Destroyer 6L80E/6L90E
6L90 9404 0955 Offset Rear 9581 0945 With exhaust ports are 2010-earlier, use 24245720 separator plate. ISS and OSS bosses short on the 6L80 and 6L90. No exhaust ports are 2010–later. ISS and OSS bosses tall on the 6L45 and 6L50. Figure 3 6L80: Four holes offset to left. 6L90: Four holes offset to right. 6L45, 6L50: Four holes are centered in. The 6L90 transmission is not a terrible transmission. In fact, it is a high-performance component capable of handling up to 700 horsepower. Along with the 6L80 model, this transmission powers the best cars and trucks that GM offers. The 6L90E is not terrible.
6l90 Gear Ratio
6L80E/6L90E rated up to 1000 HP
6L80/6L90 (MYC, MYD) 1-2-3-4 Slip Condition, Possible No movement Forward CONCERN: 6L80/6L90 (RPO MYC, MYD) applications built before June of 2010 may exhibit a slip condition related to the operation of the 1 -2-3-4 clutch. This condition may be present in more than one forward gear or if. 6L90 (Parts Not Pictured, kits, manuals, etc) Click on a section to see a detailed view. Click on a part number to view part variations, pricing, and availability. Use the link above to browse parts not shown in the diagram. 6L80 / 6L90 transmissions do not typically use a dipstick. Proper fluid level is achieved when fluid begins to drip from the Level Control Plug opening. Verify vehicle is on level ground when performing fluid level check procedure. Verify drive wheels are blocked and parking brake is applied. Verify engine is idling at 0% throttle.
Maddog!!Super heavy duty 6L80E-6L90E 2WD or 4X4 transmission with billet converter!! This is the complete solution for your 6L80E / 6L90E Transmission. We start off with a Special made module kit that includes a Alto Red Eagle clutches and custom spec’d steels. These steels are made from 4140 HTSR steel and Kolene coated for increased rigidity. These improved steels allow more aggressive pressure ramps and will eliminated “coning”. We also add our 3-5-R Alto Red Eagle Power Pack.Powerglide Billet clutch hub and shaft. This is the final solution for your 4-5-6 clutch needs. We use a custom machined billet hub and shaft that is cut to accept a custom Power Glide 6l80 / 6L90 power pack. This Power pack will come with 8 full thickness Alto RED Eagle power glide clutches , 7 HTSR steels, special thick .160″ base plate and a custom machined 4-5-6 piston. also includes TIG welded and Cryogenically treated #1TWS shafts and hubs (Includes both). We also include a 6L80 6L90 full Billet converter with an upgraded Billet steel stator (4 custom stators to choose from). The custom stators allow us to change fluid velocity tremendously giving our 6L80 torque converters unmatched efficiency. This converter also comes with an oversized billet apply piston and oversized apply clutch. This Billet 6L80 / 6L90 Converter will be custom built to your stall speed.Teflon coated pump bushing and Jumbo filter in your build. New Billet steel pump rotor . The stock pump rotor has been known to explode with very fast acceleration due to suddencentrifugal force shock. Finally 300 PSI line pressure has been achieved with the addition of the Sonnax #6L80-LB1 line pressure booster kit. Custom tuning must be performed to the TCM to accommodate the new parts. Core charge is $750.00 includes new updated pump. We build all different Horsepower levels call for more details.
Call us at Maddodog transmissions 770-781-0949 7 days a week from 8 am to 10 pm EST.
The Hydra-Matic 6L90E transmission was introduced by GM to handle the increasing power of 3/4 ton and 1 ton Chevy and GMC Trucks. The 6L90 automatic six speed transmission is the heavy duty version of the 6L80E transmission. The 6L90E transmission has stronger input gear sets with six pinion gears and also a strengthened output gear set that has wider gears than the 6L80 transmission.
Here at Smart Parts we have given this precision workhorse a performance overhaul. Our long list of upgrades make the 6L90E transmission heavy duty enough to handle the toughest of hauling and off road conditions encountered by the Yukon or Sierra. At the same time the 6L90 has the fine tuning and tight tolerances needed to handle the extreme RPM's and power created by the ZL1 Camaro.
A quick overview
Chevy/GMC Vehicle Compatibility
- Camaro ZL1
- Express Van 2500
- Express Van 3500
- Sierra 2500
- Sierra 3500
- Sierra Denali
- Suburban 1500
- Suburban 2500HD
- Yukon
- Tahoe
6l90 Upgrades
Years Covered- 2006
- 2007
- 2008
- 2009
- 2010
- 2011
- 2012
- 2013
Performance Upgrades6l90 Transmission For Sale
- Valve Body
- Clutches
- Seal & Gasket
- Bearing
- Shift Improver Kit
- Bands
- Clutch Disks
- Dyno-Tested
6l90 Torque Converter
- Performance Grade remanufactured QS9000 Certified