1992 rear end swap HELP!!

[Cody Cheyenne Henson]

So I have a 1992 Chevy Silverado 1500 single cab short bed 4.3 5 speed. So I'm sitting at a red light and put the truck in first to take off and it's acting like the part ng brake is on so I check just to make sure (it's not) I try again same thing so I see that I can back up so I do into a gas station where further examination makes me start to think it's my rear end get it towed to my house and get the diferincal cover off and have a look well looks like i have F***ed up my rear end I have found another one but I'm not sure if it's gonna effect anything to change it out because my understanding is that the one that is under it right now is a 3.08:1 and the one that I have found is a 3.73:1.

1-can it be done
2-what will it effect
3-whats the differences in the 3.08:1 and the 3.73:1

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[skylark]

1. Yes. Just make sure that it is from another 2wd.
2. and 3. Your rpm's will be higher in all gears at the same speed because a 3.08 is a higher ratio than 3.73. Your speedo will be off. The upside is that it will be easier for the truck to get moving. Downside is potentially worse fuel economy.

 

[Ironhead]

With the 5 speed, I have a hunch you will find the truck more fun to drive with the 3.73 gear set. I've got that gear with my 5.7 and 45l60E, and the rpms at 60 mph are around 1900, as near as I can recall. I would think that the OD with your manual box will be close, so should be good.

Perhaps someone knows if the speedo is driven by the computer, and whether it can be re-calibrated to be accurate.

 

[Cody Cheyenne Henson]

Yea it would be great to be able to rest that spedo any body has some info that would be great

 

[skylark]

You can put a set of dip switches in the DRAC and make it adjustable.

 

[df2x4]

Yea it would be great to be able to rest that spedo any body has some info that would be great

http://www.tbichips.com/drac/

 

[skylark]

http://www.tbichips.com/drac/

Thanks, I was just going to find that for him.

 

[df2x4]

Thanks, I was just going to find that for him.

No problem!

 

[Cody Cheyenne Henson]

Thank everybody for the help

 

[df2x4]

Thank everybody for the help

You're welcome! Hope you get it figured out.