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Old 12-15-2001, 09:14 AM   #1
FriendOfSubaruOwner
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Default Really hard shifting

My friend has a '90 Legacy Wagon w/AWD, and an auto tranny. The shift from first to second is REALLY rough. The whole car shakes and the dash rattles. It just goes THUMP!!!! The other shifts are not that smooth either. He was thinking of changing the ATF, but if it is not that he has no idea what it could be. Any ideas???

BTW the tranny is NOT slipping
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Old 12-15-2001, 10:26 AM   #2
HIHO
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Could be a broken tranny mount. Did he check the fluid? Maybe time for a change.
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Old 12-15-2001, 06:10 PM   #3
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I know he's going to change the ATF soon, but I was wondering if there might be another cause.
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Old 12-15-2001, 06:21 PM   #4
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Yeah, check the engine and trans mounts too. The fliud COULD cause that prob, but is most likely not the cause.
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Old 12-15-2001, 08:13 PM   #5
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They also have a resistor mounted on the passenger side strut tower, if I remember correctly. The SVX's have it as well, although mounted in a different location. It's about a 10 ohm resistor, and seems to be ceramic, mounted in a metal frame used to mount it to the car. It's a pretty good sized rectangular piece. When I had my SVX, I disconnected it to firm up the shifts, since Subaru had it designed for comfort over performance. The resistor controls Duty Solenoid C in the tranny, and if it is open, you get full line pressure all the time, and get hard shifts.

My daughter has a '90 Legacy auto, so maybe if/when she is home tomorrow, I can get a picture and post it so you can get an idea of where it is and what it looks like. The SVX guys called it "The Resistor Mod". Some did it and liked it, and some thought it was too rough like that.

I've got a spare one, by the way, in case your friend needs it.

Rich
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Old 12-15-2001, 08:39 PM   #6
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^^^

Thanks for all the info!!! I'll tell him to check his Haynes manual for the resistor, and I'll also tell him to check out this post.
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Old 12-16-2001, 11:58 AM   #7
nazim
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Thumbs up OK!

thanx richeich, I'm the one whose having this problem, so I'll check it out.

And Tony, there is no need to tell me about this post since I do live on this site.
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Old 12-16-2001, 04:32 PM   #8
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That seems like a great mod to put in with a switch, where you can turn it on and off. When you want hard shifts, you just flip the switch, bypassing the resistor. When you have a girl in the car, the flip the resistor back on...
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Old 12-16-2001, 10:45 PM   #9
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I've got a really hard shift into 2nd gear also. It doesn't make everything shake, but it does jerk more than any other gear. I hate it. How hard is it to change the fluid?

-S
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Old 12-16-2001, 11:08 PM   #10
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It shouldn't be to hard. It wasn't on my Maxima. Just remove the plug, drain, and refill. I don't know about a filter. My Maxima had an internal fiter and didn't need to be changed,
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Old 12-17-2001, 02:45 PM   #11
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Quote:
Originally posted by HIHO
It shouldn't be to hard. It wasn't on my Maxima. Just remove the plug, drain, and refill. I don't know about a filter. My Maxima had an internal fiter and didn't need to be changed,
That's true of a manual, but you can't do that with an auto. If you just do a drain/fill routine, with an auto, you've only changed about 1/3 of the fluid. The rest is bound up in the system. If you're going to change your auto, go to a shop with machine that will do a flush/fill.

I'd recommend switching to a synthetic, too, it makes a big difference.

BTW, did this just start happening? I occasionally get a pretty harsh shift, 1st to 2nd. It appears to be standard behaviour.
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Old 12-17-2001, 03:10 PM   #12
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Yeah. most autos don't even have a drain plug. They are drained by removing the pan at the bottom which has about 10 or 12 bolts. It can get messy if you're not careful. And even though the torque converter holds some fluid, I got a ton of the fluid changed in the explorer and put in a new filter, which is better than not changing it at all. And I'm not sure that 2/3 of it is unchanged and in the system, more like 1/3. That's still a lot, but most of it will drain out during the change. And you can also clean the bottom of the pan where a lot of grime collects over the years before you bolt it back up. It will help the car even if that's not the cause of the problem...
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Old 12-17-2001, 03:34 PM   #13
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Talking How about this problem?

I asked this question a bit ago, and got NO responses, I sometimes wonder if people can even see my posts What would too much fluid (um like 2 qts) in an auto cause? Because I've been having REALLY bad tranny problems, like jerking when I give the engine gas again after letting go of the petal. And what I think is slipping. It also has trouble shifting down, and sometimes even up (like it shifts up 2 gears or something). Let me know what anyone thinks PLEASE. I don't want to get ripped off by some transmission shop when it could be something stupid.

Thanks in advance
Shawn (DoughtCom)
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Old 12-17-2001, 04:30 PM   #14
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I'll bet nobody is answering because nobody knows the answer. Post this same question in the Transmission forum and I'll bet you get a responce very quickly. Make sure you note that it is an Auto in the thread topic.

-S
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Old 12-18-2001, 03:11 PM   #15
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Quote:
Originally posted by janikphoto
And I'm not sure that 2/3 of it is unchanged and in the system, more like 1/3.
It really is close to a third, for most applications. Maybe less for an AWD, since we don't have a transfer case, but it's still quite a bit. You can get a full fluid swap, for less than $100. Money well spent, in my mind, especially if you are doing something like changing over to synthetic. I do a full fluid swap about every 35-50k miles.
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Old 12-21-2001, 12:40 AM   #16
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I agree that it would definitely be worth it for a fluid change to synthetic, but I wouldn't worry for a regular change. Especially if you take the time to clean the pan and change the filter too...
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