8.8 rearend swap with 4:10 gears - Mustang Evolution

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Old 09-13-2013, 09:52 AM   #1
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8.8 rearend swap with 4:10 gears

Alright I've searched and searched on google and there's no straight forward guide on how to do it. Everyone says that it's really easy and shouldn't be a problem to do.

So what all do I need? I want to also go ahead and put some 4:10 gears in there (I have an automatic) at the same time. All I will need are an 8.8 rear off a 99 or up, brand new gears (gunna stay away from used gears) and new fluid to go in the rearend?

I'm gunna pick up a 8.8 of CL or take one off a GT at a junk yard. I don't have to weld anything or do anything special to put the gears in do I?

Also what's the best way to change them out and how do I jack my mustang up to get to the rearend to take it off?

Thanks guys!
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Old 09-13-2013, 10:11 AM   #2
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You will need to pay someone to install the gears. I would also recommend new bearings and rebuilding the locker since it will be apart.
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Old 09-13-2013, 11:28 AM   #3
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Im subscribed cuz i wana know too im thinking of doing it too
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Old 09-13-2013, 11:30 AM   #4
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You will need to pay someone to install the gears. I would also recommend new bearings and rebuilding the locker since it will be apart.
Yeah installing gears is a professional job. I would suggest you send the rear end to get rebuilt and the gears installed . Then install the rear end yourself. It's easy. Jack the car like normal but put jack stands on the frame of the vehicle. Remove calipers, rotors, shocks, and unbolt the rear end and it'll drop. I recommend some help dropping it cause I hear those things are heavy
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Old 09-13-2013, 11:31 AM   #5
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Gears are something you don't want to even touch unless you are specialized for it.... There are guys on here that will build an entire engine themselves from scrap, but won't touch gears.... Just pay someone to do it.
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Old 09-13-2013, 11:37 AM   #6
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So have them rebuild the rearend and put the gears in it then bolt it on my car. Gotcha how much would they charge me for doing the gears? Found a 8.8 rearend with only 20000 miles on it out of a gt that's totaled. 100 dollars how much would it be to have that with gears installed?
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Old 09-13-2013, 01:17 PM   #7
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So have them rebuild the rearend and put the gears in it then bolt it on my car. Gotcha how much would they charge me for doing the gears? Found a 8.8 rearend with only 20000 miles on it out of a gt that's totaled. 100 dollars how much would it be to have that with gears installed?
I spend on mine $800 included the 8.8 rear end, with 3.73 and the whole kit bearing oil etc....
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Old 09-13-2013, 01:30 PM   #8
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Gears is all about matching really so there's no play in there for whining sound. But yes have someone do it if you don't have any experience. I installed mine with a friend but we both work on cars alot.
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Old 09-13-2013, 04:48 PM   #9
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I spend on mine $800 included the 8.8 rear end, with 3.73 and the whole kit bearing oil etc....
800!?!? Ugh was that buying a brand new 8.8 rear?
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Old 09-13-2013, 08:46 PM   #10
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800!?!? Ugh was that buying a brand new 8.8 rear?
$ 800 included the the whole 8.8 rear end differential and 3.73 gear and gear kit oil and labor. I think that's not bad for the price.
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Old 09-13-2013, 09:13 PM   #11
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$ 800 included the the whole 8.8 rear end differential and 3.73 gear and gear kit oil and labor. I think that's not bad for the price.
How do the gears feel? And can u still grab second with the 8.8?
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Old 09-13-2013, 09:31 PM   #12
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I got the stock 3.45's with an 8.8, I don't peel out like I use to with the open diff 7.5 with 2.73's.
Instant traction, and it accelerates faster.
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Old 09-13-2013, 10:08 PM   #13
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I got the stock 3.45's with an 8.8, I don't peel out like I use to with the open diff 7.5 with 2.73's.
Instant traction, and it accelerates faster.
Where'd you get 3.45s??
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Old 09-13-2013, 10:12 PM   #14
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I bought a totaled 01 gt for parts, then sold it for the engine only. I got a flowmaster exhaust and BBK CAI with the 8.8 rear end for $280. I was thinking of an engine swap, but decided not to, it would of been down forever and I don't like the 4.6 engines...
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Old 09-14-2013, 02:13 AM   #15
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I bought a totaled 01 gt for parts, then sold it for the engine only. I got a flowmaster exhaust and BBK CAI with the 8.8 rear end for $280. I was thinking of an engine swap, but decided not to, it would of been down forever and I don't like the 4.6 engines...
I didn't know they came with 3.45s though
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Old 09-14-2013, 02:26 AM   #16
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Stock 7.5 and 8.8 rear ends from 99-04 came stock with 3.27s
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Old 09-14-2013, 02:57 AM   #17
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I thought it said 3.45's on the plate, maybe it was 3.27's...
either way it's better than the stock 2.73's I had in my 1995, great for MPG's not so good for drag racing though...
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Old 09-14-2013, 11:39 AM   #18
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People say they don't see that much of a loss in gas mileage with 4:10s like at 70 it's only 2400 RPMs instead of 2000 but supposedly that's what they were getting in a YouTube video. If you get a CAI and duels your gas mileage does go
Up some mine did after I got a CAI and duels.
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Old 09-14-2013, 11:49 AM   #19
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With 2.73 I could do 80mph at 2000rpm now i do 70 at 2000rpm. And that's just with 3.27.
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Old 09-14-2013, 10:40 PM   #20
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With 2.73 I could do 80mph at 2000rpm now i do 70 at 2000rpm. And that's just with 3.27.
I did the same swap. Mine takes off a lil faster it was noticeable but not majorly. I want 3.55 or 3.73s
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Old 09-15-2013, 02:24 AM   #21
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Main difference I've noticed is two wheel burnouts, I have to power brake it though. The posi just grabs and goes. No more peeling out from stop signs.
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Old 09-15-2013, 08:36 PM   #22
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Never mind!
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