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73-87chevytrucks.com
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73-87 Chevy _ GMC Trucks
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14 bolt SF vs. 14 bolt FF
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Topic: 14 bolt SF vs. 14 bolt FF (Read 7249 times)
snibook7537
Registered Users
Posts: 118
Vince Ziolkowski
14 bolt SF vs. 14 bolt FF
«
on:
March 06, 2012, 12:27:33 PM »
I might be buying an 1983 GMC k2500 with a 6.2 and a plow. The truck is an 83 so it's got the semi float rear end. I have a rot box 87 v3500 thats just sitting around rotting more. My question is would it be worth it to swap the full floater to the 3/4 ton truck if the gears are the same? I think I remember reading somewhere that the spring perches are different on one tons and 3/4 tons, is that true? Also am I actually going to really ever hurt the semi floater? I will mainly be plowing and scrapping stuff with it I occasionally put a real load on the 1 ton and I do occasionally do put a pretty heavy load when I'm scrapping but I kind don't know if it would be worth all the screwing around? I can't see myself doing any serious towing in the foreseeable future so maybe take that into account as well.
Thanks
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1984 Fiero se pwr windows Holley TBi, cam, 86 5spd
1987 GMC V3500 350 TBi 4spd 205 t-case
Shoulda never sold:
1976 c-10 beater 250-6 4spd no pwr steering, brakes. Recycling truck
zieg85
Global Moderator
Senior Member
Posts: 7545
Re: 14 bolt SF vs. 14 bolt FF
«
Reply #1 on:
March 06, 2012, 03:32:48 PM »
Read through
http://forum.73-87chevytrucks.com/smforum/index.php/topic,23173.0.html
and see what Blazin thinks...
I thought the 83 K2500 with a diesel got the 14 bolt FF but maybe not. If the 87 V3500 is not a cab and chassis the rear end should fit fine.
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Carl
1985 C20 Scottsdale 7.4L 4 speed 3.21
1986 C10 under construction
https://www.facebook.com/groups/248658382003506/
Jason S
Senior Member
Posts: 1561
Re: 14 bolt SF vs. 14 bolt FF
«
Reply #2 on:
March 06, 2012, 05:54:05 PM »
I've personally seen the semi-float 14 bolts doing jobs that a Dana 80 really should be doing. Specifically, it was under a late 80's Chevy K2500 pulling a gooseneck trailer with 4 cords of green oak firewood - the guy delivering the wood had a few screws loose - definitely don't try this at home.
Of course it wouldn't hold up for over a few months under those conditions. So when the semi-float broke, he'd just put swap another rear end under the truck.
The point is, the semi-float 14 bolt rear end he had under the truck held up for a remarkable amount of time considering the weight he was pulling and would probably do fine under your conditions.
My $0.02: Run the semi-float until it breaks. If it doesn't break and you get tired of looking at a flat hub on the rear end, then swap in the full-float axle.
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1973 GMC K2500, Super Custom, Camper Special, 350, TH350, NP203, 4.10's
1974 Chevrolet K10, Custom Deluxe, 350, SM465, NP203, 3.73's
"1) Peace through strength; 2) Trust but verify; 3) Beware of evil in the modern world"
bake74
Senior Member
Posts: 5871
Re: 14 bolt SF vs. 14 bolt FF
«
Reply #3 on:
March 06, 2012, 06:47:24 PM »
I am with Jason S on this one. You don't sound like you need the FF on your truck unless you want the bragging rights.
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#1: The easiest and most obvious solution to any problem is 99% of the time correct.
#2: There is no such thing as impossible, it just takes longer.
74 k10, 77k10 Tom
snibook7537
Registered Users
Posts: 118
Vince Ziolkowski
Re: 14 bolt SF vs. 14 bolt FF
«
Reply #4 on:
March 07, 2012, 11:50:41 AM »
Thanks guys thats kind of what I was thinking. I don't really think it will break as I did a lot of stupid stuff with a 12 bolt in my c10 but this will see a lot more work so I wasn't sure. Thanks to all of you who replied.
Logged
1984 Fiero se pwr windows Holley TBi, cam, 86 5spd
1987 GMC V3500 350 TBi 4spd 205 t-case
Shoulda never sold:
1976 c-10 beater 250-6 4spd no pwr steering, brakes. Recycling truck
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73-87 Chevy _ GMC Trucks
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14 bolt SF vs. 14 bolt FF