Change 8 bolt front hubs/rotors to 6 bolt? (gm 3/4 ton) - Hot Rod Forum : Hotrodders Bulletin Board
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Old 04-01-2007, 02:03 PM
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Change 8 bolt front hubs/rotors to 6 bolt? (gm 3/4 ton)

In my hunt for a good used 1/2 ton for a daily driver I came across and bought a sweet '99 Gmc Sierra 2500 2wd reg cab with only 60000 miles. It's got the 6.0 which is nice because I was having trouble even finding a 5.3 in a 2wd truck. On the down side it's got 4:10 gears which are not good on the highway. My plan is to swap in a complete good used 3:73 rear end (which is cheaper for me to do myself rather than pay someone to change gears in the current rear). I just came accross a guy with a wrecked 1500 with a 3:73 rear. Only thing is it's for 6 bolt wheels, not 8 bolt.
Here's what I'm wondering. If I use this rearend I could probably get a good deal on the 4 6bolt wheels and the parts to convert the front to 6 bolt hubs. How hard would it be to change the front to 6 bolt hubs?? I'm hoping I can use the existing spindles and just change the hubs. Anyone know?

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Old 04-01-2007, 11:37 PM
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Well I've come to my senses now. After thinking about it I think I'd be going to a heck of a pile of work in order to use parts off this guys 1500. I better continue looking around for a rear out of a 2500 to swap. Either that or learn how to swap out ring and pinion gears.
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Old 04-02-2007, 05:51 AM
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At the risk of appearing rude, it might be cheaper in the long run to pay a WELL RECOMMENDED pro to install the gears for you.
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Old 04-02-2007, 02:05 PM
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Quote:
Originally Posted by murrsue
In my hunt for a good used 1/2 ton for a daily driver I came across and bought a sweet '99 Gmc Sierra 2500 On the down side it's got 4:10 gears which are not good on the highway.
It being a 1999 ... does'nt it have a OD transmission ??
There is NOT a lot of difference RPM wise between a 3.73 and a 4.10 ... with the large tires that came on a 2500 series truck
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