Biggator

Hey guys, I need a little help here if you don't mind. I recently installed a pyrometer and boost gauge on the truck. Shortly afterward I have a strange tapping noise whenever I put the truck in reverse. I wouldn't think that installing the gauges would cause the noise but stranger things have happened I guess.

Any ideas?

JD730

Lots of em, but we need some more info first, like year, trans type, 2wd/4wd, mods, etc...........
Also, fill out you sig. under the User CP. That way everyone will know what you have when you post.

Biggator

Sorry, I forgot about the most important part.

89 2wd, 3 speed auto, no mods to speak of...

JD730

It only does it in reverse? Moving or stopped in reverse? Not in any of the forward gears?

It could be the start of a flex plate cracking, but that's just 1 thought.

Hopefully someone else has some ideas.

Biggator

Only in reverse. If I turn the wheel before I back up it makes the same sound. Very strange...

Biggator

BTT, anyone else have any ideas?

eyoung429

First, I would have 2 people stand outside the rig and then backup. They would be able to tell if the noise is coming from the front or rear and which side. Did you recently take the spare out from under the bed? Is the exhaust loose??

Lot's of different things but would have to know approx where the noise actually is.

Biggator

By driving the truck I can tell it's on the passanger side, under the hood, near where the turbo is located or lower. I'm thinking the exhaust might be tapping against something, but it seems to be tight.

eyoung429

I would then take a look at the motor mounts.....