How Far Can You Extend an FJ40 Rear Axle? - Pirate4x4.Com : 4x4 and Off-Road Forum
 
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Old 05-02-2005, 09:51 AM   #1 (permalink)
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How Far Can You Extend an FJ40 Rear Axle?

Knowing that you would be cutting your wheelwells, moving your springs' rear attachment points, moving shock mounts, and lengthening your rear driveshaft, how far can you extend the rear axle in an FJ40? Would there be any drawbacks to moving it 10", assuming you have room to move the rear shackle back? This would be using longer springs with a centered pin hole. What springs would fit?
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Old 05-02-2005, 10:01 AM   #2 (permalink)
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i'm running chevy axles and chevy springs but figure if your soa its all the same. the reason i went chevy springs is cause if you move the front spring perch back you run into the frame being higher at that point. i used the factory front locations and just put the rear perches under my new bumper
i believe my springs pushed me back near 7" i dont have a measurement for them but there rear springs out of a early 80's half ton.

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Old 05-02-2005, 10:11 AM   #3 (permalink)
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With my axle in the center spring perch hole with XJ springs Iím at about 103-104" wheel base. This is with a SR flipped cruiser spring with front mount pushed .5" of the front of the frame in the front. I'm trying to remember the numbers, but I think the Xj spring's long side is 8 or 9 inches longer than a cruiser short side. I can also get another 1.5" in the back if I put the axle in the rear most perch hole. I currently use the forward-most hole in the perch; this gives me around a 102 WB.

As far as issues are concerned, everything seems to line up very well. I was able to reuse the frame shock mounts and just put tabs on the front of the axle. These mounts don't allow for a long enough shock for these springs however. The springs stick out beyond the frame in the back. My mounts are close to being flush with the back of the hole, I just put a bolt in the forward most holes on the mount and put it through the rearmost hole on the frame and welded it up, this made sure I was the same side to side.
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Old 05-02-2005, 10:16 AM   #4 (permalink)
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I'd like to see some pictures, if available.
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Old 05-02-2005, 10:21 AM   #5 (permalink)
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Quote:
Originally Posted by Vortec_Cruiser
I'd like to see some pictures, if available.

mine are posted already
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Old 05-02-2005, 10:49 AM   #6 (permalink)
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11" is easy...
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YOU'VE REQUESTED THE LARGE RED VIBRATOR AS FEATURED ON OUR WALL DISPLAY.

PLEASE SELECT ANOTHER ITEM.

THAT'S OUR FIRE EXTINGUISHER
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Old 05-02-2005, 11:41 AM   #7 (permalink)
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Quote:
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11" is easy...
So is increasing your post count. Let's see some pics and verbage.
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Old 05-02-2005, 11:42 AM   #8 (permalink)
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where?

Quote:
Originally Posted by ironpig70
mine are posted already
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Old 05-02-2005, 11:43 AM   #9 (permalink)
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Quote:
Originally Posted by ironpig70
mine are posted already
Thanks, but where
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Old 05-02-2005, 01:00 PM   #10 (permalink)
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this will give a nice side shot of how i hung my springs
here the front hanger is the original hanger. and i turned the rear around backwards.
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Old 05-02-2005, 02:37 PM   #11 (permalink)
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Quote:
Originally Posted by Vortec_Cruiser
So is increasing your post count. Let's see some pics and verbage.
Since you asked so nicely...





No....
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Old 05-02-2005, 07:10 PM   #12 (permalink)
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check out my thread, i got 106 or so out of mine, w/ flipped springs and moving shit around....its not to bad
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Old 05-02-2005, 07:20 PM   #13 (permalink)
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here is a pic



more in my thread
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Old 05-02-2005, 07:22 PM   #14 (permalink)
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Quote:
Originally Posted by Vortec_Cruiser
So is increasing your post count. Let's see some pics and verbage.
Not a real good way to solicit help...
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Old 05-02-2005, 07:40 PM   #15 (permalink)
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With everyone chasing after wheelbase like we are- I would be awesome if there were more Fj43's in the market. I think I have only seen one- ever.

With my front springs flipped and my 55's in the back and my perch offset a tad, I am eeking 101 or 102.

-Dustin
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Old 05-02-2005, 10:53 PM   #16 (permalink)
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Quote:
Originally Posted by Rascal
Not a real good way to solicit help...
He had nothing to offer, so nothing was lost.
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Old 05-03-2005, 07:34 AM   #17 (permalink)
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Quote:
Originally Posted by Vortec_Cruiser
He had nothing to offer, so nothing was lost.
lol

Really???

Okay, whatever you say..

BTW, when I posted that I was not at my computer where I store all my pics. So I had no good way to post the pics of what I did. Course, I don't have anything to offer so..
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Old 05-03-2005, 06:54 PM   #18 (permalink)
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XJ springs in the back and fronts flipped......
Attached Images
  
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Old 05-04-2005, 06:19 AM   #19 (permalink)
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Axle Move

Ed,

What kind of w/b are you looking for? I'll be at the shop tonight from 4:30 or so till? Feel free to stop by and see what I have done.

Sorry...no pictures to share.
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Old 05-04-2005, 06:52 AM   #20 (permalink)
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Ed,

Here are some pics of mine, the WB is 101".

http://community.webshots.com/user/rokkod

Tony
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Old 05-04-2005, 04:33 PM   #21 (permalink)
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Quote:
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Ed,

Here are some pics of mine, the WB is 101".

http://community.webshots.com/user/rokkod

Tony
Looks good! What springs are you using in the back?
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Old 05-04-2005, 06:52 PM   #22 (permalink)
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I am running 60 series springs. I am taking them to Deaver Spring to get reworked.

Are you going to the So. Cal. meeting on Sunday?

Tony
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