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Author
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Topic: rear end question
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adragon8u
Gearhead Posts: 5552
From: Oceano, Ca. member# 2895
Registered: Mar 2003
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posted 11-06-2003 11:48 AM
   
ok, I'm ignorant when it comes to these things so I'll try to ask this question as best I can. My 66 coupe has a 7 1/4? rearend and I'm told I should go to an 8. If I do that then I have to go to 5 lug, is this correct? I know a guy who says he can get me an 8" rear with 4 lugs. Is this possible or is he BS'ing me? Thanks for your help guys/gals.------------------
http://webpages.charter.net/adragon8u/mystang
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BlueMule
Gearhead Posts: 1621
From: Kent Island, MD USA M&M # 2423
Registered: Sep 2002
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posted 11-06-2003 12:08 PM
My memory is toast but I believe there were some V8 Mustang IIs with them. edit: I found these @ mustangii.net... http://www.mustangii.net/forums/topic.asp?TOPIC_ID=822 http://www.mustangii.net/photo_template.asp?pagename=Visitors_Gallery&imagename=images/visitors/dan_fisher3.jpg
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-Paul
70 Mach1 351C
79 Ranchero GT
97 Expedition XLT 5.4
00 SVT f150 Lightning 4149 of 4966 Born on: 06/26/2000 'If you're not the lead dog, the view never changes.' [This message has been edited by BlueMule (edited 11-06-2003).]
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Dave Gibson
Moderator Posts: 10139
From: Norfolk, Virginia, USA M&M#166 MCA#47921
Registered: Aug 99
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posted 11-06-2003 02:41 PM
You may want to go ahead and change over to 5 lugs. It's easier to find rims and things like that for your classic stang.  Just don't go after rear gears unless you find a great deal. The price is a little steep.  Dave & Terri ------------------
'65 Mustang Fastback
'02 Explorer XLT
I don't suffer from insanity. I enjoy every minute of it!
We have enough youth, how about a fountain of smart?
Common sense is not so common anymore.
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adragon8u
Gearhead Posts: 5552
From: Oceano, Ca. member# 2895
Registered: Mar 2003
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posted 11-06-2003 03:04 PM
quote:
Originally posted by Dave Gibson:
You may want to go ahead and change over to 5 lugs. It's easier to find rims and things like that for your classic stang. Just don't go after rear gears unless you find a great deal. The price is a little steep.
Dave & Terri
Thanks, that's a logical way to go, but I would perfer to keep the existing centerlines that are on it now for two reasons
1: I like them and don't want to buy another set of rims.
2: I can't really afford to go buy another set of rims.
But I would like to go to some "taller"? gears.------------------
http://webpages.charter.net/adragon8u/mystang [This message has been edited by adragon8u (edited 11-06-2003).]
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adragon8u
Gearhead Posts: 5552
From: Oceano, Ca. member# 2895
Registered: Mar 2003
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posted 11-06-2003 03:08 PM
Thanks for the links bluemule. Will the mustang II rearend fit a 66 coupe? ------------------
http://webpages.charter.net/adragon8u/mystang
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Fastymz
Moderator Posts: 21275
From: Reno Nv USA M&M#1240
Registered: Apr 2001
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posted 11-06-2003 03:42 PM
Mike the I think the 70's Mav's and pinto wagons came with 8" rears with 4 lugs too.
Mike look around for some used 5 lug center line rims. I think the 70's Maveric rears were real close to the 65,you might have to change the spring perche location. I'll do some looking around for more info.------------------
Ron 2.26 60'S
14.9 @ 90.86MPH 65 coupe,351w,C4,Big Boss 429 hood scoop,8" 3.40 TracLoc. My Pics
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BlueMule
Gearhead Posts: 1621
From: Kent Island, MD USA M&M # 2423
Registered: Sep 2002
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posted 11-06-2003 03:57 PM
Mav with V8 had an 8" rear w/5 lugs. Squinto wagons, nope had the funny little non-third member rear with 4 lugs. I'm not sure of the pad-to-pad dimension of the V8 MustangII. You may want to start a thread over in that forum or check with our own Frank (IIGood). ------------------
-Paul 70 Mach1 351C
79 Ranchero GT
97 Expedition XLT 5.4
00 SVT f150 Lightning 4149 of 4966 Born on: 06/26/2000 'If you're not the lead dog, the view never changes.'
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Fastymz
Moderator Posts: 21275
From: Reno Nv USA M&M#1240
Registered: Apr 2001
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posted 11-06-2003 04:05 PM
Paul I pulled the 3rd member I have now from a 72 Mav that had four lugs,and a 8" rear. And the early v6 pinto wagons came with 8" rears.
Mike I have the housing still from the Mav,you can have it,or I can messure it for you. I dont have axles anymore just the housing.------------------
Ron 2.26 60'S
14.9 @ 90.86MPH 65 coupe,351w,C4,Big Boss 429 hood scoop,8" 3.40 TracLoc. My Pics
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adragon8u
Gearhead Posts: 5552
From: Oceano, Ca. member# 2895
Registered: Mar 2003
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posted 11-06-2003 04:17 PM
Thanks Ron: let me check all my options because this is something I have never done and have no idea what I'm doing. My initial thought was to check around a couple of the local wrecking yards and see if I could locate an 8" rearend with 4 lugs if poosible that I could just do a complete swap. Not sure how I would do a swap with the housing. I've heard it's kinda tricky changing out differential gears. Also, money and space is kind of an issue. that's why I was hoping to do a swap out then dispose of the old rearend within a weeks time.------------------
http://webpages.charter.net/adragon8u/mystang
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Mooney
Gearhead Posts: 2071
From: Marietta, Ga
Registered: Oct 2003
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posted 11-06-2003 08:33 PM
I saw a maverick with an 8 inch 4 lug about a week ago at the local pick n pull. If you plan on going that route, theres a guy at fordsix.com that swapped an 8 inch maverick rear end in his to keep his 4 lugs. I think his name was Jimbo. Also if my memory serves me correctly he maybe? had his shipped from california to georgia, so he might be able to point you in the right direction and give you an idea of what a good price would be for one.
But a local pick n pull or something to that extent would be your cheapest bet.
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Fastymz
Moderator Posts: 21275
From: Reno Nv USA M&M#1240
Registered: Apr 2001
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posted 11-06-2003 08:51 PM
Mike I got my 3.40 traclok from pick-n-pull. The whole rear was $75 not a bad price at all. Can you weld at all, if so you can change the perches if need be. Whats wrong with your rear you have now ? ------------------
Ron 2.26 60'S
14.9 @ 90.86MPH 65 coupe,351w,C4,Big Boss 429 hood scoop,8" 3.40 TracLoc. My Pics
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adragon8u
Gearhead Posts: 5552
From: Oceano, Ca. member# 2895
Registered: Mar 2003
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posted 11-06-2003 09:13 PM
thanks for all the advice guys, it's really appreciated.
Ron: The rearend that's in it now was with a 6 cylinder. sometime before I aquired the car a 289 was installed and it seems to be geared to low, and my speedo is off by about 7-10 mph. I had heard that I should change to an 8" rearend and I'm just seeing what my options are. I should be getting my tach this Saturday and that way I can see if it is indeed reving too high. Otherwise, the rearend is fine. But I was kinda hoping for a nice clean swap. (I don't weld  )------------------
http://webpages.charter.net/adragon8u/mystang
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Fastymz
Moderator Posts: 21275
From: Reno Nv USA M&M#1240
Registered: Apr 2001
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posted 11-07-2003 12:35 AM
Mike don't give up yet. An 8" from a 65-66 will slip right in. Keep your eyes open one might show up. Then you can get some nice used 5 lug rims to match your fronts. I'm always seeing those center lines for sale.
Here's alittle info,http://www.woodyg.com/fairlane/finfo/fordrears.html
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Ron 2.26 60'S
14.9 @ 90.86MPH 65 coupe,351w,C4,Big Boss 429 hood scoop,8" 3.40 TracLoc. My Pics [This message has been edited by Fastymz (edited 11-07-2003).]
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BlueMule
Gearhead Posts: 1621
From: Kent Island, MD USA M&M # 2423
Registered: Sep 2002
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posted 11-07-2003 07:04 AM
quote:
Originally posted by Fastymz:
Paul I pulled the 3rd member I have now from a 72 Mav that had four lugs,and a 8" rear. And the early v6 pinto wagons came with 8" rears.
Mike I have the housing still from the Mav,you can have it,or I can messure it for you. I dont have axles anymore just the housing.
I'll slip that in the hip pocket for future reference. ------------------
-Paul 70 Mach1 351C
79 Ranchero GT
97 Expedition XLT 5.4
00 SVT f150 Lightning 4149 of 4966 Born on: 06/26/2000 'If you're not the lead dog, the view never changes.'
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cobraii351
Journeyman Posts: 73
From: Altoona, PA
Registered: Jun 2000
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posted 11-07-2003 07:19 AM
All V6 and V8 Mustang II's had 8" rears. And all V6 pintos had 8" rears as well. The ratios go from 2.79 to 3.55's. I'm not 100% sure but aren't the 4 bolt patterns different from early model to late model? The II has the late model pattern. The 3.55 gears were in v6 4 speed cars, and I noticed that 3.40's in a V6 auto is a standard ratio. Tim ------------------
76 Cobra II
351W powered
C90x "shelby" intake
Ported D0OE heads
Holley 600
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adragon8u
Gearhead Posts: 5552
From: Oceano, Ca. member# 2895
Registered: Mar 2003
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posted 11-07-2003 09:40 AM
Thanks again guys, this is all good info. Thaks for te link Ron, I'm going to print it out for future reference. I really don't want to deal with carrying around 2 spares. so if I goto 5lug in the rear then it's build up the front too(it needs to be done anyway, i know)------------------
http://webpages.charter.net/adragon8u/mystang
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Fastymz
Moderator Posts: 21275
From: Reno Nv USA M&M#1240
Registered: Apr 2001
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posted 11-07-2003 01:33 PM
Mike this is another good site to look at.  http://www.mustangii.net/axle_ratio.asp Tim I didn't know that all v6 Mustang II and pinto wagons came with 8" rears. I was told they stoped using them in the V6's in 76. ------------------
Ron 2.26 60'S
14.9 @ 90.86MPH 65 coupe,351w,C4,Big Boss 429 hood scoop,8" 3.40 TracLoc. My Pics
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cobraii351
Journeyman Posts: 73
From: Altoona, PA
Registered: Jun 2000
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posted 11-07-2003 02:17 PM
I'm not sure about "all" Pinto wagons, But I am pretty sure the at least the V6 cars did. Every V6 car I've looked under had a 8". The wagons are so few and far between (here anyways)I can't remember the last time I saw one. Running or in a bone-yard. Tim ------------------
76 Cobra II
351W powered
C90x "shelby" intake
Ported D0OE heads
Holley 600 [This message has been edited by cobraii351 (edited 11-07-2003).]
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adragon8u
Gearhead Posts: 5552
From: Oceano, Ca. member# 2895
Registered: Mar 2003
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posted 11-08-2003 07:29 PM
Ok guys, I got my tach hooked up and took it down the road aways. according to the calculators on Randys ring and pinion site, I'm running a 3.55 rear?. at 40 mph it's turning 2k. that still seems awful high rpm's to me.------------------
http://webpages.charter.net/adragon8u/mystang
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Fastymz
Moderator Posts: 21275
From: Reno Nv USA M&M#1240
Registered: Apr 2001
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posted 11-08-2003 07:44 PM
mike nothing wrong with 2k at 40mph. Keeps your motor in it's power band.------------------
Ron 2.26 60'S
14.9 @ 90.86MPH 65 coupe,351w,C4,Big Boss 429 hood scoop,8" 3.40 TracLoc. My Pics
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adragon8u
Gearhead Posts: 5552
From: Oceano, Ca. member# 2895
Registered: Mar 2003
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posted 11-08-2003 08:08 PM
so you don't think my rearend is geared to low? ------------------
http://webpages.charter.net/adragon8u/mystang
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Fastymz
Moderator Posts: 21275
From: Reno Nv USA M&M#1240
Registered: Apr 2001
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posted 11-08-2003 08:20 PM
quote:
Originally posted by adragon8u:
so you don't think my rearend is geared to low?
What is your RPM at 60 or 65 mph. If it's around 3000rpm or fine. Unless you want better gas milage, but why would any one want that. ------------------
Ron 2.26 60'S
14.9 @ 90.86MPH 65 coupe,351w,C4,Big Boss 429 hood scoop,8" 3.40 TracLoc. My Pics
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adragon8u
Gearhead Posts: 5552
From: Oceano, Ca. member# 2895
Registered: Mar 2003
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posted 11-08-2003 08:41 PM
I'll have to go out again somewhere maybe tomorrow and see what it reads at 65.
Thanks------------------
http://webpages.charter.net/adragon8u/mystang
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Fastymz
Moderator Posts: 21275
From: Reno Nv USA M&M#1240
Registered: Apr 2001
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posted 11-08-2003 08:57 PM
Mike keep in mind that taller rear tires will cut down on the rpm too.My car runs at about 3000 rpm at 65.------------------
Ron 2.26 60'S
14.9 @ 90.86MPH 65 coupe,351w,C4,Big Boss 429 hood scoop,8" 3.40 TracLoc. My Pics
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65ponycar
Gearhead Posts: 819
From: Dayton, OH
Registered: Jul 2003
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posted 11-19-2003 01:26 AM
quote:
Originally posted by adragon8u:
ok, I'm ignorant when it comes to these things so I'll try to ask this question as best I can. My 66 coupe has a 7 1/4? rearend and I'm told I should go to an 8. If I do that then I have to go to 5 lug, is this correct? I know a guy who says he can get me an 8" rear with 4 lugs. Is this possible or is he BS'ing me? Thanks for your help guys/gals.
I know I'm a few days late on this one, but just searched the archives and thought maybe this may be of interest to you if you had not seen it. Maybe a couple more cars to think about searching for...
https://mustangsandmore.com/ubb/Archives/Archive-000009/HTML/20000507-1-001263.html
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oldmustangjunkie
Journeyman Posts: 28
From:
Registered: Apr 2002
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posted 11-24-2003 11:59 AM
Hello,
I have an 8" rearend for sale. It has new brakes, new diff bearings, and a new R/P gear(3.80:1). The downside is that it is an open rear end. If anyone wants it, I'll throw in a set of front drums for free, to round out someone's V8 conversion. The fronts need to be rebuilt.
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65 Mustang: 5 speed, 3.73's, RAP Ported GT-40 Irons, xe258hr cam, Perf. RPM, 625 cfm Carter AFB, Jacobs ignition
66 Mustang: 289-2V, 3spd, Slipping Clutch, Bashed-up Front End
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adragon8u
Gearhead Posts: 5552
From: Oceano, Ca. member# 2895
Registered: Mar 2003
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posted 11-24-2003 12:05 PM
Thanks again guys. unfortunately some other more important things have come up and I'm afraid that any future work on the mustang is going to have to be mothballed for awhile .------------------
http://webpages.charter.net/adragon8u/mystang
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