Axle Swap on a 2wd - Ranger-Forums - The Ultimate Ford Ranger Resource


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Old 01-28-2009
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Axle Swap on a 2wd

Now I know very little about axle's and gear ratios and what all the difference between them is. I have a 2006 STX 2wd with the 3.slow v-6. I have a automatic transmission and a 7.5 rear axle with the 3.73 gears in it. I don't think it has Limited slip so i will say no. So heres the list of questions:

I am looking into swapping in a explorer axel with the rear disk brakes. I know i would need the axle and the parking brake lines. Is there anything I also need for this.

I am running a 4/5 drop on the Ranger right now so would i need to get different shocks for this or what?

Would changing the gears to a 3.55 change anything? Or should I just find some 3.73's with limited slip to go in the axle?

Or should I forget the disc brakes and just find a set of 3.73 gears with LS to put in my axle.

Thanks for any help possible.... Nick
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Old 01-28-2009
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a 3.73 l/s expo axle should be relatively easy to find..and basically you just the the complete rear end with brake and parking brake lines
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Old 01-28-2009
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Also without moving the spring perches and shock mounts I think the expo axle gives you like 5" of drop in the rear. Taknotes has one on his so he will know
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Old 01-28-2009
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mine i believe is somewhere b/t 4 and 5
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Old 01-28-2009
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well you could have spring under mount and it would work perfect
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Old 01-28-2009
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He would have to remove some of this drop parts though.
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Old 01-30-2009
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be careful

I've read on some how-to's and other threads about swapping out a drum brake rear end to a disc brake design here, which is an excellent mod, however.....
You are also going to change out the brake master cylinder for a rear disc setup as well
Drum brake masters have a residual check valve in them for the wheel cylinders, 4 wheel discs masters have no such valve
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Old 01-30-2009
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Thats good to know
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Old 01-30-2009
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Quote:
Originally Posted by jkl2455 View Post
I've read on some how-to's and other threads about swapping out a drum brake rear end to a disc brake design here, which is an excellent mod, however.....
You are also going to change out the brake master cylinder for a rear disc setup as well
Drum brake masters have a residual check valve in them for the wheel cylinders, 4 wheel discs masters have no such valve
I've never heard anyone doing this with the swap
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Old 01-30-2009
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what they change is the proportioning valve you can add a inline proportioning valve...


3.55 would give you better MPG and better freeway RPM but less get up and go off the line.

where as like 4.10 it would be better of the line but higher freeway RPM and less mpg..
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Old 01-30-2009
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Quote:
Originally Posted by jkl2455 View Post
I've read on some how-to's and other threads about swapping out a drum brake rear end to a disc brake design here, which is an excellent mod, however.....
You are also going to change out the brake master cylinder for a rear disc setup as well
Drum brake masters have a residual check valve in them for the wheel cylinders, 4 wheel discs masters have no such valve
I would say this is true on some models.

the rangers abs system can do all the proportioning on its own. no need to sway anything. now before 2001 models it was different.

2001+ will not require it unless you remove your ABS module.
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Old 01-30-2009
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Quote:
Originally Posted by Redneckstone View Post
what they change is the proportioning valve you can add a inline proportioning valve...


3.55 would give you better MPG and better freeway RPM but less get up and go off the line.

where as like 4.10 it would be better of the line but higher freeway RPM and less mpg..
to a point, you can bog the engine too much when running a numerically lower gear ratio which can cause the trans to hunt and burn more fuel.

3.73s or 4.10s would be a good choice.
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Old 01-30-2009
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Since I have the 3.73's already guess I should just find a LS to put in it? Can you purchase a LS to put in the 7.5 with 3.73's? Or do i have to update to the 8.8 rear end for a LS?
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Old 01-31-2009
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Anyone know if this set of gears would be able to be put in my 7.5 rear end? And how about this locker from PowerTrax? Any recommendations?

http://www.americanmuscle.com/mopepl...edium=Shopping


http://www.reiderracing.com/performancelocker.htm
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Old 01-31-2009
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this would be your best bet. all you would do is take the ring gear from your differential and bolt it to this...

http://cgi.ebay.com/ebaymotors/FORD-...QQcmdZViewItem
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Old 01-31-2009
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Will I still be able to have ABS with this??? And this would work well with the Stage 3 Transmission? Would I need to purchase a Tuner if I installed all this at one time?
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  #17  
Old 01-31-2009
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Anyone???? Trying to spend money this week to order parts....
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  #18  
Old 02-01-2009
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TTT.... anyone?
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Old 02-01-2009
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it has the abs reluctor ring pictured on it. remember, this isnt a bolt in type deal. someone will need to set up the gears for you (backlash, bearing pre-load, contact pattern etc)
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  #20  
Old 02-01-2009
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Rgr. I have a gear guy that will do this for me.... Guess i am going to go ahead and get the Ford Racing LS for the 3.73's.... Thanks all...
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  #21  
Old 02-01-2009
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check this site you can look at the invertory of the junk yard in your state and they giv prices to in it www.car-part.com
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