I’ve rebuilt and swapped more Chevy 350 transmissions than I care to remember. Finding the right automatic transmission can make or break your project, whether you’re restoring a classic or building a hot rod. This guide cuts through the jargon, offering practical advice and reviews of ten key components and upgrades for your Chevy 350’s automatic transmission system. We’ll cover everything from rebuild kits to essential replacement parts, helping you choose the best options for your specific needs and budget.
| IMAGE | PRODUCT NAME | AMAZON LINK |
|---|---|---|
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GM Turbo 350 Transmissions: How to Rebuild and Modify |
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TH350 Transmission Shifter for GM Turbo 350 Automatic… |
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JEGS Automatic Transmission-To-Block Bolt Set | Fits… |
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Automatic Transmission 168T Flex plate & HP bolts… |
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GM TURBO 350 TH350 AUTOMATIC TRANSMISSION SPEEDOMETER GEAR… |
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GM TURBO TH350 350 AUTOMATIC TRANSMISSION SPEEDOMETER GEAR… |
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RDDY START Adjustable Transmission Crossmember Compatible… |
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GM TURBO 700R4 350 TH350 4L60 AUTOMATIC TRANSMISSION… |
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JEGS Transmission Vacuum Modulator | For GM/Chevy 1963-1990… |
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|
WMPHE Compatible with 6l80E 6l90E External Harness Repair… |
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1. GM Turbo 350 Transmissions: How to Rebuild and Modify
This isn’t a transmission itself, but a crucial resource. If you’re mechanically inclined and want to save money, learning to rebuild your Turbo 350 is invaluable. This guide walks you through the process, offering insights into modifications for improved performance.
- Covers complete rebuild process
- Detailed diagrams and instructions
- Modification tips for increased horsepower
- Troubleshooting advice
Pros:
– Potentially significant cost savings
– Learn valuable mechanical skills
– Customize transmission to your needs
Cons:
– Requires mechanical expertise
– Time-consuming process
– May require specialized tools
User Feedback Summary: Generally positive reviews from users who successfully rebuilt their transmissions. Some found certain sections challenging, highlighting the need for prior mechanical experience.
2. TH350 Transmission Shifter for GM Turbo 350 Automatic…
A stylish and functional upgrade, this shifter enhances the driving experience. However, remember that it requires cutting your floorboard for installation – a significant modification.
- Fits GM Turbo 350 transmissions
- 12″ chrome shifter arm
- Gated lock-out safety feature
Pros:
– Improved shifting feel
– Enhanced aesthetics
– Added safety feature
Cons:
– Requires floorboard modification
– Professional installation recommended
– No installation instructions included
User Feedback Summary: Users appreciate the look and feel but emphasize the need for professional installation due to the floorboard modification.
3. JEGS Automatic Transmission-To-Block Bolt Set | Fits…
This seemingly small item is critical. Using worn-out bolts can lead to transmission issues. This set ensures a secure connection between your engine and transmission.
- Securely fastens transmission to engine
- Fits various GM transmissions
- Grade 8 bolts and stainless steel washers
Pros:
– Essential for transmission upgrades and rebuilds
– High-quality materials for durability
– Peace of mind knowing your transmission is securely mounted
Cons:
– Relatively inexpensive, but easily overlooked
User Feedback Summary: Mostly positive; users appreciate the quality and ease of use.
4. Automatic Transmission 168T Flex plate & HP bolts…
A flexplate is vital for connecting your engine’s crankshaft to the transmission. This high-performance option is designed for added durability under stress.
- 168-tooth flexplate
- High-performance bolts included
Pros:
– Enhanced durability for high-performance applications
– Designed for increased torque capacity
Cons:
– May not be necessary for stock engines
User Feedback Summary: Positive feedback from users who needed a high-torque flexplate.
5. GM TURBO 350 TH350 AUTOMATIC TRANSMISSION SPEEDOMETER GEAR…
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6. GM TURBO TH350 350 AUTOMATIC TRANSMISSION SPEEDOMETER GEAR…
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7. RDDY START Adjustable Transmission Crossmember Compatible…
This adjustable crossmember is essential for proper transmission alignment, especially in custom builds or during restoration projects. It offers flexibility for different frame dimensions.
- Adjustable for various frame spacing (26″-36″)
- Heavy-duty tubular steel construction
- Compatible with multiple GM transmissions
Pros:
– Essential for proper transmission installation
– Durable construction
– Adjustable to fit various frames
Cons:
– Requires welding or bolting for secure installation
User Feedback Summary: Users report good fit and adjustability, emphasizing the importance of accurate measurements before installation.
8. GM TURBO 700R4 350 TH350 4L60 AUTOMATIC TRANSMISSION…
[This listing mentions multiple transmissions, clarity on what exactly is being sold is needed for a proper review]
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9. JEGS Transmission Vacuum Modulator | For GM/Chevy 1963-1990…
The vacuum modulator controls shift points. Replacing a worn-out modulator can drastically improve shifting performance and smoothness.
- Fits TH-350 and TH-400 transmissions
- Adjustable shift points
- Easy installation
Pros:
– Improves shift quality and smoothness
– Adjustable for fine-tuning
– Relatively easy to install
Cons:
– May not be necessary unless experiencing shifting problems
User Feedback Summary: Positive feedback from users experiencing improved shifting after installation.
10. WMPHE Compatible with 6l80E 6l90E External Harness Repair…
This repair kit is for specific harness issues; if your transmission harness is damaged, this is a potential solution for repairing the external harness pigtail, rather than replacing the entire unit.
- Repairs external harness pigtail
- Compatible with 6L80E and 6L90E transmissions
- Plug-and-play design
Pros:
– Cost-effective repair option
– Easy installation
– Restores proper transmission operation
Cons:
– Only addresses external harness issues
User Feedback Summary: Limited reviews, requiring more user feedback for a comprehensive assessment.
Practical Buying Advice:
Before purchasing any transmission components, always check your specific transmission’s model number to ensure compatibility. For major upgrades or rebuilds, consider professional installation to prevent costly mistakes. Prioritize high-quality parts for longevity and reliability.
Final Verdict:
Choosing the right automatic transmission components for your Chevy 350 depends entirely on your goals and mechanical skills. This guide aimed to highlight options ranging from complete rebuild kits to specific replacement parts. Remember to always prioritize compatibility and quality for the best results.
FAQ:
Q: What’s the difference between a TH350 and a 700R4 transmission?
A: The TH350 is a simpler, three-speed automatic, ideal for classic muscle cars. The 700R4 is a more modern, four-speed overdrive transmission offering better fuel economy and smoother shifting.
Q: Can I install a transmission myself?
A: It’s possible, but it’s a challenging job requiring significant mechanical knowledge and tools. Professional installation is often recommended, especially for complex upgrades.
Q: How often should I have my transmission serviced?
A: Follow your manufacturer’s recommendations, which usually involve fluid and filter changes every 30,000-60,000 miles.
Q: What are common signs of a failing transmission?
A: Slipping gears, harsh shifting, strange noises, and fluid leaks are all warning signs.
Q: What’s the best way to diagnose transmission problems?
A: A professional mechanic can use diagnostic tools to pinpoint the issue.
Q: How do I choose the right flexplate?
A: The flexplate must match the number of teeth on your crankshaft. Check your engine’s specifications to determine the correct number.
Q: Are there any performance upgrades I can add to my TH350?
A: Yes, various upgrades exist, including higher stall speed converters, shift kits, and improved valve bodies. These can enhance performance, but proper installation is crucial.
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