31 spline rear conversion where to get parts - Page 2 - Ranger-Forums - The Ultimate Ford Ranger Resource


Drivetrain Tech General discussion of drivetrain for the Ford Ranger.

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  #26  
Old 01-26-2006
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If your not in a hurry Ben, just keep an eye on what I'm doing with my Explorer rear. It will help you through getting it set up for a Ranger.
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  #27  
Old 01-26-2006
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Quote:
Originally Posted by fuze
Why not swap in the ABS assembly from the Explorer?
Because there is no reason to. It is the same unit as the Ranger.
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  #28  
Old 01-26-2006
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I thought he meant "ABS rear", lol -- I didn't think he was just talking about the ABS.
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  #29  
Old 01-26-2006
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Ah I see what he was saying (I hadn't read that one post). I believe Bob and Tom both have rear wheel discs that work absolutely fine WITHOUT bypassing anything.
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  #30  
Old 01-26-2006
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FWIW, my Level II 31-spline axle tag reads N313L 4L10 88 3E15.

As far as the the rear brakes go, there are potential problems with residual pressure valves when switching from drums to discs. Discs typically like 2~4 psi and drums use about 10psi to keep them "at the ready". So, small pressure sensitive check valves are installed, often at the master cylinder. These are not proportioning valves. They maintain residual pressure in the brake lines to keep the brakes correctly positioned for quick response and short pedal travel. Without them, you might need to pump the brakes before you get them to begin stopping the truck.

That's one of the reasons I chose the Cadillac calipers. According to the Intenet info (always highly reliable, LOL), the Caddy calipers work well with the 10 PSI residual valves already in place in a drum system. Supposedly, that's because they have self adjusters with internal return springs that front calipers lack. I can't dispute that because mine are working great and I didn't change anything anywhere but at the rear axle.

Some have said that it is necessary to change the master cylinder when switching a Ranger to Explorer discs. I couldn't say if that is true or not but it just might be. The Explorer doesn't have the parking brake/self adjuster in the caliper. The Ex p-brake is a separate small drum brake inside the disc hat.

My 2003 didn't need anything done to the proportioning valve because it doesn't have one. That function is handled by Electronic Brake Force Distribution in the ABS unit. I don't know if the 2000-back 4WABS option had that feature or if it used a mechanical proportioning valve. I don't have any shop manuals except 2002.
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  #31  
Old 01-26-2006
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Quote:
Originally Posted by rwenzing
Some have said that it is necessary to change the master cylinder when switching a Ranger to Explorer discs. I couldn't say if that is true or not but it just might be.
I didn't, and mine stops better than a stock ranger even with 38's...
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  #32  
Old 01-26-2006
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The explorer and ranger MC part number cross. I don't think there's any difference. The only difference is between 2 door and 4 door ex's primarily.
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  #33  
Old 01-26-2006
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Could be. Like I said, I have no experience with the Explorer swap.
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  #34  
Old 01-26-2006
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One thing to add about FX4/LII 31-spline axles is that there was a recall on the 2002 FX4 (the model that became the LII starting in 2003). The recall was for some part of the torsen diff assembly or housing. Ford, in their infinite wisdom, decided to only recall the FX4's equipped w/ manual transmissions. Those w/ autos were not recalled. Ford's solution to the recall was to swap out the entire axle, drum to drum for a redesigned part. Starting in 2003 all LII's got the new axles.

There is odles of info about this over at ORR. Dave of 'Dave and Julie' fame was supposedly one of the squeeky joints that got Ford to adress this issue. There is also a Torsen employee that is active over there. He has posted all kinds of interesting background to the issue.

This means that there were a bunch of 2002 FX4 31 spline axles running around.. even w/ the torsen in it. I speculate that these were being sold by dealers that had pulled them from recalled trucks. So if you're looking for or at a complete axle that came out of a 2002 truck, and interested in keeping the torsen, then beware: it may be one of these recalled/defective parts.

Now if you are looking to swap in another diff like John did, then it doesn't effect you at all. But I would suggest that this may be why John's axle came sans diff.
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  #35  
Old 01-26-2006
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SUPPOSEDLY, the improved 2002 Torsen replacement axle has a purple ID tag on it. If you find one of those or if the build date of the donor is about January/February, 2002 or later, then it SHOULD have the improved LSD. That's when the recall/stop sale took place.
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  #36  
Old 01-26-2006
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Quote:
Originally Posted by NHBubba
Now if you are looking to swap in another diff like John did, then it doesn't effect you at all. But I would suggest that this may be why John's axle came sans diff.
I do remember reading that's why John's axle came without the differential. Though if you're going to go to the trouble of finding that axle, you might as well go ahead and regear and get yourself a locker or L/S also!
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  #37  
Old 01-26-2006
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Exactly. That's what I did and it was worth the trouble (and it is a bit of trouble for an electrical guy like me, lol...)
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  #38  
Old 01-26-2006
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Quote:
Originally Posted by Gearhead61
I do remember reading that's why John's axle came without the differential. Though if you're going to go to the trouble of finding that axle, you might as well go ahead and regear and get yourself a locker or L/S also!
There are some that may find the Torsen desirable.. maybe even just for temporary use. (I can see it now: "Dude, I'll buy and install the axle.. then save up a few months and get a rockin' locker!") I just thought I'd mention the issue. I've tried to make a point of doing this on all FX4/31-spline discussions. We've had a few..
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  #39  
Old 01-27-2006
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Quote:
Originally Posted by NHBubba
There are some that may find the Torsen desirable.. maybe even just for temporary use. (I can see it now: "Dude, I'll buy and install the axle.. then save up a few months and get a rockin' locker!") I just thought I'd mention the issue. I've tried to make a point of doing this on all FX4/31-spline discussions. We've had a few..

ive got a new torsen from the factory getting installed in a explorer rear end, honestly ive never had a locker/ls before in my lift, and i wanted something in the explorer rear, and it was free to me, so why not....I was told them work good on automatics, but i dunno
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  #40  
Old 01-27-2006
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I like my torsen.. I dunno if it's the diff, the tires, or the 4x4, but my truck goes through snow like a hot knife through butter. My old 4x2 was hell in the snow. I can't say how much each component helps/hurts w/ that.. but I sure do like the whole package!
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  #41  
Old 01-30-2006
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Does anybody have an estimate or average cost to do this conversion ? What have you guys paid for the axels ?
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  #42  
Old 01-30-2006
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I found a 8.8 with 3.73 LS for sale around me. I wanted to upgrade to that from my stock 7.5 due to running bigger tires (35's). I just sent the guy an email asking if its 31 spline, it he does say its 31 spline, how will I be able to find out if its one of those recalled axle's? If it happens to be a 28 spline, it would still be worth it to upgrade from the 7.5 right?

Thanks,
Justin
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  #43  
Old 01-30-2006
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Quote:
Originally Posted by Ranger1
Does anybody have an estimate or average cost to do this conversion ? What have you guys paid for the axels ?
Depends what you do to it. Gears, Locker, Install Kit, Misc Parts, Labor to install Gears/Locker, Rotors/Drums, Pads/Shoes, Your looking over a grand easy...
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  #44  
Old 01-30-2006
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i can get complete drum to drum axles at the junk yard around here and by my property in tenn for $150 all day long...not hard to find
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  #45  
Old 01-31-2006
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zach if you find an FX4 then let me know
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  #46  
Old 01-31-2006
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Quote:
Originally Posted by jbjustin33415
I found a 8.8 with 3.73 LS for sale around me. I wanted to upgrade to that from my stock 7.5 due to running bigger tires (35's). I just sent the guy an email asking if its 31 spline, it he does say its 31 spline, how will I be able to find out if its one of those recalled axle's? If it happens to be a 28 spline, it would still be worth it to upgrade from the 7.5 right?

Thanks,
Justin
yea even if it is a 28 spline it would be worth the swap. the 7.5 is weak and wouldn't handle the 35's well. the 28 spline would handle the 35's good. call a ford dealer and ask them how to tell if it is a recalled axle. they will be able to tell you if it is or not. if it is then install it in your truck, and take it back to a dealer and let them fix whatever is wrong with it. or i bet you could just take the axle to the dealer without being in a truck and they will fix it.
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  #47  
Old 01-31-2006
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the recalled axle isnt going to have 3.73s in it. im pretty sure they will only have 4.10s.
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  #48  
Old 01-31-2006
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If you could use a 31-spline Explorer axle with discs, there is a guy from CT selling an axle on ORR: http://www.offroadrangers.com/forums...ad.php?t=22445
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  #49  
Old 01-31-2006
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Quote:
Originally Posted by Redneckstone
i can get complete drum to drum axles at the junk yard around here and by my property in tenn for $150 all day long...not hard to find
If you can get a FX4 L2 31 spline drum axel for $150 I will come get it !
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  #50  
Old 02-07-2006
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I contacted the guy over ORR he's asking only $300 for a complet axel with discs.

Whats the story with the disc conversion ? What does it have to have or not have abs or something ? What do i need to do to the truck to make it work ?

Or

Could I take that disc axel and convert it to drum ?
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