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07-22-2016, 09:45 PM
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#1 |
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user # 2756
 
Join Date: Jun 2001
Location: Chesapeake, Virginia
Posts: 4,612
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steering gear boxes
My 83 has crossover steering and thus a 2wd gearbox it also has vac assist brakes. The 86 K30 I am taking parts off of has hydro boost brakes with a 4wd gearbox.
Are the steering gear boxes different between the vac assist and hydro boost brakes? I want to swap the following from the 86 into my 83: Pedal assembly, hydro boost assembly and the power steering pump. I want to keep the 2wd steering gear box. With them both in the 80s I think they have the metric fittings on the hoses. Thanks,
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1970 K25, 8' stepside bed 350/465/205 44 up front, 60 in the rear 4.10s rolling on 33" Dunlop MTs 1986 K5, 350/465/208 Dana 60/14 bolt from a cucv 36" Super Swampers TSL/SX 1983 K20 w/ CUCV axles, 350/700R4/208 sitting on 37" Goodyears 1986 M1031 6.2 diesel, TH400/NP205 locker in the rear and a LS in the front, all stock for now..... 1986 K30, 350/400/205 dana 60 and 14 bolt. I kept the drivetrain. Body/bad and chassis are gone. 1981 K30, 350/465/205 dana 60 and dually 14 bolt. Has a G80, and a flat bed. Going to replace the flat bed. 1985 K20, 350/400/208 10 bolt and SF 14 bolt. I wonder where I can find some 1 tons. Hmmmmm 
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07-22-2016, 09:54 PM
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#2 |
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Special Order
  
Join Date: Nov 2004
Location: Mt Airy, MD
Posts: 85,863
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Re: steering gear boxes
I'm pretty sure the steering box is the same except for the extra port for the brakes.
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"BUILDING A BETTER WAY TO SERVE THE USA"......67/72......"The New Breed" GMC '67 C1500 Wideside Super Custom SWB: 327/M22/3.42 posi.........."The '67" (project) GMC '72 K2500 Wideside Sierra Custom Camper: 350/TH350/4.10 Power-Lok..."The '72" (rolling) Tim "Don't call me a redneck. I'm a rough cut country gentleman" R.I.P. ~ East Side Low Life ~ El Jay ~ 72BLUZ ~ Fasteddie69 ~ Ron586 ~ 67ChevyRedneck ~ Grumpy Old Man ~ |
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07-23-2016, 04:02 PM
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#3 |
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Currently Blazerless
Join Date: Apr 2000
Location: St. Joseph Mo.
Posts: 4,826
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Re: steering gear boxes
There is no difference at all between gearboxes. 1980 and below will be SAE fittings and metric for 81 up. As far as the power steering pump it will have 2 return ports in the reservoir in a hydro-boost setup...nice but it's no big deal to use the standard single return pump and T in your return line from hydro-boost. In fact GM did this themselves on some vehicles like the P30 chassis.
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1972 C/30 133" W.B. C&C 1970 GMC 3500 157" W.B. single wheel C&C |
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07-24-2016, 08:13 PM
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#4 |
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user # 2756
Join Date: Jun 2001
Location: Chesapeake, Virginia
Posts: 4,612
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Re: steering gear boxes
Thanks for the replies. I plan on swapping the booster/pump/pedals from the 86 K30 to the 83 k20.
__________________
1970 K25, 8' stepside bed 350/465/205 44 up front, 60 in the rear 4.10s rolling on 33" Dunlop MTs 1986 K5, 350/465/208 Dana 60/14 bolt from a cucv 36" Super Swampers TSL/SX 1983 K20 w/ CUCV axles, 350/700R4/208 sitting on 37" Goodyears 1986 M1031 6.2 diesel, TH400/NP205 locker in the rear and a LS in the front, all stock for now..... 1986 K30, 350/400/205 dana 60 and 14 bolt. I kept the drivetrain. Body/bad and chassis are gone. 1981 K30, 350/465/205 dana 60 and dually 14 bolt. Has a G80, and a flat bed. Going to replace the flat bed. 1985 K20, 350/400/208 10 bolt and SF 14 bolt. I wonder where I can find some 1 tons. Hmmmmm
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07-28-2016, 08:20 PM
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#5 |
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Registered User
Join Date: Feb 2011
Location: Under the Truck Dreaming
Posts: 642
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Re: steering gear boxes
I added hydroboost a couple of months ago and it was probably the easiest mod I have done. I had custom hoses made at a NAPA store. I paid a little more for the hoses than I really wanted but when I installed them it was exactly what I was shooting for. I kept my original steering gear.
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72 K20 Custom Camper, D60, 14BFF, full roller 406 TPI w custom built ECU and yes..it has tow hooks... |
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