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Old 04-26-2010, 04:32 PM   #101
Chris001
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Default Re: S-Series Automatic Transaxle "Reverse Slam Cure-All"

Thanks everone for all the great info. I fixed the Reverse Slam in my 99 SL2 this weekend and I couldn't have done it without you all.


Parts Numbers from Saturn of Sterling Virginia:
21001680 Input Shaft Nut $10.16
21001679 Output Shaft Nut $7.40
21001684 Gasket $12.16

Sockets from McMaster-Carr www mcmaster com
5849A72 23mm socket - $5.64 - fits perfectly, no grinding
7149A33 30mm socket - $11.55

What worked for me:
1. Following the instructions posted here.
2. Removed lower trans mount.
3. Lowered enging/trans cradle
4. Removed brake caliper.
5. Unbolted the wheel assembly.

Like kjmorley - I bent the input shaft tube slightly to get the end cover off as the strut was in the way. In hind-sight I could have saved myself a lot of aggravation if I'd just unbolted the wheel assembly from the bottom of the strut first (2 big bolts). Then you can move the strut to the right a bit to get enough clearance so the end cover can come straight back.

Once I had the wheel assembly out of the way, the cover slid right back in place.
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Old 04-26-2010, 05:25 PM   #102
OU812
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Default Re: S-Series Automatic Transaxle "Reverse Slam Cure-All"

Quote:
Originally Posted by Mgg4591 View Post
how are you suppose to tighten that nut? both of mine are really tight and i cant turn them at all.
If they're really tight then you dont have to tighten them.
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Old 04-28-2010, 11:58 PM   #103
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Default Re: S-Series Automatic Transaxle "Reverse Slam Cure-All"

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Originally Posted by OU812 View Post
If they're really tight then you dont have to tighten them.
I put the cover back on last week and have been driving the car and it still bumps or jerks into forward gears when under medium to heavy acceleration. I even added a container of Lucas tranny fix but that did didily squat too.
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Old 04-30-2010, 12:06 PM   #104
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Roll Eyes Re: S-Series Automatic Transaxle "Reverse Slam Cure-All"

Quote:
Originally Posted by Chris001 View Post
Parts Numbers from Saturn of Sterling Virginia:
21001680 Input Shaft Nut $10.16
21001679 Output Shaft Nut $7.40
21001684 Gasket $12.16
Considering the timing and state of most of our Saturn dealerships this advice is a little late. Folks, shop around for parts. The prices vary greatly. Even with shipping fees we usually come out ahead.

Case in point is at Saturn of Reading these same parts for resolving the automatic transmission reverse slam issue sell for about one-third of what Saturn of Sterling (and one-fifth of what Saturn of Gaithersburg) charge. I don't know why some Saturn dealerships such as Saturn of Sterling routinely charge 3x the normal price for parts and Saturn of Gaithersburg routinely charge 5x the normal price for parts. Greed...? Anyway thank goodness there still are other choices out there such as Saturn of Reading and in the past Saturn of Colma.

http://www.trademotion.com/partlocat...&siteid=214300

21001680 Input Shaft Nut $3.04
21001679 Output Shaft Nut $2.21
21001684 Gasket $3.63
Attached Images
File Type: jpg Reverse Slam parts at Saturn of Reading.jpg (73.9 KB, 64 views)
Attached Files
File Type: pdf Reverse Slam parts at Saturn of Reading.pdf (19.7 KB, 57 views)
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Old 05-25-2010, 09:40 PM   #105
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Default Re: S-Series Automatic Transaxle "Reverse Slam Cure-All"

Im going to finally cure what ails my car and put in a new Valve Body this weekend. My question is should i do an ATF and filter change to let the detergents in the new ATF collect all the gunk possible with the old valvebody on? then drain and replace before i put the new one on?
Thanks.
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Old 06-07-2010, 06:00 PM   #106
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Dizzy Re: S-Series Automatic Transaxle "Reverse Slam Cure-All"

Hi everyone!!!

First time on this site as a user and Im here because of this SLAM issue with all my gears. I bought a few weeks ago my 2000 sl1 with the head gasket problem which is now fix thanks to this site but then the SLAM issue became more apparent. It only slammed in reverse, so i did the wolfsman (I hope I got the name right) slam fix, and it cured it.... for a few weeks, this past weekend started slamming in all gear and it just feel like im driving a race car. It feel more like Im getting rear ended every time it switches gears... At this point should I try replacing the Valve Body or should I go for the Input/Output nuts? I hope you guys can help since you are all experts. Thanks for any advice possible.

2000 Blue SL1
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Old 06-07-2010, 08:25 PM   #107
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Default Re: S-Series Automatic Transaxle "Reverse Slam Cure-All"

Quote:
Originally Posted by KieroTakoBell View Post
Hi everyone!!!

First time on this site as a user and Im here because of this SLAM issue with all my gears. I bought a few weeks ago my 2000 sl1 with the head gasket problem which is now fix thanks to this site but then the SLAM issue became more apparent. It only slammed in reverse, so i did the wolfsman (I hope I got the name right) slam fix, and it cured it.... for a few weeks, this past weekend started slamming in all gear and it just feel like im driving a race car. It feel more like Im getting rear ended every time it switches gears... At this point should I try replacing the Valve Body or should I go for the Input/Output nuts? I hope you guys can help since you are all experts. Thanks for any advice possible.

2000 Blue SL1
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You probably should go for both.
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Old 06-07-2010, 09:52 PM   #108
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Dizzy Re: S-Series Automatic Transaxle "Reverse Slam Cure-All"

Thanks for replying, now does anyone know where I can get a used valve body? I called a few junk yards but nothing for it. They wanna sell me a used transmission. I guess a new one is costly so im gonna keep searching. (should I buy a new one instead of a used one?.....)
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Old 06-14-2010, 08:07 AM   #109
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Default Re: S-Series Automatic Transaxle "Reverse Slam Cure-All"

ok, did my valvebody this weekend and it didnt cure this but did help so im doin the nuts asap after the gasket comes in....anyone have a part # for the end cover gasket?

Also, anyone figure out which mount(s) were the best to remove to allow room to remove the cover. I want to be ready to do this with minimal downtime of the car. thanks
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Old 06-15-2010, 01:29 PM   #110
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Default Re: S-Series Automatic Transaxle "Reverse Slam Cure-All"

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Originally Posted by TCCustoms View Post
Also, anyone figure out which mount(s) were the best to remove to allow room to remove the cover. I want to be ready to do this with minimal downtime of the car. thanks
ANYONE? new parts will be here tomorrow so i wanna be ready!
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Old 06-17-2010, 01:10 PM   #111
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Default Re: S-Series Automatic Transaxle "Reverse Slam Cure-All"

Quote:
Originally Posted by KieroTakoBell View Post
Hi everyone!!!

First time on this site as a user and Im here because of this SLAM issue with all my gears. I bought a few weeks ago my 2000 sl1 with the head gasket problem which is now fix thanks to this site but then the SLAM issue became more apparent. It only slammed in reverse, so i did the wolfsman (I hope I got the name right) slam fix, and it cured it.... for a few weeks, this past weekend started slamming in all gear and it just feel like im driving a race car. It feel more like Im getting rear ended every time it switches gears... At this point should I try replacing the Valve Body or should I go for the Input/Output nuts? I hope you guys can help since you are all experts. Thanks for any advice possible.

2000 Blue SL1
KieroTakoBell.


Hi, Change your line pressure servo, it's the one that releases pressure when you shift gears, it's probably bad. I had the exact problem in my sw2 and I put in new servo and the problem went away. Hopefully that's your fix also.
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Old 06-17-2010, 03:38 PM   #112
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Default Re: S-Series Automatic Transaxle "Reverse Slam Cure-All"

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Originally Posted by racyroy1 View Post
Hi, Change your line pressure servo, it's the one that releases pressure when you shift gears, it's probably bad. I had the exact problem in my sw2 and I put in new servo and the problem went away. Hopefully that's your fix also.
Do you mean the solenoids?

I changed my valvebody and did the input and output nuts and it still didnt fix my slamming! Helped it some but not cured....
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Old 06-27-2010, 07:42 PM   #113
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Default Re: S-Series Automatic Transaxle "Reverse Slam Cure-All"

Temporary cure people...

i know its not a fix but still it helps

simply shift into Neutral for 3-5 seconds before shifting into Reverse
this will let the engine settle down and itll still shift hard but it wont be enough to jar your car and break things more so

ive been doing this for 2 months and its slammed one time (had the A/C on when shifting oops)
im ordering the parts to fix it today tho.
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Old 06-28-2010, 09:52 PM   #114
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Default Re: S-Series Automatic Transaxle "Reverse Slam Cure-All"

mine might be fine for awhile but i noticed one thing also that when it warms up and i go to stop at a traffic light or sign you'll notice it jump a little bit when it down shifts and thats when i know its gonna start slamming a gear or gears. I'll go through the gears again as i accelerate and it'll be fine for a stop sign/light but then it might slam again. I just dont understand it
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Old 11-12-2010, 01:12 PM   #115
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Default Re: S-Series Automatic Transaxle "Reverse Slam Cure-All"

You dont have to grind frame if you place support under cradle and loosen cradle bolts and jack up body of vehicle it will give you enough cleaRANCE TO REMOVE AND REPLACE WITH NO HASSLE
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Old 11-13-2010, 03:47 PM   #116
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Default Re: S-Series Automatic Transaxle "Reverse Slam Cure-All"

ok, im back with a new car but its a 5 spd so i dont need the reman valve body, valve body cover gasket, input and output shaft nuts, and trans filter that i never got to install so if anyones interested let me know....$110 shipped for all of it!
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Old 11-23-2010, 12:36 PM   #117
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Default Re: S-Series Automatic Transaxle "Reverse Slam Cure-All"

First of all....THANK YOU for this thread. couldn't have done it without you. I did both the valve body and the input bold tightening with was loose. The VB did the trick. 2nd and Reverse works great now...BUT I now have infrequent shifting to 4th (overdrive) and when it does shift to 4th it's not really there! it's like shifting to Neutral! HELP - Any suggestions?
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Old 11-28-2010, 05:07 PM   #118
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Default Re: S-Series Automatic Transaxle "Reverse Slam Cure-All"

My car has 138,000 miles, transmission slams in reverse..and all other four gears, even slams when downshifting..between 1st and 2nd gear when accelerating slowly I can hear a grinding sound..could a bad valve body cause all four of my motor mounts to break? I have replaced them four times...the first three times with crapy frowny mounts, and once with OEM, but they just keep breaking. Does this sound like the input and output shaft nuts and Valve Body??
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Old 12-20-2010, 02:43 AM   #119
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Default Re: S-Series Automatic Transaxle "Reverse Slam Cure-All"

Ok well I don't want to make anyone mad with this or anything but when I bought my car from a local dealer (rebuilds and sells salvage saturns) it had reverse slam. And I'm not sure what he did to it but he said there is a reverse solenoid that gets gummed up, and he just cleaned it and oiled it, never had a problem with reverse again.
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Old 01-19-2011, 10:18 PM   #120
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Default Re: S-Series Automatic Transaxle "Reverse Slam Cure-All"

I did the input/ output shaft fix 11 bucks w/ parts wasnt hard it worked great, I had pros saying it was going to cost 1500 for rebuilt trans,and laughed at me .. thanks for the cure
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