Rear end rebuild

[Blk04MM]

I'm thinking about going in and doing the work myself. How tough of a job am I facing or would I not know until I get in everything out and inspect.

It was dark when the car got towed home. It's in the driveway now. I know there is oil in the rear driver tire now.

I'm trying to see what my best bet here is to do. Pull it myself or go to a shop and get my wallet taken from me on labor cost or would it be just the basic $250-300 as a gear swap

I looked online and found axles for pretty cheap along with master gear instal kits

[tallpaul]

If you have never done it before then take it to a shop. Setting up the gears can be tricky and there is no room for error.

[Blk04MM]

If you have never done it before then take it to a shop. Setting up the gears can be tricky and there is no room for error.

Never done gears before ...I figured that'll be my road block

[Shaijack]

I vote shop. Don't want the new gears to wear bad and make noise.

[JBFTech]

If you get new gears, definitely take it to a good shop, or find a buddy who has the tools and know-how. Installing them is easy, it's setting the pinion depth, preload, and backlash that takes the tools and know-how.


Sent from my SR-71 using Tapatalk

[Curless]

SHOP, hands down. I own a shop, have all of the tools, been trained, certified to do the work...I still have a friend that builds rear ends everyday come in to double check my work and help with the settings. If you don't have a pinion depth gauge, dial indicator, Prussian blue, and know how to use them...DON'T EVEN THINK ABOUT IT.

That being said, I will not say that you can't do the work or learn to do it right.

[fastblackmerc]

I'd go to a reputable shop.

[RoyLPita]

What ^^^^they^^^^ said. Taking them apart is a no brainer. Setting them back up is another story.

[03mmmonroe]

I'm thinking about going in and doing the work myself. How tough of a job am I facing or would I not know until I get in everything out and inspect.

It was dark when the car got towed home. It's in the driveway now. I know there is oil in the rear driver tire now.

I'm trying to see what my best bet here is to do. Pull it myself or go to a shop and get my wallet taken from me on labor cost or would it be just the basic $250-300 as a gear swap

I looked online and found axles for pretty cheap along with master gear instal kits

you may want to look for a good used crown vic rear end with 31 spline and 3:55 gear from factory. I found one with 15k miles in Atlanta GA for $800 shipped to my door. I have done the axle repair on other marauder with the soft axle but for setting up gears I take it to a good shop.

[Blk04MM]

Will any ford 8.8 rearend fit? Or does it have to be within a specific year ??

[03mmmonroe]

Will any ford 8.8 rearend fit? Or does it have to be within a specific year ??

I think it is 2005 and newer and I think the 2008 and newer have the 31 spline.

[Blk04MM]

I think it is 2005 and newer and I think the 2008 and newer have the 31 spline.

Anyone can verify the info??

Why 05+??

[03mmmonroe]

Anyone can verify the info??

Why 05+??
lincolnpimp
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Order Ford OEM 31 spline axles for a 2007 crown vic police interceptor. Ford has them on the shelf and they are half the price of aftermarket, and imo just as strong. They also come with the abs ring installed! I just did this upgrade with a detroit locker and it worked sweet!

[Blk04MM]

lincolnpimp
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Order Ford OEM 31 spline axles for a 2007 crown vic police interceptor. Ford has them on the shelf and they are half the price of aftermarket, and imo just as strong. They also come with the abs ring installed! I just did this upgrade with a detroit locker and it worked sweet!

I know as far as 31 spline.

Sorry I could've been more detailed with my question.
But if someone has a later model 8.8 rear with 31 spline upgrade 03-04 carbon clutches and gear upgrade is that a good buy or does it still need to be 05+ with the abs ring installed?

[crownvic05]

EARLY 2005s did still have 28 spline axles

The cutoff BUILD DATE is 12/04/2004. This date or earlier indicates a 28 spline rear axle. 12/06/2004 or later indicates a 31 spline rear axle assembly.

Check your driver's door sticker. Note, a day is not provided, however if the date is 1/05 or later it is 31 spline. If 12/04, you will need the exact build date to determine if it falls before or after the split

[Vortech347]

Unless you are planning on 10's/11's anytime soon don't worry about doing 31 spline stuff.

[Blk04MM]

Unless you are planning on 10's/11's anytime soon don't worry about doing 31 spline stuff.


sure dont im NA

[Blk04MM]

EARLY 2005s did still have 28 spline axles

The cutoff BUILD DATE is 12/04/2004. This date or earlier indicates a 28 spline rear axle. 12/06/2004 or later indicates a 31 spline rear axle assembly.

Check your driver's door sticker. Note, a day is not provided, however if the date is 1/05 or later it is 31 spline. If 12/04, you will need the exact build date to determine if it falls before or after the split



so long story short ANY ford 8.8 rear will bolt up. only difference is the spline

[Blk04MM]

found a 8.8 out of a 95 cobra. recently built, has 4.10s, built 03/04 carbon clutches ...just awaiting to findout if it has 28 or 31 spline. for $350. guy bought the car and is parting out what he dont need. said all parts are on the car and is driveable if i wanted to make sure its no issues. he can pull it or I can on site.

good buy?

[RoyLPita]

found a 8.8 out of a 95 cobra. recently built, has 4.10s, built 03/04 carbon clutches ...just awaiting to findout if it has 28 or 31 spline. for $350. guy bought the car and is parting out what he dont need. said all parts are on the car and is driveable if i wanted to make sure its no issues. he can pull it or I can on site.

good buy?

It would be a good buy for one with a Mustang. It may be an 8.8 but is pretty much where the similarities end.

Off subject... Are you up North or down South?

[Vortech347]

found a 8.8 out of a 95 cobra. recently built, has 4.10s, built 03/04 carbon clutches ...just awaiting to findout if it has 28 or 31 spline. for $350. guy bought the car and is parting out what he dont need. said all parts are on the car and is driveable if i wanted to make sure its no issues. he can pull it or I can on site.

good buy?

If it comes with the 4.10's its a fair deal. Most used gears go for 50-100$, Diffs anywhere between "get it out of my garage for free" to $200, the Cobra clutches are $110.

For $350 make him pull it. If its an OEM dif it will be 28 spline which is plug n' play for the MM.

[Vortech347]

It would be a good buy for one with a Mustang. It may be an 8.8 but is pretty much where the similarities end.

Off subject... Are you up North or down South?

True, the axles/housing will not work for a Marauder. But the diff, diff guts, and 4.10's will carry over just fine.

[RoyLPita]

True, the axles/housing will not work for a Marauder. But the diff, diff guts, and 4.10's will carry over just fine.

My bad. Thanx for the clarification.

[Curless]

No this is not a good idea....what good will it do to have a center section out of another rear end??? You still have to buy the instal kit and reset your pinion depth and back lash...all that work, new bearings and crush sleeve and used gears???? to save how much??? If used gears are worth $50 - $100 why would you not buy new ones for $140???

[Vortech347]

No this is not a good idea....what good will it do to have a center section out of another rear end??? You still have to buy the instal kit and reset your pinion depth and back lash...all that work, new bearings and crush sleeve and used gears???? to save how much??? If used gears are worth $50 - $100 why would you not buy new ones for $140???

Depending on what needs to be replaced he may have to get everything re-setup anyway. Especially if bearing replacement is involved. Its hard to speculate what needs to be done for sure until the cover is removed. If its leaking, hell it could just be a seal. I agree though, new gears are usually the way to go unless you know for a fact the previous ones were setup correctly.

[Curless]

Depending on what needs to be replaced he may have to get everything re-setup anyway. Especially if bearing replacement is involved. Its hard to speculate what needs to be done for sure until the cover is removed. If its leaking, hell it could just be a seal. I agree though, new gears are usually the way to go unless you know for a fact the previous ones were setup correctly.

Exactly my point. If you are not a tech with the means to do this job yourself DO NOT SKIMP! It costs too much to do over. There is nothing more annoying than a howling gear set...especially when its a new to you toy that you want to play with...but its broken and you have to do it over.

If he could go for a ride in the Mustang and hear the gears first that would help... sounds like he can't though.

[RoyLPita]

No this is not a good idea....what good will it do to have a center section out of another rear end??? You still have to buy the instal kit and reset your pinion depth and back lash...all that work, new bearings and crush sleeve and used gears???? to save how much??? If used gears are worth $50 - $100 why would you not buy new ones for $140???

Used gears have a very strong chance of gear whine at higher speeds.

[Blk04MM]

It would be a good buy for one with a Mustang. It may be an 8.8 but is pretty much where the similarities end.

Off subject... Are you up North or down South?



ok so all 8.8s ARENT the same. :shake: back to square one

and im North.

[Blk04MM]

Exactly my point. If you are not a tech with the means to do this job yourself DO NOT SKIMP! It costs too much to do over. There is nothing more annoying than a howling gear set...especially when its a new to you toy that you want to play with...but its broken and you have to do it over.

If he could go for a ride in the Mustang and hear the gears first that would help... sounds like he can't though.


i can go for a ride but nevermind. i'll look for a better replacement

[Blk04MM]

True, the axles/housing will not work for a Marauder. But the diff, diff guts, and 4.10's will carry over just fine.


im lookig for a full replacement... didnt know only the "chunk" would work.
thanks for the info.


so to be clear. if i find a 05+ crown vic rear end i can just drop mine and bolt the other right up?

[Curless]

ok so all 8.8s ARENT the same. :shake: back to square one

and im North.


No, the complete assemblies are not the same. Mustangs have different widths than other Mustangs, some are independent too.

[Vortech347]

So you need an entire rear end HOUSING ASSEMBLY, not just the 8.8. I don't think much has changed with panthers. However you'll want an MM one because it has 3.55's. Vic and GM's have 3.08's and 3.27's.

[Blk04MM]

So you need an entire rear end HOUSING ASSEMBLY, not just the 8.8. I don't think much has changed with panthers. However you'll want an MM one because it has 3.55's. Vic and GM's have 3.08's and 3.27's.


what im asking is if i find a COMPLETE FORD HOUSING ASSEMBLY 8.8 etc online with upgraded parts (gears clutches etc) do I ONLY look for a 05+ or? or will any year work?

worst come to worst i can buy axels, gears, rebuid kit and have it done.

im just lookig at all options right now.

[Vortech347]

No, you'd need one with 3.55's. I believe they only came in the Marauders. Which would narrow it to 03-04.

Do you know what is wrong with the one on the car now?

[RoyLPita]

I have a take out Mustang 31 spline differential available.

[Blk04MM]

No, you'd need one with 3.55's. I believe they only came in the Marauders. Which would narrow it to 03-04.

Do you know what is wrong with the one on the car now?


no i havent had it tore down yet. im just gathering info for a worst case that everything needs replacing. then i would know what to look for as a FULL replacement

[Blk04MM]

I have a take out Mustang 31 spline differential available.


pm a price please

[Blk04MM]

FINALLY got in touch with another friend with a shop. $300 labor for seals bearings & gear install with fluids etc. it'll be towed in this week and tore down to see whats needed and go from there. this is a headache.

now I need a tune for a 4.30 gear

[Curless]

Yep, your closest to Marty for a tune! Give him a call!

[Blk04MM]

Yep, your closest to Marty for a tune! Give him a call!


I called, didnt know they were that pricey. Original owner of my MM said the XCal was preloaded with a 4.10 tune already but :censor: I dont like that gear.

[Vortech347]

You should be able to change the axle values on the hand held.

[yjmud]

Even though you are not going to bree fast enough to need 31 splines I would do it since you said you doing a complete rebuild cheap insurance and the availability of cheaper differentials its better and if you get a wild hare up your a$$ it will handle it

[maineiac]

not to get a little off topic but what else needs to be done to switch from 28 spline to 31,i have all my 410 parts,but pretty sure axeles are bad,so should i use 31's

[fastblackmerc]

not to get a little off topic but what else needs to be done to switch from 28 spline to 31,i have all my 410 parts,but pretty sure axeles are bad,so should i use 31's

Axles, tone rings, axle seals, axle bearings, 31-spline carrier, rear end rebuild kit and fluid.

[Blk04MM]

You should be able to change the axle values on the hand held.

So just changing the value on the xcal will work? :confused:
I thought a actual full 4.30 file(tune) is the best way to get the performance out of the gear swap.

[Blk04MM]

Axles, tone rings, axle seals, axle bearings, 31-spline carrier, rear end rebuild kit and fluid.

I thought axel seals came in master rebuild kits

[yjmud]

Depends on the kit you buy a complete master normally does

[Blk04MM]

Depends on the kit you buy a complete master normally does

Ok. Thought so. That's good. Saved an extra purchase

[Blk04MM]

I'm thinking of NOT going 4.30s and stick to 4.10 since I have a free tune and use the money on a NO2 kit. Again I'm THINKING about it. I know my thoughts are all over the place.

IF I go NO2. Up to what shot can I spray without needed a tune?

[Blk04MM]

Anybody?

Sorry if its off topic

[yjmud]

Low buck runs nitrous but put it on a dyno to get the most

[Blk04MM]

Low buck runs nitrous but put it on a dyno to get the most

Ok thank you

[RoyLPita]

pm a price please

PM sent........