Hey Guys, Girls,

I was on GMs newley updated site and found this info, thought I would share it with you... :thumb:


http://media.gm.com/us/powertrain/en/product_services/2008/Spec%20Sheet/Ecotec/08_LNF.xls


http://media.gm.com/us/powertrain/en/product_services/2008/08truck.htm

SWEET INFORMATION! Thanks :)

250 HP for the automatic!!! WOW!!! They originally said it would be 235HP... I'm all over the automatic when it comes out!

There's a strange note, on the automatic cell, that says "235hp in first and second gear."

Seems like there might be some sort of computer limited power peak in lower gears.

There's a strange note, on the automatic cell, that says "235hp in first and second gear."

Seems like there might be some sort of computer limited power peak in lower gears.

Where? I can't find it...

Torque dropped also, from:

260 lb-ft (353 Nm) @ 2000 rpm SAE CERTIFIED


The 5 speed to:


222 lb-ft (301 Nm) @ 1650 rpm SAE CERTIFIED

With the auto....

That's quite a bit of tq to lose.

Where? I can't find it...

you have to roll your cursor over that cell when you're in the Excel program. It doesn't show up until you roll over it.

So there must be some sort of engine management programming going on to reduce power in first and second... hmmm... so by the time I'm winding it out in 3rd, 4th and 5th gears, I get 250 HP. I dunno... I guess I'll have to test drive the darn thing to see if it's got enough ooomph for me.

Well at least there is some new news, yippee, I guess.

Torque dropped also, from:

260 lb-ft (353 Nm) @ 2000 rpm SAE CERTIFIED


The 5 speed to:


222 lb-ft (301 Nm) @ 1650 rpm SAE CERTIFIED

With the auto....

That's quite a bit of tq to lose.

What is the torque on the current 2.2L and 2.4L's?

What is the torque on the current 2.2L and 2.4L's?

The 2.4 is 165 lb.-ft. of torque at 4800 rpm.
The 2.2 is 152 lb.-ft. of torque at 4200 rpm.

The 2.4 is 165 lb.-ft. of torque at 4800 rpm.
The 2.2 is 152 lb.-ft. of torque at 4200 rpm.

In any case, it's still a 33 percent increase in torque over the 2.4L. I wonder if it will still have a sub 7-second 0-60 time...

If you poke around on that second link you can find some nice pics of the HHR SS engine and available transmissions...
Here's the 2.0L Turbo...
http://media.gm.com/us/powertrain/en/product_services/2008/Photo%20Library/Ecotec/LNF/08%202.0L%20I4%20LNF%20HHR%20LoR.jpg

and the 5-speed trans...
http://media.gm.com/us/powertrain/en/product_services/2008/Photo%20Library/Transmissions/2008%20%20%20Manuals/08%20F35%20MU3%20LoR.jpg

and the wimpy automatic that can't take the full brunt of 260HP...
http://media.gm.com/us/powertrain/en/product_services/2008/Photo%20Library/Transmissions/2008%20Automatics/08_4T45_MN5_LoR.jpg

No problem! Enjoy!

More Info:

2008 Hydra-Matic 4T45 (MN5, ME7)

2008 Model Year Summary
Hydra-Matic 4T45 four-speed electronically controlled automatic transmission.

● New Applications:
Saturn VUE (MN5/ME7) – All New Vehicle
Chevrolet HHR SS (MN5) – New Engine: ECOtec 2.0L I4 DI Turbo (LNF)

● Durability Enhancements

FULL DESCRIPTIONS OF NEW OR CHANGED FEATURES

DURABILITY ENHANCEMENTS
To improve high-mileage durability, many components have been strengthened. Included are the input sun gear, which is shot peened and the input carrier pinion washers which will receive a new coating.

LOW MAINTENANCE
The 4T45 transaxle uses DEXRON® VI fluid, and is "fill-for-life", with no maintenance scheduled for normal operation. DEXRON® VI, was developed to behave more consistently during temperature and other environmental variations, as well as to provide even lubrication of the moving surfaces of the transmission and more stable shift performance in extreme conditions. Durability is also increased with the new fluid.

OVERVIEW
The Hydra-Matic 4T45 is an electronically controlled four-speed transaxle that achieves industry benchmark levels of reliability and shift quality. Precisely calibrated electronic controls enable the transmission to adapt to a variety of driving conditions providing the driver with consistent shift quality. All 4T45 transaxles use the proprietary GM ECCC (Electronic Controlled Capacity Clutch) technology for torque converter lock-up functions. ECCC allows a very small degree of controlled slip in the torque converter lockup clutch to isolate drivetrain pulses and contribute to smooth delivery of power. The transaxle's low-noise operation is a result of the high helix angle gears, an enclosed bell housing, and the random-pattern chain. Mass has been reduced through optimized case design and use of lightweight materials. Driver Shift Control (DSC) function is available that allows easier manual shifting of the gear ranges. On some models the floor-mounted shift lever can be moved rearward and to the right to enable the DSC, and momentary movements of the lever forward and rearward can respectively upshift and downshift the transaxle. Electronic controls prevent downshifting at speeds which would cause the engine to over-rev, and automatically downshift when the vehicle comes to a stop. The 4T45 has a modified channel plate and valve body which allows the ability to electronically change shifts as signaled by the driver pushing a switch on the gear selector lever. To use the feature in the Malibu application, for example, the driver shifts the gear selector from D to the D3 position, then pushes the selector switch to downshift to D2 and then D1. Upshifting from D1 to D2 and D3 is accomplished through the selector switch as well.

On the 4T45 ( ME7 ), hybrid applications, there are several different operating conditions, including an engine-off condition while the vehicle is stopped at a stoplight, battery recharge on deceleration, and electric motor assist on acceleration. To accommodate the electric motor and the duty cycle of engine-off operation, the 4T45 has been modified to enable normal operation by utilizing an electrically powered hydraulic auxiliary pump to maintain pressure to the Forward clutches The Pressure Switch Manifold has also modified for additional diagnostic capability..

LOW MAINTENANCE
The 4T45 transaxle uses DEXRON® VI fluid, and is "fill-for-life", with no maintenance scheduled for normal operation.

Anyone else see this as a issue..... :lol:

The 4T45 is the same trans that has been used from the beginning in the HHR, both 2.2 and 2.4. Nothing new here other than what appears to be some durability improvements.

The 4T45 is the same trans that has been used from the beginning in the HHR, both 2.2 and 2.4. Nothing new here other than what appears to be some durability improvements.

Which is another reason I am glad I got the stick. When was the last time you heard of catastrophic failure with a standard?

With small autos? :eek:

Which is another reason I am glad I got the stick. When was the last time you heard of catastrophic failure with a standard?

With small autos? :eek:

I hear about clutches burning up all the time...

I hear about clutches burning up all the time...

A less than $500 clutch set is a lot differant than a $3000+ transmission replacement.

Also a clutch is a wear item like brakes. But it's easy to get well over 100K on a clutch. Last one I replaced was at 190K.

Which is another reason I am glad I got the stick. When was the last time you heard of catastrophic failure with a standard?

With small autos? :eek:
well my 1998 Z28 six-speed went south on me at 41K miles. Had to rebuild it... that was pretty catastrophic to my finances... :(

I never raced it all, just driving it the way most anyone would...
One morning I tried to drive to work and it wouldn't go into 2nd gear. :cussing:

Which is another reason I am glad I got the stick. When was the last time you heard of catastrophic failure with a standard?

With small autos? :eek:
Same for the manual tranny.

2008 Model Year Summary
Getrag F23 five-speed manual car and truck transaxle

• Carryover from 2007 Model Year

LOW MAINTENANCE

"The F23 uses DEXRON III for 2007, and are filled-for-life, requiring no fluid changes for normal duty service. "

Same for the manual tranny.

2008 Model Year Summary
Getrag F23 five-speed manual car and truck transaxle

• Carryover from 2007 Model Year

LOW MAINTENANCE

"The F23 uses DEXRON III for 2007, and are filled-for-life, requiring no fluid changes for normal duty service. "

The manual at least has a resivour (sp) for the clutch. But in general, all manual tranny's are "filled for life". Always have been. Shavings inside an auto are bad, period. All it takes is one checkvalve to get stuck.

Yep. Even though my auto is filled for life, I'm going to have the filter changed and refilled with new fluid at some point down the road.