Jeep CJ5 Transmission For Sale: A Comprehensive Guide to Finding the Right Gearbox

Jeep CJ5 Transmission For Sale: A Comprehensive Guide to Finding the Right Gearbox jeeps.truckstrend.com

The Jeep CJ5, an iconic symbol of rugged individualism and off-road prowess, holds a special place in the hearts of automotive enthusiasts. From its early military roots to its civilian evolution, the CJ5 represented freedom and adventure. However, like any vintage vehicle, maintaining a CJ5 often involves addressing its core mechanical components, and few are as critical as the transmission. Whether you’re restoring a classic, upgrading for enhanced performance, or simply replacing a worn-out unit, the quest for a "Jeep CJ5 Transmission For Sale" can be a challenging yet rewarding journey.

This comprehensive guide aims to illuminate the landscape of CJ5 transmissions, offering insights into types, where to buy, crucial considerations, and practical advice to ensure you make an informed decision that keeps your beloved Jeep shifting smoothly for years to come.

Jeep CJ5 Transmission For Sale: A Comprehensive Guide to Finding the Right Gearbox

Understanding the CJ5 Transmission Landscape

The Jeep CJ5 was produced for an impressive 29 years, from 1955 to 1983. During this long production run, it saw a variety of engines and, consequently, a diverse range of manual transmissions. Understanding which transmission originally came with your CJ5, and the options for replacement or upgrade, is the first step in your search.

Original Equipment Manual Transmissions:

• Warner T-90 (1955-1971): A robust, non-synchronized 3-speed manual, often paired with the F-head Hurricane and Dauntless V6 engines. Known for its durability but lacks highway-friendly gearing.
• Warner T-86 (1966-1971): A synchronized 3-speed, sometimes found with the Dauntless V6. Offers smoother shifting than the T-90.
• Borg-Warner T-14 (1972-1975): A synchronized 3-speed used with the AMC 232 and 258 I6 engines. A decent workhorse for its time.
• Borg-Warner T-150 (1976-1979): A synchronized 3-speed, often found with the AMC 258 I6 and 304 V8. A relatively common and sturdy unit.



• Borg-Warner T-18 (1972-1979): A heavy-duty, synchronized 4-speed with a very low first gear ("granny gear"). Primarily used with the AMC 304 V8 and 258 I6, it’s highly sought after for off-roading due to its strength and crawling capabilities.
• Tremec T-176 (1980-1981): A synchronized 4-speed, typically paired with the AMC 258 I6. A good all-around transmission offering better highway manners than older 3-speeds.
• Borg-Warner SR4 (1980-1981): A lightweight 4-speed manual, often found with the AMC 2.5L 4-cylinder engine. Not known for its strength, especially in demanding off-road conditions.
• Borg-Warner T-4 & T-5 (1982-1983): The T-4 is a 4-speed, and the T-5 is a 5-speed manual with overdrive. Both were used with the AMC 258 I6 and offer improved highway fuel economy and comfort. The T-5 is generally preferred for its overdrive.

Why the Search for a Replacement?

Over decades of use, even the most robust transmissions can wear out. Common reasons for seeking a replacement include:

• Wear and Tear: Gears, bearings, and synchronizers eventually fail, leading to grinding, difficulty shifting, or complete loss of gears.
• Abuse/Damage: Hard off-roading, towing beyond capacity, or improper maintenance can cause premature failure.



• Upgrades: Many owners seek to replace their original 3-speed transmissions with a 4-speed or 5-speed unit for better highway performance, stronger off-road crawling, or improved fuel economy.
• Restoration: For a complete restoration, finding a period-correct, fully functional transmission is essential.

Where to Find Jeep CJ5 Transmissions For Sale

The market for vintage Jeep parts is vibrant, offering several avenues for finding a CJ5 transmission. Each option comes with its own set of advantages and disadvantages.

1. Online Marketplaces (eBay, Craigslist, Facebook Marketplace):
   • Pros: Wide selection, potential for good deals, local pickup options.
   • Cons: "Buyer beware" scenario, condition can be misrepresented, no warranty, shipping can be expensive for heavy items.
2. Specialized Jeep Parts Dealers (e.g., Quadratec, Morris 4×4 Center, Omix-ADA, Crown Automotive):
   • Pros: Reputable sources, often offer new, rebuilt, or remanufactured units, warranties available, knowledgeable staff.
   • Cons: Generally higher prices than used units, may not carry every vintage option.
3. Junkyards and Salvage Yards:
   • Pros: Potentially very cheap, opportunity to inspect in person.
   • Cons: "As-is" condition, no warranty, requires extensive knowledge to assess quality, finding specific models can be hit-or-miss.
4. Dedicated Jeep Forums and Owner Groups (e.g., JeepForum.com, CJ-8.com):
   • Pros: Connect directly with other enthusiasts who may be selling parts, valuable advice, community support.
   • Cons: Similar to online marketplaces regarding condition and warranty.
5. Professional Transmission Rebuilders:
   • Pros: High-quality rebuilt units, often come with a warranty, expertise in vintage transmissions.
   • Cons: Most expensive option, but often the most reliable for a "new" old transmission. They might also rebuild your existing unit.

Key Considerations When Buying a CJ5 Transmission

Purchasing a transmission, especially for a vintage vehicle, requires careful consideration. Rushing into a purchase can lead to costly mistakes.

1. Compatibility is Paramount:
   • Engine: Ensure the transmission’s bell housing bolt pattern matches your engine (e.g., AMC I6/V8, Dauntless V6, Ford 302 swap).
   • Transfer Case: The CJ5 used several transfer cases (Dana 18, Dana 20, Dana 300). Your transmission’s output shaft must mate correctly with your transfer case input. Some swaps require adapter kits.
   • Spline Count: Output shaft spline count must match the transfer case input.
   • Input Shaft Length/Pilot Bearing: Crucial for proper clutch and crankshaft alignment.
   • Shifter Location: While often adjustable or replaceable, consider where the shifter will land in your CJ5’s cabin.
2. Condition Assessment (Especially for Used Units):
   • Leaks: Check for oil stains or residue, indicating worn seals or cracks.
   • Shaft Play: Excessive play in input or output shafts can indicate worn bearings.
   • Shifting Action (if possible): If the unit is still in a vehicle, test all gears, including reverse. Listen for grinding or difficulty engaging.
   • Fluid Quality: If you can drain a little fluid, dark, burnt-smelling fluid or metallic flakes indicate internal wear.
   • Cracks/Damage: Visually inspect the casing for any signs of physical damage.
3. Warranty and Returns:
   • New and professionally rebuilt transmissions usually come with a warranty (e.g., 90 days to 1 year). This provides peace of mind.
   • Used transmissions are almost always sold "as-is," so factor that risk into the price.
4. Price vs. Value:
   • A cheaper used transmission might seem appealing, but if it needs a full rebuild, the total cost could exceed a professionally rebuilt unit.
   • Consider the total cost of ownership, including potential future repairs or the need for adapters if upgrading.
5. Desired Use and Future Plans:
   • Restoration: You’ll likely want a period-correct, possibly rebuilt, original transmission.
   • Daily Driver/Light Off-roading: A T-176 or T-5 (with an adapter) offers a good balance of strength and highway comfort.
   • Heavy Off-roading/Rock Crawling: The T-18 is a legendary choice for its low gearing and brute strength. More modern heavy-duty swaps (like an AX-15 or NV3550) are also options.

Types of CJ5 Transmissions For Sale: Stock Replacements vs. Upgrades

Your search will generally fall into two categories: finding a direct stock replacement or opting for an upgrade/swap.

Stock Replacements:
These aim to put the exact type of transmission back into your CJ5 that it originally came with. This is ideal for purists or those wanting to maintain originality. Finding these often involves scouring junkyards, online forums, or contacting specialized vintage Jeep parts suppliers who might have rebuilt units.

Upgrades & Swaps:
This is a popular route for CJ5 owners looking to improve performance, driveability, or strength. Common swaps include:

• T-18 (4-speed): A very popular upgrade for 3-speed CJ5s, offering superior strength and a low "granny" first gear for off-roading. Requires bell housing and possibly transfer case adapter modifications depending on the original setup.
• T-176 (4-speed): A good balance of strength and better road manners than the T-18. Often a straightforward swap if your CJ5 had a T-150.
• T-5 (5-speed with Overdrive): Provides an overdrive gear for better highway cruising and fuel economy. While not as strong as the T-18, it’s a popular choice for daily drivers. Requires an adapter to mate with the Dana 300 transfer case (or other TCs).
• AX-15 / NV3550 (5-speed with Overdrive): These are modern, stronger 5-speed transmissions commonly found in later Jeeps (YJ, TJ). They offer excellent highway manners and durability. However, they require significant modifications, including adapter plates for the engine and transfer case, new shifter, and possibly driveline changes. This is a more involved and costly swap.

Installation & Maintenance Tips

• Professional vs. DIY: Replacing a transmission is a labor-intensive job. If you’re not an experienced mechanic, consider professional installation. It ensures proper alignment, fluid levels, and clutch adjustment.
• Clutch Assembly: Always inspect and consider replacing the clutch, pressure plate, pilot bearing, and throw-out bearing when swapping a transmission. It’s much easier to do it while the transmission is out.
• Fluid Type: Use the correct transmission fluid specified by the manufacturer (or the rebuilder for aftermarket units). Using the wrong fluid can cause premature wear.
• Maintenance: Regularly check fluid levels and change fluid according to your vehicle’s maintenance schedule (or more frequently for heavy use). Address any leaks promptly.

Potential Challenges and Solutions

• Finding Rare Parts: Some early CJ5 transmissions are becoming increasingly rare. Solution: Expand your search to forums, dedicated vintage Jeep groups, or consider a more common upgrade swap.
• Unreliable Sellers: Buying used can be risky. Solution: Ask for detailed photos, videos of the unit (if possible), and references. Use platforms with buyer protection if available.
• Budget Constraints: Transmissions can be expensive. Solution: Prioritize needs (e.g., used for a budget build vs. rebuilt for reliability). Consider a rebuild of your existing unit if the casing is sound.
• Complex Installations: Swapping to a different transmission type often involves adapters, driveline modifications, and custom fabrication. Solution: Research thoroughly, consult with experienced mechanics, or hire a professional.

Jeep CJ5 Transmission For Sale: Estimated Price Guide

This table provides a general estimate of prices for various CJ5 transmission options. Actual prices will vary widely based on condition, seller, location, availability, and market demand. Always get a detailed quote.

Transmission Type/Condition	Engine Compatibility (Common)	Transfer Case Compatibility (Common)	Estimated Price Range (USD)	Notes
Original Used (As-Is)
T-90 (3-speed)	F-head, Dauntless V6	Dana 18, Dana 20	$200 – $600	High risk; likely needs rebuild.
T-14 (3-speed)	AMC I6	Dana 20	$250 – $700	High risk; likely needs rebuild.
T-150 (3-speed)	AMC I6, AMC V8	Dana 20	$300 – $800	High risk; likely needs rebuild.
T-18 (4-speed)	AMC I6, AMC V8	Dana 20, Dana 300	$500 – $1,200	Popular for strength; used units still valuable.
T-176 (4-speed)	AMC I6	Dana 300	$400 – $900	Good stock upgrade; often in better shape.
T-5 (5-speed)	AMC I6	Dana 300	$500 – $1,000	Overdrive benefit; can be weaker.
Professionally Rebuilt
T-90 (3-speed)	F-head, Dauntless V6	Dana 18, Dana 20	$800 – $1,500	Includes new internals, seals, bearings; with warranty.
T-14 / T-150 (3-speed)	AMC I6, AMC V8	Dana 20	$900 – $1,600	With warranty.
T-18 (4-speed)	AMC I6, AMC V8	Dana 20, Dana 300	$1,200 – $2,500	High demand; excellent strength; with warranty.
T-176 (4-speed)	AMC I6	Dana 300	$1,000 – $1,800	Good all-around option; with warranty.
T-5 (5-speed)	AMC I6	Dana 300	$1,100 – $2,000	Overdrive; with warranty.
Upgrade Swaps (Transmission Only)				Does not include adapter kits, custom driveshafts, etc.
AX-15 (5-speed)	Various (with adapters)	Dana 300 (with adapters)	$700 – $1,500	Strong modern option; requires adapters.
NV3550 (5-speed)	Various (with adapters)	Dana 300 (with adapters)	$800 – $1,600	Similar to AX-15; requires adapters.
Adapter Kits (Estimated)	(Not included in transmission price)	(For common swaps)	$300 – $1,000+	Varies by specific engine/trans/TC combo.

Frequently Asked Questions (FAQ)

Q1: What’s the best transmission for a CJ5?
A1: There’s no single "best." It depends on your primary use. For heavy off-roading, a T-18 is favored. For a balance of off-road and highway, a T-176 or T-5 is excellent. For maximum highway comfort and fuel economy, a T-5 or a modern 5-speed swap (AX-15/NV3550) is ideal.

Q2: Can I put an automatic transmission in a CJ5?
A2: Yes, it’s possible with a conversion kit and the appropriate automatic transmission (e.g., a TF999 or 700R4). This is a more involved and costly swap than a manual-to-manual change.

Q3: How much does a CJ5 transmission cost?
A3: Prices range from a few hundred dollars for an "as-is" used unit to over $2,500 for a professionally rebuilt, heavy-duty option or a strong modern upgrade (transmission only). Adapter kits and installation costs are additional.

Q4: Are adapter kits always needed for transmission swaps?
A4: Most significant transmission upgrades (especially modern 5-speeds like AX-15 or NV3550) will require adapter kits to mate with your engine’s bell housing and your transfer case. Even some stock-type upgrades might need different bell housings or input shafts.

Q5: How do I know if my CJ5 transmission is bad?
A5: Common symptoms include grinding gears, difficulty shifting, popping out of gear, unusual noises (whining, clunking), fluid leaks, or a burning smell. A professional diagnosis is recommended.

Q6: Should I rebuild my existing transmission or buy a new/rebuilt one?
A6: If your transmission casing is in good condition and only needs new internals, a rebuild can be a cost-effective solution, especially if you have a rare or specific unit. If the casing is cracked, heavily damaged, or you want a different transmission type, buying a new/rebuilt unit or performing a swap is better.

Conclusion

The journey to find the perfect "Jeep CJ5 Transmission For Sale" is an integral part of maintaining, restoring, or upgrading these beloved classic vehicles. From understanding the historical lineup of original transmissions to navigating the modern market of stock replacements and performance upgrades, informed decision-making is key. By carefully considering compatibility, condition, and your intended use, coupled with diligent research into reputable sellers and installers, you can ensure your CJ5 continues to offer the reliable, go-anywhere spirit it’s famous for. With the right gearbox, your iconic CJ5 will be ready for many more miles of adventure, on or off the beaten path.