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8.8 rear end swap

  • Thread starter Thread starter dapenberthy
  • Start date Start date Sep 29, 2011
D

dapenberthy

New Member
Sep 15, 2011
12
0
0
St. Louis, MO
Sep 29, 2011
#1
  • Sep 29, 2011
  • #1
would an 8.8 rear end, measuring 53" from backer plate to backer plate, with disc brakes fit (without modification) on my 68 coupe?
 

robbz28

Member
Sep 23, 2009
775
5
19
Epps, LA
Sep 29, 2011
#2
  • Sep 29, 2011
  • #2
I know im not answering your question, but im just curious...do you currently have an 8" under your car? If so why are you wanting the 8.8? Are you getting it for free or already have it?
 
D

dapenberthy

New Member
Sep 15, 2011
12
0
0
St. Louis, MO
Sep 29, 2011
#3
  • Sep 29, 2011
  • #3
have a i6, four lug all the way around. swapping in a 5.0, with top loader 4 speed.
 

robbz28

Member
Sep 23, 2009
775
5
19
Epps, LA
Sep 29, 2011
#4
  • Sep 29, 2011
  • #4
Ok...good move then...a lot of people want to swap out an 8" for an 8.8 and unless you are grunting out over 400 horses and beating it to death every weekend at the track, the 8" should hold up fine....but surely someone on here will be able to help you out with that info....unfortunately thats not me, good luck with your conversion!
 

brianj5600

Active Member
Sep 19, 2003
1,964
2
39
Middle TN
Sep 29, 2011
#5
  • Sep 29, 2011
  • #5
What did it come out of? Are talking dust shields? Explorer 8.8? I had a 95GT 8.8 in mine with 02ish MachI wheels on mine w/o spacers and it worked fine. I also had 15x8 wheels with 5.5 be with 275/50/15 drag radials.
 
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dapenberthy

New Member
Sep 15, 2011
12
0
0
St. Louis, MO
Sep 29, 2011
#6
  • Sep 29, 2011
  • #6
it came out of a truck. 1995-2000 373 gears
 

horseballz

10 Year Member
Sep 30, 2009
824
19
49
Las Vegas, NV
Sep 29, 2011
#7
  • Sep 29, 2011
  • #7
The supposed problem is that if it came from a Ranger or Explorer, the pinion (the part the drive shaft mounts to) is off center to the right side. Some claim this causes no issue, others claim drive shaft rubbing/exhaust clearance issues/drive shaft angle problems and still others shorten the driver side tube about 3 inches and use a right side shaft for the left. In stock form from an Explorer it will be 1/2" wider overall than your original in the 68 and if you shorten the left tube to center the pinion it will be 2 1/2" narrower the the 68. I've seen a couple "How-To" articles on this and will post a link if I can find it.
HTH,
Gene
 
L

lord_cobra

Member
Sep 2, 2005
96
6
9
Oct 5, 2011
#8
  • Oct 5, 2011
  • #8
robbz28 said:
Ok...good move then...a lot of people want to swap out an 8" for an 8.8 and unless you are grunting out over 400 horses and beating it to death every weekend at the track, the 8" should hold up fine....but surely someone on here will be able to help you out with that info....unfortunately thats not me, good luck with your conversion!
Click to expand...

I know a lot of people say to keep the 8" but I am also thinking of going with an 8.8. I think that with an 8.8 you can find a decent newer rear end with 3.55 or 3.73 gears, limited slip, and disc brakes for cheaper than it would take to fix up the 8". I could be wrong though. I am interested in what others think.
 

331efiblue66

Member
Oct 11, 2006
111
1
17
Fort Wayne, IN
Oct 6, 2011
#9
  • Oct 6, 2011
  • #9
I used an explorer axle in mine, and probably for the same reasons most of the others did. Big bearing tube ends, 31 spline axles, disc brakes, oem parts readily and cost effectively available. The swap wasn't terribly difficult, just time consuming. To cure the offset pinion problem, I cut off both tube ends and swapped them side for side, and cut off the needed dimension from the driver side tube to get the overall width correct, then welded the ends back on, and ordered new axles from Moser. Working on sawhorses in my garage with a tape measure, I came out within 1/16" of the same width as the stock axle. Now that I have my wheels/tires bought, I wish I would have taken another 1/2" out while I was doing it....In short, make a plan to suit your needs/wants/budget and go for it.
 

robbz28

Member
Sep 23, 2009
775
5
19
Epps, LA
Oct 7, 2011
#10
  • Oct 7, 2011
  • #10
lord_cobra said:
I know a lot of people say to keep the 8" but I am also thinking of going with an 8.8. I think that with an 8.8 you can find a decent newer rear end with 3.55 or 3.73 gears, limited slip, and disc brakes for cheaper than it would take to fix up the 8". I could be wrong though. I am interested in what others think.
Click to expand...

I guess that just depends on what you wanted out of your rear, im not ever going to road race my car, so the factory rear drums are more than adequate. I guess it just depends also on what 8.8 you find...if you find one with some desirable gears and limited slip and could get it for a couple hundred bucks then i could see doing a swap, provided you have the skills/tools to do the swap yourself without having to pay someone to fab it up for you. The 8.8 is a great rear end, i would imagine if I found the right combo for the right price I might would do the swap myself...i have those dinky 2.79 gears and one tire fire and I definately want to fix that soon, but its going to cost me 700 bucks to do that with a new posi, gears, and a bearing kit.
 
L

lord_cobra

Member
Sep 2, 2005
96
6
9
Oct 11, 2011
#11
  • Oct 11, 2011
  • #11
robbz28 said:
I guess that just depends on what you wanted out of your rear, im not ever going to road race my car, so the factory rear drums are more than adequate. I guess it just depends also on what 8.8 you find...if you find one with some desirable gears and limited slip and could get it for a couple hundred bucks then i could see doing a swap, provided you have the skills/tools to do the swap yourself without having to pay someone to fab it up for you. The 8.8 is a great rear end, i would imagine if I found the right combo for the right price I might would do the swap myself...i have those dinky 2.79 gears and one tire fire and I definately want to fix that soon, but its going to cost me 700 bucks to do that with a new posi, gears, and a bearing kit.
Click to expand...

Yep. I am in the same boat as you with my rear.
 
D

dapenberthy

New Member
Sep 15, 2011
12
0
0
St. Louis, MO
Oct 12, 2011
#12
  • Oct 12, 2011
  • #12
pulled the trigger on the 8.8. hopefully it works out. if not, back to the drawing board.
 
L

lord_cobra

Member
Sep 2, 2005
96
6
9
Oct 19, 2011
#13
  • Oct 19, 2011
  • #13
dapenberthy said:
pulled the trigger on the 8.8. hopefully it works out. if not, back to the drawing board.
Click to expand...

Awesome. What did you pick up?
 
C

CrisNavarro

Active Member
Apr 29, 2020
107
14
28
Spain
Jul 17, 2020
#14
  • Jul 17, 2020
  • #14
Hi guys! I am looking to install a 347 stroker in my '68. My rear end looks like Dana44 and some friends recommended about to install a posi diferential. I found in internet a offer for 8.8 posi 31, what do you think? Will be a good option?
 
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