[Rob Petrie E395]

Originally Posted by Jim Wahl

This is from NHRA:

NHRA Accepted Products

Locking Type Dipsticks (Auto Trans)

Manufacturer Phone Number Website

A-1 Performance 360-574-9966 www.a-1perf.com
ATI 877-298-5039 www.atiracing.com
B & M 818-882-6422 www.bmracing.com
BTE 800-626-1828 www.bteracing.com
Coan Racing 765-456-3957 www.coanracing.com
Cope Racing Transmissions 219-374-0100 www.coperacingtrans.com
Hughes Performance 602-257-9591 www.hughesperformance.com
Lokar 877-469-7440 www.lokar.com
Mike's Transmission 661-723-0081 www.mikestransmission.com
Performance Automatic 301-963-8078 www.performanceautomatic.com
TCI Auto 888-776-9824 www.tciauto.com
Trans Dapt Performance 562-921-0404 www.tdperformance.com
Transmission Specialties 610-485-9110 www.transmission-specialties.com

GM Performance Parts is now listed as acceptable too on the NHRA site. Only problem is I downloaded the 2010 catalog from thier site and cant find a single locking trans dipstick in it.