Hydroboost & Hyd clutch what years?? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

cobinder · 11-25-2007, 09:22 PM

I've converted my 80 K20 to a 5 speed (NV4500) and rear discs. I'm wanting to install hydroboost and hyd clutch. But I don't know what GM years would be compatible for a 4 disc brake system and the NV4500 with a drivers side external slave cylinder.

Any help would be fantastic.

duallyjams · 11-25-2007, 09:58 PM

Late 80s trucks had hydraulic clutches, for the hydro boost brakes any one ton or diesel truck. you just to pay close attention because GM changed the fitting on the power steering from flare to o ring. Not sure on the best years.

dwcsr · 11-25-2007, 10:22 PM

Take a look at this it will give you the part numbers and where to get the fittings and hoses.

http://www.thehollisterroadcompany.com/hydroboost.html

Srubydo1986 · 11-26-2007, 02:01 AM

my old 83 one tone had hydrolic helped breaks. one were the power stearing also did breaks also had the hydrolic clutch it but so did my 86.

89 crew · 11-26-2007, 02:18 AM

I used to have a 79 1 ton with the brakes, and I currently have a 77, 89, and 04 1 ton crew cabs with the hydroboost. The 04 is 4 wheel disk brakes but you don't want to use the booster from it. Gm made the relief valve hole too big, and the spring weak, so it blows off the pressure too easy. Strange enough none of my standard tranny trucks have had the hyd clutch except the 60 1 ton.

sick69 · 11-26-2007, 03:13 AM

I'm using the hydro boost out of an 84 1ton moving van that has the flare fittings. I believe that a proportioning valve is still required for 4 wheel disks though. The hydro sytem was given to me so I haven't done alot of research on it yet. The fluid pressure just replaces the vacuum pressure so I don't see why a proportioning valve wouldn't be needed.

Frank

duallyjams · 11-26-2007, 11:37 AM

I just went by the local bone yard and I found a diesel blazer that still had the hydroboast brake on it but the pump was gone. Just shake some bushes and you can find what you need.

Pyrotechnic · 11-26-2007, 06:08 PM

Wasn't it 85 when they started using hydraulic clutches and slave cylinders ? I'm just shooting a number here, I don't know the exact year.

beaterC10 · 11-26-2007, 06:21 PM

Quote:

Originally Posted by Pyrotechnic

Wasn't it 85 when they started using hydraulic clutches and slave cylinders ? I'm just shooting a number here, I don't know the exact year.

Yes

cobinder · 11-27-2007, 10:25 AM

Because I have 4 disc's can I change to different master cylinders? Say I have a hydroboost from a disc/drum donor, can I buy a disc/disc mc that fits the booster and stop happily ever after?

Does the flare fittings also apply to the steering box or just the pump?

And DWCSR thanks for the link great info.

11-25-2007, 09:22 PM	#1
cobinder Everything is work in progress Join Date: Apr 2006 Location: Denver Colorado Posts: 326	Hydroboost & Hyd clutch what years?? I've converted my 80 K20 to a 5 speed (NV4500) and rear discs. I'm wanting to install hydroboost and hyd clutch. But I don't know what GM years would be compatible for a 4 disc brake system and the NV4500 with a drivers side external slave cylinder. Any help would be fantastic. __________________ Good luck with your truck! How much?! It's just an old truck part!! 49 International on a 80 GMC 3/4ton 4x4 chassis 48 International KB-5 2 ton dump bed 04 Honda CRF "500" 09 Honda CRF450 fuel injected rocket 03 Suzuki hayabusa carbonfiber wheeled monster. 02 Ford diesel stretch van (toy hauler) 01 38' Monaco diesel pusher motorhome

11-25-2007, 09:58 PM	#2
duallyjams Registered User Join Date: May 2007 Location: Deale Md Posts: 4,663	Re: Hydroboost & Hyd clutch what years?? Late 80s trucks had hydraulic clutches, for the hydro boost brakes any one ton or diesel truck. you just to pay close attention because GM changed the fitting on the power steering from flare to o ring. Not sure on the best years. __________________ James 63 GMC V6 4speed carryall 65 chevy swb bbw V8 auto 68 K20 327/4 speed, buddy buckets 2002 GMC CC Dually Duramax 64 GMC lwb 3/4 V6 4speed SOLD 66 GMC swb bbw buddy buckets SOLD IG duallyjams The only thing that stays the same is constant change!

11-25-2007, 10:22 PM	#3
dwcsr Hollister Road Co. Join Date: Apr 2005 Location: Houston Posts: 6,131	Re: Hydroboost & Hyd clutch what years?? Take a look at this it will give you the part numbers and where to get the fittings and hoses. http://www.thehollisterroadcompany.com/hydroboost.html

11-26-2007, 02:01 AM	#4
Srubydo1986 The Crazy Machanic Join Date: Jan 2007 Location: Nokesville Va Posts: 1,437	Re: Hydroboost & Hyd clutch what years?? my old 83 one tone had hydrolic helped breaks. one were the power stearing also did breaks also had the hydrolic clutch it but so did my 86. __________________ 1986 Sliverado longbed 400 small block mean as hell, 700r4 trans (5 speed coming one day) 1970 chevelle 2dr sedan Latest update June 24 2007. *1957 4 door stationwagon - pink all original needing a good restore (body great, floors bad) newest additions 1965 shortbed fleet great granddads. Been told im nuts to bring it back from the dead (still going to happen) plans-all stock with a turbo 292 inline 3 speed column shift. and thats it big block 427 and 5 speed trans and ford 9 inch theyhave no home yet thinking what to put them in and a 79 c60 trash truck um no idea i have one

11-26-2007, 02:18 AM	#5
89 crew Registered User Join Date: Mar 2006 Location: Kansas Posts: 865	Re: Hydroboost & Hyd clutch what years?? I used to have a 79 1 ton with the brakes, and I currently have a 77, 89, and 04 1 ton crew cabs with the hydroboost. The 04 is 4 wheel disk brakes but you don't want to use the booster from it. Gm made the relief valve hole too big, and the spring weak, so it blows off the pressure too easy. Strange enough none of my standard tranny trucks have had the hyd clutch except the 60 1 ton.

11-26-2007, 03:13 AM	#6
sick69 Registered User Join Date: Sep 2006 Location: colorado springs colorado Posts: 737	Re: Hydroboost & Hyd clutch what years?? I'm using the hydro boost out of an 84 1ton moving van that has the flare fittings. I believe that a proportioning valve is still required for 4 wheel disks though. The hydro sytem was given to me so I haven't done alot of research on it yet. The fluid pressure just replaces the vacuum pressure so I don't see why a proportioning valve wouldn't be needed. Frank __________________ 70 chevy lwb c10 454/th400 and a 9" rearend suicide doors, marker light fuel fill, 4" cowl , mini tub

11-26-2007, 11:37 AM	#7
duallyjams Registered User Join Date: May 2007 Location: Deale Md Posts: 4,663	Re: Hydroboost & Hyd clutch what years?? I just went by the local bone yard and I found a diesel blazer that still had the hydroboast brake on it but the pump was gone. Just shake some bushes and you can find what you need. __________________ James 63 GMC V6 4speed carryall 65 chevy swb bbw V8 auto 68 K20 327/4 speed, buddy buckets 2002 GMC CC Dually Duramax 64 GMC lwb 3/4 V6 4speed SOLD 66 GMC swb bbw buddy buckets SOLD IG duallyjams The only thing that stays the same is constant change!

11-26-2007, 06:08 PM	#8
Pyrotechnic Registered User Join Date: Feb 2007 Location: Austin, TX Posts: 3,930	Re: Hydroboost & Hyd clutch what years?? Wasn't it 85 when they started using hydraulic clutches and slave cylinders ? I'm just shooting a number here, I don't know the exact year.

11-27-2007, 10:25 AM	#10
cobinder Everything is work in progress Join Date: Apr 2006 Location: Denver Colorado Posts: 326	Re: Hydroboost & Hyd clutch what years?? Because I have 4 disc's can I change to different master cylinders? Say I have a hydroboost from a disc/drum donor, can I buy a disc/disc mc that fits the booster and stop happily ever after? Does the flare fittings also apply to the steering box or just the pump? And DWCSR thanks for the link great info. __________________ Good luck with your truck! How much?! It's just an old truck part!! 49 International on a 80 GMC 3/4ton 4x4 chassis 48 International KB-5 2 ton dump bed 04 Honda CRF "500" 09 Honda CRF450 fuel injected rocket 03 Suzuki hayabusa carbonfiber wheeled monster. 02 Ford diesel stretch van (toy hauler) 01 38' Monaco diesel pusher motorhome Last edited by cobinder; 11-27-2007 at 10:26 AM.



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