[Potroast]

This is quite a common complaint with Tacoma extended cabs and double cabs. Does the Titan also have a 2-piece driveshaft? If so, that is likely the root cause. Where the first and second pieces of the driveshaft mate there is binding which is released when stopping. Try stopping with your transmission in neutral -- if it does not exhibit this "clunk" then you are most likely experiencing this driveshaft issue. The solution that we've come up with for the Tacoma is simply to keep it greased up -- unfortuantly this is a temporary solution, as the clunk will return and you must re-grease. No permanent solution has been found, although no long-term issues have arisen, either.