4.56 front end?
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Joined: Nov 2012
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From: Michigan
4.56 front end? ive got a 2000 gmc sierra 1500 4x4. right now it has 3.73 gears. im looking to put 4.56's in it. do they make them for the front dif? i cant find them anywhere online. any help?
They sure do. I have 4.88s in my '00 1500. I bought Motives from Summit Racing. They've been in for a little over 3 years and around 50k. Not a single issue and still perfectly quiet.
It's pretty stout for what it is. A stock geared truck, even with stock size tires, doesn't want any. Ive even pulled one of the newest 5.3s with the 243 heads from a dig and slow roll. He couldn't pull on me til after 75 mph. However, my truck has always ran strong compared to all the other 99+ 5.3 trucks Ive compared it to.
In the spring/summer/fall, I have squeezed out low-mid 15mpg out of it. BUT, that's driving around 50 mph. It generally gets upper 13s to mid 14s. That's a mix of rural country roads and a tad bit of city.
In the spring/summer/fall, I have squeezed out low-mid 15mpg out of it. BUT, that's driving around 50 mph. It generally gets upper 13s to mid 14s. That's a mix of rural country roads and a tad bit of city.
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Thread Starter
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Joined: Nov 2012
Posts: 15
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From: Michigan
yeah the main reason i want to do the swap is because my truck is a turd compared to other 5.3's my buddys have. and it only gets around 12-13 mpg when im nice to it. i dont drive highways but maybe once a year.
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I was in the process of adding a suspension lift, so I yanked the rear end and front out and took it the best gear set up guy I know and had him do it while I did the lift. He is a tool maker at GE, and he actually made a special tool at work to make things smoother/easier. It's more aggravating than the rear is.
I was in the process of adding a suspension lift, so I yanked the rear end and front out and took it the best gear set up guy I know and had him do it while I did the lift. He is a tool maker at GE, and he actually made a special tool at work to make things smoother/easier. It's more aggravating than the rear is.
Thread Starter
Registered User
Joined: Nov 2012
Posts: 15
Likes: 0
From: Michigan
i run a 275-70-18...so its just over 33 inches. and my dad is a mechanic and can do it no problem. i just dont wanna waste 8 hours of his time tearing apart the whole front end of my truck. the rear is the easy one..i can do that myself.
