SO my lsd is not happy.

 

Symtoms:

Diff temp = cold no problem

Driving on highway for more then 10 min results in a weird binding upon deseleration to a stop. The the diff becomes hard to turn then easy hard to turn then easy.

Rear tires are brand new so I think the lsd function has little to do with the problem.

 

History:

Junk yard diff installed on my car about 2 years ago.

Used the diff for about 1 year then noticed seals were leaking real bad.

Replaced all seals on the differential and replaced gear oil. Didn't have the spring balance to check the resistance to turning like manual said so I guesstimated at the preload on the pinion nut.

 

Now almost 6 months after I replaced the seals I am getting this binding problem.

 

Replaced the diff with another junk yard LSD unit and all problems went away. So something is defatly wrong with this one.

 

See pics below.

So my question is: what is my next coarse of action. Put grease on the teeth and see if the mesh is all messed up or is my pinion preload to tight or to loose?

 

Thanks

Edited March 16, 20242 yr by Subi81
Removed pictures

Question which car are you using this diff on? AWD or 4WD tranny and if 4WD, are you in FWD while this problem is happening?

Silly question, but did you use LSD additive in the gear oil?

I am wondering why you messed with the pinion. Grease the gears and show a pic. Looks like the tooth mesh is off but the glare makes it hard to be sure.

Ok,

 

Sorry it took so long to respond

 

The car is in Fwd when this happens.

I have tried it in 4wd and the sound seems to get a little worse.

 

The reason I messed with the pinoin was to replace the leaking front seal. You have to take off the drivline flange mount to get to the frount seal.

 

Will try to grease them after christmas.

 

Here is a pic of the gear oil. I did not put the additive in because I thought this gear oil was good to go out of the box. Let me know if I am wrong. I tried to get Genuine subaru and no dice

Edited March 16, 20242 yr by Subi81
Remove pictures

Yup, that's the right oil.

 

My 89 GL-10 AWD has a clink in the rear. I think it is the rubber mounting bushings on the rear diff.

 

My 89 GL-10 AWD has a clink in the rear. I think it is the rubber mounting bushings on the rear diff.

 

Yup mine does the same thing. The bushings are gone on mine.. I need a part ### so I can order some new ones

Does anybody have a part number? Is it Subaru only or is their an aftermarket manufacturer? Are the nissan ones the same?

https://www.subarugenuineparts.com/oe_parts_cat.html

Thanks for the reply I will have to look at the bushings.

 

Happy Holidays

What gear ratio do you have at the front diff and rear diff?

Cheers

AP

They are both 3.7. Trans and diff were taken from an 85-86 RX sedan.