Site News - 11/18: Reminder: How You Can Make Amazon Pay Saabnet | 11/14: SOC 42 NJ | 10/31: Saabnet 36 Years on the Internet | 7/1: Members: Log In to See Fewer Ads!
[General | Members | C900 | 9000 | NG900 & OG93 | 93 | 95 | NG95 | 99 | Sonett | Vintage Models | Clubs | Other Cars | FAQs | Gifts | Member Photo Galleries | Member Directory | Classifieds | Manuals | *Buddy Registry | *Mileage Registry | Polls | What's New | Raffle | Photo of the Month | Sponsors]

C900 Bulletin Board
1979-1993 & 94 Conv [Subscribe to Daily Digest]
(Search Author's Posts: e.g. Keyword:username)*Members Only

[Main C900 Bulletin Board | BBFAQ | Prev by Date | Next by Date | Post Followup ] Member Login / Signup - Members see fewer ads. - Latest Member Gallery Photos
Re: Primary Drive or Something else?
Like This Post: - Subscribe to Daily Digest for this Bulletin Board
Posted by Cmyles [Email] (#1126) [Profile/Gallery] (more from Cmyles) on Mon, 9 Dec 2024 07:56:43 Share Post by Email
In Reply to: Primary Drive or Something else?, Saabina [Profile/Gallery] , Sun, 8 Dec 2024 12:12:45
Alert me when someone posts in this thread:
Members do not see ads below this line. - Help Keep This Site Online - Signup

Saabini,
There's always a tiny bit of slack in the drivetrains of these cars though not enough to be detectable while driving. So isolating the cause will come down to distinguishing between normal and excessive slack. I'd suspect a clutch issue first. If close examination rules out a slipping and then grabbing clutch then locating excess slack in the gearbox will require removal of the front and rear covers. With that mileage the primary chains might be stretched beyond what the tensioner can fully contend with. Also at that mileage swarf may have blocked the tiny one way valve that fills the tensioner with oil so it's not working at all. Extreme amounts of oil born swarf can also accumulate in the bore of the input and mainshafts which will prevent oiling of the mainshaft gears and their bushings, causing total failure.

Examining the chains and sprockets is just a matter of removing the front gearbox cover, checking the slack and seeing if the tensioner is pumped up or will pump up. Badly worn chains will often rattle and you didn't mention noticing that.

Another possibility given the mileage is that the pinion bearings are extremely worn and allowing slight lifting of the pinion shaft before torque is transmitted to the ring gear. On coasting to a stop the pinion gear is forced back down and when you take off it's again lifted. A five speed with that much pinion bearing wear will fail catastrophically very soon. You may be able to detect that slop by lifting the car, removing the rear cover and watching the pinion gear as one wheel is held still and the other wheel is rolled back and forth a small amount.

We can't rule out that the slack is occurring somewhere out in one or both axle assemblies, the CV Rzeppa joints, inner drivers and tripod assemblies or damaged splines on the axle shafts. Those issues are fairly easy to isolate and repair but have their own specific symptoms, like vibrations.
Posts in this Thread:
Alert me when someone posts in this thread:
Members do not see ads below this line. - Help Keep This Site Online - Signup
Post a Followup

No Site Registration is Required to Post - Site Membership is optional (Member Features List), but helps to keep the site online
for all Saabers. If the site helps you, please consider helping the site by becoming a member.

Name: Member Login / Signup - Members see fewer ads. - Latest Member Gallery Photos
E-Mail: (Optional)
Re-Enter E-Mail: (Confidential & Secure - Not revealed to other users!)
Note: Please check your spam folder for BB responses.

Subject:

Posting rules are simple - No for sale/wanted ads may be posted here - use the site classifieds.
You may not cross-post your message to multiple BBs.
Not permitted: political/religious topics and being disrespectful (personal attacks, insults, etc...).
 Site Members do not see any red text, inline ad links, bottom of page anchor ads, box ads, or anti-spam check.

Message: (please no for sale/wanted classifieds - post those in the Saabnet.com Classifieds)
Links are now automatically made active, no need for any special code (or use the Option Link field below) - don't put links in () or end with a '.'
To add inline images to your post, use [img]http://www.domain.com/img.jpg[endimg] (or use the Optional Image Link field below).

Links are now automatically made active, no need for any special code (or use the Option Link field below) - don't put links in () or end with a '.'
To add inline images to your post above, use [img]http://www.domain.com/img.jpg[endimg] (or use the Optional Image Link field below).
Optional Link: (e.g. http://www.saabnet.com/)
Link Title: (Optional)
Optional Photo/Image Link: (e.g. http://www.saabnet.com/img.jpg)
Photo/Image to Upload: (Please be patient while file uploads)



StateOfNine.com
SaabClub.com
Jak Stoll Performance
M Car Covers
Ad Available

The content on this site may not be republished without permission. Copyright © 1988-2024 - The Saab Network - saabnet.com.
For usage guidelines, see the Mission & Privacy Notice.
[Contact | Site Map | Saabnet.com on Facebook | Saabnet.com on Twitter | Shop Amazon via TSN | Site Donations]

Random Saabnet.com Member Gallery Photos (Click Image)
This is a moderated bulletin board - Posting is a privilege, not a right. Unsolicited commercial postings are not allowed (no spam). Please, no For Sale or Wanted postings, SERIOUSLY. Classifieds are to be listed in The Saab Network Classifieds pages. This is a problem solving forum for over 250,000 Saab owners, so expect to see problems discussed here even though our cars are generally very reliable. This is not an anything goes type of forum. Saabnet.com has been a moderated forum since 1988. For usage guidelines, see the Saabnet.com Mission and Purpose Page. Please remember that you are not anonymous. Site Contact | Site Donations | Other Sites by SP - Poverty2Prosperity.org | Run Club Menlo Park | ScreenBot


Site Members do not see red text instructions, bottom of the page anchor ads, or box ads.
Click here to see all the Site Membership Benefits!