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  • 1974 - 1978 Mustang II Talk & Tech

Posi rear installation help

  • Thread starter Thread starter 1WildII
  • Start date Start date Apr 13, 2004
1

1WildII

Member
Oct 6, 2003
199
0
16
Anacortes, Wa
Apr 13, 2004
#1
  • Apr 13, 2004
  • #1
Ok I aquired a posi unit from a friend that is off a 1986 Mustang GT 5.0, the unit only has 26 miles on it and it cost me a whopping $3 (probably for a pack of smokes) But anyways im curious if I can pull out the middle... (excuse me for my lack of knowledge with rear ends) but what all do I have to do? does it just slide out and the new one go in? or do I have to take out the axles or anything? also about how long do you suppose it will take? just walk me through it. Thanks in advance,

Chris
 

Blue coyote

Founding Member
Sep 14, 2002
347
0
16
North America's hemp-basket, BC, Canada
Apr 13, 2004
#2
  • Apr 13, 2004
  • #2
1WildII said:
Ok I aquired a posi unit from a friend that is off a 1986 Mustang GT 5.0, the unit only has 26 miles on it and it cost me a whopping $3 (probably for a pack of smokes) But anyways im curious if I can pull out the middle... (excuse me for my lack of knowledge with rear ends) but what all do I have to do? does it just slide out and the new one go in? or do I have to take out the axles or anything? also about how long do you suppose it will take? just walk me through it. Thanks in advance,

Chris
Click to expand...
Well, the 86 L/S will be either from a 7.5" diff or an 8.8"...downside is that I don't think it will fit in the housing if you have a stock MII rear end (which is probably an 8")
 
1

1WildII

Member
Oct 6, 2003
199
0
16
Anacortes, Wa
Apr 13, 2004
#3
  • Apr 13, 2004
  • #3
well it did come with the entire rear end, any chance I could just swap the entire rears instead of the guts?
 

Blue coyote

Founding Member
Sep 14, 2002
347
0
16
North America's hemp-basket, BC, Canada
Apr 13, 2004
#4
  • Apr 13, 2004
  • #4
1WildII said:
well it did come with the entire rear end, any chance I could just swap the entire rears instead of the guts?
Click to expand...

Depends how good a welder/fabricator you are. The MII uses leaf springs, while the 87 is a 4-link with coils. You would need to remove most of the 4-link mounts and weld on leaf perch plates and shock mounts. If the 86 is a 7.5" then it probably isn't worth the hassle (the 7.5 is a fairly strong diff, but it isn't as tough as the stock 8"). Might be worth doing if its an 8.8 though
 
Z

zwhitr

Founding Member
Aug 26, 2001
847
0
16
Goldsboro, NC
Apr 13, 2004
#5
  • Apr 13, 2004
  • #5
Its been done before I belive rickyD ask sleeper for the link or goto to his web page
 
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