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38 coupe · 11-03-2022, 07:09 PM

Most 12V solenoids I have seen have 12V stamped on the cover. 6V solenoids are typically not identified.
You can also test with a 6V battery as well. Ground the case and apply power to each wire. One will cause the solenoid to engage, somewhat violently. A 12V solenoid on 6V is a lot less vigorous, hopefully you have one of each to compare.
Don't forget to twist the solenoid when installing it to line the shaft up with the pawl inside the transmission.

11-03-2022, 07:09 PM	#2
38 coupe Senior Member Join Date: May 2010 Location: South Texas Posts: 1,675	Re: Which one should I use? Most 12V solenoids I have seen have 12V stamped on the cover. 6V solenoids are typically not identified. You can also test with a 6V battery as well. Ground the case and apply power to each wire. One will cause the solenoid to engage, somewhat violently. A 12V solenoid on 6V is a lot less vigorous, hopefully you have one of each to compare. Don't forget to twist the solenoid when installing it to line the shaft up with the pawl inside the transmission.