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The PerformaBuilt Performance 400 Transmission

The PerformaBuilt Hydramatic 400 Racing Transmission is a monster performance transmission capable of 1000+ RWHP. It is available in either an auto/stick trim for the dual purpose vehicle or a full/manual for the race use or for those who prefer to shift manually at all times.

Its features include the following components and modifications (nothing but the best):

We start by cleaning the case in our hot cleaner. Then the case is heated to 250 degrees to remove all water residue. It is then checked carefully for any cracks or distortion and, while cooling, is finished with a high gloss aluminum/gray sealant and allowed to finish cooling. This provides a hard durable finish that is oil and stain resistant for you show guys.

We then inspect the rear planetaries carefully, install the heavy duty roller clutch and cage, and install the assembly into the case. Then the HD low reverse band is installed and band clearance checked and set.

The center support is then inspected, resealed and installed into the case. The support bolt is torqued to spec, and the rear end-play tested and adjusted as necessary. Then the Raybestos Performance/Heavy Duty frictions are installed, followed by the new intermediate overrun braking clutches."

The direct clutch drum is replaced with the 4L80E direct drum and 34 element sprag and race assembly sealed and installed. Raybestos Performance/Heavy Duty frictions and new steels are installed with the clearance set. The assembly is the installed into the case and the drum is static air tested for proper operation.

The forward clutch drum is then assembled, heavy duty frictions installed, and the front pump assembly tested. Special modifications are made to nearly double holding power in this drum.

The pump is carefully inspected, checked for straightness, and a new bushing installed. It is then assembled and installed in the case with the boost valve.

We disassemble the valve body and check all valves for proper motion. We then install the full manual or auto/stick setup, per customer preference, and install a performance filter. A new adjustable modulator is also installed at this time and the transmission is dyno'd for proper operations and line pressure.

There you have the PerformaBuilt Racing Hydramatic 400 transmission. This transmission is up to whatever you can dish out and will perform to and beyond your expectations.




Performance 400 Transmissions

Auto/stick valve body $1800.00


Full manual valve body $1900.00


Full manual reverse valve body with trans brake $2500.00


For converters please see the converters page. Link is at top of this page.


If you have any questions feel free to give us a call 1-888-744-6542

Or for online chat: 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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