C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine

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Old Mar 3, 2015 | 11:42 AM
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Default Gearing

I have done some searching with different words and nothing has come up. What are you guys/gals going with on C4 cars with M6 trans? I was thinking 4.11's?? I heard 3.07 is the performance gears these cars come with. Sounds pretty week. What the heck do the C4's come with as a standard gear set, 2.73's??
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Old Mar 3, 2015 | 12:01 PM
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http://temp.corvetteforum.net/c4/vader86/rearaxle.html
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Old Mar 3, 2015 | 12:02 PM
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My 90 Vert has the 3:33 Dana 44. Great for all around street driving. Never been on the track tho.
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Old Mar 3, 2015 | 12:13 PM
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I have a 4.10 gear in the 93. Night and day difference, really wakes the car up. :thumb

If majority of your driving is in the city, you'll be doing alot more shifting. Just something to consider.
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Old Mar 3, 2015 | 12:16 PM
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Thank you sir
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Old Mar 3, 2015 | 01:11 PM
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It depends on what you are going to do with the car. 3.73 is a great small block gear choice, unless you have a huge cam and such. Tax refund money is putting a 3.73 in my '87.
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Old Mar 3, 2015 | 01:12 PM
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ZF6 speed cars came with 3.45... I changed my 91 to 3.73.
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Old Mar 3, 2015 | 02:40 PM
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Originally Posted by We Gone
ZF6 speed cars came with 3.45... I changed my 91 to 3.73.
Looks like I will be leaving the gears alone then. Though the 94 m6 came with weak gears.
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Old Mar 3, 2015 | 03:06 PM
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Originally Posted by We Gone
ZF6 speed cars came with 3.45... I changed my 91 to 3.73.
Actually an M6 could have been built with a 3.54 ('89 builds), 3.33 ('89 late & '90), 3.45 (some '90 & '91 L98 cars and on paper ZR-1 cars. There are reported unusual occurances of any of these. '92+ cars are 3.45 on paper.
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Old Mar 3, 2015 | 03:32 PM
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Originally Posted by WVZR-1
Actually an M6 could have been built with a 3.54 ('89 builds), 3.33 ('89 late & '90), 3.45 (some '90 & '91 L98 cars and on paper ZR-1 cars. There are reported unusual occurances of any of these. '92+ cars are 3.45 on paper.
I'm sure you are spot on, Sorry if I posted erroneous information. but I was under the impression 3.45 was the most common and I believe the car in question is a 94 or 96 from the OP's other posts.
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Old Mar 3, 2015 | 03:51 PM
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Ive got 3.73's in my vert and its one narly beast with the 383 motor. Gas mileage SUCKS but it get crazy fast.

I wouldn't go over 3.73's if it was me. To be honest if I was installing this myself I wouldn't go over 3.50something. It turns over to many rpms when cruising at interstate speeds.
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Old Mar 3, 2015 | 06:13 PM
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Originally Posted by crowz
Ive got 3.73's in my vert and its one narly beast with the 383 motor. Gas mileage SUCKS but it get crazy fast.

I wouldn't go over 3.73's if it was me. To be honest if I was installing this myself I wouldn't go over 3.50something. It turns over to many rpms when cruising at interstate speeds.
I have a 4.11 rear gear and turn 1800rpm at 70mph in 6th gear.
Will
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Old Mar 3, 2015 | 06:55 PM
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Originally Posted by rklessdriver
I have a 4.11 rear gear and turn 1800rpm at 70mph in 6th gear.
Will
Ok with an automatic I turn over 2000 rpm at 60 mph with 3.73's in top gear.
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