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Knocking noise. Starting to scare me

Discussion in '2nd Gen. Tacomas (2005-2015)' started by SpeedoJosh, Apr 12, 2015.

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Jun 15, 2015 at 10:53 AM

#21

#21
1owner05 Well-Known Member

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Feb 19, 2015

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#149051

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Long Island

Vehicle:

05 black

SpeedoJosh[OP] initial post: ↑

So I have an occasional knocking noise coming from the truck, and I believe it's the engine. I say occasional b/c it's not constant, but it's very frequent.

Most of the time it happens when I'm in too high of a gear for the speed or situation. So for example, cruising at 35 and going up a hill. Instead of mashing the gas to prevent speed lose, I'll just keep the same throttle. Nearing the top of the hill there is a very noticeable knocking noise. Not a high pitch, but a deeper noise. Once I let off the gas it stops.

Also, can make it happen if I'm cruising in traffic slowly when the RPMs are low(around 35-40), and then give it a good bit of gas (but not floor it to cause an instant gear change.). Before the truck down shifts, there is a noticeable knock.

Truck is a 2010, 130k miles. Dealer maintained it's entire life. With the stereo on, I can't hear it. I would almost swear this never happened before I had the transmission serviced at the dealer 10k miles ago, but could be a coincidence.

Any thoughts? I've heard that these engines are noisy buggers, and of spark knock. I'm not exactly sure what spark knock sounds like, so hard for me to write it off as such.
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You ever resolve this? I have the same problem with my 2005.

1owner05, Jun 15, 2015

#21

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