Nissan's answer
This is a direct copy and paste of an email from Nissan.....believe it or not??
Thank you for taking the time to personally contact us about your interest in Nissan products.
Currently, the Electronic Locking Differential is scheduled to begin production on April 4, 2004. For more information regarding the Nissan Titan, please visit the website listed below as it has the most up to date information.
We hope that this information answers your question, but if you need any additional information or have further questions, please let us know by reply e-mail or by calling 1-800-647-7263 and pressing "0" for a live operator.
Also, make sure to take a look at our website,
www.NissanUSA.com, for the most up-to-date product information.
At Nissan, we are committed to a high level of customer service.
Sincerely,
Nissan North America