Hi,
Purchased a 2005 S2000 a few weeks ago.

I noticed while cruising at highway speeds(60/70/80 MPH), if i quickly let off the gas the car slightly shifts to the right.
Spent almost 20 years using front drive automatics.

Is it normal for the car to do that?
Checked tire pressure, @32psi.
The alignment appears to be ok.
There's no slop/play at the steering wheel.

Thanks for your time to read this.

 

No its not normal. If its not the road then its probably ur alignment.

 

If alignment does not fix it, check the rear wheel bearings. Mine had no noticeable pull when accelerating or just driving but it would dart right when I pushed in the clutch to shift. That was after I had torqued the rear stub axle nuts three times. TSB does not tell you that the wheel bearings are wearing. It just tells you to re-torque the nuts.

 

mine used to do this. check your diff fluid. change it.
my car acted the same way when i purchased it. i changed the fluid and it was fixed. make sure you use the correct fluid. if the fluid has been changed then look into a sticking caliper.

 

That often happens when there is a difference in the diameter of the two rear tires, usually an inflation difference. Sometimes rear tire wear can bring it on.

 

Alignment
Mismatched tread wear
Uneven tire pressure
bent/unbalanced wheels.

 

First, i like to thank you for your replies.

When i first got the car, i had it on jack stands and checked the suspension(nothing out of the ordinary).
Spun the wheels and they turned freely.

Didn't checked the torque on the rear axle nut, don't have a socket big enough.

Today i checked the level of the oil in the diff, it was lower than the fill plug. Ran out to dealer and got more diff oil and filled to proper level.
I wont be able get it on the highway till Friday.

Just checked the tire sizes. Front 215/45/17 Rear 245/40/17.
BUT... i noticed i have 2 different tire brands. The fronts are "Champiro UHP1" The rears are "Nexen N3000" Maybe that's the problem?
I would say the tire threads are half worn.

Also changed out the tranny oil today.

 

no the tire brands are not the problem. Did you check the tire pressures? and does the tires wear out evenly?

 

The car is really sensitive to tire pressure, a couple of psi can do this. I'd really make sure the pressures are all the same.

If the tires are worn differently left vs. right, this could be the problem. The fact that there are cheap tires on the car would make me suspicious of that.

It only takes one tire to be over/under inflated or more/less worn than the others.

 

Diff fluid level should be just at the fill hole. you should really change the fluid all together if it has never been changed or if you filled it with the new fluid you bought. now you mentioned you got the diff fluid from the honda dealer? chances are they gave you the wrong one. take a picture of the bottle they gave you.

and as mentioned before these cars are sensitive to tires, if your tires have an uneven wear or bad alignment it will tell you.