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Home > Products > Transmissions > 6L80E / 8L90E - PG | TH350 | TH400 | 4L65E | 4L85E | TF727 | TF904 | 6L80E | 8L90E
6L80E & 8L90E Transmissions

In late 2005, General Motors introduced the 6L80E six speed automatic transmission. Featuring clutch to clutch shifting, it eliminated the one-way clutches used in earlier transmissions. Its eight-speed successor, the 8L90E was introduced in 2014. ATI is now developing components to upgrade your 6 and 8 speed transmission!

6L80E 6-Speed Transmssion

The 6L80E has a gear ratio spread of 4.03, 2.36, 1.53, 1.15, .85 and .67. At 500HP, the clutches in these units go out and at 700HP you WILL start hurting hard parts. ATI can build up your 6L80E transmission for up to 1000HP.
  8L90E 8-Speed Transmssion
The 8L90E is an eight speed with gear ratios of 4.56, 2.97, 2.08, 1.69, 1.27, 1.00, 0.85, 0.65 and REVERSE 3.82. A numerically high 4.56 first gear ratio offers strong take-off performance while a wide 7.0:1 overall ratio helps optimize cruising efficiency. Two versions are available: a slip-yoke design for use with the LT1 engine and a fixed-yoke design to be used with the LT4. ATI upgrades all 8L90E transmissions with increased clutches and a different clutch material make-up and also upgrades the clutch drums from LT1 units. These units are a great choice for everything from a '32 Ford Street Rod to a '69 Camaro Pro touring car to your drag car like those seen on Drag Week.


6L80E / 8L90E Transmission Components and Accessories



Transmission Filters

Application Part # Price
8L90E TRANSMISSION FILTER - OEM REPLACEMENT $24.95
6L80E / 6L90E TRANSMISSION FILTER $15.95
Master Overhaul Kits
Complete rebuild kit includes all paper, clutches, steels, seals and rings. The 8L90E kit includes filter and Raybestos’ upgraded friction components manufactured with GPZ high energy fibers for ultimate stress and high durability.

Application Part # Price
8L90E MASTER OVERHAUL KIT $495.85
6L80E MASTER OVERHAUL KIT $818.20
6L90E MASTER OVERHAUL KIT $818.20

6L80E 6L90E Upgrade Kit
Includes piston, piston kit, backing plate, pump slide spring, seal kit, valve kits and
boost and zip kit.

6L80E 6L90E UPGRADE KIT - INLCUDES ALL PART #S BELOW 710000 $929.00

1-2-3-4 HEAVY DUTY PISTON 710001 $82.45
4-5-6 HEAVY DUTY CLUTCH APPLY PISTON KIT 710002 $132.27
BACKING PLATE 710003 $62.83
PUMP SLIDE SPRING 710004 $7.02
ZIP KIT - COMPLETE 710011 $264.50

Zip Kit Components 710011 Part # Price
CENTER SUPPORT SEAL KIT 710005 $40.91
CLUTCH BOOST VALVE 710006 $30.24
BACKING PLATE 710007 $37.40
PUMP SLIDE SPRING 710008 $23.44
PRESSURE REGULATOR & BOOST VALVE 710009 $62.08
AFL VALVE 710010 $51.13

GPZ Friction Module Kit
Fits 10L80, 10L90, 10R80, 10R90

Applications Part # Price
GPZ FRICTION MODULE KIT 702100 $176.23
Bushings and Bushing Kits

Application Part # Price
6L80E / 6L90E 11 PCS BUSHING KIT - TEFLON COATED DURA BOND $97.38
6L80E EXTENSION BUSHING - TEFLON COATED DURA BOND $9.95
6L90E EXTENSION BUSHING - TEFLON COATED DURA BOND $9.95
6L80E / 6L90E PUMP BUSHING - TEFLON COATED DURA BOND $12.95
8L90E Bearing for Drum

Applications Part # Price
FOR 1-3-5-6-7 CLUTCH 703514 $11.95

8L90E HDXTREME™ Clutch & Friction Kits
Massive amounts of holding capacity for your 8L90E transmission! Increased clutch counts in all positions by as much as 40%! Billet steel, American Made, pressure plates, with updated high performance frictions and steels.

Coming soon - currently in vehicle testing phase

Applications Part # Price
HDXTREME™ CLUTCH & FRICTION KITS -- --
 
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