273 gear to 373 or similar..
04-07-2009, 04:43 PM
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273 gear to 373 or similar..
Hi, amigos...
Im from Mexico.. I have a 98 aut corvette original has 273 gears.. so its very slow when accelerate..
I wanna change them but Ive heard no every gear fit it? something about carrier? like 373 or 390..??
I just wanna change and put new one...
Somebody can help about brands ans sizes please .. thnks...
Im from Mexico.. I have a 98 aut corvette original has 273 gears.. so its very slow when accelerate..
I wanna change them but Ive heard no every gear fit it? something about carrier? like 373 or 390..??
I just wanna change and put new one...
Somebody can help about brands ans sizes please .. thnks...
04-07-2009, 04:50 PM
#2
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I think DTE can arrange it so that you can put higher gear ratios in a 2.73 carrier. There are some places that can't/won't do it.
The other option is just to order a complete differential. Some people with stick shifts sell off the entire 3.42 setup from their cars when the move up in gears. They can be a good bargain and the MN6 diff can be used with an A4. Check the for sale section.
I believe you just have to move an adapter plate from the old differential to the new one when installing it. When I upgraded my 3.15's. I had them get a new stock Z06 unit. They gear set is stronger.
The other option is just to order a complete differential. Some people with stick shifts sell off the entire 3.42 setup from their cars when the move up in gears. They can be a good bargain and the MN6 diff can be used with an A4. Check the for sale section.
I believe you just have to move an adapter plate from the old differential to the new one when installing it. When I upgraded my 3.15's. I had them get a new stock Z06 unit. They gear set is stronger.
04-07-2009, 08:03 PM
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Another great option is Rodney from RPM. I had my diff shipped to RPM, they installed 3:73's with hardened shafts and sent it back for my shop to install. Been very happy since! 
04-07-2009, 08:09 PM
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04-07-2009, 09:12 PM
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Ive checking and I found a 3.90 motive gear for 273 carrier... like mine .. have u hear something about it?
Gracias...
04-07-2009, 10:07 PM
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I think DTE can arrange it so that you can put higher gear ratios in a 2.73 carrier. There are some places that can't/won't do it.
The other option is just to order a complete differential. Some people with stick shifts sell off the entire 3.42 setup from their cars when the move up in gears. They can be a good bargain and the MN6 diff can be used with an A4. Check the for sale section.
I believe you just have to move an adapter plate from the old differential to the new one when installing it. When I upgraded my 3.15's. I had them get a new stock Z06 unit. They gear set is stronger.
The other option is just to order a complete differential. Some people with stick shifts sell off the entire 3.42 setup from their cars when the move up in gears. They can be a good bargain and the MN6 diff can be used with an A4. Check the for sale section.
I believe you just have to move an adapter plate from the old differential to the new one when installing it. When I upgraded my 3.15's. I had them get a new stock Z06 unit. They gear set is stronger.
Im very confused... I only found a motive gear 3.90 taht fits 273 carrier.. but is not to much???
tahnks.....
04-07-2009, 10:48 PM
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There are a few people that use 3.90's in an automatic. Your gas mileage will definitely decrease, but some people love them.
04-10-2009, 02:20 PM
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If i want to conserve my 273 carrier only fits the 3.90 gear?
I think ii to much no? 95% driving is in city!.. what do u thinK? a lot os gas no?
04-10-2009, 02:36 PM
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Have you tried contacting any of the forum vendors like RPM or DTE to see what they can get for you?
04-10-2009, 04:10 PM
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St. Jude Donor '08-'09
As far as I know, you have to get a special set of gears to change the 2.73's in the stock carrier. A regular set from a manual with a 3.42 will not fit. I went with a complete new 3.42 ZO6 rear and the car runs great. I don't think I would recommend anything higher than 3.42 unless you want a car for the drag strip.
A new ZO6 carrier is not cheap, but you can find a used one without too much mileage on it for about $500 or so.Or, you can just get a used M6 rear which is a 3.42 too.
Expect to get lower mileage, and you must get a tune to get the computer to recognize the new gears, and to get the shift points right.
A new ZO6 carrier is not cheap, but you can find a used one without too much mileage on it for about $500 or so.Or, you can just get a used M6 rear which is a 3.42 too.
Expect to get lower mileage, and you must get a tune to get the computer to recognize the new gears, and to get the shift points right.
04-11-2009, 12:41 PM
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As far as I know, you have to get a special set of gears to change the 2.73's in the stock carrier. A regular set from a manual with a 3.42 will not fit. I went with a complete new 3.42 ZO6 rear and the car runs great. I don't think I would recommend anything higher than 3.42 unless you want a car for the drag strip.
A new ZO6 carrier is not cheap, but you can find a used one without too much mileage on it for about $500 or so.Or, you can just get a used M6 rear which is a 3.42 too.
Expect to get lower mileage, and you must get a tune to get the computer to recognize the new gears, and to get the shift points right.
A new ZO6 carrier is not cheap, but you can find a used one without too much mileage on it for about $500 or so.Or, you can just get a used M6 rear which is a 3.42 too.
Expect to get lower mileage, and you must get a tune to get the computer to recognize the new gears, and to get the shift points right.
I was thinking If will be better to put a torque converter like 2600-2800 on mine OEM 273 gear and not to change them?
Any opinion?
thanks...
Last edited by jarqlgrq; 04-11-2009 at 12:48 PM.
04-11-2009, 12:44 PM
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.. i usually visit AMECA..about an hour south of you 
04-11-2009, 12:47 PM
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I wouldn't tear down the the rear diff just for a converter. The converter won't give you the increased effective torque that you get from the gears.
04-11-2009, 12:49 PM
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Im very confused...
I dont know if put a new torque converter 2600 in my 273 gears.. or only I will spend my money ja...
gracias amigo
04-11-2009, 12:51 PM
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04-11-2009, 12:53 PM
#17
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EDIT: Are there junkyards anywhere near you that might have a wrecked vehicle you can get the rear end from?
Last edited by chaase; 04-11-2009 at 12:59 PM.
04-11-2009, 01:00 PM
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A new converter with 2.73 is just a waste of money in my opinion. A converter and a higher gear set like 3.42 is a great combination. You may be better off trying to find a used 3.42 differential and swapping everything out.
EDIT: Are there junkyards anywhere near you that might have a wrecked vehicle you get get the rear end from?
EDIT: Are there junkyards anywhere near you that might have a wrecked vehicle you get get the rear end from?
04-11-2009, 01:04 PM
#19
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You don't need to have a lot of choice. Any Corvette stick shift from 1997-2004 will have the 3.42 gear set and any automatics with the performance axle, which will have the 3.15 gear set, will also work.
04-11-2009, 01:49 PM
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You may be better off trying to find a used 3.42 differential and swapping everything out.
Absolutely the best route to go for the least amount of $$$. There are many of them out there off of 6 speed corvettes which have gone to other gear ratios. A differential from any 6 speed C5 or Z06 will work.