JEEP AW4 TRANSMISSION FOR SALE

$609.00

Product Overview & Specifications

In Stock, Jeep AW4 4-Speed Electronic Automatic Available
Free Shipping to All 50 States via Freight Pallet, 5 to 10 Business Days
Donor Vehicle Confirmed (Cherokee XJ 1987-2001, Comanche MJ 1988-1992, or Wagoneer)
Engine Pairing Confirmed (4.0L AMC Inline-6 or 2.5L AMC Inline-4)
All 4 Forward Gears Tested
Overdrive (4th Gear) Lockup Function Tested
Reverse Gear Tested
Torque Converter Operation Verified
Electronic Shift Solenoids Tested
Valve Body Function Assessed
Line Pressure Verified
ATF Condition Documented

100% Fitment Assistance

15 Days Replacement Warranty

Free & Fast Shipping

Category: Transmission

Description
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Reliable Performance: Jeep AW4 Transmission for Sale

Got a Jeep Cherokee XJ standing by? Or looking to upgrade one? Take a look at this Jeep AW4 transmission for sale Another one of the great products engineered as a result of the Jeep / Aisin-Warner partnership, the AW4 transmission is designed to perform across on-road comforts and off-road adventures. The transmission is extremely reliable with great performance and even better durability , this is the reason why the AW4 transmission for sale here is a favorite among Cherokee XJ enthusiasts.

So if it’s an old transmission you want to replace or you’re looking to make your Jeep even better, this used AW4 transmission for sale here, with its smooth delivery, will get the job done.

What is the AW4 Transmission?

The AW4 transmission first came into the world in 1987 with the Jeep Cherokee XJ, the vehicle it was largely designed for. This 4-speed electronic automatic transmission received praise for its smooth delivery and adaptability across various driving conditions. The Jeep AW4 transmission for sale here is a great buy for those who use their Cherokees for towing, since the transmission can handle increased torque loads and the electronic system helps adjust shift patterns based on driving terrain. The AW4 is compatible with both the 2.5L AMC inline-4 (early years and low-trim applications) and the legendary 4.0L AMC inline-6 (the dominant XJ engine combination).

Aisin-Warner AW4: The Toyota Connection

The Aisin-Warner AW4 isn’t just a Jeep transmission , it’s part of the broader Aisin A340 family used extensively by Toyota in some of the most reliable Japanese vehicles ever made:

This shared Aisin family heritage is one reason for the AW4’s legendary reliability , Aisin’s design and manufacturing standards transferred directly to the Jeep application.

Why “The AW4 Lasts Forever“

The Jeep AW4 has earned a reputation in Cherokee XJ circles for exceptional durability. Common reasons for the AW4’s longevity:

Conservative shift programming: The TCM is programmed for smooth, gentle shifts that minimize wear

Strong internal components: Aisin engineering with quality clutch packs, planetary gears, and bearings

Adequate torque capacity: ~300-350 lb-ft handles the 4.0L AMC inline-6 (235 lb-ft) with significant margin

Robust valve body: Hydraulic control system holds up to high mileage

Excellent torque converter: The AW4 torque converter is well-matched to the 4.0L’s torque curve

Service-friendly design: Easy to drop the pan, change filter and fluid

Many Cherokee XJ owners report AW4 transmissions exceeding 300,000 miles with regular fluid and filter changes. Some report 400,000+ miles on original AW4s. This is exceptional for any automatic transmission, particularly a 1980s-design unit.

Vehicle Applications

The Jeep AW4 transmission was used in:

Key Engineering Features of the AW4

4-Speed Automatic with Overdrive: Gears 1st (2.804:1), 2nd (1.531:1), 3rd (1.00:1 direct), 4th (0.753:1 overdrive), Reverse (2.393:1)

Electronic Control: TCM (Transmission Control Module) electronically manages shift points , one of the first electronic automatic transmissions in mass-market production

Torque Converter Lockup: Reduces slippage and heat at highway speeds, improves fuel economy in 4th gear

Cast Aluminum Case: Lighter than cast iron, adequate strength for application

Electronic Shift Solenoids: Precise, repeatable shifting controlled electronically

External Cooling: Factory transmission cooler, auxiliary cooler recommended for heavy towing

Modular Valve Body: Service-friendly design for valve body service or replacement

Common AW4 Service Items (Honest Disclosure)

Honest disclosure of known service items:

Torque Converter Clutch (Lockup) Failure: Most common high-mileage failure (150,000+ miles). Symptoms: shudder during lockup engagement, slipping in 4th gear under light load.

Valve Body Wear: Common at 200,000+ miles. Symptoms: harsh shifts, delayed engagement, slipping.

Shift Solenoid Failure: Electronic solenoids can fail over time. Symptoms: stuck in gear, harsh shifts, no shift.

Speed Sensor Failure: Both input and output speed sensors can fail at high mileage, affecting shift quality.

TCM (Transmission Control Module) Failure: Less common but possible at very high mileage.

Pan Gasket Leaks: Pan gasket should be replaced during fluid services.

Output Shaft Seal: Can develop slow leaks at high mileage.

The AW4 is generally durable when maintained per Jeep specifications. Service interval: fluid and filter every 30,000-50,000 miles. Many AW4s benefit from full fluid flushes at higher mileages to extend life.

Why Choose a Used Jeep AW4 Transmission?

Cost savings vs reman ($609 used vs $1,400-$2,500 reman plus core)

Direct OEM fit for Cherokee XJ 1987-2001, Comanche MJ 1988-1992

Legendary reliability , one of the most respected automatics in Jeep history

Strong torque capacity , adequate for 4.0L inline-6 with significant margin

Aisin quality , shared family with Toyota A340 transmissions

Service-friendly , easy fluid and filter access

Here, you’ll find this Jeep AW4 transmission for sale at the most reasonable price possible, with all 4 forward gears tested including overdrive lockup, torque converter operation verified, electronic shift solenoids tested, and donor vehicle documented.

transmission-type	4-speed electronic automatic with overdrive
designation	AW4
manufacturer	Aisin Seiki Co., Japan), Ltd. (Aisin-Warner / Aisin Group
speeds	4 forward + reverse
control	Electronic (TCM-controlled)
gear-ratios	1st 2.804:1, 2nd 1.531:1, 3rd: 1.00:1, 4th 0.753:1 (overdrive), Reverse 2.393:1
construction	Cast aluminum case
torque-capacity	~300-350 lb-ft
fluid-type	Dexron II / III ATF
cooling	External transmission cooler (factory)
production-years	1987-2001 (in Jeep applications)
predecessor	Chrysler 904 / 999 TorqueFlite 3-speed automatic
aisin-family	A340 family (same as Toyota A340 / A341 / A343)
direct-fit	Jeep Cherokee XJ (1987-2001), Jeep Comanche MJ (1988-1992), Jeep Wagoneer
common-engine-pairing	Jeep 4.0L AMC inline-6 or 2.5L AMC inline-4
drive-configuration	RWD primary with transfer case for 4WD
price	$609.00

FAQs

What is the Jeep AW4 transmission?

The Aisin-Warner AW4 is a 4-speed electronic automatic transmission with overdrive, produced by Aisin Seiki of Japan and used by Jeep from 1987 to 2001. It’s part of the broader Aisin A340 family, the same family used by Toyota in vehicles like the Supra MK3, 4Runner, Cressida, and early Lexus LS400. Key features: cast aluminum case, 4 forward gears (1st, 2nd, 3rd, Overdrive 4th), electronic TCM control, torque converter lockup, and approximately 300-350 lb-ft torque capacity.

What vehicles use the AW4 transmission?

The AW4 was used in: – Jeep Cherokee XJ (1987-2001) , the most common AW4 application – Jeep Comanche MJ (1988-1992) , the XJ-based pickup truck – Jeep Wagoneer (1987-1990) , limited applications in the older full-size Wagoneer Most AW4s on the used market come from Cherokee XJs paired with the 4.0L AMC inline-6.

Why does the AW4 have such a strong reputation?

Several reasons combine for legendary reliability: – Conservative shift programming: TCM is programmed for smooth, gentle shifts that minimize wear – Strong internal components: Aisin engineering with quality clutch packs and planetary gears – Adequate torque capacity with margin: 300-350 lb-ft capacity handles the 4.0L AMC inline-6 (235 lb-ft) with significant safety margin – Excellent torque converter: Well-matched to the 4.0L’s torque curve – Service-friendly: Easy fluid and filter service encourages regular maintenance – Toyota family heritage: Same Aisin family used in some of Toyota’s most reliable vehicles Many Cherokee XJ owners report AW4 transmissions exceeding 300,000 miles with regular service. Some report 400,000+ miles.

How often should I change the AW4 fluid?

– Normal use: Every 30,000-50,000 miles (fluid and filter) – Heavy towing or off-road use: Every 20,000-30,000 miles – Severe service: Every 15,000-25,000 miles – At purchase of used AW4: Always do a full fluid and filter service before installation Regular fluid changes are the single biggest factor in AW4 longevity. Neglected AW4s often develop torque converter or valve body issues; well-maintained AW4s commonly exceed 300,000 miles.

What fluid does the AW4 use?

Dexron II or Dexron III automatic transmission fluid (ATF). Most modern Dexron III/Mercon fluids are compatible. Some owners use Dexron VI in higher-mileage AW4s as an upgraded modern fluid. Always check your Jeep service manual for exact specifications.

Can the AW4 handle a modified or stroker 4.0L?

Generally yes, within reason. The AW4 has approximately 300-350 lb-ft torque capacity, while the stock 4.0L produces 235 lb-ft. This gives significant margin for: – Mild modifications (intake, exhaust, header): No issues – Stage 1 / 2 bolt-ons: Generally OK – Stroker 4.7L / 4.6L builds (290-310 lb-ft): Within capacity but stresses the transmission – Forced induction (turbo/supercharged 4.0L): Approaches or exceeds capacity, may shorten transmission life For heavily modified 4.0Ls, a rebuilt AW4 with upgraded components is recommended.

What are the most common AW4 problems?

– Torque converter clutch (lockup) shudder: Most common high-mileage issue (150,000+ miles). Service includes new torque converter and possibly fluid flush. – Harsh or delayed shifts: Usually valve body wear or shift solenoid failure – No shift / stuck in gear: Shift solenoid failure or TCM issue – Slipping: Worn clutch packs (rebuild needed) Most AW4 issues are addressable through targeted repair rather than full replacement. Many AW4s also benefit from a transmission cooler upgrade for additional service life.