Jump to content
Ultimate Subaru Message Board

4EAT duty c solenoid & Clutch pack replacement.

Recommended Posts

Yeah, it's a pretty good (old) thread. I wish it was complete with pics and a solid ending. I have read it several times. Still alot of good info.

Share this post

Link to post
Share on other sites
you're going to have to watch for a very long time.


this thread is 4 years old.


I know but it's also the best thread I've found thus far on the subject and I have a necessary interest in it. Hoping to Frankenstein the thread...

Share this post

Link to post
Share on other sites

Just picked up a 98' Outback Sport with.. a lot of miles.


Working to fix it up for a daily driver but noticed this "torque bind" issue that is apparently a common problem - this thread and other various links found throughout the web are helpful. I didn't really notice any type of sporadic or severe malfunction of the AWD system; I just thought I had a cusco front and rear LSD and a DCCD on full lock installed on what I thought to be a stock OBS I bought from an old lady, as soon as I made the trip out of my driveway. lol


I'll try to see if I can post a few pics to add to the thread, since i'm in the process of fixing mine too. hah.


My MAIN problem, is how the frick do you change the reduction gear? I haven't asked the dealer if you buy the whole shaft, gears and all, but it does seem a bit tough without the special puller shown in the FSM.


I'd like to replace wearable parts associated with the transfer clutch system (awd) within reason to ensure trouble-free operation for the remaining life of the vehicle, so I was planning on replacing - the grooved reduction gear, clutch pack, transfer piston seal, and the duty solenoid c. I guess those are the basic parts that should be replaced, no?


Note: The FSM i'm using is for the 99-00' Impreza, and I think the transmission is not exactly the same as the 4eat in my 98' OBS. I noticed various differences, and one is that my transmission does not have an external spin-on oil filter, nor does it have as much sensors. The duty c solenoid also seems to look different in the FSM then the one I have on my car. This might make it a little harder for me, and I hope it doesn't screw me up too bad. The basic design is the same, but I don't know if there are different gaskets or gasket / seal design changes in the various transmission revisions.


This is the Reduction Gear as shown in the FSM. (# 4)




This is mine, grooved as you can see.




This is a picture of the extension housing .. includes the clutch pack and everything behind the reduction gear side.




And mine.. most have already seen this same picture a zillion times.. :D

You can't really see if the clutch pack is worn just by looking at it, I guess. Who knows.



Edited by caterpill

Share this post

Link to post
Share on other sites

the most common repair is to use a dremel and smooth out the grooves. there is a good write up on it somewhere.


the other parts, clutch discs and duty c are all available at the dealer.


but i'm not 100% sure the grooves cause binding., but i don't know. i thought they caused a slow to engage AWD . but sa long as you have it open you may as well address it.

Share this post

Link to post
Share on other sites

this thread is more than 7 years old,

i doubt andyjo is going to respond.


having said that

it is highly likely it is a 95 - 99 auto trans,

lego or impreza does not matter,

they are the same.


what are you working on?

and kudos for using the search function.

Share this post

Link to post
Share on other sites

I have a Legacy GT 2.5 L 1997. So I think this one describes my trans.


Question, on the on line stores I have two options for the solenoid, one is just the solenoid and other is the solenoid attached to a small metallic piece that sits on the case (I think that is the duty valve). I'm thinking I just need the solenoid (that of course is cheaper). What do you recommends? Look at the illustration, is the highlighted.




Share this post

Link to post
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now