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SuperDan
Site Admin
Joined: Sep 15, 2009
Posts: 4560
Location: Canetuck, N.C.
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 Posted: Mon Apr 19, 2010 11:05 am Post subject: Rear end build |
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| So I just got a spare 8.8 out of a 2001 GT. My plan is to build it as i go, 31 splines axles, 3.73s, aftermarker posi unit, c-clip eliminators, and so on. The problem is, i know nothing about the guts of a rear end. Any sugestions? Im thinking about running Mosur (spell check) axles, FRPP gears, and no idea on the other stuff. |
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mustangfu
Parts Changer
Joined: Sep 24, 2009
Posts: 268
Location: Stafford, VA
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| Posted: Mon Apr 19, 2010 12:53 pm Post subject: |
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http://tinyurl.com/y28b6jg
...lol. But seriously, solid rear ends are easy to build, it really just comes down to what brands you're loyal to and how much money you want to spend. Kind of like superchargers, there are tons of them out there, they all make good power, it just depends on what brand you want to sticker your car with.
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America promised us freedom; Ford gave us the keys.
1967 Mustang (39,000 original miles) - SOLD
1968 Mustang (351W swap, ~400hp) - SOLD
1994 Mustang GT (5.0 that ruled my home town) - SOLD
1995 Mustang GT Conv. (54,000 original miles) -SOLD |
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01GT
Dangerous
Joined: Oct 12, 2008
Posts: 643
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| Posted: Mon Apr 19, 2010 3:38 pm Post subject: |
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Most factory 3.27 to 3.73 changes you can use the same pinion shim...(.25 Shim 3.27 Gears)
Thickness of both the shim and the pinion Gear should 9.06 total...
And carrier shims keep them the same also...(use the factory carrier shims)
Between .008 and .0012 backlash...(side to side of the carrier)
Mine Is .009...
Zero out the pinion when tightening check the Wear pattern...
Do the check without the crush sleeve first...
Once the pattern is correct do it again with the crush sleeve...
I did this exact change and have never had a problem...
Trac lock rebuild...
http://www.therangerstation.com/tech_library/rebuild_tractionlock.htm
Axle Rebuilds...
http://www.richmondgear.com/01instructions.html
http://www.usgear.com/ring__pinion_installation.htm
Hope this will help...
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07 Dodge Ram 4x4
93 Mustang Coupe |
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SuperDan
Site Admin
Joined: Sep 15, 2009
Posts: 4560
Location: Canetuck, N.C.
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| Posted: Mon Apr 19, 2010 4:19 pm Post subject: |
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thanx 01GT. Im scared that this is gonna turn into another one of my expensive projects.  |
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01GT
Dangerous
Joined: Oct 12, 2008
Posts: 643
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| Posted: Mon Apr 19, 2010 4:54 pm Post subject: |
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I have 31 spline carrier...FMS-M-4204-F318 $260.00
31 spline Mosers MSR-A883153 $280.00
3.73 Gears FMS-M-4209-F373N $150.00
And i have a 8.8 Diff girdle MAC...$125.00
Standard Bearing kit...$125.00
Summit prices...
Yea It sure does add up...
I have done at least 30 Rev limiter slick launches...
I have a bearing press if you need some pressed on...
I live in Rocky Point down from Pauls Place...
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07 Dodge Ram 4x4
93 Mustang Coupe |
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SuperDan
Site Admin
Joined: Sep 15, 2009
Posts: 4560
Location: Canetuck, N.C.
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| Posted: Mon Apr 19, 2010 6:40 pm Post subject: |
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| yea you told me you lived over by C and B. Isnt there an Explorer factory 31 spline unit everybody is always hunting down? |
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JDawg22
Dangerous
Joined: Mar 21, 2010
Posts: 693
Location: Home
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| Posted: Mon Apr 19, 2010 6:47 pm Post subject: 3.90 gears |
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AM carries a 3.90 gear thats supposed to be really good. Kinda in btw the 373 & 410. I had frpp gears in my last o2 gt. 3.73. never had a problem. and a frpp alum. drive shaft. loved'em.
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JDawg22
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01GT
Dangerous
Joined: Oct 12, 2008
Posts: 643
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| Posted: Mon Apr 19, 2010 7:37 pm Post subject: |
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| SuperDan wrote: | | yea you told me you lived over by C and B. Isnt there an Explorer factory 31 spline unit everybody is always hunting down? |
Yup...
I have one but i chipped one of the spider gears...
If you get new spider gears for it i will let you get it for $60...
Still in perfect shape...
Spider gears might cost you $100 or less... |
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SpeedJunky
Laying Rubber
Joined: Jan 17, 2009
Posts: 1379
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| Posted: Mon Apr 19, 2010 8:35 pm Post subject: |
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| Sounds like a good build man. I would look into 9 inch ends instead of c-clip eliminators though, c-clip elimins are known for leaking on street cars that go through the miles. Also, if you're gonna spend money on a good set of 31 spline axles, don't go with another LSD unit. Look into the Eaton True-Tracs or Lockers. I would get a girdle for a little extra protection too-Summit has a moser one that's $120 I think. Look forward to hearing what you go with. |
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SuperDan
Site Admin
Joined: Sep 15, 2009
Posts: 4560
Location: Canetuck, N.C.
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| Posted: Mon Apr 19, 2010 9:47 pm Post subject: |
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ill talk with you a little more in deapth about that next time i see you Scott.
if i decide to go that route ill get up with ya Sandy.
A 3.90 gears a lil too much for me Jdogg. I think the 3.73 will best fit my needs.
Last edited by SuperDan on Tue Apr 20, 2010 2:36 pm; edited 1 time in total |
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SpeedJunky
Laying Rubber
Joined: Jan 17, 2009
Posts: 1379
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| Posted: Tue Apr 20, 2010 12:49 pm Post subject: |
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| I can attest that 4.10s is too much for centrifugals, trapping at 6300 rpms in fourth gear. 3.73s would be a good one IMO. Maybe tweak one higher or lower after a few track days if you need to. |
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01GT
Dangerous
Joined: Oct 12, 2008
Posts: 643
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| Posted: Tue Apr 20, 2010 2:27 pm Post subject: |
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| SpeedJunky wrote: | | Sounds like a good build man. I would look into 9 inch ends instead of c-clip eliminators though, c-clip elimins are known for leaking on street cars that go through the miles. Also, if you're gonna spend money on a good set of 31 spline axles, don't go with another LSD unit. Look into the Eaton True-Tracs or Lockers. I would get a girdle for a little extra protection too-Summit has a moser one that's $120 I think. Look forward to hearing what you go with. |
I have seen many Eatons go south from 400hp cars...(3 to be exact)
Sandy |
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holcombford
Parts Changer
Joined: Apr 19, 2009
Posts: 336
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| Posted: Tue Apr 20, 2010 3:16 pm Post subject: |
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| Put an Auburn in it...they have a warranty and the pro series is cheaper than the eaton and stronger as well. I would agree with putting the nine inch ends on the housing instead of the c-clip elims. I also would go with a girdle but I would go with a TA over one of the cheap ones like the mac or the moser...the castings arent that good and I have seen them crack. The thing about a rear end is that if you use good stuff and everything is setup properly you should not have to do it but once especially on a street car. |
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SpeedJunky
Laying Rubber
Joined: Jan 17, 2009
Posts: 1379
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| Posted: Tue Apr 20, 2010 3:27 pm Post subject: |
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I have heard of a couple instances where the true tracs have went bad, but they are designed for a dual purpose street/strip application, not to be beat on consistently hard at the drag strip.
As for the Ford Racing one, I would say that one is worse than the stock LSD for one wheel peels and inconsistent launches with M/T ET street radials.
Not an attack, just my opinion. I have never run the true trac but plan on buying one in a couple of weeks to build my 8.8. I have run the FRPP one and did not like it. |
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SpeedJunky
Laying Rubber
Joined: Jan 17, 2009
Posts: 1379
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| Posted: Tue Apr 20, 2010 3:29 pm Post subject: |
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| Thanks for the advice Blake! I will be hitting you up for rear end build parts as well in a couple of weeks |
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