How Far Can You Extend an FJ40 Rear Axle? - Pirate4x4.Com : 4x4 and Off-Road Forum

Vortec_Cruiser · 05-02-2005, 09:51 AM

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?

ironpig70 · 05-02-2005, 10:01 AM

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.

bustanutley · 05-02-2005, 10:11 AM

With my axle in the center spring perch hole with XJ springs I’m 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.

Vortec_Cruiser · 05-02-2005, 10:16 AM

I'd like to see some pictures, if available.

ironpig70 · 05-02-2005, 10:21 AM

Quote:

Originally Posted by Vortec_Cruiser

I'd like to see some pictures, if available.

mine are posted already

Jason M · 05-02-2005, 10:49 AM

11" is easy...

Vortec_Cruiser · 05-02-2005, 11:41 AM

Quote:

Originally Posted by Jason M

11" is easy...

So is increasing your post count. Let's see some pics and verbage.

PARANOID56 · 05-02-2005, 11:42 AM

where?

Quote:

Originally Posted by ironpig70

mine are posted already

Vortec_Cruiser · 05-02-2005, 11:43 AM

Quote:

Originally Posted by ironpig70

mine are posted already

Thanks, but where

ironpig70 · 05-02-2005, 01:00 PM

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.

Jason M · 05-02-2005, 02:37 PM

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....

Halogrinder · 05-02-2005, 07:10 PM

check out my thread, i got 106 or so out of mine, w/ flipped springs and moving shit around....its not to bad

bustanutley · 05-02-2005, 07:20 PM

here is a pic

more in my thread

Rascal · 05-02-2005, 07:22 PM

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...

Rockzar · 05-02-2005, 07:40 PM

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

Vortec_Cruiser · 05-02-2005, 10:53 PM

Quote:

Originally Posted by Rascal

Not a real good way to solicit help...

He had nothing to offer, so nothing was lost.

Jason M · 05-03-2005, 07:34 AM

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..

74_Chevota · 05-03-2005, 06:54 PM

XJ springs in the back and fronts flipped......

dallen341 · 05-04-2005, 06:19 AM

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.

Rockcod · 05-04-2005, 06:52 AM

Ed,

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

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

Tony

Vortec_Cruiser · 05-04-2005, 04:33 PM

Quote:

Originally Posted by Rockcod

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?

Rockcod · 05-04-2005, 06:52 PM

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

05-02-2005, 09:51 AM	#1 (permalink)
Vortec_Cruiser Registered User Join Date: Feb 2003 Member # 17300 Location: So. California Posts: 2,405	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? __________________ Ed Gilbert 1977 FJ40, 5.7L Vortec F-Toy #F006 build in-progress [email]vorteccruiser@charter.net[/email]

05-02-2005, 10:01 AM	#2 (permalink)
ironpig70 Registered User Join Date: Sep 2001 Member # 6957 Posts: 4,250	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. Last edited by ironpig70; 05-02-2005 at 10:02 AM.

05-02-2005, 10:11 AM	#3 (permalink)
bustanutley Registered User Join Date: Oct 2003 Member # 23362 Location: denvah Posts: 458	With my axle in the center spring perch hole with XJ springs I’m 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. __________________ FJ40

05-02-2005, 10:16 AM	#4 (permalink)
Vortec_Cruiser Registered User Join Date: Feb 2003 Member # 17300 Location: So. California Posts: 2,405	I'd like to see some pictures, if available. __________________ Ed Gilbert 1977 FJ40, 5.7L Vortec F-Toy #F006 build in-progress [email]vorteccruiser@charter.net[/email]

05-02-2005, 10:49 AM	#6 (permalink)
Jason M Registered User Join Date: Jun 2001 Member # 5286 Location: Vegas Posts: 9,827	11" is easy... __________________ DEAR MADAM: THANK YOU FOR YOUR RECENT ORDER FROM OUR SEX TOYS WEBSITE. YOU'VE REQUESTED THE LARGE RED VIBRATOR AS FEATURED ON OUR WALL DISPLAY. PLEASE SELECT ANOTHER ITEM. THAT'S OUR FIRE EXTINGUISHER

05-02-2005, 01:00 PM	#10 (permalink)
ironpig70 Registered User Join Date: Sep 2001 Member # 6957 Posts: 4,250	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.

05-02-2005, 07:10 PM	#12 (permalink)
Halogrinder Moderhater Join Date: Feb 2003 Member # 16980 Location: h-town Posts: 11,312	check out my thread, i got 106 or so out of mine, w/ flipped springs and moving shit around....its not to bad __________________ Im your BMW huckleberry https://www.facebook.com/BMWdoctor can you do me a favor and like/share my page? If you like/share, you get free washes/discounts/other neat stuff for you car! gun facts that will blow your mind: http://www.gunfacts.info/pdfs/gun-fa...6_1_screen.pdf

05-02-2005, 07:20 PM	#13 (permalink)
bustanutley Registered User Join Date: Oct 2003 Member # 23362 Location: denvah Posts: 458	here is a pic more in my thread __________________ FJ40

05-02-2005, 07:40 PM	#15 (permalink)
Rockzar Registered User Join Date: Dec 2003 Member # 25622 Location: In the fog, Half Moon Bay, CA Posts: 2,045	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 __________________ 4Runner/ 325i / crf 50 / ttr 125 / wrf 450 / V-Star 650

05-03-2005, 06:54 PM	#18 (permalink)
74_Chevota Registered User Join Date: Jul 2002 Member # 12991 Location: Boone/Charlotte, NC Posts: 2,447	XJ springs in the back and fronts flipped...... Attached Images __________________ 11' Go-fast buggy:5.3L-TH350-Atlas 3.0-bypasses

05-04-2005, 06:19 AM	#19 (permalink)
dallen341 Registered User Join Date: Dec 2000 Member # 2574 Location: Claremont, CA Posts: 168	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.

05-04-2005, 06:52 AM	#20 (permalink)
Rockcod Registered User Join Date: Jul 2002 Member # 13040 Location: Buena Park,Ca Posts: 119	Ed, Here are some pics of mine, the WB is 101". http://community.webshots.com/user/rokkod Tony

05-04-2005, 06:52 PM	#22 (permalink)
Rockcod Registered User Join Date: Jul 2002 Member # 13040 Location: Buena Park,Ca Posts: 119	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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