Explain 2g AWD Drivetrain

[Ppayer38]

Been looking around and trying to find some info or somebody to explain how are drivetrain works?
This is a real newbie question I know but gotta learn somehow on things I dont know

Im asking this question because I bought a car that was not running and sat for about a year... I got it all together and running and figured id drive it for a couple hundred miles before I swapped all drivetrain fluids but noticed that the rear wheels chirp in slower turns specially when there tight turn.. Wasnt sure if it was a welded center diff or maybe a welded rear diff? Any insite on this and explaination on the 2g AWD drivetrain woul be great!

Thanks,
Josh

 

[crusada]

I would first check the transfer case it could be an issue with that

 

[rlacasse1]

I'm wondering the same thing.

From search I have found that it's possible to start chirping with a welded center diff.

 

[Ppayer38]

Well I guess let me narrow it down as far as my question on the drivetrain...
I know how the VC works
I know how spider gears work
Do our rear ends have spider gears as well?
Just a little confused to be honest maybe im just missing something simple that ties it all together...

I dont mind a Welded center diff just wanna find out if its a problem or what the previous owner did.
How would I check the Xcase as im new to drivetrain diag haha

 

[mike96]

Well I guess let me narrow it down as far as my question on the drivetrain...
I know how the VC works
I know how spider gears work
Do our rear ends have spider gears as well?
Just a little confused to be honest maybe im just missing something simple that ties it all together...

I dont mind a Welded center diff just wanna find out if its a problem or what the previous owner did.
How would I check the Xcase as im new to drivetrain diag haha

yes and no, they come either with an open diff rear end (which are the ones with spider gears) or an LSD rear end. i haven't driven an AWD DSM yet so i don't know for sure but from my experience with my Subi i can tell you that normally when you lock the center diff (which would be the same at having a DSM center diff welded) it doesn't cause the tires to chirp but makes it feel like the car is trying to pull 4000 pounds when taking a slow sharp turn. it drags it down really hard. most of the cars i have seen that suffer from tire chirp in corners are ones that have had the rear diff welded or had a Spool installed for drag racing /off roading.

 

[Ppayer38]

It deffinetly feels like it is dragging 4000lbs when slow cornering or even in reverse backing out of the driveway haha
Just need to track down what it is now that is cause this problem but it does chirp/bind the rear end up when slow cornering or anything along those means... Looks like ill be pulling the rear sover off to see what kinda of rear diff I have and if it is welded and go from there in a week or so

*Will update thread as I go to figure this out just in case people have the same issue or questions

 

[Tanro]

My 91 chirps and drags during slow cornering. But generally only with tight cornering at low speeds. I try to Cadillac turn it if I have to make a narrow angle at a slow speed.

I am really unsure if the diff is welded but I always assumed this was the case as it drives fine literally 100% of the time that I am not making slow tight turns. rear end and transfer case seem to be good. (I changed the fluid when I bought the car. (roughly 10k miles on it since I bought).

 

[mike96]

It deffinetly feels like it is dragging 4000lbs when slow cornering or even in reverse backing out of the driveway haha
Just need to track down what it is now that is cause this problem but it does chirp/bind the rear end up when slow cornering or anything along those means... Looks like ill be pulling the rear sover off to see what kinda of rear diff I have and if it is welded and go from there in a week or so

*Will update thread as I go to figure this out just in case people have the same issue or questions

if your rear diff doesn't say LSD on it then quickest, easiest way to tell if you are having problems would be leave the car in gear, jack the back end off the ground (both tires) with the e-brake off and spin one wheel. if the other wheel rotates opposite direction then you have an open diff and it is working correctly.

 

[Jiggalude]

if your rear diff doesn't say LSD on it then quickest, easiest way to tell if you are having problems would be leave the car in gear, jack the back end off the ground (both tires) with the e-brake off and spin one wheel. if the other wheel rotates opposite direction then you have an open diff and it is working correctly.

I thought this was bad for the AWD cars?

 

[96 420a-t]

Nope it will be fine. Only real way to know for sure.