Speedway Motors Ford 4R70W Automatic Transmission, 1998-2003

• Dyno tested Street King 4R70W 4-speed automatic transmission with overdrive
• Street King transmissions suitable for street and mild strip use up to 450 hp
• Features Ford Modular V8 bellhousing pattern (not compatible with small block Ford)
• All new friction and steel plates, new overdrive and low/reverse band
• New bushings and thrust washers throughout
• Front pump rebuilt for higher transmission line pressure
• Valve body rebuilt with shift improvements and all new electronics
• New oil filter and factory steel transmission pan
• Dipstick tube, and torque converter sold separately
• Supports factory PCM or aftermarket standalone 4R70W transmission controller
• Please note, residual transmission fluid may be present in the bag containing the transmission.  This does NOT indicate a transmission leak.  It is a result of the dyno testing of the transmission prior to packaging.

Our Street King Transmissions Save You Time and Money, Getting You on The Road Faster

The typical enthusiast tends to be a Jack of all trades sort. They have dabbled in engine work, handled their fair share of brake and suspension projects, and have probably tackled some interior and wiring fun as well. Where things tend to get dicey for many is aft of the flexplate, the transmission and rear axle. Going inside either of these major components for performance updates or even a simple rebuild from a zillion miles of service usually requires special service tools, a manual full of steps and specs, and a hospital-clean like work area. We know many that have tried to rebuild their own transmission or swap out a rear gear only to have to do it again (or third time’s the charm) to get it right if it is ever right again at all.

Sometimes it is best to simply have your transmission rebuilt instead of investing in all the tools and materials to do it yourself, especially if it is a “one and done” proposition and you’re not planning to rebuild transmissions as a side gig or hobby. The problem with this is often finding a solid and reliable shop that will do the work they say they are going to do and in the timeframe you expect. Today these are far and few between, much like a traditional engine machine shop. We know your time is valuable and when you need a new transmission for a project, or to replace your tired original, having the ability to simply order one of our Street King automatic transmissions, with no core return required, is often the best option.

A Street Friendly Overdrive Transmission That Supports Up To 450 HP

If you’re looking for a solid performing street transmission for your Ford Modular V8 powered classic pickup, muscle car, or hot rod build with the added benefit of overdrive for those long hauls, our 4R70W Street King transmission is the perfect solution to your needs. Our Ford 4R70W transmission features all new internal wear components such as clutch discs, bands, thrust washers, seals, and more. Every 4R70W valve body includes all new electronics along with other shift improvement updates.

Externally, each Ford 4R70W transmission includes a stock steel oil pan. Our Street King 4R70W is compatible with stock Ford PCMs and wiring for plug and play installation or can be controlled via a standalone 4R70W transmission controller and mating harness if you are using a carburetor or aftermarket EFI system. Every transmission goes through a 23-point inspection process on an Axiline transmission dyno before leaving the factory to confirm shifting ability, line pressures, and more so when it lands on your door step you know it’s ready to go.

Our Street King 4R70W transmission uses the standard Ford 28-spline output shaft but note the 4R70W slip yoke is slightly larger than Ford’s standard yoke for the C4/T5/AOD. Simply select the torque converter that best suits your needs, add a transmission dipstick assembly, and you’ll be in business. Of course, if you are building a project from the ground up, you may also need a flexplate, transmission cooler lines, transmission cooler, torque converter fasteners and other items as well to complete your installation.

Built To Last with No Core Return Required

Nobody wants to deal with trying to drain an old transmission of fluid, crating it up, and having some trucking line pick it up when it is convenient for them and not for you. With our Street King transmissions there is no core required. Nothing to send back, no need to sit and wait for any refund, just unbox your freshly built Street King 4R70W transmission and get back to your project. This is especially helpful if you’re building from nothing and do not have a core Ford 4R70W transmission to even send back! Rest easy knowing our Street King transmissions are built by hand using the best parts and backed by the manufacturer’s one year warranty. To sum it up, our Street King transmissions are a great value for your project needs and will provide many miles of trouble free driving.

Valve Body:
Completely rebuilt valve body with shift kit and all new electronics

Washers/Bushings:
New washer set
All bushings replaced
New "Spiral-lock" intermediate snap ring

Clutches/Band:
New high performance clutches
New high performance overdrive and low/reverse band
Overdrive servo hydraulic circuit integrity restored
New Direct Drum

Other features:
High Performance Pump Mods
Factory steel oil pan
New Output Speed Sensors
28-spline output shaft
10.5" Tailhousing