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#91029105
Chevy LS 4L80E Automatic Transmission, Up To 500 HP
- Dyno tested Street King 4L80E 4-speed rebuilt automatic transmission with overdrive
- Internal parts, including friction and steel plates, band, seals, thrust washers, and more all replaced
- Street King valve body modified with shift improvement features for firmer, later shifts and features all new electronics
$3,632.99
/each
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Product Summary
4L80E, Four Number of Gears, Automatic Valve Body Style
- Dyno tested Street King 4L80E 4-speed rebuilt automatic transmission with overdrive
- Internal parts, including friction and steel plates, band, seals, thrust washers, and more all replaced
- Street King valve body modified with shift improvement features for firmer, later shifts and features all new electronics
- Transmission requires factory PCM and wiring or aftermarket transmission controller to function properly
- Torque converter not included and sold separately if needed
Key Specs
| Valve Body Style | Automatic |
| Lockup Compatible | Yes |
| Yoke Style | Slip On |
| SFI Rating | Not SFI-approved |
| Flexplate Included | No |
Need To Know
Truck Shipment
Truck shipments must be pre-paid with a credit card, certified check or money order
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855.313.9176Quick and Easy Returns
Return PolicySpeedway Motors 91029105 Details
Speedway Motors 91029105 Details
- Dyno tested Street King 4L80E 4-speed automatic transmission with overdrive
- Street King transmissions suitable for street and mild strip use up to 500 hp
- Features Chevy V8 bellhousing pattern
- All new friction and steel plates, new intermediate band, and all new bushings
- Front pump rebuilt for higher transmission line pressure
- Valve body rebuilt with shift improvements and all new electronics
- New oil filter and factory steel transmission pan
- Dipstick tube, and torque converter sold separately
- Supports factory PCM or aftermarket 4L80E stand alone transmission controller
- Please note, residual transmission fluid may be present in the bag containing the transmission. This does NOT indicate a transmission leak. It is a result of the dyno testing of the transmission prior to packaging.
Our Street King Transmissions Save You Time and Money, Getting You on The Road Faster
The typical enthusiast tends to be a Jack of all trades sort. They have dabbled in engine work, handled their fair share of brake and suspension projects, and have probably tackled some interior and wiring fun as well. Where things tend to get dicey for many is aft of the flexplate, the transmission and rear axle. Going inside either of these major components for performance updates or even a simple rebuild from a zillion miles of service usually requires special service tools, a manual full of steps and specs, and a hospital-clean like work area. We know many that have tried to rebuild their own transmission or swap out a rear gear only to have to do it again (or third time’s the charm) to get it right if it is ever right again at all.
Sometimes it is best to simply have your transmission rebuilt instead of investing in all the tools and materials to do it yourself, especially if it is a “one and done” proposition and you’re not planning to rebuild transmissions as a side gig or hobby. The problem with this is often finding a solid and reliable shop that will do the work they say they are going to do and in the timeframe you expect. Today these are far and few between, much like a traditional engine machine shop. We know your time is valuable and when you need a new transmission for a project, or to replace your tired original, having the ability to simply order one of our Street King automatic transmissions, with no core return required, is often the best option.
A Street Friendly Overdrive Transmission That Supports Up To 500 HP
If you’re looking for a solid performing street transmission for your classic pickup, muscle car, or hot rod build with the added benefit of overdrive for those long hauls, our 4L80E Street King transmission is the perfect solution to your needs. Our Chevy 4L80E transmission is suitable for higher horsepower or heavier vehicles and features all new internal wear components such as clutch discs, bands, thrust washers, seals, and more. Every 4L80E valve body includes all new electronics along with other shift improvement updates.
Externally, each Chevy 4L80E transmission includes a stock steel oil pan. Our Street King 4L80E is compatible with stock GM PCMs and wiring for plug and play installation or can be controlled via a 4L80E stand alone transmission controller if you are using a carburetor or aftermarket EFI system. Every transmission goes through a 23-point inspection process on an Axiline transmission dyno before leaving the factory to confirm shifting ability, line pressures, and more so when it lands on your door step you know it’s ready to go.
Our Street King 700R4 transmission uses the standard 32-spline output shaft. Simply select the torque converter that best suits your needs, add a transmission dipstick assembly, and you’ll be in business. Of course, if you are building a project from the ground up, you may also need a flexplate, transmission cooler lines, transmission cooler, torque converter fasteners and other items as well to complete your installation.
Built To Last with No Core Return Required
Nobody wants to deal with trying to drain an old transmission of fluid, crating it up, and having some trucking line pick it up when it is convenient for them and not for you. With our Street King transmissions there is no core required. Nothing to send back, no need to sit and wait for any refund, just unbox your freshly built Street King 4L80E transmission and get back to your project. This is especially helpful if you’re building from nothing and do not have a core Chevy 4L80E transmission to even send back! Rest easy knowing our Street King transmissions are built by hand using the best parts and backed by the manufacturer’s one year warranty. To sum it up, our Street King transmissions are a great value for your project needs and will provide many miles of trouble free driving.
Features
Valve Body:
Completely rebuilt valve body with shift kit and all new electronics
Washers/Bushings:
New washer set
All bushings replaced
Heavy duty 34 element intermediate sprag
Clutches/Band:
New high performance clutches
New high performance intermediate band
Other features:
Recalibrated front pump with hardened vane rings
Factory steel oil pan
New Output Speed Sensors
32-spline output shaft
Seals are synthetic fluid compatible
Uses DEXRON 3 or DEXRON 6 (friction modifier needed if using DEXRON 6)
Warranty Information
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Warranty Information
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One year manufacturers defect only warranty. Warranty claims are from the date of shipment, not install. Warranty for defects excludes improper installation, cooling, or useage. Torque converter must be replaced, cooler lines flushed, TV cable adjusted (where applicable), MAF cleaned on electronic transmissions, and DTC codes cleared. Dexron VI (6) fluid must be used to maintain warranty.
Speedway Motors 91029105 Specifications
Speedway Motors 91029105 Specifications
| KEY SPECS | |
|---|---|
| MFG. Part # | 91029105 |
| Brand | Speedway Motors |
| Valve Body Style | Automatic |
| Lockup Compatible | Yes |
| Yoke Style | Slip On |
| SFI Rating | Not SFI-approved |
| Flexplate Included | No |
| GENERAL | |
| Number of Gears | Four |
| Transmission Advertised Horsepower Rating | 500 HP |
| Torque Converter Included | No |
| Trans-Brake Included | No |
| Transmission Case Material | Aluminum |
| Fluid Fill Location | Case |
| Transmission Pan Style | Stock |
| Transmission Pan Material | Steel |
| Transmission Pan Finish | Black Painted |
| First Gear Ratio | 2.48:1 |
| Flexplate Shield Built In | No |
| Dipstick Included | No |
| Electronic Transmission Controller Included | No |
| Transmission Fluid Included | No |
| Transmission Fluid Type | Dexron VI (6) |
| Transmission Cooler Included | No |
| Transmission Dust Cover Included | No |
| Sold in Quantity | Each |
Ratings & Reviews
Ratings & Reviews
Fitment
Fitment
1985-1986 Chevy Astro
Gen 1 LB1 90-Degree Chevy
1985-1986 Chevy C10
Gen 1 LB1 90-Degree Chevy
1985-1986 Chevy C20
Gen 1 LB1 90-Degree Chevy
1985-1986 Chevy Caprice
Gen 1 LB1 90-Degree Chevy
1985-1986 Chevy El Camino
Gen 1 LB1 90-Degree Chevy
1985-1986 Chevy G10
Gen 1 LB1 90-Degree Chevy
1985-1986 Chevy G20
Gen 1 LB1 90-Degree Chevy
1985-1986 Chevy G30
Gen 1 LB1 90-Degree Chevy
1985 Chevy Impala
Gen 1 LB1 90-Degree Chevy
1985-1986 Chevy K10
Gen 1 LB1 90-Degree Chevy
1985 Chevy K20
Gen 1 LB1 90-Degree Chevy
1985-1986 Chevy Monte Carlo
Gen 1 LB1 90-Degree Chevy
1985-1986 GMC C1500
Gen 1 LB1 90-Degree Chevy
1985-1986 GMC C2500
Gen 1 LB1 90-Degree Chevy
1985-1986 GMC K1500
Gen 1 LB1 90-Degree Chevy
1985 GMC K2500
Gen 1 LB1 90-Degree Chevy
1985-1986 GMC Safari
Gen 1 LB1 90-Degree Chevy

