Max Power

When I am at a dead stop and let off the brake, the second i give a little gas I hear a short honk type of sound. It only does it there and I don't have to give lots of gas for it to happen.

It's not the suspension either. Anyone?

Kansas

The only noise I could describe as a "honk" in the gen 1 LS400 I drove for 13+ years and sold in 2003 was related to a flap in the HVAC system closing.

JimsGX

What area of the car is it coming from?

lextout

My 96 ls made a humming noise when i turned it off

Max Power

It's coming from the front end. It's hard to pinpoint as I have to be driving it.

it only happens when I give gas in Drive, as well. Should have mentioned that.

It makes the sound for a split second just after I let go of the brake and just as I give a bit of gas.

JimsGX

It sounds suspension related opposed to engine... Maybe look at the strut bar cushions if they haven't been changed. They really take a lot of stress when braking, both forwards and downwards. When you let off the brake and start moving forward, the stress is relieved. This surely happens with other suspension components as well, but I'd look at those first.

Jim

Max Power

That's a good guess, however, it doesn't matter how much or how little gas I give. Meaning, I could have let go of the brake and be rolling forward already, then just blip the throttle, not enough to make the car really move at all, and then it makes the sound.

PureDrifter

iTrader: (10)

transmission mount.

whenever there's load on the trans it twists, and knocks.

Max Power

I replaced the mount this summer with a brand new lexus one.

I'll try to listen from outside while my gf touches the throttle. Maybe I'll be able to pinpoint it a little better.

PureDrifter

iTrader: (10)

check the rear diff mounts and the driveshaft bushing.

Garage7RP

iTrader: (1)

Check you strut rod cushion as JimsGX mentioned.

PureDrifter

iTrader: (10)

that shouldn't make a difference unless the entire front end of the car moves a fair bit.

Max Power

Thanks for the help guys, I'll check out the rear diff and driveshaft bushing.