A10 Park to Drive Squat

I have had my '18 with the A10 transmission for a little over 2 months and 2k miles. One thing I have noticed is that when switching from Park to Drive the back of the car will 'squat' down.

The 'squat' is only occurring at the back of the car, the front is fine. When the 'squat' occurs the back of the car will go down and sometimes there a good amount of bounce when it does the squat. I only have my foot on the brake.

I have noticed that as the car has more miles on it the amount of 'squatting' down has increased. Is this normal for others or is there something possibly loose on the back end? I know there is supposed to be some play in the rear for the IRS and NVH reduction so not sure if it is normal.

Tx

It's how automatic rwd cars with torque converters act, especially more "performance" oriented ones. It's the torque converter getting loaded.

And yes, the looseness of the drivetrain and/or rear end does play a factor in how noticeable it is.

EFI said:

It's how automatic rwd cars with torque converters act, especially more "performance" oriented ones. It's the torque converter getting loaded.

And yes, the looseness of the drivetrain and/or rear end does play a factor in how noticeable it is.

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This...
Your foot is on the brake, you put it in gear and torque is transferred to the rear. Since the wheel can’t move, that torque is loading the rear suspension in the form of the squat you are experiencing.

It's loading the rear suspension through the brakes, which are mounted on the uprights/hub carriers. The Side View Instant Center (sometimes shortened down to "IC") is involved. Basically the torque you're applying against the brakes is pulling the rear down through the rear suspension's side view geometry.

What happens when you go to 'D' from 'N' instead of from 'P', and do you still have to have your foot on the brake pedal to go from 'N'?


Norm

This is normal for automatics with a v8 if you let the idle come down before you put it in drive when its cold started it will make it less noticable.

and its normal too

It has been a while since I have had a Mustang, I guess it is more prevalent with them. As some said it may be how loose the read end of the Mustang is compared to other cars. The squat has increased with more mileage but that may be the suspension of the Mustang breaking in??

Haven't had the same kind of squat from any of our past/current RWD performance cars (Corvette & BMW).

It's more noticeable in cars with independent rear suspension. All of my Corvette's did/does the squat. We just got the wife's Mustang home today, didn't notice it squat, but I may just be used to it after driving plastics cars for so long.

The 'squat' has become even worse now to the point that it will jar you with the initial violent squat and then bounce 4 to 6 times after the initial squat. If you are looking at the car from outside it looks like I am running an air suspension and purposefully doing it.

Unfortunately it looks like I will be bringing it in for the dealer to take a look.

smbsocal said:

The 'squat' has become even worse now to the point that it will jar you with the initial violent squat and then bounce 4 to 6 times after the initial squat. If you are looking at the car from outside it looks like I am running an air suspension and purposefully doing it.

Unfortunately it looks like I will be bringing it in for the dealer to take a look.

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Since yours seems to be such an extreme, I would bring it in to the dealer as well. That is not normal at all.

:doh: :headbonk: :frusty: :tsk:

smbsocal said:

The 'squat' has become even worse now to the point that it will jar you with the initial violent squat and then bounce 4 to 6 times after the initial squat. If you are looking at the car from outside it looks like I am running an air suspension and purposefully doing it.

Unfortunately it looks like I will be bringing it in for the dealer to take a look.

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That might be a cool youtube video. Just saying.... :lol:

Tell the dealers "you've got squatters rights" before he fixes anything.

Is this first RWD automatic you ever owned?

smbsocal said:

The 'squat' has become even worse now to the point that it will jar you with the initial violent squat and then bounce 4 to 6 times after the initial squat. If you are looking at the car from outside it looks like I am running an air suspension and purposefully doing it.

Unfortunately it looks like I will be bringing it in for the dealer to take a look.

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The ONLY way I can imagine that happening is if both rear shocks are almost completely dead. Or broken free at one end or the other. Look under there yourself before bringing it in.


Norm