SaturnFans.com
saturnfans.com - classifieds - forums - webmail


Go Back   SaturnFans.com Forums > Models > Saturn S-Series > S-Series Tech

Reply
 
Thread Tools Display Modes
Old 02-24-2010, 12:09 PM   #1
irish56
Advanced Member
irish56 is just really niceirish56 is just really niceirish56 is just really niceirish56 is just really niceirish56 is just really nice
 
irish56's Avatar
 
Join Date: Nov 2001
Location: Columbus, OH
Posts: 955

1999 SC1
Default Hard 4-3 downshift --> failing valve body?

Lately our '01 SL2 (auto) has started slamming on part-throttle 4-3 downshifts. 97K miles on the car. There are no other symptoms:

* Reverse engages normally - no slam
* All upshifts happen smoothly - no slam
* No trouble lights illuminated
* Full-throttle downshifts (4-2 or 4-1) happen smoothly - no slam
* If you anticipate needing to downshift and move the selector to 3, then apply the throttle, there is no slam
* Trans fluid and filter were changed 17K miles ago - fluid level, color, and odor are normal

Could this be caused by anything other than a failing valve body?
...
'95 SL1 auto (RIP)
'98 SL2 5sp (RIP)
'01 SL2 auto (RIP)
'99 SC1 auto (Mom's...keeps on truckin')
irish56 is offline   Reply With Quote
SaturnFans.com Sponsored Links
Old 02-24-2010, 03:23 PM   #2
woopty
Junior Member
woopty is on a distinguished road
 
Join Date: Feb 2010
Posts: 22
Default Re: Hard 4-3 downshift --> failing valve body?

"Could this be caused by other than a failing valve body???"

It seems that often when a failing valve body is the prognosis that the only issue is just one or two of the solenoids sticking or having a grainy actuation....

You can buy 'rebuilt' shift solenoids, They were simply removed from the valve body, cleaned well with solvent, tested with an ohm-meter to ensure that the coil was in proper condition then the contact posts cleaned, buzzed to make sure they actuate properly (These solenoids are normally open), the o-rings replaced and "Good as New"

This might well be worth a try with your 3-4 shift solenoid and Mainline Pressure Control solenoid as it costs next to nothing and doesn't take long to remove these solenoids from the car without removing the entire valve body.

Just a thought

edit: spelling and grammar
woopty is offline   Reply With Quote
Old 02-24-2010, 03:35 PM   #3
woopty
Junior Member
woopty is on a distinguished road
 
Join Date: Feb 2010
Posts: 22
Default Re: Hard 4-3 downshift --> failing valve body?

Oh yeah;
The proper resistance for the solenoids (for models years 93 and up) is 4 Ohms when cold and 6 Ohms when hot according to TransX.
woopty is offline   Reply With Quote
Old 02-25-2010, 10:22 AM   #4
irish56
Advanced Member
irish56 is just really niceirish56 is just really niceirish56 is just really niceirish56 is just really niceirish56 is just really nice
 
irish56's Avatar
 
Join Date: Nov 2001
Location: Columbus, OH
Posts: 955

1999 SC1
Default Re: Hard 4-3 downshift --> failing valve body?

Thanks for the info. Where's a good source for the "rebuilt" solenoid? I don't see them listed at NAPA or RockAuto.

Maybe I should just contact Special Forces for a rebuilt valve body?
...
'95 SL1 auto (RIP)
'98 SL2 5sp (RIP)
'01 SL2 auto (RIP)
'99 SC1 auto (Mom's...keeps on truckin')
irish56 is offline   Reply With Quote
Old 02-25-2010, 11:53 PM   #5
woopty
Junior Member
woopty is on a distinguished road
 
Join Date: Feb 2010
Posts: 22
Default Re: Hard 4-3 downshift --> failing valve body?

"Rebuilt" solenoids are usually available on ebay and are almost certainly a disrespected and 'off-label' approach..... Results are what matter though, and it's worked for me in the past....it's a cheap easy try to get your situation sorted out and at the worst, you'll still be good to go with a new VB regardless.

Before I sent off for a rebuilt VB, you might should check the connections through the wiring harness connectors in your VB, as a poor electrical connection = a voltage drop that will make your tranny shift poorly.
woopty is offline   Reply With Quote
Old 03-03-2010, 09:53 AM   #6
irish56
Advanced Member
irish56 is just really niceirish56 is just really niceirish56 is just really niceirish56 is just really niceirish56 is just really nice
 
irish56's Avatar
 
Join Date: Nov 2001
Location: Columbus, OH
Posts: 955

1999 SC1
Default Re: Hard 4-3 downshift --> failing valve body?

I found the solution! I bought my wife a newer car and took the '01 SL2 for myself. I perform my 4-3 downshifts manually. No more slam!

When warm weather comes, I will be sure to check all the connections at the VB as you recommend. I hope to keep this car a long time. Other than this little glitch, it runs and drives like it did the day we drove it off the lot at Saturn/West almost nine years ago.
...
'95 SL1 auto (RIP)
'98 SL2 5sp (RIP)
'01 SL2 auto (RIP)
'99 SC1 auto (Mom's...keeps on truckin')
irish56 is offline   Reply With Quote
Old 06-15-2021, 12:58 AM   #7
Shrocky5
Junior Member
Shrocky5 has a spectacular aura aboutShrocky5 has a spectacular aura aboutShrocky5 has a spectacular aura about
 
Join Date: Jan 2019
Location: Erlanger, KY
Posts: 47

2002 SL2
Default Re: Hard 4-3 downshift --> failing valve body?

I know it's a stretch as this thread is dated... But my 02 SL2 is doing this exact same thing. It's been doing it for a while. Did you ever chase down the actual problem?
Shrocky5 is offline   Reply With Quote
Old 06-15-2021, 11:59 PM   #8
El_bell
Junior Member
El_bell is on a distinguished road
 
El_bell's Avatar
 
Join Date: May 2021
Location: New England
Posts: 27

1997 SL2
Default Re: Hard 4-3 downshift --> failing valve body?

Quote:
Originally Posted by Shrocky5 View Post
I know it's a stretch as this thread is dated... But my 02 SL2 is doing this exact same thing. It's been doing it for a while. Did you ever chase down the actual problem?
Mine used to 4-3 shift kinda rough and all I've done to the transmission is a fluid change and new mounts. I would start with either the transmission mound or the 2 torque strut mounts. Idle/shifting became way smoother when I finally replaced those on mine.
El_bell is offline   Reply With Quote
Old 06-16-2021, 07:47 PM   #9
Shrocky5
Junior Member
Shrocky5 has a spectacular aura aboutShrocky5 has a spectacular aura aboutShrocky5 has a spectacular aura about
 
Join Date: Jan 2019
Location: Erlanger, KY
Posts: 47

2002 SL2
Default Re: Hard 4-3 downshift --> failing valve body?

Well problem solved. I decided to just throw a valve body at it. Ordered one from Ken Partin online got it next day. She shifts as good as my 2017 Sonata with 50k on it now. Smooth as butter. No more violent slam on 4 - - 3 downshifts.
Shrocky5 is offline   Reply With Quote
Reply

Bookmarks


Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
Valve Body Manual Valve Interchange Question acman S-Series Tech 2 11-05-2009 10:40 PM
hard 2 to 1 downshift 1993 SL2 TAAC trans gcguru S-Series Tech 1 06-12-2009 12:22 PM
Replaced valve body now a hard shift from 1st to 2nd gear marionr26 S-Series Tech 5 05-04-2009 04:19 PM
Hard to downshift into 2nd /manual dsbike S-Series Tech 1 05-14-2008 11:53 AM
Hard shifting after valve body swap. pjhalifax S-Series Tech 9 08-27-2007 10:54 AM


All times are GMT -4. The time now is 06:39 PM.

Advanced Forum Search | Advanced Photo Search


Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2021, vBulletin Solutions Inc.
SaturnFans.com. The Saturn Enthusiasts Site.