Supporting Vendors / Dealers - Advertising - Shop

2006 - 2008 Corvette: GM TechLink: 6L80 or 6L90 Automatic Transmission Shift Conditions

Source:   GM Techlink

Date:   October 2011

Subject:   6L80 or 6L90 Automatic Transmission Shift Conditions

Models:   2006 - 2008 Chevrolet Corvette

Several shift conditions may be present on some 2006-2008 STS-V, XLR-V, Corvette; 2007-2008 Escalade, Escalade ESV, Escalade EXT, XLR, Silverado, Sierra, Sierra Denali, Yukon Denali, Yukon XL Denali; 2008 Suburban, Yukon XL, H2 and G8 models equipped with the 6L80 or 6L90 automatic transmission (RPOs MYC, MYD).
 
A cracked 1-2-3-4/3-5-R clutch housing may cause any of the following conditions:
  • Slip when Reverse is selected or no Reverse
  • Delayed engagement into Reverse
  • DTC P0776 set as an active or a history code in the Transmission Control Module, Malfunction Indicator Lamp (MIL) illuminated
  • Harsh shifts from Second to Third
Inspect the 1-2-3-4 / 3-5-R clutch housing for a possible cracked weld by applying soap compound to the weld area of the housing. Hold your thumb over the air bleed passage and spray compressed air into the piston housing. Inspect the weld area for bubbles. If bubbles are detected, a new housing is required. (Fig. 14)

6L80 or 6L90 Automatic Transmission Shift Conditions

Fig. 14
 
TIP: If a new 1-2-3-4 / 3-5-R clutch housing is needed, be sure to install the 1-2-3-4/3-5-R bearing. (Fig. 15) If this bearing is not installed, harsh shifts will occur.

6L80 or 6L90 Automatic Transmission Shift Conditions

Fig. 15
 
- Thanks to Mike Johnston
0 (0)
Article Rating (No Votes)
Rate this article
Attached Files
There are no attachments for this article.
Comments
There are no comments for this article. Be the first to post a comment.
Name
Email
Security Code Security Code
Related Articles RSS Feed
2004 - 2007 Corvette: Service Bulletin: Engine and Automatic Transmission/Transaxle Identification
Viewed 19 times since Mon, Jul 14, 2014
2000 - 2006 Corvette: Service Bulletin: Diagnostic Information on Diagnostic Trouble Code (DTC) P0894 and P1870
Viewed 19 times since Tue, Jul 15, 2014
2005 - 2008 Corvette: Service Bulletin: Rear Axle Clunk and/or Chatter Type Noise on Turns
Viewed 602 times since Sun, Jul 6, 2014
2006 - 2012 Corvette: Service Bulletin: #PI0773: Diagnostic Tips for DTC P0796, Slip or No 4th, 5th or 6th Gear - (Jul 25, 2012)
Viewed 118 times since Sun, Mar 19, 2017
2000 - 2006 Corvette: Service Bulletin: Diagnostic Information on Diagnostic Trouble Code (DTC) P0894 and P1870
Viewed 14 times since Mon, Jul 14, 2014
2005 - 2006 Corvette: Service Bulletin: Release of DEXRON VI Automatic Transmission Fluid (ATF)
Viewed 101 times since Fri, Jul 18, 2014
2006 - 2014 Corvette: Service Bulletin: #PIP5429: 2-3 Upshift Slip or Flare - (Oct 10, 2016)
Viewed 119 times since Thu, Oct 13, 2016
2005 - 2006 Corvette: Service Bulletin: Manual Transmission Operating Characteristics
Viewed 27 times since Sun, Jul 13, 2014
2006 Corvette: Service Bulletin: 6L80 Automatic Transmission Delayed Engagement From PARK to DRIVE or PARK to REVERSE (Reprogram Transmission Control Module (TCM))
Viewed 194 times since Tue, Jul 15, 2014
2006 Corvette: Service Bulletin: 4L60-E, 4L65-E Automatic Transmission fluid Leak from Oil Pump or Bell Housing Area
Viewed 15 times since Tue, Jul 15, 2014