Holley Sniper EFI - Sniper 1 Transmission Control Kit 551-101
Type: Transmission Controller
The Sniper Transmission Controller (STC) allows the use of common Ford and GM electronic four speed transmissions. It connects to your Sniper EFI system via CAN bus and is programmed through the existing Sniper 3.5” touchscreen (not included). No programming is available with PC computer software, but the transmission functions can be data logged and reviewed with Sniper PC software. This kit is intended to work with Sniper throttle body injection systems only as it contains the Sniper Transmission Control Module as well as the Power/CAN bus harness.
Features:
- Adds electronic transmission control functionality to a Sniper 1 system
- Tune upshifts, downshifts and wide open throttle (WOT) shift points
- Full programmability of torque converter lockup
- Full tuning of transmission line pressure (shift firmness)
- Tuning is performed through an LCD touchscreen (not included)
- Transmissions harnesses sold separately
Specs:
- Application: Sniper 1
- Brand: Holley Sniper EFI
- Category: Transmission
- Emission Code: 5
- Grade Type: Performance
- Part Type: Automatic Transmission Control Module
- Product Type: Transmission Controller
- Sub Category: Control Modules
Tech Resources:
Requires Sniper Version 2 ECU and handheld firmware.
Ford and GM 4 speed electronic overdrive transmissions are simple in operation, as they have 4 speeds with the top gear being an overdrive and all have a lockup torque converter that eliminates any slippage when the lockup is applied. With a stock torque converter, the lockup should only be applied under light throttle conditions or excessive wear will occur. Upshifts, downshifts, and torque converter lockup, are based on vehicle speed and throttle position (or optionally the MAP sensor) and are adjustable with the 3.5-inch touchscreen (not included).
MAP sensor is needed if using MAP for line pressure, which is usually only done with forced induction applications.
Controls conventional electronic 4 speed transmission applications, transmission specific harnesses sold separately:
558-405 - 1996-2008 GM 4L60/70/80E
558-455 - 2009+ GM 4L60E
558-470 - 1998+ Ford 4R70W/4R75W
558-471 - 1992-1997 Ford AODE/4R70W
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Important Notices
- Professional Installation Recommended
These parts should be installed by qualified professional mechanics. Improper installation can cause performance issues or vehicle damage. Unless a product page explicitly states otherwise, installation instructions are not included. Components are designed for users with solid mechanical knowledge, and minor adjustments or modifications may be required for proper fitment. Returns or refunds cannot be accepted due to difficulty completing an installation or the absence of instructions. - Warranty Impact
Use of these parts may void your vehicle’s factory warranty. Confirm with your vehicle manufacturer before purchase and installation. - Limitation of Liability
JS Speed is not responsible for damage, failures, or issues arising from the use or installation of these products. - Product Images
Images are for illustration only and may differ from the actual product due to manufacturer updates or improvements. - No Performance Guarantees
While these products are designed to enhance performance, JS Speed does not guarantee specific performance results.
