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I had been thinking that the ME would use a traditional transaxle (transmission/differential in one unit) with the engine bolted to it. But in reading a lot of the threads I am feeling that some feel it will be like a C7 with a separate transmission bolted to the differential and then the engine bolted to them.
Does anyone have any real insight on this?
Seems that the traditional transaxle would be better space management as the C7 configuration would be much longer.
Based on the leaked CAD drawings the C8 will have a stonking transaxle.
Possible technical specifications, but these are for Tremec's front-mounted DCT, not for the rear mounted transaxle in the C8. The technical sheet implies that the specs apply to RWD, AWD, and transaxle designs, and the torque limits are both within about 50 lb-fit of the rumored engines (LT1 successor and a 'Vette version of Cadillac's 4.2TT DOHC V8).
Last edited by Zaro Tundov; Nov 17, 2018 at 05:06 PM.
Based on the leaked CAD drawings the C8 will have a stonking transaxle.
Possible technical specifications, but these are for Tremec's front-mounted DCT, not for the rear mounted transaxle in the C8. The technical sheet implies that the specs apply to RWD, AWD, and transaxle designs, and the torque limits are both within about 50 lb-fit of the rumored engines (LT1 successor and a 'Vette version of Cadillac's 4.2TT DOHC V8).
Those are not xaxles. The new gearbox does not have a model number yet. GM has been working with Tremec for over 4 years now and since then, the Mexican based company has purchased the Belgium company, Hoerbiger Drivetrain Mechatronic who is the OEM xaxles for German makes. The gearbox above is ZF whom GM has also been talking to. With the Hoerbiger connection, a 6 speed manual is available for the 500hp OHV engine without a problem. We shall see soon enough.
Those are not xaxles. The new gearbox does not have a model number yet. GM has been working with Tremec for over 4 years now and since then, the Mexican based company has purchased the Belgium company, Hoerbiger Drivetrain Mechatronic who is the OEM xaxles for German makes. The gearbox above is ZF whom GM has also been talking to. With the Hoerbiger connection, a 6 speed manual is available for the 500hp OHV engine without a problem. We shall see soon enough.
Ok, so where is the differential in that CAD drawing? Because what I see is a single mechanical unit behind the engine that combines the functions of the gearbox and the differential, i.e., a transaxle.
Last edited by Zaro Tundov; Nov 17, 2018 at 07:01 PM.
Based on the leaked CAD drawings the C8 will have a stonking transaxle.
Possible technical specifications, but these are for Tremec's front-mounted DCT, not for the rear mounted transaxle in the C8. The technical sheet implies that the specs apply to RWD, AWD, and transaxle designs, and the torque limits are both within about 50 lb-fit of the rumored engines (LT1 successor and a 'Vette version of Cadillac's 4.2TT DOHC V8).
Originally Posted by Shaka
Those are not xaxles. The new gearbox does not have a model number yet. GM has been working with Tremec for over 4 years now and since then, the Mexican based company has purchased the Belgium company, Hoerbiger Drivetrain Mechatronic who is the OEM xaxles for German makes. The gearbox above is ZF whom GM has also been talking to. With the Hoerbiger connection, a 6 speed manual is available for the 500hp OHV engine without a problem. We shall see soon enough.
Good info, thanks. So looks as if we could have multiple transmissions: DCT, Manual, and, maybe, an old fashion automatic.
The leaked CAD images clearly show what we are getting.
Not true. The CAD files were explored and published 4 years ago. The model numbers above refer to Tremec gearboxes behind a FE car. They won't be ZF units.
Not true. The CAD files were explored and published 4 years ago. The model numbers above refer to Tremec gearboxes behind a FE car. They won't be ZF units.
That's not true. The Tremec technical specs PDF states in regard to those model numbers:
Modular design for rear-wheel drive (RWD), all-wheel drive (AWD) and trans-axle platforms
Ok, so where is the differential in that CAD drawing? Because what I see is a single mechanical unit behind the engine that combines the functions of the gearbox and the differential, i.e., a transaxle.
Sorry, my comprehensions is not great, I based my comment on the front engine units you posted without reading your text. The CAD file shows a ZF Xaxle.
I had been thinking that the ME would use a traditional transaxle (transmission/differential in one unit) with the engine bolted to it. But in reading a lot of the threads I am feeling that some feel it will be like a C7 with a separate transmission bolted to the differential and then the engine bolted to them.
Does anyone have any real insight on this?
Seems that the traditional transaxle would be better space management as the C7 configuration would be much longer.
I've been on this forum for most of the year and I've seen no discussion that the car will have anything other than an integrated transaxle bolted up to the engine. Nothing else makes sense. Although there are wishes for a manual, not one of the test cars seen so far is a manual. They have all been DCT.
There has also been endless debate about the leaked CAD which shows a ZF transaxle. No one knows the true provenance of that drawing. It could simply have been a concept. Counter to that, the auto press has consistently been reporting for several years now that GM is working with Tremec on a 7-speed DCT transaxle. And certainly Tremec have such a thing.
Not true. The CAD files were explored and published 4 years ago. The model numbers above refer to Tremec gearboxes behind a FE car. They won't be ZF units.
How can you tell if a car has a DCT? (Serious question)
They heavily screw with fueling and ignition cuts to make it shift smooth and protect the delicate clutches and input shafts. The sound when shifting is unique.
Engine/Trans/Diff layout
