formula for figuring out what gears you have

BIG RON · 05-18-2006, 07:46 PM

What is the formula for figuring out what gears you have? with out droping the 3rd members.

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snap-on · 05-18-2006, 08:37 PM

its on the door pannel sticker.

if its been swaped, well you have 2 options. count the times to spin the drive shaft for 1 turn of a wheel. or vise versa

BIG RON · 05-18-2006, 08:47 PM

what if the truck was regeard.

marko3xl3 · 05-18-2006, 08:49 PM

Quote:

Originally Posted by BIG RON

what if the truck was regeard.

He tells you...

Have somebody you trust your life to slowly move the car, and count how many times the driveshaft spins with one revolution of the wheel.

BIG RON · 05-18-2006, 09:01 PM

:pat: :pat: did'nt see that I'v been

BIG RON · 05-18-2006, 09:12 PM

Did it, about 2 1/2 revs. in the rear and about 2 1/4 revs. in the front. Whats the gearing?

eric-the-red · 05-19-2006, 08:30 AM

Quote:

Originally Posted by BIG RON

Did it, about 2 1/2 revs. in the rear and about 2 1/4 revs. in the front. Whats the gearing?

That doesn't sound right, it should be around 4 - 4.5 or so. And front and rear should be the same. Instead of risking getting run over try this method. With the tranny in neutral, jack up one wheel, turn it exactly 2 revs and count the drive shaft turns. If you do the front you'll have to have it in 4wd, if you have ADD.

And if the front and rear aren't the same don't use 4wd until you get them matched.

AH64ID · 05-19-2006, 08:48 AM

The other option is similar, but doesn't require moving.

If you have a NON ADD rig you can lock one hub, have the truck in 2wd and spin the front drive shaft and see how many times it takes to get the CV to spin once.

You can also firgure it out by RPM in 4th(5spd) gear at say 50 miles per hour, but you will have to know the rolling radius of your tire.

BIG RON · 05-19-2006, 05:17 PM

dumb question, what is (ADD)?

tc · 05-19-2006, 06:18 PM

Automatic Disconnecting Differential

It's a vacuum operated solenoid that disengages the passenger side axle from the diff.

There is not really anything as "ADD hubs" - there's a splined plate that locks the hub to the CV axle constantly, so as long as the truck is moving, the front drivetrain is all spinning

BIG RON · 05-19-2006, 09:07 PM

how would I know if my front diff is (ADD) ?

snap-on · 05-19-2006, 09:19 PM

this would go a lot better if you searched a wee bit.

faceing the front of the truck look under it. if you see this big thing attached to the drivers side of the diff with wires and hoses comming from it that looks like the pic in the box that says w/ADD

well then you have ADD

BIG RON · 05-19-2006, 09:28 PM

Sorry, I was just a little confused. My truck is a solid axle. Thanks for all the help everyone

AH64ID · 05-20-2006, 08:06 AM

Well if its a SFA you can't do what I meantioned anyhow, cant see the birfields turn

BTW: What is your truck?

BIG RON · 05-20-2006, 08:30 AM

1980 toyota.....

05-18-2006, 08:37 PM	#2 (permalink)
snap-on Registered User Join Date: Aug 2005 Location: STL MO Posts: 2,382	its on the door pannel sticker. if its been swaped, well you have 2 options. count the times to spin the drive shaft for 1 turn of a wheel. or vise versa __________________ 94 EX cab, 5speed, V6, locked, ARB bar, NWOR headers 92 4runner, auto, V6, OME suspension, Downey headers

05-18-2006, 08:47 PM	#3 (permalink)
BIG RON Registered User Join Date: Nov 2005 Location: Rancho Cucamonga Posts: 175	what if the truck was regeard. __________________ Concrete is the cancer of our land,just give me dirt...

05-18-2006, 09:01 PM	#5 (permalink)
BIG RON Registered User Join Date: Nov 2005 Location: Rancho Cucamonga Posts: 175	:pat: :pat: did'nt see that I'v been __________________ Concrete is the cancer of our land,just give me dirt...

05-18-2006, 09:12 PM	#6 (permalink)
BIG RON Registered User Join Date: Nov 2005 Location: Rancho Cucamonga Posts: 175	Did it, about 2 1/2 revs. in the rear and about 2 1/4 revs. in the front. Whats the gearing? __________________ Concrete is the cancer of our land,just give me dirt...

05-19-2006, 08:48 AM	#8 (permalink)
AH64ID Contributing Member Join Date: Dec 2002 Location: Idaho Posts: 4,638	The other option is similar, but doesn't require moving. If you have a NON ADD rig you can lock one hub, have the truck in 2wd and spin the front drive shaft and see how many times it takes to get the CV to spin once. You can also firgure it out by RPM in 4th(5spd) gear at say 50 miles per hour, but you will have to know the rolling radius of your tire. __________________ -John '05 Dodge 3500 SRW 4x4 SLT 5.9 Cummins QC LB NV5600 2003 SR5 4Runner, V6 4WD. 1" cornfed lift Previous Toyota's '92 Red Truck NALA Speed doesn't kill, its the sudden stop that hurts.

05-19-2006, 05:17 PM	#9 (permalink)
BIG RON Registered User Join Date: Nov 2005 Location: Rancho Cucamonga Posts: 175	dumb question, what is (ADD)? __________________ Concrete is the cancer of our land,just give me dirt...

05-19-2006, 06:18 PM	#10 (permalink)
tc Contributing Member Join Date: Nov 2005 Location: Longmont, CO Posts: 8,377	Automatic Disconnecting Differential It's a vacuum operated solenoid that disengages the passenger side axle from the diff. There is not really anything as "ADD hubs" - there's a splined plate that locks the hub to the CV axle constantly, so as long as the truck is moving, the front drivetrain is all spinning __________________ Check out www.coTTORA.org to hook up with great Toyota 'wheelin' folks! Current - 93 4Runner: 3VZ 33"x10.50" no lift ARB F/R 96 Impala SS: My own personal cop car Previous - 89 2WD Pickup 22R, Fabtech "Ivan Dan" lift, 31x10.50, IASCA World Finals 4th Place Stop with the mods and get on the trail! Pix at www.4wheelingoh.shutterfly.com/action

05-19-2006, 09:07 PM	#11 (permalink)
BIG RON Registered User Join Date: Nov 2005 Location: Rancho Cucamonga Posts: 175	how would I know if my front diff is (ADD) ? __________________ Concrete is the cancer of our land,just give me dirt...

05-19-2006, 09:19 PM	#12 (permalink)
snap-on Registered User Join Date: Aug 2005 Location: STL MO Posts: 2,382	this would go a lot better if you searched a wee bit. faceing the front of the truck look under it. if you see this big thing attached to the drivers side of the diff with wires and hoses comming from it that looks like the pic in the box that says w/ADD well then you have ADD __________________ 94 EX cab, 5speed, V6, locked, ARB bar, NWOR headers 92 4runner, auto, V6, OME suspension, Downey headers

05-19-2006, 09:28 PM	#13 (permalink)
BIG RON Registered User Join Date: Nov 2005 Location: Rancho Cucamonga Posts: 175	Sorry, I was just a little confused. My truck is a solid axle. Thanks for all the help everyone __________________ Concrete is the cancer of our land,just give me dirt...

05-20-2006, 08:06 AM	#14 (permalink)
AH64ID Contributing Member Join Date: Dec 2002 Location: Idaho Posts: 4,638	Well if its a SFA you can't do what I meantioned anyhow, cant see the birfields turn BTW: What is your truck? __________________ -John '05 Dodge 3500 SRW 4x4 SLT 5.9 Cummins QC LB NV5600 2003 SR5 4Runner, V6 4WD. 1" cornfed lift Previous Toyota's '92 Red Truck NALA Speed doesn't kill, its the sudden stop that hurts.

05-20-2006, 08:30 AM	#15 (permalink)
BIG RON Registered User Join Date: Nov 2005 Location: Rancho Cucamonga Posts: 175	1980 toyota..... __________________ Concrete is the cancer of our land,just give me dirt...

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