I have another Q for you-which trans do you have? - Saab 900 Bulletin Board - Saabnet.com
The banner above is an advertisment - if it asks you to download software, please ignore.
Site News - 7/1: Members: Log In to See Fewer Ads! | 5/28: SAAB Evolutions/TSN T-Shirts $14
[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
I have another Q for you-which trans do you have?
Like This Post: - Subscribe to Daily Digest for this Bulletin Board
Posted by GregD (more from GregD) on Tue, 16 Jul 2002 00:37:50 Share Post by Email
In Reply to: Is 3/4 on Green safe on the temperature gauge?, Mark, Mon, 15 Jul 2002 21:28:12
Alert me when someone posts in this thread:
Members do not see ads below this line. - Help Keep This Site Online - Signup

It's a question that I don't often see asked in these threads but it has a lot of relevance IMHO. I have a recently acquired 91S convertible with an auto trans. This thing runs well above the halfway mark at 70 on the highway on a 90 degree afternoon. Anytime I'm going slowly enough to hear, the fan is cycling (fans, as of tonight)on a hot day approaching a light. This is with a brand new radiator (glad I saved the old one!), a new 82 T-stat and a standard 92C fan switch. I have no reason to think that the water pump is producing sub-standard circulation either. The problem was even more acute in an 84T auto I previously owned (I hate the auto but if it's working I'll live with it 'til it fails!).

The bottom line-the auto trans dumps a large amount of heat into an already marginal cooling system. A significant (~40%) fraction of the waste heat in an engine is absorbed by the oil. In the 5 speeds a substantial fraction of this heat is dissipated through the trans casting. In the auto trans though, this heat along with all the heat produced by the trans itself is fed into the coolant in the NA cars. It's a poor arrangement that I don't think is very common in other makes. I'm thinking about switching to the liquid-air cooler used on the turbos (sans the thermostat arrangement) to see if it helps. Anyone ever crunch numbers on the cooling systems heat exchange capacity, fraction used at normal design conditions etc.?

posted by 12.90.11...

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!