Top 5 Frequently Asked Questions

Below are the Five Most Common Questions and their solutions.
1. When connecting to a newer truck with a Cummins and Allison, I am having trouble reading the vehicle parameters. Click here for the answer.
2. Where can I order the TECH TOOL Software from?
Click here for the answer.
3. I received a message in Tech Tool that I need to update from 2.7 to 2.8, but there are no updates available in the Client Update Agent.  What should I do?
Click here for the answer.
4. When will Tech Tool support the new Battery Electric Vehicles (BEV)?
Click here for the answer.
5. Using TT 2.8, I go to program ECU, why is the list is incomplete?
Click here for the answer.

Adapter and Cables

Guide: Click here to access information on connection tips, identifying your truck’s electrical system, and for a description of the various connectors, cables, and adapters (ie. VOCOM, NEXIQ, J-PRO, DEARBORN, Cables: 6 pin, 9 pin and 16 pin).

Adapters and Firmware Updates:  Need to find out which adapter is compatible with Premium Tech Tool?  See the Adapter Matrix below for more information and ensure that the latest released firmware is downloaded to the communication unit. Note: Do not use long expansion cables with USB hubs.

Compatible Adapter Matrix for TT 2.7 (All Brands)

The following Software Drivers and Documentation are available to Download for PTT:


VOCOM II Driver (Version – Now available for TT 2.8

VOCOM II Driver (Version – for TT 2.7

VOCOM II Release Notes (v 4.3.0)

VOCOM II Firmware and Instruction

VOCOM II Instruction Manual


VOCOM I Device Driver/Firmware Update (Version for use with TT 2.7.xx

Premium Tech Tool Support Tools

Support Tool  Designed to assist support personnel in resolving PTT issues, used for – gathering log files, verifying installation/functional status, and to perform a complete removal of PTT from a computer.  Click here to download

SVG Viewer – to view Scalable Vector Graphics in browsers that do not provide SVG:  Click here to download

MultiChannel ToolClick here to download

VMAC III Service Tools

VMAC III Support Software User Guide. 

Cloning Tool– for Tech Tool Cloning Installations.  Authorized users only (password protected).

User Authorization:

Are you having trouble with user authorizations on Premium Tech Tool? If so, be sure to check out the link below for more information, troubleshooting, and example scenarios regarding PTT user IDs, client IDs, and Partner IDs.

User Authorization Guide