Cadillac DTS Forum - 2006 through 2012 Discussion, What speed does your DTS shift into D/OD? in Past Cadillac Vehicle Discussion; Light load I can get it to upshift at about 39. Otherwise, steady throttle, it does it at 43 - ...
Re: What speed does your DTS shift into D/OD? Light load I can get it to upshift at about 39. Otherwise, steady throttle, it does it at 43 - 45. Re: What speed does your DTS shift into D/OD? Here are the later "DTS" transmission ratios - 3 is D, 4 is OD. TCC is not a gear - it is a viscous clutch that removes most of the 4th gear slip between the TC stator and rotor.
1 = 2.96
2 = 1.63
3 = 1.00
4 = 0.68 (OD)
You need to find your model/option final drive ratio - most were the economy/cruise 3.11:1. There are speed-rpm tables, TCC engaged above 43 mph, in my albums. Re: What speed does your DTS shift into D/OD? Transmission General Specifications (4T80-E)
RPO Codes MH1 Production Location Willow Run, Ypsilanti, MI Vehicle Platform, Engine/Transmission, Usage H, Ksp Transmission Drive Transverse Mounted Front Wheel Drive 1st Gear Ratio 2.960:1 2nd Gear Ratio 1.626:1 3rd Gear Ratio 1.000:1 4th Gear Ratio 0.681:1 Reverse 2.130:1 Torque Converter Size, Diameter of Torque Converter Turbine 265 mm Pressure Taps Line Pressure Transmission Fluid Type DEXRON® VI Transmission Fluid Capacity, Approximate Bottom Pan Removal: 7.0 L (7.4 qts)
Complete Overhaul: 12.0 L (12.6 qts)
Dry: 14.2 L (15.0 qts) Transmission Type: 4 Four Forward Gears Transmission Type: T Transverse Mount Transmission Type: 80 Product Series Transmission Type: E Electronic Controls Chain Ratios, Designates Number of Teeth on the Drive/Driven Sprockets 39/39 Final Drive Ratios 3.11, 3.71 Position Quadrant P, R, N, X, 3, 2, 1 Case Material Die Cast Aluminum Transmission Weight Dry 121 kg (266.75 lbs) Transmission Weight Wet 133 kg (293.21 lbs) Maximum Trailer Towing Capacity 1 361 kg (3,000 lbs) Maximum Gross Vehicle Weight (GVW) 3 084 kg (6,800 lbs)