Got a 00 Dakota with a 3.9L V6. 131k Every Once in awhile when I get on it from either a roll under 30 or a dead stop it will run up first gear just fine but when I hit second it's like it's in neutral and it will bang the rev limiter take my foot off its fine grabs the gear and goes on. Doesn't do it all the time tho. Hot or cold doesn't matter either.