Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSFORD1975MUSTANG II BASE, 2D HATCHBACK, 2.3L ENG VIN Y, AUTOMATIC TRANSREPAIR AND DIAGNOSISSUSPENSIONSUSPENSION CONTROL SYSTEMSAUTOMATIC LEVEL CONTROLTESTING & ADJUSTMENTHEIGHT CONTROL VALVEFUNCTION TESTING
1975 Ford Mustang II Base, 2D Hatchback, 2.3L Eng VIN Y, Automatic Trans
Function Testing
1975 Ford Mustang II Base, 2D Hatchback, 2.3L Eng VIN Y, Automatic TransSECTION Function Testing
- Disconnect overtravel lever from link. Exhaust air from shocks by holding lever down until air sleeves deflate. Start engine and run at idle. Pressurize system with external source to 90 psi. Hold lever down in exhaust position until sleeves deflate. If sleeves do not deflate, remove exhaust adaptor from control valve and hold lever down to deflate sleeves. If sleeves now deflate, replace adaptor, "O" ring, and filter. If defective condition is not corrected by these replacements, replace height control valve.
- Hold lever up in intake position until sleeves inflate. If sleeves inflate and hold, proceed to TIME DELAY TEST . If sleeves inflate, then leak down, check lines, fittings, and sleeves for air leaks. If sleeves still do not inflate, perform LEAK TEST .
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.