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71 Cuda Front Drum Brake Question? #1337339 11/18/12 07:02 PM 11/18/12 07:02 PM
Joined: Jan 2003 Posts: 2,179 Walton, Indiana TimS OP top fuel
TimS OP top fuel Joined: Jan 2003 Posts: 2,179 Walton, Indiana	I've been working on a nagging issue I've had with my 71 Cuda for quite a while. When the brakes are applied hard/quickly I get a pull to the left. I've replaced all springs and had the wheel cyclinder apart. I didn't replace because the cylinder appears to work just fine. The master cyclnder is fairly new but I don't see that being an issue anyhow. I'm beginning to wonder about the proportioning valve. In all my years I've never had an issue with that or ever replaced one. Any ideas/suggestions? Thanks! 1968 Barracuda Fastback 318-2BBL 904 2.76 Frost Blue Survivor 1970 Roadrunner 440+6 BBL 727 AT 4.10 SG Dana Blue Fire Metallic 1971 Cuda 340-4 BBL 4spd 3.91 SG Curious Yellow 1972 Barracuda 318-2 BBL 904 AT 3.23 1 Legger Tor Red/White Vinyl Top 2007 Dodge Ram 1500 5.7 Hemi AT Patriot Blue 2011 Dodge Challenger RT 5.7 Hemi 6spd 392 SG Triple Black 2014 Dodge Charger RT Max AWD 5.7 Hemi AT 305 Billet Silver

Re: 71 Cuda Front Drum Brake Question? [Re: TimS] #1337340 11/18/12 07:43 PM 11/18/12 07:43 PM
Joined: May 2005 Posts: 583 NJ R rth mopar
rth mopar R Joined: May 2005 Posts: 583 NJ	First make sure brakes adjusted evenly,rears also. Check tire pressure. Wheel bearings adjusted corectly? Next check front end components for wear and play. Tie rods,idler arm, u&l bushings, u&l ball joints and of course strut bar bushings. If all that seems good, make certain strut bar nuts are tight.

Re: 71 Cuda Front Drum Brake Question? [Re: rth] #1337341 11/18/12 07:58 PM 11/18/12 07:58 PM
Joined: Nov 2004 Posts: 7,274 s.w.fl B bonefish master
bonefish master B Joined: Nov 2004 Posts: 7,274 s.w.fl	what ever way its pulling,loosen that side up 1 click at atime and see if that fixes it.i had a 71 and it drove me nuts,i could get it perfect for a while then it would start pullin again.It,s got disc on the front now,no more pullin.

Re: 71 Cuda Front Drum Brake Question? [Re: bonefish] #1337342 11/18/12 08:56 PM 11/18/12 08:56 PM
Joined: Jan 2003 Posts: 2,179 Walton, Indiana TimS OP top fuel
TimS OP top fuel Joined: Jan 2003 Posts: 2,179 Walton, Indiana	Quote: what ever way its pulling,loosen that side up 1 click at atime and see if that fixes it.i had a 71 and it drove me nuts,i could get it perfect for a while then it would start pullin again.It,s got disc on the front now,no more pullin. It pulls left and if I take the self adjuster off and loosen the brakes it works but with the adjuster cable hooked up and the brakes adjusted correctly, it pulls left. I have two other cars with the same style manual drums, my 72 Barracuda with 10's works great along with my 68 Bee with 11's. I've redone those without any issues. These Cuda 11's should be the same. The front end components are good. It's definately a brake system issue. They also work pretty well if you push once then let off and hit hard. They go straight then. It's more of a panic stop when they pull allot. 1968 Barracuda Fastback 318-2BBL 904 2.76 Frost Blue Survivor 1970 Roadrunner 440+6 BBL 727 AT 4.10 SG Dana Blue Fire Metallic 1971 Cuda 340-4 BBL 4spd 3.91 SG Curious Yellow 1972 Barracuda 318-2 BBL 904 AT 3.23 1 Legger Tor Red/White Vinyl Top 2007 Dodge Ram 1500 5.7 Hemi AT Patriot Blue 2011 Dodge Challenger RT 5.7 Hemi 6spd 392 SG Triple Black 2014 Dodge Charger RT Max AWD 5.7 Hemi AT 305 Billet Silver

Re: 71 Cuda Front Drum Brake Question? [Re: TimS] #1337343 11/18/12 11:57 PM 11/18/12 11:57 PM
Joined: Nov 2003 Posts: 36,040 Lincoln Nebraska R RapidRobert Circle Track
RapidRobert Circle Track R Joined: Nov 2003 Posts: 36,040 Lincoln Nebraska	Quote: It pulls left the right side ain't doing it's job & very likely the RF rather than the RR. I would give the RF a good visual: shoe/drum clearance, smooth contact pads (6), partly collapsed hose, linkage issue, wheel cyl issue live every 24 hour block of time like it's your last day on earth

Re: 71 Cuda Front Drum Brake Question [Re: RapidRobert] #1337344 11/19/12 11:12 AM 11/19/12 11:12 AM
Joined: Jan 2003 Posts: 2,179 Walton, Indiana TimS OP top fuel
TimS OP top fuel Joined: Jan 2003 Posts: 2,179 Walton, Indiana	Quote: Quote: It pulls left the right side ain't doing it's job & very likely the RF rather than the RR. I would give the RF a good visual: shoe/drum clearance, smooth contact pads (6), partly collapsed hose, linkage issue, wheel cyl issue That sounds like a good idea. I've looked at that side before but plan to hit it again. I know the wheel cylinder is good but maybe something is impeding fluid flow. If I don't find anything i plan to check out the proportioning valve. Finding no issues with the left as far as shoe return, the right must not be as responsive brake to drum contact as the left. 1968 Barracuda Fastback 318-2BBL 904 2.76 Frost Blue Survivor 1970 Roadrunner 440+6 BBL 727 AT 4.10 SG Dana Blue Fire Metallic 1971 Cuda 340-4 BBL 4spd 3.91 SG Curious Yellow 1972 Barracuda 318-2 BBL 904 AT 3.23 1 Legger Tor Red/White Vinyl Top 2007 Dodge Ram 1500 5.7 Hemi AT Patriot Blue 2011 Dodge Challenger RT 5.7 Hemi 6spd 392 SG Triple Black 2014 Dodge Charger RT Max AWD 5.7 Hemi AT 305 Billet Silver

Re: 71 Cuda Front Drum Brake Question [Re: TimS] #1337345 11/19/12 11:35 AM 11/19/12 11:35 AM
Joined: Nov 2003 Posts: 36,040 Lincoln Nebraska R RapidRobert Circle Track
RapidRobert Circle Track R Joined: Nov 2003 Posts: 36,040 Lincoln Nebraska	I'd jack the front wheels off of the ground & adj each side to where there's a slight "tick" of contact during 1 point in the tires' revolution as you hand spin it forward. It may take several trips down the road/several adjustments to get em dead even & the shoes need to contact the drum at pretty much the same time on each side & 1 side slightly looser will give your symptoms. Holler how things turn out live every 24 hour block of time like it's your last day on earth

Re: 71 Cuda Front Drum Brake Question [Re: RapidRobert] #1337346 11/19/12 06:34 PM 11/19/12 06:34 PM
Joined: Jan 2003 Posts: 2,179 Walton, Indiana TimS OP top fuel
TimS OP top fuel Joined: Jan 2003 Posts: 2,179 Walton, Indiana	Quote: I'd jack the front wheels off of the ground & adj each side to where there's a slight "tick" of contact during 1 point in the tires' revolution as you hand spin it forward. It may take several trips down the road/several adjustments to get em dead even & the shoes need to contact the drum at pretty much the same time on each side & 1 side slightly looser will give your symptoms. Holler how things turn out I got em even but it still panic pulls to the left. I've taken the shoes off again and checked to make sure the wheel cylinders are nice and free. I actually manually adjusted the lefts so they are not even close to the drum and it will still pull left once contact is made. I'm still thinking proportioning valve. Lines are not kinked and like I said earlier can't see how the master cylinder would be at fault though it is fairly new. Not loosing any fluid anywhere to make the rights sluggish and give under pressure. Pedal is nice and solid. 1968 Barracuda Fastback 318-2BBL 904 2.76 Frost Blue Survivor 1970 Roadrunner 440+6 BBL 727 AT 4.10 SG Dana Blue Fire Metallic 1971 Cuda 340-4 BBL 4spd 3.91 SG Curious Yellow 1972 Barracuda 318-2 BBL 904 AT 3.23 1 Legger Tor Red/White Vinyl Top 2007 Dodge Ram 1500 5.7 Hemi AT Patriot Blue 2011 Dodge Challenger RT 5.7 Hemi 6spd 392 SG Triple Black 2014 Dodge Charger RT Max AWD 5.7 Hemi AT 305 Billet Silver

Re: 71 Cuda Front Drum Brake Question [Re: TimS] #1337347 11/19/12 08:34 PM 11/19/12 08:34 PM
Joined: Nov 2003 Posts: 36,040 Lincoln Nebraska R RapidRobert Circle Track
RapidRobert Circle Track R Joined: Nov 2003 Posts: 36,040 Lincoln Nebraska	The single line to the fronts T's downstream from the prop valve/splitter so each side recieves the same psi even if the prop valve is malfunctioning though there could be a partial blockage on either the LF or RF usually in the hose. This is a tough one. Holler how it goes. live every 24 hour block of time like it's your last day on earth

Re: 71 Cuda Front Drum Brake Question [Re: RapidRobert] #1337348 11/19/12 08:42 PM 11/19/12 08:42 PM
Joined: Mar 2003 Posts: 5,193 NEW JERSEY AARCONV master
AARCONV master Joined: Mar 2003 Posts: 5,193 NEW JERSEY	look for a out of round drum

Re: 71 Cuda Front Drum Brake Question [Re: RapidRobert] #1337349 11/20/12 08:44 AM 11/20/12 08:44 AM
Joined: Jan 2003 Posts: 2,179 Walton, Indiana TimS OP top fuel
TimS OP top fuel Joined: Jan 2003 Posts: 2,179 Walton, Indiana	Quote: The single line to the fronts T's downstream from the prop valve/splitter so each side recieves the same psi even if the prop valve is malfunctioning though there could be a partial blockage on either the LF or RF usually in the hose. This is a tough one. Holler how it goes. Both the front lines go directly to the proportioning valve on my car. Should there be something else in between somewhere? 1968 Barracuda Fastback 318-2BBL 904 2.76 Frost Blue Survivor 1970 Roadrunner 440+6 BBL 727 AT 4.10 SG Dana Blue Fire Metallic 1971 Cuda 340-4 BBL 4spd 3.91 SG Curious Yellow 1972 Barracuda 318-2 BBL 904 AT 3.23 1 Legger Tor Red/White Vinyl Top 2007 Dodge Ram 1500 5.7 Hemi AT Patriot Blue 2011 Dodge Challenger RT 5.7 Hemi 6spd 392 SG Triple Black 2014 Dodge Charger RT Max AWD 5.7 Hemi AT 305 Billet Silver

Re: 71 Cuda Front Drum Brake Question [Re: TimS] #1337350 11/20/12 10:26 AM 11/20/12 10:26 AM
Joined: Nov 2003 Posts: 36,040 Lincoln Nebraska R RapidRobert Circle Track
RapidRobert Circle Track R Joined: Nov 2003 Posts: 36,040 Lincoln Nebraska	Quote: Both the front lines go directly to the proportioning valve on my car. Should there be something else in between somewhere? No, my mistake on that. EDIT yes it might be the prop valve. That might be a plan to take it off & blow it out or if it'll come apart to a certain extent then blow it out. Last edited by RapidRobert; 11/20/12 11:01 AM.

Re: 71 Cuda Front Drum Brake Question [Re: RapidRobert] #1337351 11/20/12 12:10 PM 11/20/12 12:10 PM
Joined: Feb 2003 Posts: 1,228 Maple Valley, WA 70mopes pro stock
70mopes pro stock Joined: Feb 2003 Posts: 1,228 Maple Valley, WA	Replace both front brake hoses... regardless of age or apparent external condition. That fixed the same problem I had on a '70 'cuda with 11" manual drum brakes.

Re: 71 Cuda Front Drum Brake Question [Re: 70mopes] #1337352 11/20/12 02:16 PM 11/20/12 02:16 PM
Joined: Jan 2003 Posts: 2,179 Walton, Indiana TimS OP top fuel
TimS OP top fuel Joined: Jan 2003 Posts: 2,179 Walton, Indiana	I think both are good suggestions. I plan to remove the lines from the front one side at a time and work my way back to the proportioning valve then master cylinder. There has to be some blockage somewhere in the lines or the valve. 1968 Barracuda Fastback 318-2BBL 904 2.76 Frost Blue Survivor 1970 Roadrunner 440+6 BBL 727 AT 4.10 SG Dana Blue Fire Metallic 1971 Cuda 340-4 BBL 4spd 3.91 SG Curious Yellow 1972 Barracuda 318-2 BBL 904 AT 3.23 1 Legger Tor Red/White Vinyl Top 2007 Dodge Ram 1500 5.7 Hemi AT Patriot Blue 2011 Dodge Challenger RT 5.7 Hemi 6spd 392 SG Triple Black 2014 Dodge Charger RT Max AWD 5.7 Hemi AT 305 Billet Silver

Re: 71 Cuda Front Drum Brake Question [Re: 70mopes] #1337353 12/03/12 11:58 AM 12/03/12 11:58 AM
Joined: Jan 2003 Posts: 2,179 Walton, Indiana TimS OP top fuel
TimS OP top fuel Joined: Jan 2003 Posts: 2,179 Walton, Indiana	Quote: Replace both front brake hoses... regardless of age or apparent external condition. That fixed the same problem I had on a '70 'cuda with 11" manual drum brakes. Bingo! That fixed my issue with this 71 Cuda. The RH brake hose is partially plugged with something, or may even be coming apart internally. They are the originals so I replaced both. 1968 Barracuda Fastback 318-2BBL 904 2.76 Frost Blue Survivor 1970 Roadrunner 440+6 BBL 727 AT 4.10 SG Dana Blue Fire Metallic 1971 Cuda 340-4 BBL 4spd 3.91 SG Curious Yellow 1972 Barracuda 318-2 BBL 904 AT 3.23 1 Legger Tor Red/White Vinyl Top 2007 Dodge Ram 1500 5.7 Hemi AT Patriot Blue 2011 Dodge Challenger RT 5.7 Hemi 6spd 392 SG Triple Black 2014 Dodge Charger RT Max AWD 5.7 Hemi AT 305 Billet Silver

Re: 71 Cuda Front Drum Brake Question [Re: AARCONV] #1337354 12/04/12 11:11 PM 12/04/12 11:11 PM
Joined: Jan 2008 Posts: 220 Forth Worth, Texas, USA TheRamMan enthusiast
TheRamMan enthusiast Joined: Jan 2008 Posts: 220 Forth Worth, Texas, USA	the gent above seems very hot....... check the DRUMS very well TRM

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