Brought to you in part by:

.

Shop Eastwood for your Auto Restoration Needs!


  Mustangsandmore Forums
  Ford Racing
  poor mans posi

Post New Topic  Post A Reply
profile | register | preferences | faq | search

UBBFriend: Email This Page to Someone! next newest topic | next oldest topic
Author Topic:   poor mans posi
sic67coug
Gearhead

Posts: 170
From: clearlake california
Registered: Dec 2002

posted 04-03-2003 12:19 AM     Click Here to See the Profile for sic67coug   Click Here to Email sic67coug     Edit/Delete Message   Reply w/Quote
ooooooook i tore up my 8 in in my cougar and im taking a welding class at college and i would like to know exactly what do i have to weld to make a poor mans posi? and how hard is it to do? does anyone have any pics of how to do this thanks

IP: Logged

Glens67
Gearhead

Posts: 325
From: Petaluma
Registered: Mar 2002

posted 04-03-2003 01:16 AM     Click Here to See the Profile for Glens67   Click Here to Email Glens67     Edit/Delete Message   Reply w/Quote
A Lincon Locker. Just pour the weld to the spider gears. Spend about 3hours R&R on the rear end. Last for about a week or the first hard spin in a corner. Buy a mini spool they will last longer.

------------------
Glen
67 GT 390
65 Galaxie 500 XL 4 Speed
It was not a Red Light they gave me a Slow Tree
I WAS NOT LATE the Tree was Fast

IP: Logged

capri man
Gearhead

Posts: 3385
From: doerun, ga.
Registered: Nov 2000

posted 04-03-2003 08:51 AM     Click Here to See the Profile for capri man   Click Here to Email capri man     Edit/Delete Message   Reply w/Quote
i have to disagree with you glen. if i welded it, then it probably would break also. i have one in mine that came out of a drag car with well over 400 hp. i have been running it for 4 years with 340 hp and its still working. it it is done very slowly by a good welder, it will work. weld a little, let it cool, weld a little, let it cool.
good luck
by the way, its one of those 7.5 rear ends that folks say wont last also.

------------------
mike r
racing is real
everything else is just a game.
81 capri-7.51 @89mph 1/8
1.54 60 ft.
http://prestage.com/site/site_display.asp?SiteID=141

IP: Logged

Glens67
Gearhead

Posts: 325
From: Petaluma
Registered: Mar 2002

posted 04-03-2003 09:44 AM     Click Here to See the Profile for Glens67   Click Here to Email Glens67     Edit/Delete Message   Reply w/Quote
LUCKY LUCKY LUCKY It's a poor way to lock a rear. I guess that you have never seen a car make an unplaned turn under power from the rear end. Bad at the Track many times worse on the road.

------------------
Glen
67 GT 390
65 Galaxie 500 XL 4 Speed
It was not a Red Light they gave me a Slow Tree
I WAS NOT LATE the Tree was Fast

IP: Logged

capri man
Gearhead

Posts: 3385
From: doerun, ga.
Registered: Nov 2000

posted 04-03-2003 10:31 AM     Click Here to See the Profile for capri man   Click Here to Email capri man     Edit/Delete Message   Reply w/Quote
yup glen, i have seen one of those unplanned turns. it happened when the mini-spool broke in my sons drag car. actually the best way to go is a full spool. i would never under ANY circumstances drive a car with a locked rear end on the street. a damp spot on the hiway and you are history.

------------------
mike r
racing is real
everything else is just a game.
81 capri-7.51 @89mph 1/8
1.54 60 ft.
http://prestage.com/site/site_display.asp?SiteID=141

[This message has been edited by capri man (edited 04-03-2003).]

IP: Logged

sic67coug
Gearhead

Posts: 170
From: clearlake california
Registered: Dec 2002

posted 04-03-2003 10:50 AM     Click Here to See the Profile for sic67coug   Click Here to Email sic67coug     Edit/Delete Message   Reply w/Quote
well ok i just didnt wanna spend 800 bux to put posi in the 8 inch i have id rather have a nine but dont have the money for those right now either thanks for the input guys

IP: Logged

Fstln69
Gearhead

Posts: 325
From: Westmont,il
Registered: Jan 2003

posted 04-03-2003 10:53 AM     Click Here to See the Profile for Fstln69   Click Here to Email Fstln69     Edit/Delete Message   Reply w/Quote
Add extra clutches to the pack and tighten it up,am going to do that with my limited slip in my 9" cheaper then a posi by far

------------------
69 fairlane 351w [email protected] before M&M.. after??
always in search of more HP and faster ET'S

Fstln69 Pics Page

IP: Logged

69 Sportsroof
Gearhead

Posts: 1202
From: Valley, Alabama, USA
Registered: Mar 2002

posted 04-03-2003 11:13 AM     Click Here to See the Profile for 69 Sportsroof   Click Here to Email 69 Sportsroof     Edit/Delete Message   Reply w/Quote
quote:
Originally posted by sic67coug:
well ok i just didnt wanna spend 800 bux to put posi in the 8 inch i have

Take a look at these.....

http://cgi.ebay.com/ebaymotors/ws/eBayISAPI.dll?ViewItem&item=2409113650&category=33731

http://cgi.ebay.com/ebaymotors/ws/eBayISAPI.dll?ViewItem&item=2409883466&category=33731

IP: Logged

bluestreek
Gearhead

Posts: 1289
From: Athens,GA
Registered: Jul 2001

posted 04-03-2003 11:13 AM     Click Here to See the Profile for bluestreek   Click Here to Email bluestreek     Edit/Delete Message   Reply w/Quote
quote:
Originally posted by sic67coug:
well ok i just didnt wanna spend 800 bux to put posi in the 8 inch i have id rather have a nine but dont have the money for those right now either thanks for the input guys

I ran a mini-spool in mine for about a year. It was easier than welding and pretty cheap too. When you get tired of it, you can just put the spider gears back in. It puts a lot of tension on the axles and rear when turning and it feels like the emergency brake is on when moving around the yard and parking lots!. I only used it for cruising and weekends and had to be VERY careful on wet pavement because once the tires break loose the rear has a mind of it's own.

------------------
1966 Mustang Coupe: Custom glass hood and BIG scoop sits atop a 289 stroked to 331 c.i., Steel crank and girdle, 5.4 H-beams, Forged slugs, TFS alum. heads, ported Stealth 8020 intake, Xtreme 274 Solid Roller, Holley 750 HP, long tubes, 4speed, 9" 3.50 posi.
2nd pass: 12.11 @ 114 mph
DanH

IP: Logged

Glens67
Gearhead

Posts: 325
From: Petaluma
Registered: Mar 2002

posted 04-03-2003 01:34 PM     Click Here to See the Profile for Glens67   Click Here to Email Glens67     Edit/Delete Message   Reply w/Quote
quote:
Originally posted by capri man:
yup glen, i have seen one of those unplanned turns. it happened when the mini-spool broke in my sons drag car. actually the best way to go is a full spool. i would never under ANY circumstances drive a car with a locked rear end on the street. a damp spot on the hiway and you are history.


Usually a mini spool fails at the drive pin and the car coast, now if you break an axle with a spool, mini or full, you turn towards the broken axle side. I doubt that the mini spool broke.

------------------
Glen
67 GT 390
65 Galaxie 500 XL 4 Speed
It was not a Red Light they gave me a Slow Tree
I WAS NOT LATE the Tree was Fast

[This message has been edited by Glens67 (edited 04-03-2003).]

IP: Logged

Glens67
Gearhead

Posts: 325
From: Petaluma
Registered: Mar 2002

posted 04-03-2003 01:38 PM     Click Here to See the Profile for Glens67   Click Here to Email Glens67     Edit/Delete Message   Reply w/Quote
quote:
Originally posted by Fstln69:
Add extra clutches to the pack and tighten it up,am going to do that with my limited slip in my 9" cheaper then a posi by far



Be very carefull, that is how you break the case or the clutch retainer. Set the Track-Lock at 155# works fine

------------------
Glen
67 GT 390
65 Galaxie 500 XL 4 Speed
It was not a Red Light they gave me a Slow Tree
I WAS NOT LATE the Tree was Fast

IP: Logged

capri man
Gearhead

Posts: 3385
From: doerun, ga.
Registered: Nov 2000

posted 04-03-2003 02:02 PM     Click Here to See the Profile for capri man   Click Here to Email capri man     Edit/Delete Message   Reply w/Quote
ok, whatever you say glen.

------------------
mike r
racing is real
everything else is just a game.
81 capri-7.51 @89mph 1/8
1.54 60 ft.
http://prestage.com/site/site_display.asp?SiteID=141

IP: Logged

mustangboy
Gearhead

Posts: 652
From: Ont, Canada
Registered: Mar 2002

posted 04-03-2003 04:14 PM     Click Here to See the Profile for mustangboy     Edit/Delete Message   Reply w/Quote
I used a trick from a magazine called $1.98 posi.All you do is add extra shims between the spidergears and the carrier housing.The more shims the tighter it locks it.I just used 1 extra shim and it worked very well on the street.Eventually the shims will wear out but mine lasted for a few years.

------------------
1968 mustang j-code [email protected] 306cu.in, stock ported heads,weiand exellerator,650 holley DP,hedman hedders,comp 292 Magnum cam,4-speed,8 inch 4.11 detroit locker http://mustangsandmore.50megs.com/MembersPics/mustangboy.html

IP: Logged

sick66
Journeyman

Posts: 31
From:
Registered: Nov 2002

posted 04-03-2003 05:40 PM     Click Here to See the Profile for sick66   Click Here to Email sick66     Edit/Delete Message   Reply w/Quote
sic67coug 2 words "detroit locker"....they do make it for an 8 inch...for about 400.

IP: Logged

Bloose
Gearhead

Posts: 275
From: Milwaukee, WI
Registered: Dec 2001

posted 04-03-2003 07:36 PM     Click Here to See the Profile for Bloose   Click Here to Email Bloose     Edit/Delete Message   Reply w/Quote
I put an Auburn Pro Posi in my 8". Works great and cost like $360 from Moser. I cannot figure out why people are paying well over $400 for old factory 8" posi's when there are new ones out there less. The aftermarket posi's are likely better too.

I also ran the "Poor Man's Posi" last year using the shim trick. It actually worked great. I put in an extra shim on each side. Worked good at the track and on the street. I was worried about the stress on the case though so I took it out this year and went to the Pro Posi. When I added the shims I planned for it to be temporary so I changed it out as planned. Plus running the NOS this year the 8" will be enough of a liability, no reason to push my luck. It did work good though and I had no problems with it.

HTH,
B-loose

IP: Logged

n2oMike
Gearhead

Posts: 1547
From: Spencer, WV
Registered: Jan 2001

posted 04-03-2003 09:07 PM     Click Here to See the Profile for n2oMike   Click Here to Email n2oMike     Edit/Delete Message   Reply w/Quote
The Auburn is a clutch type unit, and it's not rebuildable. So once it wears out, it's disposable.

The Detroit Locker is the better unit for the track. For the street, it depends upon how you want to use the unit, and how much you want to spend.

Good Luck!

------------------
Mike Burch
66 mustang real street
302 4-speed 289 heads
10.63 @ 129.3
http://www.geocities.com/carbedstangs/cmml_mburch.html
http://www.fortunecity.com/silverstone/healey/367
http://www.mustangworks.com/cgi-bin/moi-display.cgi?220

IP: Logged

sic67coug
Gearhead

Posts: 170
From: clearlake california
Registered: Dec 2002

posted 04-04-2003 12:18 AM     Click Here to See the Profile for sic67coug   Click Here to Email sic67coug     Edit/Delete Message   Reply w/Quote
ok nowthat i have a few more replys how exactly do you put the shims in? im not fluent with rear ends (automotive) so exactly where do i shim it? this will give me time to let my fund recoup after the baby being born and ill get a locker or spool somthin thanks fellas

IP: Logged

DidgeyTrucker
Gearhead

Posts: 1057
From: Greenbrier, TN USA
Registered: Oct 99

posted 04-04-2003 11:53 AM     Click Here to See the Profile for DidgeyTrucker   Click Here to Email DidgeyTrucker     Edit/Delete Message   Reply w/Quote
IF you decide to go the "$1.98" way, the extra shims are side gear washers. Dismantle the entire carrier, add one extra side gear washer per side and re-assemble the whole thing. I ran one of these on the track and street and it really locked up the rear end. I usually "power braked" around slow turns to make the inside tire spin since it didn't want to turn slower like with an open rear end. When the shims would slip and let one tire turn faster or slower around corners, it made the most awful POP sound. I thought I had cracked the carrier once.

Tracy

[This message has been edited by DidgeyTrucker (edited 04-04-2003).]

IP: Logged

Fastymz
Moderator

Posts: 11429
From: Reno Nv USA MEM#1240
Registered: Apr 2001

posted 04-04-2003 12:33 PM     Click Here to See the Profile for Fastymz   Click Here to Email Fastymz     Edit/Delete Message   Reply w/Quote
Wouldn't it be as easy,and more safe to put a mini spool in?
I have a friend thats used one on the street for years.Yes he drives slow around turns.And it's kinda hard in tight parking lots.But it works and it's cheap.

------------------
SCOOP
oddly obsessed with big scoops on little Mustangs

2.26 60'S
14.9 @ 90.86MPH

65 coupe,351w,C4,Big Boss 429 hood scoop,8"3.40 TracLoc,Cragar SS,Black Suede.

https://mustangsandmore.com/ubb/Fastymz.html

IP: Logged

Bloose
Gearhead

Posts: 275
From: Milwaukee, WI
Registered: Dec 2001

posted 04-04-2003 02:59 PM     Click Here to See the Profile for Bloose   Click Here to Email Bloose     Edit/Delete Message   Reply w/Quote
quote:
Originally posted by Fastymz:
Wouldn't it be as easy,and more safe to put a mini spool in?



With the "$1.98" locker it is not a true locker. Around turns the inner shaft will be allowed to turn at a different rate than the outer. This is why I ran this setup instaed of a mini spool. Mine did make some noise but nothing terrible. Just enough to get strange looks in parking lots , it was really kinda fun.


B-loose

IP: Logged

Bloose
Gearhead

Posts: 275
From: Milwaukee, WI
Registered: Dec 2001

posted 04-04-2003 03:04 PM     Click Here to See the Profile for Bloose   Click Here to Email Bloose     Edit/Delete Message   Reply w/Quote
quote:
Originally posted by n2oMike:
The Auburn is a clutch type unit, and it's not rebuildable. So once it wears out, it's disposable.

The Detroit Locker is the better unit for the track. For the street, it depends upon how you want to use the unit, and how much you want to spend.

Good Luck!



This is true. Auburn has a exchange program for when it wears out. I seriously doubt I will ever put enough miles on the Auburn to wear it out though.

If I had known that I could get a new Detroit for my 8" for around $400 that is the route I would have likely taken. But I'm sure the Auburn will work well. Also, the Auburn for the 8" is the Pro Posi which should be pretty good.

I just don't get why people pay well over $400 for a stock posi (an old used one at that). It just baffles me.

B-loose

IP: Logged

Fastymz
Moderator

Posts: 11429
From: Reno Nv USA MEM#1240
Registered: Apr 2001

posted 04-04-2003 03:11 PM     Click Here to See the Profile for Fastymz   Click Here to Email Fastymz     Edit/Delete Message   Reply w/Quote
quote:
Originally posted by Bloose:


If I had known that I could get a new Detroit for my 8" for around $400 that is the route I would have likely taken.

I just don't get why people pay well over $400 for a stock posi (an old used one at that). It just baffles me.

B-loose


I dont get it either.I found mine in a junk yard for $70.I keep looking for another one to sale on Ebay for 1,000,000.

Were can you get a Detroit locker for $400 ???
I'd like to look into that too.


------------------
SCOOP
oddly obsessed with big scoops on little Mustangs

2.26 60'S
14.9 @ 90.86MPH

65 coupe,351w,C4,Big Boss 429 hood scoop,8"3.40 TracLoc,Cragar SS,Black Suede.

https://mustangsandmore.com/ubb/Fastymz.html

IP: Logged

BLstangin
Gearhead

Posts: 357
From: South Central MN
Registered: Apr 2002

posted 04-09-2003 11:11 PM     Click Here to See the Profile for BLstangin   Click Here to Email BLstangin     Edit/Delete Message   Reply w/Quote
Glens67 at 155# how does the trac lok act on the street. Does it drive like an open until you get on it then it locks solid? My friend has a rebuilt trac lok 9" in his truck and has 12" wide tread on his tires. When he is just driving it works just like an open, now if he gets on it and one wheel even thinks of spinning it locks solid, he can even be half way around a corner and then as soon as he hits the gas it just immediatly wipes sidways on him just like it has a brain or something. I called the company he got if from, but their specs are a big secret or something i guess. Is this how a trac lok will work with 155# pressure?

------------------
1970 coupe restored with the help of my dad. 302 with 600 holley, aluminum intake, headers, pertonix ignitor 2 with matched coil, lakewood bellhousing, 4-speed toploader, and 2.79 open 8" rear. Soon to be 9" 3.25 trac-lok
1986 f-150, 5.0, factory towing package with original c-6 trans

IP: Logged

All times are ET (US)

next newest topic | next oldest topic

Administrative Options: Close Topic | Archive/Move | Delete Topic
Post New Topic  Post A Reply
Hop to:

Contact Us | Mustangsandmore Front Page

Copyright 2003, Steve LaRiviere. All Rights Reserved.


Ultimate Bulletin Board 5.47d

Amazon Honor System Click Here to Pay Learn More

[Build a free Mustangsandmore.ws Home Page!]

[About M&M][Acronyms][Calendar][Chat][Classifieds] [Members' Pics] [M&M Mug Shots]

[ Mustangsandmore.com Bookstore] [Mustangsandmore.com T-Shirts][Tech Articles]