Mystery noise. Transmission?

'96 Honda Accord makes a groaning noise, most consistently when I’ve been cruising and braking slowly before a light (so at a pretty low speed) and then press the accelerator again to speed up. What’s up with that?

Need more info. Specifically, does you Accord have an automatic transmission or a 5-speed manual? Have you checked the transmission fluid level? Could it be a rattling heat shield on the exhaust system?