The Fox Body Lean

Get under the car and inspect the bushings in the control arms. If they are failing, it could cause a sag to the side

If you notice, most leaning cars are going to the drivers side.


I was reading a thread om another forum last night where there was a tsb posted which placed the blame on the drivers side front spring softening due to weight and recommended it's replacement,

I know that this doesn't cure all as some guys change all 4 springs and it still leans.



90ford47
SPRINGS - VEHICLE LEAN - APPLICATION CHARTS - EXCLUDES "SALEEN" MODELS
Article No. 90-26-3
FORD: 1989-90 MUSTANG
ISSUE: Vehicles may have a tendency to lean to the left because the location of the battery, windshield washer bottle, radiator expansion bottle and engine accessory drive may cause a weight bias on the left front side. This lean condition most often appears as a lean in the rear of the vehicle rather than the front.

ACTION: Check the wheel lip measurement and, if required, install a new left front spring to restore the vehicle to a more level attitude. The front spring is to be changed, even if the lean is greater in the rear of the vehicle. Refer to the following procedure for service details.
Figure 1

1. Place the vehicle on level ground.

2. Take all measurements from the ground to the body wheel lips as close to the axle center line as possible, Figure 1.

3. Determine the difference of the front wheel lip measurements by substracting the low from the high measurement. Using the following Wheel Lip Measurement Chart. select the correct spring load change (i.e. plus 1. plus 2) within the rate group.

4. After determining the correct spring change (i.e. plus 1 or plus 2) find the three letter tape code located on the front spring of the side that exhibits the lean and select the replacement spring using the following charts.


The following 1989-1990 Mustang Rear Spring Chart is provided for general informational purposes only. Generally, the rear springs will not have to be replaced unless there is damage or structural concerns.

(*) Code is also in Parts Book.

5. Remeasure the vehicle as described in Steps 1 and 2. Confirm that the vehicle is in specification per the Wheel Lip Measurement Chart. If the vehicle is not to specification (0.00" +/- 0.20"), repeat Step 3 through 5.

Within a rate group, installing a high load spring will increase the vehicle ride height. Conversely, a lower load spring will decrease the vehicle ride height. The following Spring Change Bumper Effect Chart indicates an approximate change in bumper-to-ground height for each increment of spring change.

OTHER APPLICABLE ARTICLES: None

WARRANTY STATUS: Eligible Under Basic Warranty Coverage
OPERATION DESCRIPTION TIME
902603A Replace Spring 1.2 Hr.
DEALER CODING
BASIC PART NO. CONDITION CODE
5310 63
OASIS CODES: 304000