impala rear disc??? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Ram-Man · 02-18-2007, 06:46 PM

I know this topic has been around awhile but I got my brackets and finally got to the install and here is an issue that I ran into. I tried this on 2 rearends with the same problem. One is a 1971 12 bolt and one is a 1972 12 bolt. I also slid out the axles on and old rear end to try different axles but with the same results. I finally took the brackets off because I dont see how they will work. I know some hjave installed these calipers and are using them when I put the impala rotors on they run into the bracket before they sit flush on the axle face. It's obvious after looking at this all weekend the problem is in the axles not far enough out from the 4 hole flange The one axle I tried this on is a complete factory setup with no modifications done to it. Any thoughts??? Or does anyone have the measurement like in the picture to see if that is the problem. Thanks

Ram-Man · 02-18-2007, 06:47 PM

One more to show the axles in flush.

PanelDeland · 02-18-2007, 06:55 PM

Does the bracket have an open side.I thought I saw one of these conversions and the bracket was inside of the flange.With my memory I could be completely wrong,especially since I have never done one.That seems like it would allow the rotor to fit in more and maybe fit the caliper.

Ram-Man · 02-18-2007, 07:02 PM

Quote:

Originally Posted by PanelDeland

Does the bracket have an open side.I thought I saw one of these conversions and the bracket was inside of the flange.With my memory I could be completely wrong,especially since I have never done one.That seems like it would allow the rotor to fit in more and maybe fit the caliper.

These brackets didn't have an open side but they do now because I cut them to try them on the other side of the flange but that didn't work either.

Inthuwind · 02-18-2007, 07:23 PM

I took my wheel off and snapped these~Hope this helps.

Ram-Man · 02-18-2007, 07:29 PM

WOW inthuwind thanks for doing that. We have the same measurements from the flange to the back of the axle but I noticed your brackets are thinner I'll go measure my rotors.

Inthuwind · 02-18-2007, 07:36 PM

Yeah, my plates are 3/16" I believe.

Ram-Man · 02-18-2007, 08:37 PM

Here are pics of the rotor on. Now I can see we have the same set up but 3/8" plates are too thick to clear on this.

glock35ipsc · 02-18-2007, 08:41 PM

A couple of things jumps out at me. Is the radiused corners hitting?....in other words, if I tighten up that corner where the OEM bracket bolts on, would it clear? And is the bracket hitting that small ring on the inner part of the rotor?

My thoughts are if some material could be milled off near the rotor, or cut the radius down where it touches the rotor. Whatever need to be done, whether it is reworking these brackets or making thinner ones, rest assured I will do whatever needs to be done to make it right!!!!!!

Ram-Man · 02-18-2007, 08:50 PM

This is inthuwinds pic This spot here is a clearence issue with the size of the bolt heads. But the main problem is the plate thickness won't clear. I wonder if 383 stroker pic may have had a 67-70 housing which is narrower and used the 71-72 5 lug axle's. This would work out with this thick of a plate to get the clearence you need with the longer axle's and narrower housing.

glock35ipsc · 02-18-2007, 08:54 PM

Inthuwind - could you please verify what the thickness of your plate is, and did you use metric or SAE bolts to mount the OEM bracket to yours and what size?

I'm thinking a socket head cap screw run from the outside towards the inside might help the clearance issue......

Thanks!

Ram-Man · 02-18-2007, 09:13 PM

Quote:

Originally Posted by glock35ipsc

Inthuwind - could you please verify what the thickness of your plate is, and did you use metric or SAE bolts to mount the OEM bracket to yours and what size?

I'm thinking a socket head cap screw run from the outside towards the inside might help the clearance issue......

Thanks!

Allen-head would be the way to go, inthuwind said his plate were 3/16" thick.

Inthuwind · 02-18-2007, 09:43 PM

Quote:

Originally Posted by glock35ipsc

Inthuwind - could you please verify what the thickness of your plate is, and did you use metric or SAE bolts to mount the OEM bracket to yours and what size?

I'm thinking a socket head cap screw run from the outside towards the inside might help the clearance issue......

Thanks!

Those would be great to use. Mine are SAE 3/8" bolts, and I had to turn the heads on the bolt to clear inside the rotor. Those round ones are ideal. I was thinking maybe your plate was thicker.

Ram-Man · 02-18-2007, 09:59 PM

I think we have this figured out. I can see that yours are also tight inthuwind. But with the thinner plate it would clear. This is why we call it custom

Now I hope glock can have some thinner ones cut out. Thanks for all the help inthuwind.

glock35ipsc · 02-18-2007, 10:02 PM

If Inthuwind can confirm that his are 3/16", I will get them made ASAP!!!!

Inthuwind · 02-19-2007, 09:06 AM

My plates are 3/16". What thickness are yours Glock?

glock35ipsc · 02-19-2007, 10:10 AM

3/8". Simple failure on my part to double check fitment before sending them all out. I went off of this pic:

Inthuwind · 02-19-2007, 10:15 AM

Have you sent alot out? Hopefully everyone will understand and not cuss at you~LOL. You've been a stand up guy in my book, hell you've been here on the board alot longer than I. Hope you get this worked out. Hey, that's not yours in the pic?

glock35ipsc · 02-19-2007, 10:59 AM

Thank for the good words!!! I'm not out to hose anyone, just trying to help the shade tree guys like myself get stuff no one else has or makes. I have sent out quite a few sets, but that don't matter. I'll replace every one of them to make it right!

No, that pic is 383strokers. I used that pic to "guess" the thickness. My bad!!

Inthuwind · 02-19-2007, 06:39 PM

Quote:

Originally Posted by glock35ipsc

No, that pic is 383strokers. I used that pic to "guess" the thickness. My bad!!

AAAhhh that's right, that was his pic!! Thought it looked familiar. That's where I got my idea from LOL. Good luck Glock and Ram Man!!!

Ram-Man · 02-19-2007, 06:42 PM

I really think what 383 stroker had was the 67-69 rear end housing and put in the 5 lug axles which are longer than what came with the 67-69 and some 70's. If you had that housing 67-69 you would be changing your axles to use the impala rotor. So the 3/8" thick plate would work in that case.

Inthuwind · 02-19-2007, 06:49 PM

The axles were shorter weren't they?

Ram-Man · 02-19-2007, 07:18 PM

That would be the ideal setup to get more clearence from the rotor to the bracket.

glock35ipsc · 02-19-2007, 10:33 PM

Quote:

Originally Posted by Inthuwind

The axles were shorter weren't they?

It appears that using the earlier (shorter) housing with the 71 and up axles (longer) would yeild enough clearance for the 3/8" plates.

action · 02-20-2007, 12:47 AM

I also bought the brackets from Glock ( Nice pieces) Anyway it will be a while untill I use them but it looks like just a little clearnceing (SP?) will do the trick.
I hope it all works out.
Jack

02-18-2007, 06:46 PM	#1
Ram-Man Senior Member Join Date: Aug 2006 Location: Minnesota Posts: 943	impala rear disc??? I know this topic has been around awhile but I got my brackets and finally got to the install and here is an issue that I ran into. I tried this on 2 rearends with the same problem. One is a 1971 12 bolt and one is a 1972 12 bolt. I also slid out the axles on and old rear end to try different axles but with the same results. I finally took the brackets off because I dont see how they will work. I know some hjave installed these calipers and are using them when I put the impala rotors on they run into the bracket before they sit flush on the axle face. It's obvious after looking at this all weekend the problem is in the axles not far enough out from the 4 hole flange The one axle I tried this on is a complete factory setup with no modifications done to it. Any thoughts??? Or does anyone have the measurement like in the picture to see if that is the problem. Thanks Attached Images

02-18-2007, 06:47 PM	#2
Ram-Man Senior Member Join Date: Aug 2006 Location: Minnesota Posts: 943	Re: impala rear disc??? One more to show the axles in flush. Attached Images

02-18-2007, 06:55 PM	#3
PanelDeland I am a Referee of life. Join Date: Jun 2000 Location: Greensboro N.C. Posts: 13,993	Re: impala rear disc??? Does the bracket have an open side.I thought I saw one of these conversions and the bracket was inside of the flange.With my memory I could be completely wrong,especially since I have never done one.That seems like it would allow the rotor to fit in more and maybe fit the caliper. __________________ The 47-present Chevrolet and GMC Truck Message Board Network,it's owners,moderators,members,and associates of any type should not be held responsible for my opinion. You can't fix stupid,not even with duct tape. "My appearance is due to the fact that "GOD" does punish you for having too much fun!" Barrett-Jackson has perfected alchemy,they make rust into gold! "You can lead a horse to water but you can't saddle a duck" "Cleverly disguised as a 'Responsible Adult' "Sometimes your Knight in shining armor is just a retard in tinfoil"

02-18-2007, 07:23 PM	#5
Inthuwind Straight jacket required Join Date: Oct 2003 Location: OKC, OK Posts: 882	Re: impala rear disc??? I took my wheel off and snapped these~Hope this helps. Attached Images __________________ 1968 C10 Short Stepper 350/350 A/C P/S P/B Front disc 3/5 static/ 12bolt rear 3:73 1979 Pontiac Trans Am 10th Anniversary/455/4spd 2011 H-D Street Glide - CAMMED n lowered Dad always said,"Son, if you can't be good...be good at it."

02-18-2007, 07:29 PM	#6
Ram-Man Senior Member Join Date: Aug 2006 Location: Minnesota Posts: 943	Re: impala rear disc??? WOW inthuwind thanks for doing that. We have the same measurements from the flange to the back of the axle but I noticed your brackets are thinner I'll go measure my rotors.

02-18-2007, 07:36 PM	#7
Inthuwind Straight jacket required Join Date: Oct 2003 Location: OKC, OK Posts: 882	Re: impala rear disc??? Yeah, my plates are 3/16" I believe. __________________ 1968 C10 Short Stepper 350/350 A/C P/S P/B Front disc 3/5 static/ 12bolt rear 3:73 1979 Pontiac Trans Am 10th Anniversary/455/4spd 2011 H-D Street Glide - CAMMED n lowered Dad always said,"Son, if you can't be good...be good at it."

02-18-2007, 08:37 PM	#8
Ram-Man Senior Member Join Date: Aug 2006 Location: Minnesota Posts: 943	Re: impala rear disc??? Here are pics of the rotor on. Now I can see we have the same set up but 3/8" plates are too thick to clear on this. Attached Images

02-18-2007, 08:41 PM	#9
glock35ipsc Next project: 1970 K10 Join Date: Feb 2004 Location: Fort Collins, Colo 80524 Posts: 6,685	Re: impala rear disc??? A couple of things jumps out at me. Is the radiused corners hitting?....in other words, if I tighten up that corner where the OEM bracket bolts on, would it clear? And is the bracket hitting that small ring on the inner part of the rotor? My thoughts are if some material could be milled off near the rotor, or cut the radius down where it touches the rotor. Whatever need to be done, whether it is reworking these brackets or making thinner ones, rest assured I will do whatever needs to be done to make it right!!!!!! __________________ *Bob* 1970 Chevy K10 LWB "Goldie" 350/TH350 *next project!!* 1981 Chevy C10 LWB 355/TH350 - My son's truck LS SWAP FORUM! Tons of LS swap info here! PLEASE CLICK HERE TO SUPPORT THE GREATEST BOARD ON THE NET! CLICK HERE FOR THE FAQ INDEX by KRUE

02-18-2007, 08:50 PM	#10
Ram-Man Senior Member Join Date: Aug 2006 Location: Minnesota Posts: 943	Re: impala rear disc??? This is inthuwinds pic This spot here is a clearence issue with the size of the bolt heads. But the main problem is the plate thickness won't clear. I wonder if 383 stroker pic may have had a 67-70 housing which is narrower and used the 71-72 5 lug axle's. This would work out with this thick of a plate to get the clearence you need with the longer axle's and narrower housing. Attached Images

02-18-2007, 08:54 PM	#11
glock35ipsc Next project: 1970 K10 Join Date: Feb 2004 Location: Fort Collins, Colo 80524 Posts: 6,685	Re: impala rear disc??? Inthuwind - could you please verify what the thickness of your plate is, and did you use metric or SAE bolts to mount the OEM bracket to yours and what size? I'm thinking a socket head cap screw run from the outside towards the inside might help the clearance issue...... Thanks! __________________ *Bob* 1970 Chevy K10 LWB "Goldie" 350/TH350 *next project!!* 1981 Chevy C10 LWB 355/TH350 - My son's truck LS SWAP FORUM! Tons of LS swap info here! PLEASE CLICK HERE TO SUPPORT THE GREATEST BOARD ON THE NET! CLICK HERE FOR THE FAQ INDEX by KRUE Last edited by glock35ipsc; 02-18-2007 at 09:00 PM.

02-18-2007, 09:59 PM	#14
Ram-Man Senior Member Join Date: Aug 2006 Location: Minnesota Posts: 943	Re: impala rear disc??? I think we have this figured out. I can see that yours are also tight inthuwind. But with the thinner plate it would clear. This is why we call it custom Now I hope glock can have some thinner ones cut out. Thanks for all the help inthuwind. Last edited by Ram-Man; 02-18-2007 at 10:00 PM.

02-18-2007, 10:02 PM	#15
glock35ipsc Next project: 1970 K10 Join Date: Feb 2004 Location: Fort Collins, Colo 80524 Posts: 6,685	Re: impala rear disc??? If Inthuwind can confirm that his are 3/16", I will get them made ASAP!!!! __________________ *Bob* 1970 Chevy K10 LWB "Goldie" 350/TH350 *next project!!* 1981 Chevy C10 LWB 355/TH350 - My son's truck LS SWAP FORUM! Tons of LS swap info here! PLEASE CLICK HERE TO SUPPORT THE GREATEST BOARD ON THE NET! CLICK HERE FOR THE FAQ INDEX by KRUE

02-19-2007, 09:06 AM	#16
Inthuwind Straight jacket required Join Date: Oct 2003 Location: OKC, OK Posts: 882	Re: impala rear disc??? My plates are 3/16". What thickness are yours Glock? __________________ 1968 C10 Short Stepper 350/350 A/C P/S P/B Front disc 3/5 static/ 12bolt rear 3:73 1979 Pontiac Trans Am 10th Anniversary/455/4spd 2011 H-D Street Glide - CAMMED n lowered Dad always said,"Son, if you can't be good...be good at it."

02-19-2007, 10:10 AM	#17
glock35ipsc Next project: 1970 K10 Join Date: Feb 2004 Location: Fort Collins, Colo 80524 Posts: 6,685	Re: impala rear disc??? 3/8". Simple failure on my part to double check fitment before sending them all out. I went off of this pic: __________________ *Bob* 1970 Chevy K10 LWB "Goldie" 350/TH350 *next project!!* 1981 Chevy C10 LWB 355/TH350 - My son's truck LS SWAP FORUM! Tons of LS swap info here! PLEASE CLICK HERE TO SUPPORT THE GREATEST BOARD ON THE NET! CLICK HERE FOR THE FAQ INDEX by KRUE

02-19-2007, 10:15 AM	#18
Inthuwind Straight jacket required Join Date: Oct 2003 Location: OKC, OK Posts: 882	Re: impala rear disc??? Have you sent alot out? Hopefully everyone will understand and not cuss at you~LOL. You've been a stand up guy in my book, hell you've been here on the board alot longer than I. Hope you get this worked out. Hey, that's not yours in the pic? __________________ 1968 C10 Short Stepper 350/350 A/C P/S P/B Front disc 3/5 static/ 12bolt rear 3:73 1979 Pontiac Trans Am 10th Anniversary/455/4spd 2011 H-D Street Glide - CAMMED n lowered Dad always said,"Son, if you can't be good...be good at it."



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02-19-2007, 10:59 AM	#19
glock35ipsc Next project: 1970 K10 Join Date: Feb 2004 Location: Fort Collins, Colo 80524 Posts: 6,685	Re: impala rear disc??? Thank for the good words!!! I'm not out to hose anyone, just trying to help the shade tree guys like myself get stuff no one else has or makes. I have sent out quite a few sets, but that don't matter. I'll replace every one of them to make it right! No, that pic is 383strokers. I used that pic to "guess" the thickness. My bad!! __________________ *Bob* 1970 Chevy K10 LWB "Goldie" 350/TH350 *next project!!* 1981 Chevy C10 LWB 355/TH350 - My son's truck LS SWAP FORUM! Tons of LS swap info here! PLEASE CLICK HERE TO SUPPORT THE GREATEST BOARD ON THE NET! CLICK HERE FOR THE FAQ INDEX by KRUE

02-19-2007, 06:42 PM	#21
Ram-Man Senior Member Join Date: Aug 2006 Location: Minnesota Posts: 943	Re: impala rear disc??? I really think what 383 stroker had was the 67-69 rear end housing and put in the 5 lug axles which are longer than what came with the 67-69 and some 70's. If you had that housing 67-69 you would be changing your axles to use the impala rotor. So the 3/8" thick plate would work in that case.

02-19-2007, 06:49 PM	#22
Inthuwind Straight jacket required Join Date: Oct 2003 Location: OKC, OK Posts: 882	Re: impala rear disc??? The axles were shorter weren't they? __________________ 1968 C10 Short Stepper 350/350 A/C P/S P/B Front disc 3/5 static/ 12bolt rear 3:73 1979 Pontiac Trans Am 10th Anniversary/455/4spd 2011 H-D Street Glide - CAMMED n lowered Dad always said,"Son, if you can't be good...be good at it."

02-19-2007, 07:18 PM	#23
Ram-Man Senior Member Join Date: Aug 2006 Location: Minnesota Posts: 943	Re: impala rear disc??? That would be the ideal setup to get more clearence from the rotor to the bracket.

02-20-2007, 12:47 AM	#25
action Active Member Join Date: Dec 2005 Location: Valley Springs, Ca. Posts: 266	Re: impala rear disc??? I also bought the brackets from Glock ( Nice pieces) Anyway it will be a while untill I use them but it looks like just a little clearnceing (SP?) will do the trick. I hope it all works out. Jack __________________ 68 Chevy Long utility bed. Now swb/Bagged Soon to be 468 (Maybe 496) BB/Turbo 400

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