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

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

The Jeep CJ5, an icon of American automotive ruggedness, represents an era of go-anywhere capability and unadulterated driving pleasure. For decades, these compact, open-top vehicles have traversed trails, climbed mountains, and delivered countless adventures. However, like any mechanical marvel, the CJ5’s heart – its transmission – is subject to wear, tear, and the ravages of time. For enthusiasts and owners dedicated to keeping these legends on the road (or off it), the need for a "Jeep CJ5 Transmission For Sale" is a common and critical quest.

This article serves as your definitive guide to navigating the complexities of acquiring, understanding, and installing a transmission for your beloved CJ5. Whether you’re dealing with grinding gears, a complete failure, or planning an upgrade for enhanced performance, finding the right gearbox is paramount to preserving the spirit and functionality of this classic American off-roader.

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

Why a CJ5 Transmission Might Be Needed: Understanding the Common Issues

Over its extensive production run from 1955 to 1983, the Jeep CJ5 saw various transmissions. While built to be robust, decades of use, often in harsh off-road conditions, take their toll. Common reasons for needing a replacement or rebuild include:

• Age and Wear: Bushings, bearings, and synchros wear out, leading to noisy operation, difficulty shifting, or gears popping out.
• Fluid Neglect: Lack of proper maintenance, incorrect fluid types, or low fluid levels can cause premature wear and overheating.
• Hard Use/Abuse: Aggressive off-roading, heavy towing, or inexperienced drivers can stress internal components beyond their limits.
• Accidental Damage: Physical impact to the transmission housing or external components.
• Leaks: Worn seals and gaskets can lead to fluid loss, eventually causing internal damage.



• Performance Upgrades: Swapping to a more modern or heavy-duty transmission to accommodate engine upgrades or more demanding off-road use.

Addressing these issues promptly is crucial, as a failing transmission can leave you stranded and potentially damage other drivetrain components like the transfer case or engine.

Understanding Jeep CJ5 Transmission Types: A Crucial Match

The CJ5 utilized a variety of manual transmissions throughout its production. Identifying your current transmission or understanding which types are compatible with your CJ5’s year and engine is the first critical step. Here’s a rundown of the most common manual transmissions found in CJ5s:

• Borg-Warner T-90 (1955-1971): This robust 3-speed manual was a staple for early CJ5s. It’s known for its simplicity and durability, often paired with the Hurricane F-head and Dauntless V6 engines. Finding parts can be challenging, but many are still serviceable.
• Borg-Warner T-86 (Limited Use, Late 60s): Another 3-speed, often found in V6 models. Similar to the T-90 but with some internal differences.
• Borg-Warner T-14 (Early 1970s): A 3-speed manual, often paired with the AMC 232 and 258 straight-six engines. It’s a moderately strong unit.
• Borg-Warner T-15 (Early 1970s): A heavy-duty 3-speed manual, primarily used with the AMC V8 engines (304, 360) and some 258 six-cylinders. It’s a stout transmission, favored for its strength.



• Borg-Warner T-18 (Mid-1970s to 1983): This highly sought-after 4-speed manual is legendary for its incredibly low first gear (often 6.32:1 or even 4.02:1). It’s a heavy-duty unit, popular for serious off-roading due to its excellent crawl ratio. Many T-18s were factory-installed with the AMC 258 six-cylinder and 304 V8 engines.
• Tremec T-176 (Late 1970s to 1983): A 4-speed manual, offering a wider gear ratio spread than the T-18’s low first. It’s a good all-around transmission for street and light off-road use, commonly paired with the 258 six-cylinder.
• Borg-Warner T-4 & T-5 (Early 1980s): These lighter-duty 4-speed (T-4) and 5-speed (T-5) manuals were introduced in the later CJ5 years. The T-5, with its overdrive fifth gear, offered better fuel economy on the highway. However, they are generally considered less robust than the T-18 or T-176 for heavy off-road abuse.

Important Consideration: Transmission compatibility isn’t just about the number of speeds. You must consider:

• Bell Housing Bolt Pattern: This must match your engine.
• Input Shaft Length and Spline Count: Must match your clutch and pilot bearing.
• Output Shaft Spline Count and Bolt Pattern: Must match your transfer case.
• Shifter Location: Ensure it aligns with your CJ5’s floor opening.

Many modern aftermarket adapters exist to mate different transmissions to various engines and transfer cases, but these add to the overall cost and complexity.

Where to Find a Jeep CJ5 Transmission For Sale

The search for a CJ5 transmission can lead you down several paths, each with its own advantages and disadvantages:

1. Online Marketplaces (eBay, Craigslist, Facebook Marketplace): These platforms are goldmines for used parts. You can often find complete transmissions, sometimes still bolted to an engine or transfer case. Pros: Wide selection, competitive pricing. Cons: Risk of unknown condition, "as-is" sales, potential for scams, high shipping costs.
2. Specialized Jeep Parts Dealers/Restoration Shops: Companies like Quadratec, Morris 4×4 Center, Omix-ADA, and specific restoration shops often stock new, used, or professionally rebuilt CJ5 transmissions. Pros: Reputable sources, often offer warranties on rebuilt units, expert advice. Cons: Higher prices.
3. Junkyards/Salvage Yards: For the adventurous and mechanically inclined, a local junkyard can yield a donor transmission. Pros: Lowest prices, possibility of finding rare original parts. Cons: Condition is highly variable, often requires significant cleaning and inspection, labor-intensive removal.
4. Jeep Forums and Enthusiast Groups: Online communities (e.g., CJ-3B Page, EarlyCJ5.com, JeepForum.com) and local clubs often have classified sections where members sell parts. Pros: Knowledgeable sellers, community support, potentially local pick-up. Cons: Limited selection, prices can vary widely.
5. Transmission Rebuilders: Many local or regional transmission shops specialize in rebuilding older units. If your existing transmission is a good candidate, rebuilding it might be an option. Pros: You retain your original transmission, often comes with a warranty, supports local business. Cons: Can be expensive if extensive damage, requires time for the rebuild.

What to Look For When Buying a CJ5 Transmission

Whether you’re buying a used or rebuilt unit, a thorough inspection is critical:

• Ask for Detailed Photos/Videos: Don’t rely on a single, blurry image. Request multiple angles, close-ups of mounting points, input/output shafts, and the bell housing.
• Check for Cracks or Damage: Inspect the casing for any signs of impact, cracks, or previous repairs.
• Inspect Shafts: Check the input and output shafts for straightness, spline damage, or excessive play.
• Look for Fluid Leaks: Stains or residue around seals and gaskets indicate potential leaks.
• Check Bolt Holes and Threads: Ensure all bolt holes are intact and threads aren’t stripped.
• Seller’s Reputation: If buying online, check reviews and ratings. If from a private seller, ask questions about the transmission’s history.
• Warranty: Rebuilt transmissions often come with a warranty (e.g., 6 months to 1 year). This provides peace of mind. Used transmissions rarely do.
• Spin Test (if possible): If the transmission is out of the vehicle, try to rotate the input shaft while holding the output. You should feel the gears engaging and disengaging relatively smoothly.

Installation Considerations: DIY vs. Professional

Installing a transmission is a significant mechanical task.

• DIY Installation: Possible for experienced DIYers with the right tools (transmission jack, sturdy jack stands, full set of wrenches/sockets). It saves on labor costs and offers a deeper understanding of your vehicle. Be prepared for a full day’s work, if not more, and potential unforeseen issues.
• Professional Installation: Recommended for those without the necessary tools, experience, or time. A professional shop can ensure correct installation, proper fluid levels, and may offer a warranty on their work. While more expensive upfront, it can save headaches down the line.

Associated Parts to Consider Replacing:
When installing a "new" transmission, it’s wise to replace several other components simultaneously:

• Clutch Kit: Pressure plate, clutch disc, throwout bearing, pilot bushing.
• Rear Main Seal: On the engine, if accessible, to prevent future leaks.
• Transfer Case Seals: Especially the input seal where it mates to the transmission.
• Transmission Mounts: Worn mounts can cause vibrations and premature wear.
• Shifter Bushings: For smoother shifting.
• New Fluid: Always use the correct type and amount.

Rebuilding vs. Replacing: Which Path is Right for You?

The choice between rebuilding your existing transmission and replacing it with a used or rebuilt unit depends on several factors:

• Rebuilding (Your Existing Unit):
  • Pros: Retains originality, potentially more cost-effective if damage is minor, you know the history of the unit, and it’s built to your specifications.
  • Cons: Time-consuming (waiting for parts/labor), requires specialized tools and knowledge, cost can escalate if significant internal damage is found, you might need a temporary vehicle.
• Replacing (Used/Rebuilt Unit):
  • Pros: Quicker turnaround, often comes with a warranty (rebuilt), less hassle if you’re not mechanically inclined.
  • Cons: Higher upfront cost for a rebuilt unit, risk of unknown issues with a used unit, may not be an exact original match.

For rare or specific transmissions, rebuilding might be the only viable option if a replacement isn’t available.

Common Challenges and Solutions

• Compatibility Nightmares: Always double-check part numbers, year ranges, and engine/transfer case pairings. Consult online forums, factory service manuals, or reputable Jeep parts specialists.
• Finding Rare Transmissions: Patience is key. Expand your search radius, utilize online communities, and consider "wanted" ads. Sometimes, a common swap (like an SM465) with an adapter might be easier than finding a rare original.
• Shipping Costs: Transmissions are heavy. Always factor in significant shipping costs if buying from afar. Get quotes before committing.
• Hidden Damage in Used Units: Mitigate this by buying from reputable sellers, asking for extensive photos/videos, and checking for a return policy. Consider getting a pre-purchase inspection if possible.

Jeep CJ5 Transmission For Sale: Estimated Price Guide

Prices for CJ5 transmissions vary wildly based on type, condition (used, rebuilt), rarity, and the seller. The table below provides a general estimate for common CJ5 manual transmissions in the current market. These are estimates and can fluctuate significantly.

Transmission Type	Typical Condition	Estimated Price Range (USD)	Notes
Borg-Warner T-90	Used (pull-out)	$300 – $600	Basic 3-speed, common in early CJ5s. Often needs rebuild.
	Rebuilt	$800 – $1,500	Professionally reconditioned with new bearings, seals, synchros.
Borg-Warner T-14	Used (pull-out)	$350 – $700	3-speed, slightly heavier duty than T-90.
	Rebuilt	$900 – $1,600	Good option for 6-cylinder early 70s CJs.
Borg-Warner T-15	Used (pull-out)	$400 – $800	Heavy-duty 3-speed, often with V8s. Desirable for its strength.
	Rebuilt	$1,000 – $1,800	Excellent choice for V8 CJ5s.
Borg-Warner T-18	Used (pull-out)	$500 – $1,200	Highly sought-after 4-speed with very low 1st gear. Price varies based on wide-ratio vs. close-ratio.
	Rebuilt	$1,500 – $2,500+	Premium for its off-road capability. Often includes adapter for various engines/transfer cases if sold by specialty shop.
Tremec T-176	Used (pull-out)	$400 – $900	Good all-around 4-speed.
	Rebuilt	$1,200 – $1,900	Balanced performance for street and trail.
Borg-Warner T-4/T-5	Used (pull-out)	$300 – $700	Lighter duty 4-speed (T-4) and 5-speed (T-5). T-5 offers overdrive. Often from later model CJs/YJs.
	Rebuilt	$900 – $1,700	Good for street use, less robust for heavy off-roading.
GM SM465 (Common Swap)	Used (pull-out)	$200 – $500	Heavy-duty 4-speed truck transmission, very popular swap. Requires adapter.
	Rebuilt	$700 – $1,300	Excellent durability, but requires additional cost for adapters.
Transfer Case Adapter	New	$200 – $600	Necessary if changing transmission type or mating to a different transfer case (e.g., Dana 18, Dana 20, Dana 300).
Clutch Kit	New	$150 – $400	Essential to replace when changing transmission.
Fluids & Seals	New	$50 – $150	Necessary for any installation.

Note: These prices are estimates only and do not include shipping, installation labor, or the cost of associated parts like bell housings or transfer case adapters, which can add significantly to the total project cost.

Frequently Asked Questions (FAQ) about Jeep CJ5 Transmissions

Q1: What transmissions came in the Jeep CJ5?
A1: Over its long production run (1955-1983), the CJ5 used several manual transmissions, including the Borg-Warner T-90, T-14, T-15, T-18, Tremec T-176, and later the Borg-Warner T-4 and T-5.

Q2: Can I swap a different transmission into my CJ5?
A2: Yes, many CJ5 owners swap to different transmissions (e.g., GM SM465, NV4500) for improved strength, more gears, or better highway manners. However, this typically requires adapter kits for the engine and transfer case, custom driveshafts, and potentially floor modifications.

Q3: How much does a Jeep CJ5 transmission cost?
A3: Prices vary greatly. A used, pull-out unit might range from $300-$1,200, while a professionally rebuilt unit can cost $800-$2,500 or more, depending on the transmission type and its condition. Don’t forget to factor in shipping and associated parts.

Q4: Is it better to rebuild or replace my CJ5 transmission?
A4: If your existing transmission has minor issues or you want to maintain originality, rebuilding can be a good option. If it’s severely damaged, a rare unit, or you prefer a quicker solution with a warranty, replacing it with a rebuilt unit might be better. Used units are generally a gamble.

Q5: What should I look for when buying a used CJ5 transmission?
A5: Inspect for cracks, damaged shafts, stripped threads, and signs of fluid leaks. Ask for detailed photos/videos. Verify compatibility with your engine and transfer case (bell housing, input/output shafts). Buy from a reputable seller if possible.

Q6: What other parts should I replace when installing a new transmission?
A6: It’s highly recommended to replace the entire clutch kit (clutch disc, pressure plate, throwout bearing, pilot bushing), transmission mounts, and transfer case input seal. Always use new, correct-type transmission fluid.

Conclusion: Gearing Up for More Adventures

Finding a "Jeep CJ5 Transmission For Sale" is more than just a transaction; it’s an investment in the continued legacy and capability of a classic vehicle. By understanding the different transmission types, knowing where to source them, diligently inspecting potential purchases, and planning for the installation, you can successfully revive your CJ5 and prepare it for countless more miles of open road and rugged trails. The journey of maintaining a vintage Jeep is a labor of love, and a healthy transmission ensures that love translates into unforgettable adventures for years to come.