front driveshaft spinning question - TTORA Forum
 
LinkBack Thread Tools Display Modes
post #1 of 13 (permalink) Old 05-16-2005, 11:12 AM Thread Starter
Member
 
punkigor's Avatar
 
Join Date: Feb 2005
Location: Providence, RI
Posts: 59
Question front driveshaft spinning question

Ok, i know in the ADD tacomas the front cv shafts are always spinning but are only powered when you're in 4x4 (so they're free-spinning the rest of the time). is the front driveshaft always free-spinning too (and powered only when you put on 4x4), or does it only start spinning when you turn on 4x4?

i'm trying to isolate a noise up front and am wondering if it can be from the front driveshaft & u-joint. if they don't spin unless the truck is in 4x4 then they can't be the source of the noise since i'm driving around in 2hi regularly. Thanks
punkigor is offline  
Sponsored Links
Advertisement
 
post #2 of 13 (permalink) Old 05-16-2005, 11:22 AM
Retired
 
AK98Taco's Avatar
 
Join Date: Dec 2004
Location: Utard
Posts: 4,641
If you have a V6 truck your t-case is gear driven and the front driveshaft can be disengaged, but I don't know if you can do that with your stock shifter.

Four-cylinder trucks have a chain-driven transfer case and the front driveshaft is always going to be spinning.

-Thomas

I love to buy my parts from TRDParts4U.com

Last edited by AK98Taco; 05-16-2005 at 11:25 AM.
AK98Taco is offline  
post #3 of 13 (permalink) Old 05-16-2005, 12:03 PM
Member Dismemberer
 
ShowStop's Avatar
 
Join Date: Dec 2004
Location: SoCal
Posts: 17,467
Garage
Send a message via Yahoo to ShowStop
Quote:
Originally Posted by punkigor
Ok, i know in the ADD tacomas the front cv shafts are always spinning but are only powered when you're in 4x4 (so they're free-spinning the rest of the time). is the front driveshaft always free-spinning too (and powered only when you put on 4x4), or does it only start spinning when you turn on 4x4?

i'm trying to isolate a noise up front and am wondering if it can be from the front driveshaft & u-joint. if they don't spin unless the truck is in 4x4 then they can't be the source of the noise since i'm driving around in 2hi regularly. Thanks
Your front driveshaft should not spin if you are not in 4wd and/or if your hubs are unlocked.

Next Socal TTORA event - Big Bear - Aug 13-14
www.ttora-socal.com
SoCal TTORA on Facebook
ShowStop is offline  
post #4 of 13 (permalink) Old 05-16-2005, 12:08 PM
Member Dismemberer
 
ShowStop's Avatar
 
Join Date: Dec 2004
Location: SoCal
Posts: 17,467
Garage
Send a message via Yahoo to ShowStop
Quote:
Originally Posted by AK98Taco
If you have a V6 truck your t-case is gear driven and the front driveshaft can be disengaged, but I don't know if you can do that with your stock shifter.

Four-cylinder trucks have a chain-driven transfer case and the front driveshaft is always going to be spinning.
Whoa...you need to get your facts straight. ALL Tacoma transfer cases are chain driven, regardless of engine or transmission type. Also, the front driveshaft should only spin if the transfer is in 4wd or the hubs are locked.

Next Socal TTORA event - Big Bear - Aug 13-14
www.ttora-socal.com
SoCal TTORA on Facebook
ShowStop is offline  
post #5 of 13 (permalink) Old 05-16-2005, 12:49 PM Thread Starter
Member
 
punkigor's Avatar
 
Join Date: Feb 2005
Location: Providence, RI
Posts: 59
Quote:
Originally Posted by ShowStop
Whoa...you need to get your facts straight. ALL Tacoma transfer cases are chain driven, regardless of engine or transmission type. Also, the front driveshaft should only spin if the transfer is in 4wd or the hubs are locked.
what about trucks with Automatic Disconnect? my hubs are always "locked" and the CVs always spin since i have the auto-disconnect, not manual hubs.
punkigor is offline  
post #6 of 13 (permalink) Old 05-16-2005, 01:01 PM
Member Dismemberer
 
ShowStop's Avatar
 
Join Date: Dec 2004
Location: SoCal
Posts: 17,467
Garage
Send a message via Yahoo to ShowStop
Quote:
Originally Posted by punkigor
what about trucks with Automatic Disconnect? my hubs are always "locked" and the CVs always spin since i have the auto-disconnect, not manual hubs.
Yes, your CVs will always spin, but the ADD will disconnect the passenger side CV inside the diff, so the spider gears in the diff will spin, but thats it.

Next Socal TTORA event - Big Bear - Aug 13-14
www.ttora-socal.com
SoCal TTORA on Facebook
ShowStop is offline  
post #7 of 13 (permalink) Old 05-16-2005, 02:02 PM Thread Starter
Member
 
punkigor's Avatar
 
Join Date: Feb 2005
Location: Providence, RI
Posts: 59
cool. thanks.
punkigor is offline  
post #8 of 13 (permalink) Old 05-16-2005, 04:34 PM
Retired
 
AK98Taco's Avatar
 
Join Date: Dec 2004
Location: Utard
Posts: 4,641
Quote:
Originally Posted by ShowStop
Whoa...you need to get your facts straight. ALL Tacoma transfer cases are chain driven, regardless of engine or transmission type. Also, the front driveshaft should only spin if the transfer is in 4wd or the hubs are locked.
You're right on the chain-drive.

On A.D.D. trucks, it looks like the front output shaft is engaged by a motor and clutch on the driven sprocket. The description of operation is difficult to understand, but I think the 4wd selector on the t-case shifter (if equipped) instructs the actuator to engage the front driveshaft.

I know that on my truck, which does not have the A.D.D. system, boths shafts are always spinning, as only the t-case shifter controls them. All I can do with my twin-stick is move the range shift rail and the 2wd/4wd shift rail, but I cannot disengage the front driveshaft.

-Thomas

I love to buy my parts from TRDParts4U.com
AK98Taco is offline  
post #9 of 13 (permalink) Old 05-16-2005, 05:24 PM
Member Dismemberer
 
ShowStop's Avatar
 
Join Date: Dec 2004
Location: SoCal
Posts: 17,467
Garage
Send a message via Yahoo to ShowStop
Quote:
Originally Posted by AK98Taco
On A.D.D. trucks, it looks like the front output shaft is engaged by a motor and clutch on the driven sprocket.
Only on newer models that have the push button 4wd. The older models with the traditional shift lever still had to shift to 4wd.

Next Socal TTORA event - Big Bear - Aug 13-14
www.ttora-socal.com
SoCal TTORA on Facebook
ShowStop is offline  
post #10 of 13 (permalink) Old 05-16-2005, 07:21 PM
Retired
 
AK98Taco's Avatar
 
Join Date: Dec 2004
Location: Utard
Posts: 4,641
The diagram I saw of the shift lever showed the L-N-H positions on the shift knob and the 4wd button on the side of the knob.

-Thomas

I love to buy my parts from TRDParts4U.com
AK98Taco is offline  
post #11 of 13 (permalink) Old 05-18-2005, 05:20 PM
Veteran Member
 
Join Date: Dec 2004
Location: NorCal, south-bay.
Posts: 924
Quote:
Originally Posted by AK98Taco
...I know that on my truck, which does not have the A.D.D. system, boths shafts are always spinning, as only the t-case shifter controls them. All I can do with my twin-stick is move the range shift rail and the 2wd/4wd shift rail, but I cannot disengage the front driveshaft.
I don't know what you have done with your twin-stick, but it seems likely to me that one of the shifters (the 2/4 one) should disconnect the front drivetrain at the t-case (like the t-case originaly could with one stick), and the manual hubs (which you presumably have) should disconnect it at the wheel end. So you should be able to get the front driveshaft free to not spin.

Perhaps you have put together some unusual combination, maybe you formerly had ADD and didn't switch to manual hubs because you twin-sticked it, or perhaps you had a brain-fart and forgot that the t-case could disconnect the front driveshaft.
not2XS is offline  
post #12 of 13 (permalink) Old 05-18-2005, 08:57 PM
Retired
 
AK98Taco's Avatar
 
Join Date: Dec 2004
Location: Utard
Posts: 4,641
Neither. My truck came with manual hubs when I bought it, and I assume it came that way from the factory.

I pulled the transmission and t-case to replace a clutch. At the same time, I installed the twin stick. I modified the range shift rail so that it would not overlap with the 4wd shift rail. I played with the t-case before and after the modification.

Maybe it didn't work right, but that's what it does.

http://www.frontrangeoffroadfab.com/twinstick.htm
http://www.marlincrawler.com/twinshifter.html

-Thomas

I love to buy my parts from TRDParts4U.com
AK98Taco is offline  
post #13 of 13 (permalink) Old 06-18-2005, 02:14 PM
Senior Member
 
NUKE's Avatar
 
Join Date: Oct 2004
Posts: 400
Quote:
Originally Posted by AK98Taco
If you have a V6 truck your t-case is gear driven and the front driveshaft can be disengaged, but I don't know if you can do that with your stock shifter.

Four-cylinder trucks have a chain-driven transfer case and the front driveshaft is always going to be spinning.
Both cases are chain driven and in both instances the driveshaft only spins when in 4WD.


LIBERATE TU TEMET EX INFERIS
NUKE is offline  
Reply

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the TTORA Forum forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:
OR

Log-in









Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.



Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode



Posting Rules  
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome