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Old 09-18-2011, 09:24 PM   #1
Team327
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2003 ION-2 Sedan
1993 SW2
Default Transmission slipping

New username, old saturn fan.
1993 sw2 auto




Back in January my diff pin blew through the bell housing. I got a Junkyard transmission and put it in. So my input and output shaft nuts are slipping. They have been for a while now. Have not had the time or money to fix yet. So now it is slipping really bad. Checked the fluid and it has a burnt smell, but no metal in it. The car only stays in 1st and won't shift, it doesn't slip all the time, just when trans gets overheated. SES light comes on, but does not stay on. Checked for codes and none are present.

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Old 09-18-2011, 09:51 PM   #2
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1998 SC2
Default Re: Transmission slipping

Clutches have now fried. Probably new transmission time again.

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Old 09-18-2011, 11:25 PM   #3
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1995 SL2
Default Re: Transmission slipping

Quote:
Originally Posted by OldNuc View Post
Clutches have now fried. Probably new transmission time again.
Yeah. If you drive much, with it slipping, the clutches are shot (it doesn't take much slipping to wear them out--they're not supposed to slip). If you still have the old transmission, you could swap the clutch discs or even the entire input and output shafts, and probably end up with something that worked. The only thing you'd need to buy is a new case gasket and probably a new end cover gasket (possibly a valve body cover gasket, as well--sometimes they're re-useable). The easiest solution is to swap in a new transmission, though.

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Old 09-18-2011, 11:47 PM   #4
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Default Re: Transmission slipping

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Originally Posted by PlasticCarsRock View Post
Yeah. If you drive much, with it slipping, the clutches are shot (it doesn't take much slipping to wear them out--they're not supposed to slip). If you still have the old transmission, you could swap the clutch discs or even the entire input and output shafts, and probably end up with something that worked. The only thing you'd need to buy is a new case gasket and probably a new end cover gasket (possibly a valve body cover gasket, as well--sometimes they're re-useable). The easiest solution is to swap in a new transmission, though.
If you care to, NAPA sells transmission rebuild kits that include the clutches.

To me, rebuilding my transmission was easier than going to a junkyard and finding another of unknown condition. ...But then, my transmission is a manual, which may be easier to work on.

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Old 09-21-2011, 08:53 PM   #5
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Default Re: Transmission slipping

got another junk yard transaxle. Putting it in now. Need to know the torque specs for the input and output shaft nuts. Gonna replace them before the trans goes in.

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Old 09-21-2011, 09:51 PM   #6
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Default Re: Transmission slipping

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Originally Posted by Team327 View Post
got another junk yard transaxle. Putting it in now. Need to know the torque specs for the input and output shaft nuts. Gonna replace them before the trans goes in.
They're both 111 ft*lbs (150 N*m). Use new nuts, or just use thread locker on the old ones (after cleaning the threads). They're not torque-to-yield; they're supposed to be replaced because they include a pressure activated thread locker in the threads (as far as I know, cleaning the threads and putting them on with medium strength loctite or equivalent will work just as well, or better, than new nuts--the really strong stuff will almost certainly be better than new nuts, but it could be a pain, if you ever have to take the transmission apart).

To get an accurate torque on the nuts, you will need to find a way to prevent the shafts from turning. Putting it in park will hold the output shaft, but the input shaft will still turn relatively freely. There are places you can wedge a screwdriver, and many go that route, but I'm not sure how happy I'd be about doing that. The best option is a chain wrench or good strap wrench (a very good investment, if you don't have one--they'll double as an oil filter wrench and jar opener, too). (Put it on the (exposed) first gear clutch pack.)

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Old 09-21-2011, 10:53 PM   #7
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1998 SC2
Default Re: Transmission slipping

You have to use Locktite 272 and clean both the old nuts and threads with acetone as any oil film at all and this will fail.

If you distort the clutch drum you will have all kinds of entertaining problems. Do not use a strap or chain wrench as it will distort.
The screw driver does work.

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Old 09-23-2011, 12:40 AM   #8
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2003 ION-2 Sedan
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Default Re: Transmission slipping

ok, trans is in. now will not start, no click, no crank, not even spinning the starter. The starter does work though. Took it to autozone and had it tested. It failed, got a new one, tested it and took it home and still no start. took off all grounds and sanded all contacts. even one under the coil pack. Still no start. Any ideas?? Car did start and run 2 days ago when we unloaded from car dolly.

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Old 09-23-2011, 12:45 AM   #9
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1998 SC2
Default Re: Transmission slipping

The range switch is seriously out of adjustment. The 2 wire plug on the range switch is the park/neutral starter interlock and if the switch is out of position -- no start. And if it is out of adjustment the trans will not shift either.

Go to my photo gallery and the FSM page for range switch adjustment and shift cable adjustment are both in there.

<----photo gallery

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Old 09-23-2011, 02:11 AM   #10
PlasticCarsRock
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Default Re: Transmission slipping

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Originally Posted by OldNuc View Post
The range switch is seriously out of adjustment.
That.

It doesn't need to be off by very much--they're pretty picky. If it's close, sometimes shifting through the gears a few times and back to park will be enough for it to start. Sometimes it will work find in neutral, but not in park.

Adjustment isn't that bad, as long as you have a multimeter (with alligator clips). Set if to continuity check (easiest if it beeps), and connect it to the two exposed terminals on top (one has a wire to it, the other is just for this purpose).

Loosen the two bolts and turn the range sensor towards the engine until you have continuity, with the transmission in DRIVE. Tighten the bolts, shift it back and forth a bit, and check that you still have continuity.

You can reach it from the top, but I think it's easier from the bottom--just take off the driver's side tire and splash-shields, and it's right there--easy to reach.

Oh, adjust the cable, first, if necessary.

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Old 09-23-2011, 10:32 PM   #11
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Default Re: Transmission slipping

ok, we thought we took care of that, but we did it in park. So will do it drive and see if that helps. Thanks for the response. Will let ya know how it turns out.

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Old 09-25-2011, 07:22 AM   #12
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Default Re: Transmission slipping

We checked for continuity in drive, but it had continuity through out the whole range. So we took off the switch and shook it. It was broke, well something was rattling inside it. Ordered a new one, should be in later today.
thanks again for the help!!!!!

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Old 09-25-2011, 08:26 PM   #13
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Default Re: Transmission slipping

It was the broken switch, replaced it today and car is running great. Thanks for all the help Oldnuc and PlasticCarsRock!!!!!

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Old 09-25-2011, 08:39 PM   #14
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Default Re: Transmission slipping

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It was the broken switch, replaced it today and car is running great. Thanks for all the help Oldnuc and PlasticCarsRock!!!!!
You're welcome. That switch is probably the reason the donor car went to the junkyard in the first place... it's sad that so many good cars get junked for something so trivial/cheap. At least some of the parts are going to good use.

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