAX Smart-tech drum)

Molded seal steel pistons
Raybestos composite forward frictions
A set of 9 RAYBESTOS STAGE 1 PERFORMANCE clutches with full thickness steels for High Impact Durability and Super Hold on the 2-3 shift (Upgraded to 10 with- the SONNAX drum)

It also feature the SONNAX HD 2-3 shift valve.

 Borg Warner 29 element dual cage sprag assembly, the strongest available
The BEAST sun shell, considered unbreakable and will withstand the abuse levied in high horsepower extreme torque situations

Ultra wide carbon composite 2-4 performance band with reinforced pin area to prevent tear through along with a new reverse input drum ( BAND DRUM ) .This band will take the abuse and the heat.

Sonnax  SUPER HOLD for maximum second gear hold (It also limits 3rd gear 3-4 clutch accumulation to aid in the 3-4 clutch apply)
Sonnax Dual Piston Overdrive Servo (with the wide Carbon band to stand WOT overdrive if your PCM is set up to allow it)

A Thirteen (13) vane pump with hardened rings and a full-time lube modification which assures maximum planetary life and cooling
PerformaBuilt custom shift kit, a compilation of what we consider to be the best of several known kits and some unique modifications of our own  (L3 plus unit gets a Modified Transgo HD2 kit)

Deep B&M CAST ALUMINUM DEEP PAN and performance filter


In addition this unit comes with a billet output shaft, the Sonnax Smart-Tech input drum and bilet Input shaft,

The Sonnax Smart-tech drum also allows for more frictions in the 3-4 clutch set (a common failure point in the 4l6x series transmissions).

Total price for this is   $4835. It is not listed as a separate unit on our website however during the order of the level 3 you will have a drop down option to  upgrade to this unit or you can order by phone.

This unit also features many other proprietary modifications for performance and durability which help it achieve its unbelievable horsepower capabilities. It will take whatever you dish out and we guarantee it. You won't find a better unit anywhere.






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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.

*Note we do not have cores for the C5 corvette nor the late 2007 up 4L60E and will need to have yours brought to us for the build there is additional charge of $150 or you may pay a core deposit for the non corvetter 2006 TBSS and all units after 2007 you will receive the core deposit back minus return shipping provided it is a rebuildable core.

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: 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.