AOD VALVE BODIES

All of Silverfox Performance Transmission's AOD valve bodies are complete and ready to install. They come boxed with a new filter and gaskets, as well as simple instructions to guide you. All that you need is time, a torque wrench, a few tools, and your choice of ATF. All automatic shifting valve bodies are also boxed with a new updated Ford 2-3 accumulator piston.

Every valve body is modified by Silver Fox Performance Tranmission for your application. No off the shelf shift kits here!

Standard Modifications Include:

  • Calibrated line pressure
  • Cooler charge pressure and full time lubrication
  • Customized shift firmness (See Stages below)
  • Customized Shift points
  • Modified spring/valve assemblies
  • Custom separator plate modifications
  • Wide Open Throttle Screw (SPT exclusive mod)
  • Higher RPM 2-3 shift (SPT exclusive mod)

Stages:

  1. Slight Improvement over stock shift feel with all of the additional modifications (best used with stock converter stall ranges)
  2. Firm shifts with increasing firmness with throttle (typical stage for most stock/street applications, 500rpm+ over stock converter suggested)
  3. Very firm shifts with traction loss (500-800 rpm+ over stock stall - firmest stage suggested for lockup converters)
  4. Consistently firm shifts through throttle range with traction loss (non-lock converters, 3k+ stall)
  5. Race calibration - consistently firm shifts through throttle range with traction loss, MAC or MVB only (non-lock only, 3k+ stall)

Please see Contact page and submit a completed spec sheet with your request.

SPT-1


The SPT-1 is the original Silverfox valve body. It is the first step to solving the annoying AOD shift overlap, early shit points, and sloppy or erratic shift firmness levels. The SPT-1 has been a huge success.

  • Retains the stock shift pattern: P-R-N-(OD)-D-1
  • Automatic shifting only
  • Stage calibration available
  • TV cable required
  • ~500hp

SPT-1CP (constant pressure)


This is Silver Fox Performance Transmissions version of the "other guy’s" popular CONSTANT PRESSURE valve body available all over the net. This valve body incorporates every advantage of the original SPT1 series and simply has constant pressure that eliminates pressure modulation from the TV circuit. If you hate the TV cable or are down-right scared of it – this VB is for you! You can be assured that years of experience as AOD gurus, this valve body will outperform any others.

*Please note this valve body does not eliminate the use of the TV cable. The cable MUST STILL BE USED and functioning properly so the valve body can receive feedback from throttle position to maintain shift points. No one can make the claim it will eliminate the cable and still shift full-auto.

  • Retains the stock shift pattern: P-R-N-(OD)-D-1
  • Automatic shifting only
  • Stage calibration available
  • TV cable required (adjustment is not critical to transmission reliability)
  • 500hp+

SPT-R (w/OD Lock-out)


The SPT-R takes all the advantages of the SPT-1 Series valve body and adds an overdrive lock-out feature. This is the most versatile valve body in the Silverfox lineup! The shift pattern is altered so that the user can command each gear separately, and uses a solenoid for overdrive engagement. No more “1-D-1 Shuffle”!!! It can be shifted manually or left in D to shift on its own. Unit includes the wire harness. A switch kit is not included.

  • Modified shift pattern: P-R-N-(4)3-2-1
  • Stock shifter can be used
  • Automatic and Manual shifting
  • Stage calibration available
  • TV cable required
  • ~500hp

SPT-MAC (constant pressure)


The MAC valve body is a CONSTANT PRESSURE version of the SPT-R with the overdrive lock-out feature for 500+ hp use. The shift pattern is altered so that the user can command each gear separately, and uses a solenoid for overdrive engagement. No more “1-D-1 Shuffle”!!! It can be shifted manually or left in D to shift on its own. Unit includes the wire harness. A switch kit is not included.

*Please note this valve body does not eliminate the use of the TV cable. The cable MUST STILL BE USED and functioning properly so the valve body can receive feedback from throttle position to maintain shift points. No one can make the claim it will eliminate the cable and still shift full-auto. If disconnected, the valve body will perform much like a manual valve body, and will not downshift with increased throttle – perfect for that day at the track or dyno!

  • Modified shift pattern: P-R-N-(4)3-2-1
  • Stock shifter can be used
  • Automatic and Manual shifting
  • Stage calibration available
  • TV cable required (adjustment is not critical to transmission reliability)
  • 500hp+

The MAC is an effective street / strip valve body designed strictly for performance applications.


SPT-MAC-TB (constant pressure with transbrake)


Instant off the line release!

MAC + Transbrake = full auto fun!

SPT’s AOD transbrake has one of the fastest release times we have experienced with a simple valve body swap. Unlike some other transbrakes, reverse acts normally with no need to press the button for reverse. The unit only allows TB use in manual 1st.

  • Modified shift pattern: P-R-N-(4)3-2-1/TB
  • Stock shifter can be used
  • Automatic and Manual shifting
  • TV cable required (adjustment is not critical to transmission reliability)
  • 500hp+

SPT-MVB (forward pattern)


The SPT-MVB is a 100% full manual shift valve body that requires NO TV CABLE! It has instant shifts on your command! It is Dan’s own design and comes with two calibrations: Street and Race. Street calibration is tuned for less abuse than the Race calibration, and ideal for lower stall applications or hot rodders who don't desire the constant whiplash of a full race manual valve body. Overdrive is operated with a solenoid.

  • Modified shift pattern: P-R-N-(4)3-2-1
  • Stock shifter can be used
  • Manual shifting ONLY
  • No TV cable required
  • 500hp+

SPT-MVB-TB (forward pattern)


This valve body utilizes the same transbrake design as the SPT-MAC-TB shown above. SPT’s AOD transbrake has one of the fastest release times we have experienced with a simple valve body swap. Unlike some other transbrakes, reverse acts normally with no need to press the button for reverse. The unit only allows TB use in manual 1st. Overdrive is operated with a solenoid.

  • Modified shift pattern: P-R-N-(4)3-2-1/TB
  • Stock shifter can be used
  • Manual shifting ONLY
  • No TV cable required
  • 500hp+

SPT-RMVB or SPT-RMVB-TB (reverse pattern) with or w/o Transbrake


The Reverse pattern AOD MVB is exclusive to Silverfox Performance Transmission. Developed for off-road competition, but has its place in drag racing applications too. If you need the quick change from R-N-1 or the added safety of pulling down away from neutral this is the VB you want. The SPT-RMVB is a 100% full manual shift valve body that requires NO TV CABLE! It has instant shifts on your command! It is Dan’s own design and comes in race calibration only. Overdrive is operated with a solenoid. Available with transbrake. Like all SPT transbrake valve bodies, reverse does not require the TB button and is only active in manual 1st.

  • Modified shift pattern: P-R-N-1-2-3(4)
  • Stock shifter can be used – aftermarket is suggested
  • Manual shifting ONLY
  • No TV cable required
  • 500hp+

AOD Custom Valve Body


We have seen it all! Years of experience as AOD gurus have brought every major competitor’s valve body through our shop from A to Z. We can virtually build any valve body design you can dream up. Contact us from the Contact page.


4R70W / 75W VALVE BODIES

All of Silverfox Performance Transmission's 4R valve bodies are complete and ready to install. They come boxed with a new filter and gaskets, as well as simple instructions to guide you. All that you need is time, a torque wrench, a few tools, and your choice of ATF.

Every valve body is modified by Dan for your application. No off the shelf shift kits here!

Stages:

  1. Slight Improvement over stock shift feel with all of the additional modifications (best used with stock converter stall ranges)
  2. Firm shifts with increasing firmness with throttle (typical stage for most stock/street applications, 500rpm+ over stock converter suggested)
  3. Very firm shifts with traction loss (500-800 rpm+ over stock stall - firmest stage suggested for lockup converters)
  4. Consistently firm shifts through throttle range with traction loss (non-lock converters, 3k+ stall)
  5. Race calibration - consistently firm shifts through throttle range with traction loss, MAC or MVB only (non-lock only, 3k+ stall)

Please see Contact page and submit a completed spec sheet with your request.

SPT-4R1


SPECIAL REQUEST ONLY

The SPT-4R1 valve body is the first step to transforming any 4R70W into a street happy transmission. Each unit eliminates excessive shift overlap or flare and sloppy or erratic shift firmness levels.

Modifications include increased base line pressure, full time torque converter charge, constant cooler flow, and custom separator plate modifications. Each unit is built to match the needs of your vehicle electronics. BOLT IN AND GO!

Let us know some specifications and how you plan on using the vehicle. We will gladly suggest the proper calibration.

The SPT-4R1 can support applications up to 500hp.

Silverfox Performance Transmission will suggest accessories with the valve body sale based on year/make/model where applicable.

  • Retains the stock shift pattern: P-R-N-(D)-2-1
  • Automatic and Manual shifting
  • Stage calibration available
  • Electronics required
  • ~500hp

SPT-4R MAC


The MAC is a constant pressure version of the 4R-1. The unit still uses the EEC/PCM to control the shift, but the pressure modulation circuit is disabled in favor of fixed line pressure. Tune work for pressure is eliminated. This valve body can be calibrated for street/hot rod, or race. Fits AODE and 4R70W.

  • Retains the stock shift pattern: P-R-N-(D)-2-1
  • Automatic and Manual shifting
  • Stage calibration available
  • Electronics required
  • ~500hp

SPT-4R MVB (forward pattern)


100% full manual shift valve body that requires NO ELECTRONICS! It has instant shifts on your command! It is Dan’s own design and comes in two calibrations: Street and Race. Street calibration is tuned for less abuse than the Race calibration, and ideal for lower stall applications or hot rodders who don't desire the constant whiplash of a full race manual valve body. Overdrive and Lockup are operated by a switch and uses factory harness connector. This is the perfect valve body to run a AODE/4R70W/75W trans in ANY application and fits all year/make transmissions.

  • Modified shift pattern: P-R-N-(4)3-2-1
  • Stock shifter can be used
  • Manual shifting ONLY
  • No electronics required
  • 500hp+

SPT-4R MVB (reverse pattern)


The Reverse pattern 4R-MVB is exclusive to Silverfox Performance Transmission. Developed for off-road competition, but has its place in drag racing applications too. If you need the quick change from R-N-1 or the added safety of pulling down away from neutral this is the VB you want. 100% full manual shift valve body that requires NO ELECTRONICS! It has instant shifts on your command! Comes in two calibrations: Street and Race. Street calibration is tuned for less abuse than the Race calibration, and ideal for lower stall applications or hot rodders who don't desire the constant whiplash of a full race manual valve body. Overdrive and Lockup are operated by a switch and uses factory harness connector. This is the perfect valve body to run a AODE/4R70W/75W trans in ANY application and fits all year/make transmissions.

  • Modified shift pattern: P-R-N-(4)3-2-1
  • Stock shifter can be used – aftermarket is suggested
  • Manual shifting ONLY
  • No electronics required
  • 500hp+

SPT-4R-MVB-TB, SPT-4R-RMVB-TB


4R Transbrake valve bodies are still in prototype phase


4R Custom Valve Body


We have seen it all! Years of experience as AOD gurus have brought every major competitor’s valve body through our shop from A to Z. We can virtually build any valve body design you can dream up. Contact us from the Contact page.