273 to 342,s

[JSH]

Hi all. Thinking of changing my rear 273 gears to 342,s, an was wondering who out there has done this modification, and what is all involved to do it, and roughly the cost. I have read the difference is light night and day . It's an automatic, and mainly street driven, no racing, but I do love torque, and realize it will affect my gas mileage a bit, and who in the Niagara area would be the best shop to take it too?

 

[CableGuy]

Night and day difference to say the least! Contact Dave @ Race Ready Garage. He would be the closest shop to you (he did mine).

 

[12cents]

I did the same to my Camaro years ago. Night and day difference just doesn't describe the difference, LOL. that car was a lot of fun to drive after the change. Around town mpg didn't change much but on the highway it was noticeable. Be prepared to change your torque convertor as well to a higher stall.

 

[JSH]

Thanks for the information , any idea what I would be looking at cost wise ? also realize that I can not just change the gears unfortunately, so I assume the best way would be to maybe look for one complete from a ZO6?

 

[Rruuff Day]

CableGuy is correct. Call Dave at RaceReady. He's going to be the most accurate on what it will consist of and how much it will cost.

 

[12cents]

I have no idea of the cost these days but I wouldn't hesitate to do it again... if I had to.

 

[Rruuff Day]

Thanks for the information , any idea what I would be looking at cost wise ? also realize that I can not just change the gears unfortunately, so I assume the best way would be to maybe look for one complete from a ZO6?

The C5 manual tranny rear gears were all 3.42's.

 

[link9]

GU2 Axle, Rear, 2.73 Ratio
GU6 Axle, Rear, 3.42 Ratio
G90 Axle, Rear, 3.15 Ratio

 

[JSH]

I will give Dave a call at Race ready, and see what he says. Thanks for all the input guys. Here we have another storm to get through starting tomorrow, hopefully it will be the last one, I hope, and finally we got rid of January. personally my worst month. Have a good one, stay safe.

 

[TCinthe6]

I've been running 3.89s in my Camaro with an LS3 and T56 magnum. The pinion and ring are not that expensive...maybe $250 USD. As long as you aren't buying a new diff or monkeying around with much else, it should just be the parts, diff oil, shop supplies, and about 3 hrs labour to re and re everything.

It will really wake the car up.

 

[JSH]

Race ready got back to me and told me that they are not into rebuilding differentials at there new location, and to find a reputable transmission shop. Oh well we shall see what happens.

 

[JSH]

Does anyone out there know where to purchase a 342 differential carrier for a decent price?

 

[link9]

Does anyone out there know where to purchase a 342 differential carrier for a decent price?

ebay .. great price ...contact the sealer for shipping cost

1997 04 Chevrolet Corvette C5 Z06 OEM Manual Rear Differential 3 42 Ratio Getrag for sale | eBay

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or

OEM GM Rear End Differential 3 42 SP GETRAG For 1997 2004 Corvette C5 Z06 for sale | eBay

Find great deals on eBay for OEM GM Rear End Differential 3 42 SP GETRAG For 1997 2004 Corvette C5 Z06. Shop with confidence.

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[JSH]

Have been looking quite a bit, and E-bay seems to be the only ones that I could get one from, but thought there has to be someplace in Canada where I could pick one up without paying up to $300.00 shipping, plus exchange rate, plus GST once it gets over here. Maybe I will get lucky and someone is changing there's to a 373, or 410. We shall see.