5-speed from Cobalt XFE in HHR?
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Joined: 01-03-2011
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From: MN
5-speed from Cobalt XFE in HHR?
Would there be any benefit in swapping the standard 5-speed for the special 5-speed that came in the XFE Cobalt?
They had a 3.63 gear ratio instead of the HHR's stock 4.17 (or 3.95 in 2009-11 models).
My goal would be improved fuel economy.
The transmissions are available locally for less than $200.
They had a 3.63 gear ratio instead of the HHR's stock 4.17 (or 3.95 in 2009-11 models).
My goal would be improved fuel economy.
The transmissions are available locally for less than $200.
Last edited by Heritage High Roof; Apr 1, 2018 at 06:19 PM.
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From: Fredericksburg,VA
Looks like it would bolt on to a 2.2L. From my reading it is 3.63 is 2009-. Evidently the ECM tuning changed to standard equipment in 2009 (VVT), so the only difference is the trans.
So, yes you would gain about 1 MPG city 3 MPG highway. I don't think you would be able to use 5th in the city.
So, yes you would gain about 1 MPG city 3 MPG highway. I don't think you would be able to use 5th in the city.
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From: California
I would also want to know what the ratio is in each gear, compared to stock, before I made that decision.
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Joined: 01-03-2011
Posts: 46
From: MN
The final drive ratio is the only thing that changes. All versions have the same specific gear ratios and spacing.
I need to correct the original post as the F23 5-speed in the 2006-08 HHR actually has a gear ratio of: 4.17 and the 2009-11 was changed to 3.95.
The standard ratio in the Cobalt was 3.84 and the XFE had 3.63.
I need to correct the original post as the F23 5-speed in the 2006-08 HHR actually has a gear ratio of: 4.17 and the 2009-11 was changed to 3.95.
The standard ratio in the Cobalt was 3.84 and the XFE had 3.63.
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Joined: 10-17-2018
Posts: 109
From: FL
depends on how long you plan on keeping the HHR
if you plan on keeping it long term, then it would pay for itself in a couple years. but outside of that I dont see it worth it time and $$.
but it is something to consider for someone like myself, who plans on keeping my HHR and passing it along to my son. Im pretty happy with the mpg I get now, or I should say Im surprised, as I see a solid 31-33 avg at highways speeds of 70mph with no traffic and no wind. if I get behind someone, Ive seen it go as high as 45mpg (scangauge verified) so a solid 2-3mpg gain on the highway would be worth it to me, especially since 90% of my driving is highway. :)
if you plan on keeping it long term, then it would pay for itself in a couple years. but outside of that I dont see it worth it time and $$.
but it is something to consider for someone like myself, who plans on keeping my HHR and passing it along to my son. Im pretty happy with the mpg I get now, or I should say Im surprised, as I see a solid 31-33 avg at highways speeds of 70mph with no traffic and no wind. if I get behind someone, Ive seen it go as high as 45mpg (scangauge verified) so a solid 2-3mpg gain on the highway would be worth it to me, especially since 90% of my driving is highway. :)
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