Get A W5A580 Transmission + Install Quote
Ship Direct To Repair Shop
We provide an out-the-door price, with shipping, for a replacement remanufactured W5A580 / NAG1 transmission direct to the repair shop.
W5A580 Transmissions At Wholesale Prices
At Street Smart, we provide remanufactured transmissions shipped factory direct at wholesale prices to save you money.
Ships with Synthetic Fluid
Ships with Pennzoil ATF Synthetic Transmission Fluid
Buy Factory Direct and Save!
Save an average of $350 – $1200 than buying through a dealer or repair shop!
Learn more about Shipping, Warranty, Core Returns, and Ordering from Street Smart
How Street Smart Transmission Works
1. Request An Estimate
Select your vehicle above to receive estimate. We will display an out-the-door price for a replacement remanufactured transmission, along with local installation estimate, shipped free to one of our recommended installers or your mechanic.
2. Order Factory Direct & Save
Buy factory direct wholesale and save an average $350 to $1200 vs. buying through shops or dealers. Special Financing available through PayPal Credit. All transmissions come with a 3 year, unlimited mile, parts and labor, nationwide warranty.
3. Free Ship + No Core Charge
*Residential delivery add $200. We do not ship to AK, HI, PR or International.
**Excluding Dodge Diesel 48RE, 65RFE & 68RFE models.
4. Free Core Pickup
Your mechanic installs your new transmission, and places your old transmission (core) into our reusable shipping container. You let us know when your vehicle is done, and we’ll send a truck to pick up the core free, within 24 hours.
Our W5A580 Updates and Upgrades
► Remanufactured pump, with new line bore bushings to eliminate leaks and provide superior flow and durability.
► Remanufactured valve body, with complete system correction and recalibration kit, improves pressure control and shift quality.
► Remanufactured and improved torque converter tested for leaks, concentricity, and balance. Upgrades exceed OE requirements and eliminate the possibilities of front seal leaks, premature bushing wear, and vibration.
► All new, bushings installed in key locations to improve internal fluid flow control and fluid pressures.
► Complete system correction and recalibration kit installed to address several OE flaws. Modifications include updates to servos, the PR system, and valve body accumulators.
► Heavy-duty recalibration kit installed to reduce slippage and increase durability.
► Complete road simulation using a dynamometer testing program called C.A.R.S. (Computer Aided Road Simulation). Every transmission is cold and hot tested before shipment.
W5A580 Vehicle Applications
How Many Variations of the W5A580?
There are many different variations (so we have over 60 different part numbers!). Each one for a different engine size (bellhousing) and varying electronic and solenoid systems for different years.
Only certain models will interchange with others, which is why we ask for your 17-digit VIN# when you order so we are 100% sure it is the matching unit for your vehicle!
Remanufactured W5A580 vs. Rebuilt or Used
3 Year, Unlimited Miles Nationwide Warranty
Parts & Labor Coverage
Our commitment to delivering excellent service doesn’t end at the closing of the sale! Should you have any questions or concerns about your Street Smart transmission, our Product Support Team is only a phone call away.
So what does a No Hassle Warranty really mean?
• You’re covered for 3 years, unlimited miles.
• Your warranty attaches to your vehicle and transfers to new owners.
• You’re covered anywhere in the continental United States.
• You’re back on the road fast; we send you a replacement transmission. as soon as your warranty diagnosis submitted!
• We pay labor to the shop installing your replacement transmission.
Labor Warranty Defined: Up to $50/hour MItchell book hours for removal and re-installation. Must be initially installed at an auto repair shop for labor warranty to be valid. Auto repair shop is defined as repair shop whose primary business is automotive repair and provides auto repair service to the general public, and the initial install is done on a repair order.
Commercial Application Defined: Vehicles of larger than one ton (F450/F550, 4500/5500 series, motorhomes), transportation for hire (taxis, shuttles, bus, limo) delivery service, business-owned commercial-use vehicles, police/emergency vehicles, tow trucks.
A Day in the Life of a Transmission Video
Learn more about Shipping, Warranty, Core Returns, and Ordering Works
Our Recent Reviews
We let our reviews speak for us.
W5A580 Diagnostic Trouble Codes
|P0700||Transmission Control System (MIL Request)|
|P0711||Transmission Fluid Temperature Sensor Circuit Range/Performance|
|P0712||Transmission Fluid Temperature Sensor Circuit Low Input|
|P0713||Transmission Fluid Temperature Sensor Circuit High Input|
|P0720||Output Speed Sensor Circuit|
|P0730||Incorrect Gear Ratio|
|P0731||Gear 1 Incorrect Ratio|
|P0732||Gear 2 Incorrect Ratio|
|P0733||Gear 3 Incorrect Ratio|
|P0734||Gear 4 Incorrect Ratio|
|P0735||Gear 5 Incorrect Ratio|
|P0740||Torque Converter Clutch Circuit Malfunction|
|P0743||Torque Converter Clutch Circuit Electrical|
|P0748||Pressure Control Solenoid 'A' Electrical|
|P0751||Shift Solenoid 'A' Performance or Stuck Off|
|P0765||Shift Solenoid 'D'|
|P0880||TCM Power Input Signal|
|P0881||TCM Power Input Signal Range/Performance|
|P0882||TCM Power Input Signal Low|
|P0884||TCM Power Input Signal Intermittent|
The NAG1 (WA580 or W5A580) automatic is an electronically controlled 5 speed transmission with a lock up clutch in the torque converter. Fifth gear is designed to be an overdrive with a high speed ratio. Ratios for gears are obtained by three planetary gear sets.
The term NAG1 is used to identify an entire family of transmissions including the W5A580 / WA580 model.