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Re: My 63" Chevy Spring Swap [Re: JWHnAtl] #574443 03/07/05 08:53 AM
Joined: Jan 2004
Posts: 912
TheBandit Offline OP
Rock Warrior
Thanks JWHnAtl. No I don't have ball joint spacers up front. It's a Trailmaster 4" lift, barely cranked up.


[color:"darkgreen"]1986 4Runner - 4" IFS - 63" Chevys - 33" ATs - 5.29s - Rear Detroit
Sliders - Kayline - Rebuilt 22RE - On Board Air AND Factory AC
www.xtremefabricator.com[/color]
From the Off-Road World
Re: My 63" Chevy Spring Swap [Re: seaflea] #574444 03/07/05 11:59 PM
Joined: Oct 2000
Posts: 669
D
dcg9381 Offline
Rock Warrior
I've done the same swap...
A couple of comments:

1) Running 44044s up front - the truck doesn't sit level:
[Linked Image]

2) You'll need to modify the parking break to clear the springs a bit:
[Linked Image]


3) I'm running a soft-ride 1.5in add-a-leaf.. It's almost level. Long shackles in back are good, but they're not enough to correct your pinion angle, you'll need to shim.. I believe I used 3 deg shims.


Very flexible.. cheap springs.. ride great.. notice overall length increase - new mount point is in front of old spring:

http://lakebox.dnsalias.com/photos/1981%20toyota/fabrication/med/DSC03577.JPG

d_ginther@hotmail.com


22REturbo.net




1988 4Runner
22RTE core, turbocharged, megasquirted...
Re: My 63" Chevy Spring Swap [Re: dcg9381] #574445 03/08/05 12:15 AM
Anonymous
Unregistered
**cough** Bob your bed **cough** <img src="/forums/images/graemlins/wink.gif" alt="" />

How did you modify the parking brake?

Re: My 63" Chevy Spring Swap [Re: TheBandit] #574446 03/08/05 12:21 AM
Anonymous
Unregistered
That's what we wanted to see. Nice work! It looks like you have the four leaf pack with the over load? If you take the over load off it'll ride a lot better, or at least mine did when I took the load spring out. Anyways, looks good, thanks for the pics.

Re: My 63" Chevy Spring Swap [Re: dcg9381] #574447 03/08/05 01:16 AM
Joined: Aug 2003
Posts: 2,854
G
Greg_Canada Offline
Roll Me Over
Quote
I've done the same swap...
A couple of comments:

1) Running 44044s up front - the truck doesn't sit level:
[Linked Image]

2) You'll need to modify the parking break to clear the springs a bit:
[Linked Image]


3) I'm running a soft-ride 1.5in add-a-leaf.. It's almost level. Long shackles in back are good, but they're not enough to correct your pinion angle, you'll need to shim.. I believe I used 3 deg shims.


Very flexible.. cheap springs.. ride great.. notice overall length increase - new mount point is in front of old spring:

http://lakebox.dnsalias.com/photos/1981%20toyota/fabrication/med/DSC03577.JPG

d_ginther@hotmail.com

That;s a CLEAN truck, i like it.


89 4Runner
3" BL, M/T locks, 33"bfg mt, bilstein, Kayline, tubebumper, toyotafiberglass panels
TBI: Elocker,3.4 w/ORS,b+b,S2Sstg2cams,arias pistons,P+P intake,TRDs/c,URDpullies+7th,downey headers,MAPECU2,WEGO WB, SupraMAF,walboro255,stg4clutch, EPaOo2 sim
Re: My 63" Chevy Spring Swap [Re: TheBandit] #574448 03/08/05 07:09 PM
Joined: May 2004
Posts: 13
E
extremesolo Offline
Need a Spot
I am planning on doing the swap on my 87 runner very soon. Do I need shims to correct the pinion angle or will I be okay without them? Also I was only planning a BJ spacer on the front with the IFS do you think I will be level or will the rear be too high with the 3 leaf chevy pack? Thanks, Andrew


1987 4Runner - 22RE, 290,000 miles 63" chevys, double shackle, BJ spacers, downey IFS truss, extended differential breathers, 33x10.50 BFG MT's. Soon to come - aussie locker in rear
Re: My 63" Chevy Spring Swap [Re: extremesolo] #574449 03/08/05 09:00 PM
Joined: Oct 2000
Posts: 669
D
dcg9381 Offline
Rock Warrior
I'm going to a flat bed, with some rear seats as soon as I can find the time and the motivation to do so.

The spring pack gets too tall, so the parking brake drags across it. It's not clear in the photo, but you need to extend the arm that is on the drum brake. I simply welded on to it and drilled a hole for the pin. I believe that someone actually makes an extension.


What you need to understand about doing ANY lift:

1) If you lift, you just changed your pinion angle. The rule that I've heard is for every inch up, you need to rotate the pinion by 1.5 degrees. The rear isn't as bad because the angles are not as extreme. A bad pinion angle in back will result in u-joints that wear more quickly and inefficient power transfer.. Not a big deal.

2) The front is more problematic because you can end up with a very bad (unusable) pinion angle. If you shim the front - you'll screw up your default caster, which is what keeps your truck stable on the road. Not enough caster and you'll "death wobble" - the truck will be highly unstable, not drivable, and dangerous on the road... To do the SAS right, you need to cut and rotate the ends of the axle (see pirate4x4) - to get your pinion angle correct.. you'll need to reweld the spring perches also. It's a pain...

I'd recommend not shimming the front - that way your pinion angle might be bad, but you're not going to death wobble. Jess (high angle driveline) can produce some driveshafts that work well, but they will vibrate quite a bit and not be smooth above about 20mph...

email me if you've got questions.

d_ginther@hotmail.com


22REturbo.net




1988 4Runner
22RTE core, turbocharged, megasquirted...
Re: My 63" Chevy Spring Swap [Re: extremesolo] #574450 03/08/05 10:52 PM
Joined: May 2003
Posts: 394
Runner-Man Offline
Mudrunner
I did the Chevy spring swap using a 3 spring + overload pack and took the overload out so I have no problems with the e-brake cable. I didn't have to shim, my pinion angle was right on the money (about 2 degrees off in the rear, so while under power it should be perfectly parallel with the transfer case). There is no driveline vibration.

At first I used a double shackle setup, but after everyone got me worried about using double shackles I switched to a single shackle using the existing rear shackle hanger. The shackle is pretty laid back, but the truck rides fine and flexes good.


'89 4Runner, 22RE. Chevy spring swap, 8,000 lb Warn winch, custom front and rear bumpers, e-locker rear. Saved by Grace.
Re: My 63" Chevy Spring Swap [Re: TheBandit] #574451 03/09/05 02:44 AM
Joined: Jan 2004
Posts: 912
TheBandit Offline OP
Rock Warrior
Careful... if people keep posting here we'll end up with the 4x4wire equivalent of the PBB FAQs <img src="/forums/images/graemlins/kewl.gif" alt="" />

My parking brake cable is at least 3/4" above the spring pack at flat ride height. I didn't take a close look at it while I was flex testing, but I'll go back and take a look soon.


[color:"darkgreen"]1986 4Runner - 4" IFS - 63" Chevys - 33" ATs - 5.29s - Rear Detroit
Sliders - Kayline - Rebuilt 22RE - On Board Air AND Factory AC
www.xtremefabricator.com[/color]
Re: My 63" Chevy Spring Swap [Re: TheBandit] #574452 05/17/05 01:18 AM
Joined: Jan 2004
Posts: 912
TheBandit Offline OP
Rock Warrior
Still loving this Chevy springs:

[Linked Image]

Never seen the IFS flex that much <img src="/forums/images/graemlins/zombie.gif" alt="" /> In the back I am rubbing right tire on compression and the passenger droops until the shackle goes 90. Shocks barely have enough compression travel. Extension is okay.

[Linked Image]

[Linked Image]


[color:"darkgreen"]1986 4Runner - 4" IFS - 63" Chevys - 33" ATs - 5.29s - Rear Detroit
Sliders - Kayline - Rebuilt 22RE - On Board Air AND Factory AC
www.xtremefabricator.com[/color]
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