Parking Brakes jambs throttle - The 1947 - Present Chevrolet & GMC Truck Message Board Network

jdaley · 12-17-2009, 06:59 PM

I have just picked up a C20 1977.
The parking brake cannot be used because it holds the trottle pedal down. Everything looks straight, so does anybody know what the solution is, I thought shift the throttle mechanism sideways about 3 inches.

**N2TRUX** · 12-17-2009, 09:50 PM

Welcome to the forum jdaley. I am rather confused on your issue. I'm not sure how the parking brake could cause a problem with the throttle.

Can you post pics so we might be able to help?

flamingbig10 · 12-17-2009, 10:27 PM

right hand drive I assume

jdaley · 12-17-2009, 11:33 PM

RHD yes
If I push the brake pedal down it locks against the middle of the throttle pedal. Nothing looks bent or out of place, its bewilderin.
I thought of shifting the accelerator pedal 3inches closer to the main brake pedal.
But it seems strange!

wfomkivdrvr · 12-17-2009, 11:48 PM

why dont you adjust the rear brakes and then the park brake so that it doesn't travel so far down!

wfomkivdrvr · 12-17-2009, 11:49 PM

Oh yeah welcome

**N2TRUX** · 12-18-2009, 12:44 AM

Quote:

Originally Posted by flamingbig10

right hand drive I assume

Yeah, I saw his location after I posted. RHD crossed my mind, but I'm still perplexed as to why it's happening.

flamingbig10 · 12-18-2009, 01:12 AM

it took me a hour to figure it out

*Stitch* · 12-18-2009, 01:19 AM

I think that the whole assembly may be mounted wrong...that's my only guess without pictures...you're going to have to get up under there and see exactly what's going on up there...for some reason maybe you have a LHD accelerator pedal assembly and when it's mounted in a RHD configuration it puts it over too far...or you can just do as already stated and adjusted the parking brake so it doesn't go down as far and doesn't touch the gas pedal...

jdaley · 12-18-2009, 02:16 AM

Thanks for the welcome.
I will try the adjustment technique first.

jdaley · 05-03-2011, 06:46 AM

I finally fixed this problem.
I moved the throttle bracket left about 1 inch with new bolts and bent the throttle bar sideways the same amount and everything now works.
Its nice having a secondary brake taht works.

bb1979 · 05-03-2011, 08:55 AM

Yep it's a common problem with all pickups over here solution is exactly what you have done.

HzSandman · 05-03-2011, 09:02 AM

I had the exact same issue on my 1990 RHD C1500. It almost cost me a new pickup actually. A mate was reversing down the boat ramp so I could load my boat on the trailer. Not knowing that the park brake used to go right down to the throttle pedal he pushed it on whilst still in reverse. Jamming the throttle to the floor.....The water only came up to the back of the doors, luckily he quickly threw it into Neutral. One very very hairy moment.

Glad you got it sorted, its a less than average setup and I'm really suprised that they pass engineering like this.
Just picked up a C20 myself, what are your plans ?

jdaley · 05-03-2011, 06:18 PM

I intend to keep the 292, fit lpg, cut and polish the cab and leave it. I will fit air, silencing of cabin.
I extended the exhaust pipe 3M to get a quiter ride.
I race sidecars and the machine and all bits fits nicely on the deck.
I love the wide bench seat, I can get 4 across

You know, when I first asked about this matter, it seemed like I was the only person who had the problem.

bb1979 · 05-04-2011, 06:36 AM

If you have the seat re trimmed, add something like an extra 2" of padding on each side and you can legally change the seating capacity to 4 people after fitting a fourth belt, works well as long as you don't have four big blokes in there, works real well when out cruising with a mate and you pick up a couple of chicks

jdaley · 05-04-2011, 08:53 AM

good tip, thanks

12-17-2009, 06:59 PM	#1
jdaley Registered User Join Date: Dec 2009 Location: Melbourne, Australia Posts: 71	Parking Brakes jambs throttle I have just picked up a C20 1977. The parking brake cannot be used because it holds the trottle pedal down. Everything looks straight, so does anybody know what the solution is, I thought shift the throttle mechanism sideways about 3 inches.

12-17-2009, 09:50 PM	#2
N2TRUX Happy to be here Join Date: Mar 2000 Location: Cypress, TX Posts: 39,023	Re: Parking Brakes jambs throttle Welcome to the forum jdaley. I am rather confused on your issue. I'm not sure how the parking brake could cause a problem with the throttle. Can you post pics so we might be able to help? __________________ Follow me on Facebook and Instagram @N2trux.com Articles- "Jake" the 84 to 74 crewcab "Elwood" the77_Remix 85 GMC Sierra "Scarlett" "Refining Sierra"

12-17-2009, 10:27 PM	#3
flamingbig10 6.0 powered square Join Date: Feb 2008 Location: Mesquite texas Posts: 3,459	Re: Parking Brakes jambs throttle right hand drive I assume __________________ Aaron 1980 c-10 short bed lowered, cammed 6.0, 4l80e 3600 stall, smp tune, wilwoods, and flames best time so far best et 7.86 @87 on motor 7.57 90 on a 75 shot Build http://67-72chevytrucks.com/vboard/s...d.php?t=283326

12-17-2009, 11:33 PM	#4
jdaley Registered User Join Date: Dec 2009 Location: Melbourne, Australia Posts: 71	Re: Parking Brakes jambs throttle RHD yes If I push the brake pedal down it locks against the middle of the throttle pedal. Nothing looks bent or out of place, its bewilderin. I thought of shifting the accelerator pedal 3inches closer to the main brake pedal. But it seems strange!

12-17-2009, 11:48 PM	#5
wfomkivdrvr HORSEPOWER JUNKIE Join Date: Feb 2008 Location: Esparto,CA. Posts: 97	Re: Parking Brakes jambs throttle why dont you adjust the rear brakes and then the park brake so that it doesn't travel so far down! __________________ 67 C20 fleetside custom camper 69 El Camino 72 Camaro 52 Dodge b3b 108 pickup

12-17-2009, 11:49 PM	#6
wfomkivdrvr HORSEPOWER JUNKIE Join Date: Feb 2008 Location: Esparto,CA. Posts: 97	Re: Parking Brakes jambs throttle Oh yeah welcome __________________ 67 C20 fleetside custom camper 69 El Camino 72 Camaro 52 Dodge b3b 108 pickup

12-18-2009, 01:12 AM	#8
flamingbig10 6.0 powered square Join Date: Feb 2008 Location: Mesquite texas Posts: 3,459	Re: Parking Brakes jambs throttle it took me a hour to figure it out __________________ Aaron 1980 c-10 short bed lowered, cammed 6.0, 4l80e 3600 stall, smp tune, wilwoods, and flames best time so far best et 7.86 @87 on motor 7.57 90 on a 75 shot Build http://67-72chevytrucks.com/vboard/s...d.php?t=283326

12-18-2009, 01:19 AM	#9
Stitch Account Suspended Join Date: Jul 2008 Location: Where I come from, it's cornbread and chicken... Posts: 3,122	Re: Parking Brakes jambs throttle I think that the whole assembly may be mounted wrong...that's my only guess without pictures...you're going to have to get up under there and see exactly what's going on up there...for some reason maybe you have a LHD accelerator pedal assembly and when it's mounted in a RHD configuration it puts it over too far...or you can just do as already stated and adjusted the parking brake so it doesn't go down as far and doesn't touch the gas pedal...

12-18-2009, 02:16 AM	#10
jdaley Registered User Join Date: Dec 2009 Location: Melbourne, Australia Posts: 71	Re: Parking Brakes jambs throttle Thanks for the welcome. I will try the adjustment technique first. __________________ John Daley Melbourne, Australia 1946 Chev Ute 1977 Chev Tray Road racing sidecars

05-03-2011, 06:46 AM	#11
jdaley Registered User Join Date: Dec 2009 Location: Melbourne, Australia Posts: 71	Re: Parking Brakes jambs throttle I finally fixed this problem. I moved the throttle bracket left about 1 inch with new bolts and bent the throttle bar sideways the same amount and everything now works. Its nice having a secondary brake taht works. __________________ John Daley Melbourne, Australia 1946 Chev Ute 1977 Chev Tray Road racing sidecars

05-03-2011, 08:55 AM	#12
bb1979 Registered User Join Date: Apr 2007 Location: NSW, Australia Posts: 205	Re: Parking Brakes jambs throttle Yep it's a common problem with all pickups over here solution is exactly what you have done. __________________ 1979 C20 pickup 454 big block turbo 400, 4.56 gears

05-03-2011, 09:02 AM	#13
HzSandman Registered User Join Date: Mar 2011 Location: Geelong, Victoria Posts: 26	Re: Parking Brakes jambs throttle I had the exact same issue on my 1990 RHD C1500. It almost cost me a new pickup actually. A mate was reversing down the boat ramp so I could load my boat on the trailer. Not knowing that the park brake used to go right down to the throttle pedal he pushed it on whilst still in reverse. Jamming the throttle to the floor.....The water only came up to the back of the doors, luckily he quickly threw it into Neutral. One very very hairy moment. Glad you got it sorted, its a less than average setup and I'm really suprised that they pass engineering like this. Just picked up a C20 myself, what are your plans ?

05-03-2011, 06:18 PM	#14
jdaley Registered User Join Date: Dec 2009 Location: Melbourne, Australia Posts: 71	Re: Parking Brakes jambs throttle I intend to keep the 292, fit lpg, cut and polish the cab and leave it. I will fit air, silencing of cabin. I extended the exhaust pipe 3M to get a quiter ride. I race sidecars and the machine and all bits fits nicely on the deck. I love the wide bench seat, I can get 4 across You know, when I first asked about this matter, it seemed like I was the only person who had the problem. __________________ John Daley Melbourne, Australia 1946 Chev Ute 1977 Chev Tray Road racing sidecars Last edited by jdaley; 05-03-2011 at 06:23 PM.

05-04-2011, 06:36 AM	#15
bb1979 Registered User Join Date: Apr 2007 Location: NSW, Australia Posts: 205	Re: Parking Brakes jambs throttle If you have the seat re trimmed, add something like an extra 2" of padding on each side and you can legally change the seating capacity to 4 people after fitting a fourth belt, works well as long as you don't have four big blokes in there, works real well when out cruising with a mate and you pick up a couple of chicks __________________ 1979 C20 pickup 454 big block turbo 400, 4.56 gears

05-04-2011, 08:53 AM	#16
jdaley Registered User Join Date: Dec 2009 Location: Melbourne, Australia Posts: 71	Re: Parking Brakes jambs throttle good tip, thanks __________________ John Daley Melbourne, Australia 1946 Chev Ute 1977 Chev Tray Road racing sidecars



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