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04-08-2018, 10:55 AM | #1 |
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Join Date: Jun 2006
Location: Cape Cod, Ma.
Posts: 236
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Question on swapping to a 00-07 GM 14 bolt on my 66 GMC
I have an opportunity to pick up a GM 14 bolt full floater with disc brakes and 4:10 gears for my 1966 GMC one ton. The friend of a friend has 3-4 SRW differentials pulled from GM 2500HDs ranging between 2000-2007.
I'm about to swap out the front drum brakes and suspension for modern disc brake suspension from a 1989 R3500. Staying with 8 lug one ton gear. My thinking is the 14 bolt would give me more available parts and a parking brake. I would just have to buy a different portioning valve. MY questions are: - Can I use my dual rear wheels over the disc brakes? - What other hidden surprises am I missing?
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1966 GMC 1 Ton 305 V6 SM420 4 speed - retired Fire Dept Support Truck from Little Falls, NJ My GMC Photos |
04-08-2018, 12:05 PM | #2 |
1965 Chevy C10, 2005 4.8L/4l60
Join Date: Aug 2004
Location: DFW Texas
Posts: 8,545
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Re: Question on swapping to a 00-07 GM 14 bolt on my 66 GMC
I think those differentials are much wider that your stock one, like 5-6” wider, have you measured?
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04-08-2018, 01:44 PM | #3 |
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Join Date: Jun 2006
Location: Cape Cod, Ma.
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Re: Question on swapping to a 00-07 GM 14 bolt on my 66 GMC
I'm working away from home so I haven't measured either yet.
I was thinking about changing to a SRW because of the hassle of registration and insurance in Massachusetts. I have to register and insure as a commercial vehicle..... but, I really like the DRW look and with the narrow rear axle the duallys fit nicely under my stepside bed.
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1966 GMC 1 Ton 305 V6 SM420 4 speed - retired Fire Dept Support Truck from Little Falls, NJ My GMC Photos Last edited by wcstory; 04-08-2018 at 10:00 PM. |
04-08-2018, 04:26 PM | #4 |
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Join Date: Sep 2010
Location: Hancock Md
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Re: Question on swapping to a 00-07 GM 14 bolt on my 66 GMC
Wow yeah you have the narrow rear, the new axle is going to be wider than what you have. I keep thinking early narrow DRW was around 63.5" WMS and the newer SRW would be near 69"
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04-08-2018, 10:01 PM | #5 |
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Join Date: Jun 2006
Location: Cape Cod, Ma.
Posts: 236
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Re: Question on swapping to a 00-07 GM 14 bolt on my 66 GMC
Found this reference
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1966 GMC 1 Ton 305 V6 SM420 4 speed - retired Fire Dept Support Truck from Little Falls, NJ My GMC Photos |
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