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

D36 w/ 3.54

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Old Jan 8, 2008 | 06:21 PM
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Default D36 w/ 3.54

Everything I read indicates the D36 will break with lower gears. Will it be safe for the street?

I do not plan to take it to the track. Anyone out there do a gear change with a D36 and hasn't broke? Seems like gears are the best bang for the buck! I just don't want that Big bang to happen.

D44 is just to expensive for me! I just want to have my D36 set up!

Wish I had a six speed!
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Old Jan 8, 2008 | 06:25 PM
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Lower gears won't cause breakage. If you are near stock HP and not running drag slicks you will be fine.
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Old Jan 8, 2008 | 06:43 PM
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Originally Posted by BADDUCK
Lower gears won't cause breakage. If you are near stock HP and not running drag slicks you will be fine.
Its beating on lower gears that will cause breakage. You'll be fine though.
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Old Jan 8, 2008 | 07:02 PM
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My d33 has 3.73 with 2400stall and I have 315 Nitto drag radial which at the track Ive lowerd psi down to 20 and still I couldnt bust it. I might be one of the lucky few. I would say your fine for street use. DO IT! Dont forget to correct the speedo gear.
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Old Jan 8, 2008 | 07:22 PM
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Originally Posted by bobmic93
My d33 has 3.73 with 2400stall and I have 315 Nitto drag radial which at the track Ive lowerd psi down to 20 and still I couldnt bust it. I might be one of the lucky few. I would say your fine for street use. DO IT! Dont forget to correct the speedo gear.
What kind of 60' are you getting?
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Old Jan 8, 2008 | 07:28 PM
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Default Other track use?

What about road racing/autocross use? The car weighs in at about 2800 running 17 x 11.
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Old Jan 8, 2008 | 09:36 PM
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I have a D36 with 3.54 gears. No problems hear. My car goes to the track a couple times a year, but is primarily a toy, weekend cruiser. Torque is what can cause problems for a D36. A higher stall and some sticky tires can break it. With a stock converter and street tires it should be fine.
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Old Jan 8, 2008 | 10:22 PM
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I also have a D36 with 3.54 (originaly it was a 2.59) I have never been nice to it and it still works fine I have about 6,000 hard miles on it now But I am trying to blow it up so I can justify putting a D44 in it so it will probably last forever
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Old Jan 8, 2008 | 10:32 PM
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Originally Posted by Corvette Chris
What kind of 60' are you getting?
1.7s and 1.8s
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Old Jan 9, 2008 | 07:39 AM
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I am running 360rwhp with a ZF6 tranny with my D36 along with a 3.73 ring and pinion. I had the ring and pinion installed a couple of years ago, but we also rebuilt the unit with new bearings, etc. I take mine to the track and run it hard on the street with now problems (so far), but I run street tires. With drag radials and hard launches, some run into problems eventually especially at higher power levels.
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Old Jan 9, 2008 | 09:59 AM
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Thanks for the feedback guys. What will make my car quicker?

Roller Rockers w/New Springs? OR

Headers w/Hi Flow Cats? OR

3.54 Gears ?

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Old Jan 9, 2008 | 10:27 AM
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Originally Posted by bobmic93
1.7s and 1.8s
Thats good to hear. I've gotten 1.86-1.88s on street tires and when I saw the time slips I got a little worried about the rear end. Consistently cuts 1.92-1.96 60s, which is pretty good on street tires, IMHO.
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Old Jan 9, 2008 | 10:29 AM
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Originally Posted by ebusa
Thanks for the feedback guys. What will make my car quicker?

Roller Rockers w/New Springs? OR

Headers w/Hi Flow Cats? OR

3.54 Gears ?

An LT1? Definitely the gears. Then it'd be headers, followed by roller rockers.
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