differential help? - Subaru Enthusiasts Car Club of the Sierras

vic · 2009-09-19, 07:13 PM

I am getting major chatter when full lock turning and is getting worse. It goes away when I go to open center diff. I changeed the oil tonight to Royal purple 75-90 wt. synthetic and took it for a test drive. It semmed better but still pretty bad. Should I forego running tomarrow? Any advice or help will be greatly appreciated! 07 STI

Dean · 2009-09-19, 07:28 PM

Were you running locked, or Auto?

What fluid did you have in it before?

Tire rub on the fender well/liner?

Many of us are running Lightweight shockproof in the trans with great results.

vic · 2009-09-19, 07:34 PM

I was running auto with stock oil and no tire rub. I also have lightweight shockproof in the tranny.

Dean · 2009-09-19, 07:46 PM

What did you change the fluid in then?

Run it... WTF? It is either going to fail or not anyway.

Bring the trailer out just in case?

MikeK · 2009-09-19, 08:52 PM

Mine did that when I put the wrong stuff in the rear diff. If you recently changed the rear diff oil, you probably put the wrong stuff in. In fact, if you put the same stuff in the diff as you put in the tranny, then you definitely put the wrong stuff in.

Kevin M · 2009-09-19, 08:52 PM

The gear oil you use doesn't affect the operation of the center diff.

MikeK · 2009-09-19, 08:53 PM

Quote:

Originally Posted by vic

It goes away when I go to open center diff.

BTW any time you take it out of auto you will get some degree of chatter around sharp corners.

MattR · 2009-09-19, 09:03 PM

Vic, I just got your message, I'm sorry...my phone died and I got distracted trying to help a friend with a keg....I hope you got it resolved...

vic · 2009-09-20, 05:31 AM

i put the shockproof in back in March. it made a world of differance in the shifting. The binding seems to be coming from the rear diff. I changed to the 75-90 royal purple last night to see if that would help. It seems to have helped a little, but it is still binding on take off.

2009-09-19, 07:13 PM	#1
vic n00b Join Date: Feb 2008 Posts: 11	differential help? I am getting major chatter when full lock turning and is getting worse. It goes away when I go to open center diff. I changeed the oil tonight to Royal purple 75-90 wt. synthetic and took it for a test drive. It semmed better but still pretty bad. Should I forego running tomarrow? Any advice or help will be greatly appreciated! 07 STI

2009-09-19, 07:28 PM	#2
Dean Señor Cheap Bastarde Real Name: Dean Join Date: May 2003 Location: $99 Tire Store Posts: 9,294 Car: $.04 STI Class: Fast,Cheap & Reliable=STI Deal, did somebody say Deal? Oh, Dean, yeah that's me.	Were you running locked, or Auto? What fluid did you have in it before? Tire rub on the fender well/liner? Many of us are running Lightweight shockproof in the trans with great results. __________________ I am a Commodore PET --- Now get off my lawn you kids...

2009-09-19, 07:46 PM	#4
Dean Señor Cheap Bastarde Real Name: Dean Join Date: May 2003 Location: $99 Tire Store Posts: 9,294 Car: $.04 STI Class: Fast,Cheap & Reliable=STI Deal, did somebody say Deal? Oh, Dean, yeah that's me.	What did you change the fluid in then? Run it... WTF? It is either going to fail or not anyway. Bring the trailer out just in case? __________________ I am a Commodore PET --- Now get off my lawn you kids...

2009-09-19, 08:52 PM	#6
Kevin M EJ22T Join Date: Sep 2003 Location: Reno Posts: 9,445 Car: '93/'01 GF6, mostly red Class: 19 FP	The gear oil you use doesn't affect the operation of the center diff. __________________ FWD is the new AWD

2009-09-19, 09:03 PM	#8
MattR El Matador Real Name: Matt Join Date: Dec 2002 Location: Reno, NV Posts: 10,660 Car: 2012 Toyota Tacoma Class: ?	Vic, I just got your message, I'm sorry...my phone died and I got distracted trying to help a friend with a keg....I hope you got it resolved... __________________ "Dallas..We have a problem.”

2009-09-19, 07:34 PM	#3
vic n00b Join Date: Feb 2008 Posts: 11	I was running auto with stock oil and no tire rub. I also have lightweight shockproof in the tranny.

2009-09-19, 08:52 PM	#5
MikeK Captain Turbo Join Date: Feb 2004 Location: Reno Posts: 3,318 Car: 05 STi	Mine did that when I put the wrong stuff in the rear diff. If you recently changed the rear diff oil, you probably put the wrong stuff in. In fact, if you put the same stuff in the diff as you put in the tranny, then you definitely put the wrong stuff in.

2009-09-20, 05:31 AM	#9
vic n00b Join Date: Feb 2008 Posts: 11	i put the shockproof in back in March. it made a world of differance in the shifting. The binding seems to be coming from the rear diff. I changed to the 75-90 royal purple last night to see if that would help. It seems to have helped a little, but it is still binding on take off.

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