A Deep Dive into the 1982-1988 Chevrolet S10 Automatic Transmission Mount
Don't let a bad transmission mount cause clunks, vibrations, or bigger problems in your classic S10.
- Common symptoms of failure are clunking noises when shifting, and new vibrations felt in the cabin.
- Aftermarket mounts are either standard rubber (like Anchor) or durable polyurethane upgrades (like Prothane).
- Standard rubber mounts are cheap but quality can be inconsistent; polyurethane is a popular, durable upgrade but may increase vibration.
- Replacement is a simple, DIY-friendly job that can be completed in under an hour with basic tools.
Is Your S10's Transmission Mount Failing?
Because they are made of rubber that degrades over time, transmission mounts are a common wear item on older trucks like the first-generation S10. When a mount fails, it can no longer properly support the transmission or absorb vibrations. This leads to several noticeable symptoms.
The most common signs are clunking or thumping noises, especially when you shift from park into drive or reverse, or during hard acceleration. You might also feel excessive vibrations through the floor or seat, particularly while idling or driving. In some cases, you may even be able to see the transmission move or rock excessively if a helper shifts the truck between drive and reverse while you observe from the side.
Choosing the Right Aftermarket Mount for Your S10
Since original GM parts for this truck are often discontinued and hard to find, the aftermarket is your go-to source. For the 1982-1988 S10, you have two main choices: standard rubber replacements or polyurethane upgrades.
Standard Replacement Rubber Mounts
Brands: Anchor, DEA, Westar, Pioneer Cable, Skyward
These mounts are designed to be direct replacements for the original factory part. They use rubber to absorb vibrations, aiming for a stock-like ride quality. They are the most affordable option.
- Pros: Low cost, designed for original ride comfort.
- Cons: Quality can be inconsistent with budget brands. Some owners report these mounts failing prematurely or causing more vibrations than a quality OEM part. One S10 owner on a forum noted significant dissatisfaction with an Anchor brand mount, stating they "hated my truck until I found an oem mount".
Performance Polyurethane Mounts
Brands: Prothane, Lakewood, Energy Suspension
Polyurethane is a much stronger and more durable material than rubber. These mounts are considered a performance upgrade because they control transmission movement much more firmly. They are a popular choice for durability.
- Pros: Extremely durable and long-lasting. One user on a forum reported getting 10 years and 100,000 miles out of a urethane mount on a similar S10. Better power transfer as the transmission cannot twist as much.
- Cons: They are stiffer and transmit more drivetrain vibration and noise into the cabin compared to new rubber mounts. This is a trade-off for the added performance and durability.
Pro-Tip: Which Should You Choose?
If you use your S10 as a daily driver and want the quietest, smoothest ride possible, a quality rubber mount is a good choice, though finding a high-quality one is key. If you prioritize durability, performance, or have a modified engine, a polyurethane mount from a brand like Prothane is a highly recommended, long-term solution, as long as you can tolerate a potential increase in cabin vibration.
Known Issues, Recalls, and Service Bulletins
Searches of the National Highway Traffic Safety Administration (NHTSA) database and other technical resources did not find any specific recalls or Technical Service Bulletins (TSBs) for the automatic transmission mount on the 1982-1988 Chevrolet S10. Failures are typically due to the age and natural degradation of the rubber.
| Part Type | Estimated Cost |
|---|---|
| New Aftermarket (Rubber) | $11 - $20 |
| New Aftermarket (Polyurethane) | $25 - $35 |
| Shop Labor for Installation | $100 - $180 |
| New OEM | Varies / Often Discontinued |
Frequently Asked Questions
What's the difference between a rubber and polyurethane mount?
Rubber is softer and better at absorbing vibrations for a comfortable ride, but it wears out faster. Polyurethane is a much tougher plastic that offers superior durability and performance by limiting movement, but it can transmit more vibration and noise into the vehicle.
Is it safe to drive with a bad transmission mount?
You can drive for a short time, but it's not recommended. A broken mount puts extra stress on your engine mounts, driveshaft, U-joints, and exhaust system. In a worst-case scenario, severe movement could cause damage to other components, so it should be replaced as soon as possible.
How do I check if my transmission mount is bad?
Look for cracks, splits, or separation in the rubber part of the mount. You can also have a helper sit in the truck with the parking brake on, start the engine, and shift from Drive to Reverse while you watch the transmission from a safe distance. If you see the transmission lift or move excessively, the mount is likely bad.
Is replacing the S10 transmission mount a difficult job?
No, for a rear-wheel-drive truck like the S10, this is a relatively easy job for a DIY mechanic. It involves safely supporting the transmission with a jack, unbolting the old mount from the crossmember and transmission, and bolting the new one in place. It typically takes less than an hour.
Technical Specifications
OEM Part Numbers: 15597873 14039382
Standard design for this era is a rectangular mount with two bolts that attach to the transmission crossmember and a single, central stud that attaches to the transmission tailshaft housing.
We Have This Part in Stock
The information in this article is provided for general reference and educational purposes only. Vehicle specifications, procedures, and part compatibility can vary by production date, trim level, and region. Always consult your vehicle's factory service manual and verify part numbers before purchasing or performing repairs. Safety-critical components such as airbags, seat belts, and braking systems should be installed by a qualified professional.
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