Table of Contents
Advertisement
Quick Links
Sniper Standalone Transmission Controller
Contents
Overview .................................................................................................................................................................................................... 1
Kit Contents/Additional Parts Required ...................................................................................................................................................... 1
General Operation ...................................................................................................................................................................................... 2
Initial Use .................................................................................................................................................................................................... 4
Perform Wizard .......................................................................................................................................................................................... 4
Tuning and Setup Parameters .................................................................................................................................................................... 6
Setup Icon .............................................................................................................................................................................................. 7
Shifts Icon .............................................................................................................................................................................................. 9
WOT Shifts Icon ................................................................................................................................................................................... 10
TCC Icons ............................................................................................................................................................................................ 10
Line Pressure Icon ............................................................................................................................................................................... 12
Outputs Icon ......................................................................................................................................................................................... 13
Monitors/Gauges ...................................................................................................................................................................................... 14
OVERVIEW
The Sniper Transmission Controller (STC) allows the use of common GM and Ford electronic four speed transmissions. Part Number
551-102 is a stand-alone controller and is intended to work with carbureted or EFI applications that don't support electronic
transmission control. You will need a throttle position sensor if one is not already installed. The included 3.5" touch screen is used to
perform all the allowable adjustments (shift speed, torque converter lockup, etc.) No programming is available with PC computer
software, however the transmission functions can be data-logged and reviewed with Sniper EFI PC software.
KIT CONTENTS/ADDITIONAL PARTS REQUIRED
This kit contains the Sniper Transmission Control Module, 3.5" Touchscreen handheld tuner, and power/sensor harness.
The user must purchase a transmission harness separately that fits their specific transmission. These harnesses are as follows
(note that these are the same harnesses used for Holley Dominator and Terminator X Max ECUs):
558-405 - GM 4L60/70/80E
558-455 - 2009+ GM 4L60E*
558-470 - 1998+ Ford 4R70W/4R75W
558-471 - 1992-1997 Ford AODE/4R70W
Full User Manual
551-102
Advertisement
Table of Contents
Subscribe to Our Youtube Channel
Related Manuals for Holley 551-102
Summary of Contents for Holley 551-102
-
Page 1: Table Of Contents
The Sniper Transmission Controller (STC) allows the use of common GM and Ford electronic four speed transmissions. Part Number 551-102 is a stand-alone controller and is intended to work with carbureted or EFI applications that don’t support electronic transmission control. You will need a throttle position sensor if one is not already installed. The included 3.5” touch screen is used to perform all the allowable adjustments (shift speed, torque converter lockup, etc.) No programming is available with PC computer... -
Page 2: General Operation
Install the (purchased separately) transmission harness. Connected it into the 26 pin (smaller) connector on the STC unit. Instructions for the specific transmission harness can be found at Holley.com under the transmission harness part number. They typically have a power connection to the battery and are plug-and-play to the transmission. - Page 3 Black Wire – Sensor Ground Green – TPS Signal MAP – The MAP sensor connector is for the common GM 1 Bar MAP. (Holley PN 538-24). The pinout is as follows: Orange Wire – 5 Volt Reference Black Wire – Sensor Ground Red/Black –...
-
Page 4: Initial Use
INITIAL USE Turn on the vehicle’s ignition power. When powered up you’ll see the main screen (Figure 2). The Sniper EFI as well as the Transmission controller functions (tuning, gauges, wizards, logging) will all be performed through the same icons in Figure 2. Figure 2 PERFORM WIZARD The STC wizard must be performed. - Page 5 Number of Cylinders Select MAP Sensor – If your application is naturally aspirated (no turbo or supercharger), you’ll almost always not need/use a MAP sensor. Select “None Used” if none is used. Enter Tire Diameter (Figure 5) – Enter Height/Diameter for rear tire in inches. Figure 5 Enter Rear Gear Ratio (Figure 6).
-
Page 6: Tuning And Setup Parameters
At this point a base calibration will be created and you’ll see a file name of “AT” or “FAT” (Figure 8). Select “Start” and you will be prompted to cycle the ignition power. Select “Finish” (Figure 9). Figure 8 Figure 9 Next, return to the “Wizards”... -
Page 7: Setup Icon
Setup Icon Select the Setup icon, and the choices in Figure 12 are displayed. Most (not all) of these were configured during the wizard process. Figure 12 General Icon Select the general icon. The transmission types are displayed (previously selected in the wizard). Transmission Type –... - Page 8 Sensors Icon This area can be used to change/add a MAP sensor. The “MAP Sensor Offset” shouldn’t need to be changed from 0, but can be use if the sensor value is off by a few percent. Gear Ratios Icon Gear Ratios –...
-
Page 9: Shifts Icon
Table Config Icon Line Pressure Scale – Chooses whether the MAP (Manifold Air Pressure) sensor or TPS (Throttle Position Sensor) is used for the line pressure table. Naturally aspirated engines should use TPS and boosted engines typically use MAP, as engines can generate boost under non-WOT TPS conditions which require higher line pressure. -
Page 10: Wot Shifts Icon
Never allow for an up-shift point on a lower gear, to occur at a higher vehicle speed than a higher gear shift point. This can be checked by looking at the “Shifts” screen and viewing the lowest and highest shift MPH for each upshift and making sure the “Shift Up 1 ”... - Page 11 Time in Gear Before Lockup – This is a delay that occurs before the converter locks when it shifts into a gear where lockup occurs. 2 seconds is a good starting point for good drivability. De-activation Icon The De-activation parameters (Figure 22) are various parameters to adjust when the converter unlocks. Figure 22 Max TPS TCC - Throttle position value when the TCC will unlock.
-
Page 12: Line Pressure Icon
Lockup Beginning Duty Cycle - This is typically set at 50% Lockup Ending Duty Cycle – This needs to be set at 100% Lockup Time – This is how long it takes to go from the beginning to ending duty cycle. .5 seconds makes for a quick, hard apply, increasing this value to 1-3 seconds will smooth the lockup apply. -
Page 13: Outputs Icon
Temperature Modifier The Temp vs. Line Pressure table (Figure 29) is used to alter the line pressure base on transmission fluid temperature. When the fluid is cold, it is thicker. The line pressure can be increased to maintain the same end “feel” when the fluid is cold as when warm. To “increase”... -
Page 14: Monitors/Gauges
Holley Performance Products Toll Free Technical Service: 1-866-464-6553 Technical Service: 1-270-781-9741 For online help, please refer to the Technical Information section of our website: www.holley.com © 2023 Holley Performance Products, Inc. All rights reserved. Tous Droits Réservés. 199R12494 Revision Date: 9-26-23...
Need help?
Do you have a question about the 551-102 and is the answer not in the manual?
Questions and answers