99 Suburban 2wd with 4:10 rear end????? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

72freak · 03-22-2006, 04:31 PM

I am watching a 1999 Suburban 2500 2wd on ebay. I have been looking for a 97-99 2wd 2500 suburban with a 5.7 for some time. This truck is perfect for me but I am not sure about that 4:10 rear end. A broker has the truck so there is no information about gas mileage. I am wanting to stay about 17-20 mpg and I am not sure if that 4:10 will allow it. Anyone know?

If that 4:10 is going to to mess up my mileage can I just change out the ring and pinion to a 3:73 or something? Are there any computer changes that have to be made? Any sensors need changing?

Any information would be appreciated. I normally work on the older stuff so this newer truck has me baffled.

72freak · 03-23-2006, 07:11 PM

So far it looks like all you have to do is change out the ring and pinion and then have the computer re-programed.

Not sure wether to go with the 373 or the 355?

Any thoughts?

rubrhammer · 03-31-2006, 09:47 PM

The gear set you choose should be determined by your intended use. Will you be towing anything? If so how heavy a trailer? I think you would have no chance of getting the mileage you want with the 4.10s IMO.

Terry Peerson · 04-02-2006, 08:10 AM

My 2004 Silverado SS has the 4:10 gears. It's AWD and has the 345hp, 6.0L engine. It is averaging @15mpg. Of course, that is not towing anything.

T

03-22-2006, 04:31 PM	#1
72freak Rottenwood Garage Member Join Date: May 2005 Location: Marietta, Georgia Posts: 4,321	99 Suburban 2wd with 4:10 rear end????? I am watching a 1999 Suburban 2500 2wd on ebay. I have been looking for a 97-99 2wd 2500 suburban with a 5.7 for some time. This truck is perfect for me but I am not sure about that 4:10 rear end. A broker has the truck so there is no information about gas mileage. I am wanting to stay about 17-20 mpg and I am not sure if that 4:10 will allow it. Anyone know? If that 4:10 is going to to mess up my mileage can I just change out the ring and pinion to a 3:73 or something? Are there any computer changes that have to be made? Any sensors need changing? Any information would be appreciated. I normally work on the older stuff so this newer truck has me baffled.

03-23-2006, 07:11 PM	#2
72freak Rottenwood Garage Member Join Date: May 2005 Location: Marietta, Georgia Posts: 4,321	Re: 99 Suburban 2wd with 4:10 rear end????? So far it looks like all you have to do is change out the ring and pinion and then have the computer re-programed. Not sure wether to go with the 373 or the 355? Any thoughts?

03-31-2006, 09:47 PM	#3
rubrhammer Registered User Join Date: Mar 2006 Location: Lyndonville ny Posts: 24	Re: 99 Suburban 2wd with 4:10 rear end????? The gear set you choose should be determined by your intended use. Will you be towing anything? If so how heavy a trailer? I think you would have no chance of getting the mileage you want with the 4.10s IMO.

04-02-2006, 08:10 AM	#4
Terry Peerson Registered User Join Date: Aug 2003 Location: Bonner Springs, KS Posts: 307	Re: 99 Suburban 2wd with 4:10 rear end????? My 2004 Silverado SS has the 4:10 gears. It's AWD and has the 345hp, 6.0L engine. It is averaging @15mpg. Of course, that is not towing anything. T __________________ 1972 Cheyenne (awaiting 2nd Restoration) 1996 Tahoe (Wife's Car) 1968 Volkswagen Beetle (My Daily Driver) 2004 Silverado SS (Can't afford to drive the dang thing with gas at $ 3.00)



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