General Motors 6L90-E Automatic Transmission

GM 6L90 6 Speed Automatic Transmission Specs & Information

The 6L90-E is a heavy duty version of GM's 6L80 designed for fullsize vehicles with a gross vehicle weight rating of up to 15,000 lbs and a gross combined weight rating of up to 21,000 lbs. The 6 speed automatic transmission features a modular transmission case design that accepts various bellhousings and output shaft adapters so that the transmission can be utilized in many applications without requiring extensive modifications or necessitate the need for complete application specific transmission designs. The 6L90 is found in Chevrolet Silverado HD and GMC Sierra HD pickups beginning with the 2007 model year. It is also used in the 2010 to current Chevrolet Express/GMC Savana 2500/3500 van series.

GM 6L90 Transmission Ratios

1st

2nd

3rd

4th

5th

6th

R

4.027 : 1

2.364 : 1

1.532 : 1

1.152 : 1

0.852 : 1

0.667 : 1

3.064 : 1

 

GM 6L90 Automatic Transmission Specs

Transmission:

General Motors 6L90-E

GM RPO Code:

MYD

Type:

6 speed automatic, rear wheel drive applications

Production Plant(s):

GMPT Toledo, Ohio and GMPT Silao, Mexico

Model Years/Applications:

2007 - current Chevrolet Silverado 2500HD/3500HD
2007 - current GMC Sierra 2500HD/3500HD
2010 - current Chevrolet Express 2500/3500
2010 - current GMC Savana 2500/3500

Case Material:

Die cast aluminum

Max Input Torque:

531 lb-ft

Stall Ratio:

1.9

PTO Provisions:

None

Output Shaft:

29 spline

Max GVWR:

15,000 lbs

Max GCWR:

21,000 lbs

Max Shift Speed:

6,200 RPM

Weight:

~ 245 lbs w/ torque converter and ATF

ATF Type/Spec:

DEXRON VI automatic transmission fluid

Fluid Capacity:

~ 13 quarts

Transmission Filter P/N:

ACDelco 24236933

Service Intervals:

Change transmission fluid and filter at 100,000 miles under normal service conditions, 50,000 miles under "severe" service conditions

Features:

• 300 mm torque converter

• Electronically controlled

• Integrated tow/haul setting provides alternative shift schedule for high load conditions in addition to decent speed control features

• Heavy duty version of the 6L80; 1 additional plate in each clutch pack, stronger input/output gearsets

• Modular transmission design for easy integration between various engine applications

 

Source(s): www.gmpowertrain.com & GM upfitter guide for applicable Silverado/Sierra 2500HD