Post on 20-May-2018
2007 TCRA Seminar
• M/Y 2007 Overview of GM Torque Converter Changes• GM’s New 6 Speed FWD 6T70/75E Converter – 246mm• GMSPO – TCC Retail Update
GM Torque Converters - M/Y 2007 Summary
245mm 4T45E, 4T65E, 4L65E, 5L40/50E• No significant design changes • 245mm replaced by 258mm in Inline 4 engine (midsize truck – Colorado/Canyon)
258mm 4T65E, 4L60E, 5L40E, 5L50E• L-5 continues with 258mm
265mm 4T80E• All Viscous units replaced with ECCC
280, 300mm 4L65E• 280mm to end production in 2007, replaced with 258mm in L-6 applications
310mm 4L85E • Continues, to be replaced 6L90E / 300mm
Note: Dex VI added to all products in May 2005- 4 speed products can use Dex III, VI or a mixture- 6 speed products only use Dex VI
GM’s new FWD 6 SpeedGM 6T70/6T75 and Ford 6F50/6F55
Features:• All Wheel Drive available• Driver Shift Control• Internal Transmission Electro-Hydraulic Control Module (TEHCM)-GM only• Internal Mode Switch (IMS)• Performance algorithm – shifting• Automatic grade braking• Electronic range selection compatible• TCC availability 1st – 6th gears• Skip shifting• Reverse lock-out• Transmission abuse protection• Neutral idle compatible• Dual Gear limp home strategy – GM only• Flat Tow Capability• 6.04 overall ratio, 5th gear is direct drive, 6th gear is overdrive• GM design and co-developed / tooled with Ford Motor Co.
Approximately 90% of transmission elements are shared part numbers between GM and Ford
GM’s new FWD 6 SpeedGM 6T70/6T75 and Ford 6F50/6F55
Better Fuel Economy
Better
Fast
er
2-4% Improved EPAFuel Economy
7% Improved 0-60Performance
Typical 4 vs. 6-speed AT Axle Hook Analysis Comparison
6-Speed AT4-Speed AT
6T70E - Fuel Economy and Performance
246mm
• Currently only one K-factor 172K for GM & Ford
• Three and four lug versions for Ford and GM
• Pilots are different between GM and Ford
GM’s FWD / AWD 6T70/75E
Torque Converter Performance Data
0.00
0.50
1.00
1.50
2.00
2.50
3.00
3.50
4.00
0.00 0.10 0.20 0.30 0.40 0.50 0.60 0.70 0.80 0.90 1.00
Speed Ratio
TR /
Kin
/100
0%
10%
20%
30%
40%
50%
60%
70%
80%
90%
100%
Effi
cien
cy
GM 6T70E 246mm 172K
GM 4t60E 245mm 163K
260mm 150K U660E ToyotaCamery
Efficiency
Torque Ratio
Input K-Factor
6T70/75E – 246mm Torque Converter
Pressure distribution around stator blade(Section at R70, 0MPa is in blue)
Zero pressure area
(0MPa high-lighted in blue)
General Motors Service & Parts Operations EC3 Opportunity
• Overview– General Motors Service & Parts Operations (GMSPO) has decided to
introduce its patented EC3 torque converter material with applied plates to the aftermarket
• Program– Focused for sale to torque converter remanufacturers– Approx 8 p/ns to cover 300mm, 245mm, 258mm and 265mm GM
applications– Packaged in unit quantities, then to follow with bulk packs if required in
the market
General Motors Service & Parts Operations EC3 Opportunity
• TCC assemblies and Bonded Pressure Plates Available• Distribution
– Available through GMSPO direct accounts:• AC Delco Transmission warehouse distributors
– Transtar, Axiom, NatPro and Seatac• 95 AC Delco Dedicated Distribution Group (DDG) warehouse distributors• Over 7000 GM Dealers
– For further distribution inquires contact your AC Delco distributor, GM Dealer or:
• Keith Loch, GMSPO 810-606-2576