The 2262 BEC is simply a band-aid fix, sold by Traxxas, to compensate for the weak TRX4 1 amp XL-5 ESC in order to allow it to be used with the over priced 400 oz/in 2255 high torque servo at 6v. Once installed you have a marginal BEC, supporting a marginal ESC, in order to drive a marginal over priced servo. For virtually the same price price of the band-aid 2262 BEC, you can buy the HW1080 ESC. The HW1080 will drive a very high quality, high torque servo, like a Pro Modeler 470, at 6v without the need for any BEC all for about $50 less total. If you still feel the need for a BEC, you can install a 10amp Castle Creations BEC for $20 still leaving you $30 ahead. The HW1080 ESC/CC 10A BEC/PM 470 servo, is a vast improvement over the Traxxas XL-5/2262/2255. Don't waste your money on the 2262 BEC or 2255 servo!
To compare costs:
2262 BEC $39.99
2255 servo $149.99
HW1080 ESC $42
ProModler DS470BLHV $99
The Traxxas 2262 has been discussed previously in several threads. Here is one.
http://www.rccrawler.com/forum/traxxas-trx-4/603023-traxxas-2262-bec.html
Do a search on "2262" if you wish to see more.