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Discussion Starter · #1 ·
I've been trying to soak up as much Cruze info as I can while I wait on the diesels to show up and ran across this article: 2016 Chevrolet Cruze Manual First Drive – Review – Car and Driver

While that's definitely not a glowing review, I'll go for the manual anyway because I want the higher MPG and my commute is mostly rural highway where I'll be cruising in 6th anyway.

What I'm curious about is if it's the same transmission (and final drive ratio for that matter) going into the diesel as what was reviewed on the gas model by Car & Driver. One would think the diesel's different torque curve would benefit from different ratio spacings versus a gasser. Might be that the diesel is happier with the same transmission.

Looking forward to hearing from those who get to drive a diesel with the manual. The nearest one I've spotted at a dealer is two hours away, so I'm not getting my hands on one for a while yet.
 

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That review is for a 16 gasser, not sure I would compare a gasser to the diesel. I would like to drive the diesel in auto and manual, just not any close enough for me to do that.
 

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2014 Cruze Diesel, 2007 Cobalt, 1981 Camaro Z28, 2017 Volt
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Here are the transmission ratios (6-speed manual and 9-speed auto) for the diesel. The manual is a different code than the 6-speed used in the manual. Same trans, different ratios.

M3D 9T50: 4.69, 3.31, 3.01, 2.45, 1.92, 1.45, 1.00, 0.75, 0.62, 3.17 FD

MZ4 M32-6: 3.82, 2.05, 1.30, 0.96, 0.74, 0.61, 3.65 FD

Whereas the gas MF3 M32-6 has:

4.27 2.16 1.30 0.96 0.74 0.61, 3.83 FD
 
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They didn't have the final drive listed, but here are the transmission ratios (6-speed manual and 9-speed auto) for the diesel. The manual is a different code than the 6-speed used in the manual. Same trans, different ratios.

M3D 9T50: 4.69, 3.31, 3.01, 2.45, 1.92, 1.45, 1.00, 0.75, 0.62

MZ4 M32-6: 3.82, 2.05, 1.30, 0.96, 0.74, 0.61

Whereas the gas MF3 M32-6 has:

4.27 2.16 1.30 0.96 0.74 0.61
Text Line Number Font Parallel Text Line Number Font Parallel
 

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Discussion Starter · #6 ·
That's what I was looking for. For the diesel, they raised first gear a little and 2nd a smidge. Car & Driver was grousing about 2, 3, and 4 being too tall, but with the diesel's low-end torque, it should work out well for the diesel.

Anybody else notice that the maximum torque number for the transmission is significantly lower than the diesel engine's max torque rating? I hope that's a mistake on paper and not in application.
 

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That's what I was looking for. For the diesel, they raised first gear a little and 2nd a smidge. Car & Driver was grousing about 2, 3, and 4 being too tall, but with the diesel's low-end torque, it should work out well for the diesel.

Anybody else notice that the maximum torque number for the transmission is significantly lower than the diesel engine's max torque rating? I hope that's a mistake on paper and not in application.
Taller final drive, as well.

I did notice that too. Even if it's not, I know of plenty of F23 and F35 Cobalts making far more than their trans rating is, without issue, haha.
 

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That's what I was looking for. For the diesel, they raised first gear a little and 2nd a smidge. Car & Driver was grousing about 2, 3, and 4 being too tall, but with the diesel's low-end torque, it should work out well for the diesel.

Anybody else notice that the maximum torque number for the transmission is significantly lower than the diesel engine's max torque rating? I hope that's a mistake on paper and not in application.
That is what I noticed and why I posted the pictures.
 

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I wonder if the specs are a typo as far as the ratings... Is the transmission the same unit with different ratios in the lower gears or is it an actually different transmission with the same ratios in the upper gears??? Since the automatic in the 1st gen was a completely different unit I would suspect that there is a possibility that the manual is a different unit from the gasser to the diesel...
 

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Based on the GM Powertrain document I was looking at, it's the same trans, with a different RPO.
 
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