The above is an advertisment. If it asks you to download software or create an account, please ignore it.
Site News - 7/11: No New News Today | 5/10: 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: Setting inner driver bearing carrier shim stack height
Like This Post: - Subscribe to Daily Digest for this Bulletin Board
Posted by Cmyles [Email] (#1126) [Profile/Gallery] (more from Cmyles) on Thu, 4 Jul 2013 21:53:05 Share Post by Email
In Reply to: Setting inner driver bearing carrier shim stack height, RS [Profile/Gallery] , Thu, 4 Jul 2013 17:13:20
Alert me when someone posts in this thread:
Members do not see ads below this line. - Help Keep This Site Online - Signup

RS,
If I had to do what you are asking here's how I would go about it: Get another inner driver assembly and a pile of assorted shims (they were made in three thicknesses). I would oil the bearings and install the assembly with no shims and only every other bolt and tighten them gradually to 20 INCH pounds while rolling the differential. Next you measure the gap with a feeler gauge at two opposite points and figure out the average gap. Add 0.008" to that figure and make up a shim pack that thick then remove and re-install the inner driver assembly with that shim pack. Carefully tighten all six bolts to 21 FOOT pounds while rolling the differential. Periodically while tightening the bolts check that there is "some" backlash of the ring gear. If the back lash disappears completely stop tightening the bolts, we'll have to start over with either more or less shims (depending on whether you are working on the right or left side). As long as there is some backlash keep tightening the bolts until they all hit 21 Foot pounds.

Now it's time to see how close to the original setting you are and the best way to do that is with a marking compound transfer test. Paint the drive faces of the pinion gear with some toolmakers Prussian blue or some artist's oil paint of any bright color then while placing some "braking" pressure to the ring gear rotate the input shaft of the transmission (in a forward gear) so that the ring gear is driven (forward) by the pinion. Once it makes a full revolution you examine how the the pigment has transferred from the pinion to the ring gear teeth faces. Generally speaking the "contact patch" should be approximately centered between the heel and toe and the root and tip of the tooth face. More importantly it should be exactly where the shiny patch that has resulted from use is. Select a tooth that has a very clear transfer pattern showing and wipe the pigment off of the adjacent tooth so you can make a comparison. If the pigment patch corresponds exactly to that shiny wear patch then you have shimmed the inner driver assembly correctly. If the pigment patch is shifted out toward the rim of the ring gear then you have too much backlash. If the pattern is shifted in towards the toes of the teeth (the center of the gear) then you need more backlash. Since you haven't changed the pinion position those two possible pattern shifts should be your only concern. You can measure the backlash with a dial indicator clamped to the unit but since there is an acceptable range of backlash and you don't know what the original dimension was that technique will only get you close. The pigment transfer technique will potentially allow you to get it right back to where it was.
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 © 1988-2025 - 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!