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Old 07-17-2020, 05:15 PM   #1 (permalink)
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How's this for some tall gearing?

https://www.tremec.com/anexos/TR-908...duct.sheet.pdf

Saw this a bit ago. Man that's some tall gearing. I wonder what it's used in? I also wonder if it could be adapted for some of our "special" vehicles. RWD?

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Old 07-17-2020, 05:44 PM   #2 (permalink)
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Quote:
Originally Posted by hat_man View Post
https://www.tremec.com/anexos/TR-908...duct.sheet.pdf

Saw this a bit ago. Man that's some tall gearing. I wonder what it's used in? I also wonder if it could be adapted for some of our "special" vehicles. RWD?
Wow. Looks like 6, 7, and 8 are each taller than 5th in a 1992-1995 Honda Civic VX. That is tall!
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Old 07-18-2020, 12:17 AM   #3 (permalink)
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Quote:
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I wonder what it's used in?
C8 Corvette
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Old 07-18-2020, 03:13 AM   #4 (permalink)
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C8 Corvette
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https://www.midenginecorvetteforum.c...vette-stingray

>

.
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Old 07-18-2020, 11:39 PM   #5 (permalink)
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Its also going in a couple other "super car" class machines, it was joint developed between Tremec/GM/Chrysler/a couple truck builders,, I ran across it googling around..

IIRC they claim 2,000,000 mile life expectancy for the gear box, about half that for the 2 clutches.
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Old 07-19-2020, 10:30 AM   #6 (permalink)
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Mid engine Corvette eh? Can you imagine this adapted into a Fiero GT? Wouldn't that be a hoot do drive.
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Old 07-19-2020, 01:53 PM   #7 (permalink)
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The .33 over drive looks impressive on paper, but coupled to that low rear in gearing it's effectively the same as the 6 speed with the .5 over drive and 3.23 gears.
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Old 07-19-2020, 02:35 PM   #8 (permalink)
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Well that gives me some hope then.

My long term project is a 1976 Triumph TR7 with a GM L33 V8 (5.3L 300 rwhp after mods 340 ft/lbs Tq) and a Tremec T-56 6 speed (0.50 6th gear) and either 3.27 or 3.31 rear end and 24" tires. If I did the math right it should be around 1600 rpm at 70 mph and only weigh around 2600 lbs.

Hopefully EM will still be here when it's done (told you it was long term) and I can post some numbers. LoL
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Old 07-20-2020, 01:17 AM   #9 (permalink)
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I always take DCTs with a grain of salt, even though wet-clutch ones seem to fare better than dry-clutch. However, this one has caught my attention mostly for the low final ratio due to the presence of a transfer box, and the gears being quite close. Makes me wonder how a version with a taller final ratio and the gears spreaded further from each other could fare.
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Old 07-20-2020, 10:37 AM   #10 (permalink)
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Quote:
Originally Posted by hat_man View Post
Well that gives me some hope then.

My long term project is a 1976 Triumph TR7 with a GM L33 V8 (5.3L 300 rwhp after mods 340 ft/lbs Tq) and a Tremec T-56 6 speed (0.50 6th gear) and either 3.27 or 3.31 rear end and 24" tires. If I did the math right it should be around 1600 rpm at 70 mph and only weigh around 2600 lbs.

Hopefully EM will still be here when it's done (told you it was long term) and I can post some numbers. LoL
you can expect your fuel efficiency to be at 23mpg still ...

tahoe hybrid weighing in at 6500 pounds can do 85mph at 1800rpm (4 banger mode)barely get 26mpg..

it's in EVT mode when shifted to M4 it just the rpm to 2500 or so


6.0L engine LS2 based


at 30-40MPH she runs at 1,000 rpm..
45mph is 1050 rpm

at 40MPH steady you can expect to get about 40MPG in a 2600 pound car

I would expect the final numbers to be about 30City /40Highway

I suggest getting a hybrid V8 and disabling the AFM to use in it, the fuel efficiency will be in the 30-35 range.. even with it disabled
which is way better then the 5.3L which will be the mid to upper teens

It has way more power then a 5.3L engine (379HP/472ft combined output )

i don't think you will even need a drive shaft just connect the transmission output directly to the rear diff


Last edited by Tahoe_Hybrid; 07-20-2020 at 10:52 AM..
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