Why does my Tacoma engine sound like a prop plane

Picked up a 05 Tacoma DC TRD Sport recently and been doing some work on it.

It has 155k miles on it and in overall good shape IMO.

Anyway just curious on why the engine is so loud on the highway. At idle it’s fairly quiet but as I accelerate it gets louder and louder almost like being in a prop plane.

Searched around and the general consensus is that it’s loud but wondering if this is normal and if there is anything I should check out? I can’t imagine the soccer mom 03-09 4Runner with the same engine being this loud. It would drive a family crazy. I don’t even remember my old 3.4 97 4Runner being this loud. Anyway I don’t expect it to be as quiet as a Lexus but this seems odd to me.

Thanks

 

Have any pics of the exhaust/muffler? Mine drones bad on the hwy but i put a loud aftermarket exhaust on it. Maybe the previous owner did the same on yours?

 

Yea I thought about that but it starts and looks normal. I’ll take a pic tomorrow.

 

Here's what the stock catback looks like, big ol muffler


here's a pic of the stock manifolds and y-pipe, also would be good to check these. If the PO put long tube headers that are catless, or a catless ypipe, this would make it louder too

 

Thanks I’ll take a look tomorrow

 

Toyota lazyness. They couldnt put a proper electric fan on the engine. Instead you've got 1980s Datsun tech on you tacoma. Fucking bastards

 

I’ll take the 80’s tech over an electric fan any day. An electric fan clutch forced me to do this one day....
Maybe I’m one of the few left that would rather sacrifice performance and comfort for reliability and ease of maintenance.

 

fan clutch perhaps? this thing should shutoff on the highway right? lol not spin faster as i go faster.......

 

Hope it works out. In the meantime, could do you a neighborhood drive by for the kids?....

 

That would be awesome but not many kids out in my neighborhood

 

I’ve got a 1998 T100 that started to do this at around 400,000 miles. Had it looked at and the mechanic said it was probably the fan clutch. I don’t drive the truck enough these days to bother with it, though, and just left it alone. Not saying that’s your problem, but geez that T100 is loud at 75mph on the freeway, haha.

 

Yea I’ll start looking into that more and i def have a stock exhaust

 

Do you have a tach reading ? Is the transmission shifting to final drive gear? Wife’s old maxima od solenoid failed, but she didn’t realize It. I drove it, and yep, at cruise the engine pretty loud. Replaced solenoid, and noisy engine sounded like it should. Drives a ‘17 Camry now though.

 

yea good point - i did take a look at the rpm's and that seems all normal to me hovering around 1500-2000 at highway

 

They went with a more reliable and time tested fan and clutch assembly.

Them bastids!

 

Fan clutch is bad

 

Perfect I’ll do the belt at the same time

 

OEM or aftermarket clutch?

 

Id go with OEM/AISIN. Be weary if you buy one off rockauto, make sure they send you an Aisin one (it should have an AISIN raised stamp on the housing). I did this, and they sent me a cheap part in an Aisin box. Probably wont happen to you, but id try to go oem on an important piece like this

 

So is basically whats happening is the fan clutch is free wheeling at highway speed and creating a bunch of noise?