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 MANUALSCHEVROLET1985ASTRO VAN M L4-151 2.5LREPAIR AND DIAGNOSISTECHNICAL SERVICE BULLETINSALL TECHNICAL SERVICE BULLETINSA/T - DELAYED FORWARD ENGAGEMENT/BURNT 3-4 CLUTCHES
1985 Chevrolet Astro Van M L4-151 2.5L
A/T - Delayed Forward Engagement/Burnt 3-4 Clutches
1985 Chevrolet Astro Van M L4-151 2.5LSECTION A/T - Delayed Forward Engagement/Burnt 3-4 Clutches
DATE: 1996
TECHNICAL BULLETIN # 334
TRANSMISSION: 4L60 & 4L60-E
SUBJECT: Delayed forward engagement, burnt 3-4 and/or overrun clutches
APPLICATION: GM
4L60 and 4L60-E
These conditions can be caused by low line pressure or worn internal parts. However, if none of these problems are found, check the stator support for the oil passage sleeve rotating in the support (figures 1 and 2).
Using a 4 mm allen wrench, insert the wrench into the TCC release hole (figures 3 and 4). If the wrench does not drop into the feed hole, the sleeve has rotated and blocked the oil passages, and the stator must be replaced.
TECHNICAL BULLETIN # 334
TRANSMISSION: 4L60 & 4L60-E
SUBJECT: Delayed forward engagement, burnt 3-4 and/or overrun clutches
APPLICATION: GM
4L60 and 4L60-E
These conditions can be caused by low line pressure or worn internal parts. However, if none of these problems are found, check the stator support for the oil passage sleeve rotating in the support (figures 1 and 2).
Using a 4 mm allen wrench, insert the wrench into the TCC release hole (figures 3 and 4). If the wrench does not drop into the feed hole, the sleeve has rotated and blocked the oil passages, and the stator must be replaced.
RENDER: 1.0x
NO RELATED
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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.