Getting ready to put the race fluid in the trans...what will it be? - SaabCentral Forums
*
Home Saab Pictures Saab Classifieds Saab Dealer Listings Saab Forum Saab Forum


Go Back   SaabCentral Forums > Saab C900, 1979-1993 & '94 Convertible (C=classic) > C900 Performance, Mods & Tuning

C900 Performance, Mods & Tuning Covers Tuning & Performance modifications for the Classic 900 (C900)

SaabCentral.com is the premier Saab Forum on the internet. Registered Users do not see the above ads.
Reply
 
Thread Tools Display Modes
  #1  
Old 27th June 2012
Tailspin's Avatar
Tailspin Tailspin is offline
Saab Lunatic
 
Join Date: Mar 2008                                                
Location: Ellington, CT
My Saabs: '03 9-5 Aero, 08 9-3, '89 C900LM
Posts: 2,000
Default Getting ready to put the race fluid in the trans...what will it be?

Right now I have Pennzoil synchromesh fluid in my 5-speed and it really does seem to work well, but I'm about to change the dipstick cover and diff cover to heavy duty reinforced options, and will be doing the final trans flush then. This box will be raced in lemons, and we killed one last race. I do NOT want to have to change it again.

So bottom line, whats the best fluid for a trans that's got the punishment of a lifetime in its future? I'm contemplating a standalone gearbox oil cooler on top of an added engine oil cooler (its an NA) I just really want this box to last.
__________________
24hrs of LeMons SAAB 900 project: The Carbeque Updated 3/19/14
Well....the car is apart. Time for that T5!
Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
  #2  
Old 28th June 2012
DenCon DenCon is offline
Active Member
 
Join Date: Jul 2011                                                
Location: Cle Elum, WA USA
My Saabs: '84 900, '91 900 S Cvt (my son's)
Posts: 123
Default

I ran Redline MTL in all my cars, including my 5-spd 99 race car, without any problems; I'm going to try Shock Proof this time.
Reply With Quote Quick reply to this message
  #3  
Old 3rd July 2012
Salna Salna is offline
Junior Member
 
Join Date: Jun 2012                                                
Location: Chicago, IL
My Saabs: 85 SPG, 91 C900 Turbo
Posts: 22
Default

We flush our tranmission fluid after every race. Anything to keep the gearbox from exploding. I think we are going to have to get a cooler and reinforced plates as well, because we've ruined our transmission already. We run Lemons/Chump in the midwest.
Reply With Quote Quick reply to this message
  #4  
Old 4th July 2012
Tailspin's Avatar
Tailspin Tailspin is offline
Saab Lunatic
 
Join Date: Mar 2008                                                
Location: Ellington, CT
My Saabs: '03 9-5 Aero, 08 9-3, '89 C900LM
Posts: 2,000
Default

So that's one vote for Redline MTL, what team are you Salna?
__________________
24hrs of LeMons SAAB 900 project: The Carbeque Updated 3/19/14
Well....the car is apart. Time for that T5!
Reply With Quote Quick reply to this message
  #5  
Old 4th July 2012
Salna Salna is offline
Junior Member
 
Join Date: Jun 2012                                                
Location: Chicago, IL
My Saabs: 85 SPG, 91 C900 Turbo
Posts: 22
Default

Team Failcar haha. I didn't notice your location until now.

For the record we use Honda MTF right now though may try red line or industrial gear oil soon.
Reply With Quote Quick reply to this message
  #6  
Old 4th July 2012
Tailspin's Avatar
Tailspin Tailspin is offline
Saab Lunatic
 
Join Date: Mar 2008                                                
Location: Ellington, CT
My Saabs: '03 9-5 Aero, 08 9-3, '89 C900LM
Posts: 2,000
Default

Been looking around for info on redline, I can't remember where I saw that shockproof was a no-no, I'll keep looking for that but in the meantime I found this thread that describes the thicker MTL-90 for hotter climates: http://www.saabnet.com/tsn/bb/900/index.html?bID=397811
__________________
24hrs of LeMons SAAB 900 project: The Carbeque Updated 3/19/14
Well....the car is apart. Time for that T5!
Reply With Quote Quick reply to this message
  #7  
Old 4th July 2012
Tailspin's Avatar
Tailspin Tailspin is offline
Saab Lunatic
 
Join Date: Mar 2008                                                
Location: Ellington, CT
My Saabs: '03 9-5 Aero, 08 9-3, '89 C900LM
Posts: 2,000
Default

OK from what I'm reading about shockproof is that it's not for synchros, unless they changed their formula because on their website it contradicts that. I'm just going to get some MTL-90 and an oil cooler, call it a day on that unless anyone else has something to say..
__________________
24hrs of LeMons SAAB 900 project: The Carbeque Updated 3/19/14
Well....the car is apart. Time for that T5!
Reply With Quote Quick reply to this message
  #8  
Old 5th July 2012
Geoff Weeks Geoff Weeks is offline
Saab Crazy
 
Join Date: Dec 2010                                                
Location: Lyman, IA
My Saabs: 900S
Posts: 843
Default

Engine oil (SAE 50) has the same viscosity as 90 GL but handles heat better, which is why it is the prefered oil in heavy truck transmissions, I would go with SAE 40 (= to 80 GL) or 30 (= to 75 GL) if you are inclined to go with other then stock. BTW I believe that trans failures are not lube related but case related, in that the case flexes. I'd be less concerned about lube and more about braceing the case in anyway you can.
Reply With Quote Quick reply to this message
  #9  
Old 7th July 2012
Tailspin's Avatar
Tailspin Tailspin is offline
Saab Lunatic
 
Join Date: Mar 2008                                                
Location: Ellington, CT
My Saabs: '03 9-5 Aero, 08 9-3, '89 C900LM
Posts: 2,000
Default

Yea probably going to be getting that steel diff cover from (pending sponsorship) hahaha
__________________
24hrs of LeMons SAAB 900 project: The Carbeque Updated 3/19/14
Well....the car is apart. Time for that T5!
Reply With Quote Quick reply to this message
  #10  
Old 8th July 2012
Cark's Avatar
Cark Cark is offline
Saab Lunatic
 
Join Date: Sep 2003                                                
Location: Woodstock, NH
My Saabs: 03 Aero Wagon 5 spd, 85 turbo 3dr 5 spd
Posts: 1,694
Default

I talked to one of the guys from the RallyHo team up in Maine the other day, and he recommended 2 qts MTL, 1 qt of Lucas oil stabilizer, and then top it off with "whatever".

Would like to change out the fluid in my 85 soon, so may try this recipe.
Reply With Quote Quick reply to this message
  #11  
Old 9th July 2012
Tailspin's Avatar
Tailspin Tailspin is offline
Saab Lunatic
 
Join Date: Mar 2008                                                
Location: Ellington, CT
My Saabs: '03 9-5 Aero, 08 9-3, '89 C900LM
Posts: 2,000
Default

ive also heard of this recipe...hmm
__________________
24hrs of LeMons SAAB 900 project: The Carbeque Updated 3/19/14
Well....the car is apart. Time for that T5!
Reply With Quote Quick reply to this message
  #12  
Old 12th July 2012
ejenner's Avatar
ejenner ejenner is offline
Banned
 
Join Date: Nov 2003                                                
Location: www.saabsforum.com
My Saabs: 900 Carlsson, 99t, 99 T16, 900 t16 vert
Posts: 7,270
Default

Quote:
Originally Posted by DenCon View Post
I ran Redline MTL in all my cars, including my 5-spd 99 race car, without any problems; I'm going to try Shock Proof this time.
The shockproof is too thick. Stick with the MTL - it's the best I've used so far. I tried the shockproof and wouldn't recommend it. It's good oil but not right for the c900 transmission.
Reply With Quote Quick reply to this message
  #13  
Old 21st July 2012
16ValveTurbo's Avatar
16ValveTurbo 16ValveTurbo is offline
Active Member
 
Join Date: Apr 2011                                                
Location: Seattle, Washington
My Saabs: 92' 900T, 96 9000 CS
Posts: 110
Garage
Default

Redline MTL is a common one for converting from the old dyno oil to GearBox oil, or racing application. I use Mobil 1 Synthetic Gear Oil with an additive called "Power Punch" which is a high pressure gear additive that contains Molybdenum Sulfide. This stuff really prevents wear, this stuff let a 1985 NA 900 last 9 years after the pinion bearing was expected to fail we bought it for my brother for 150 bucks from a friend. I don't exactly race my car, but I'm definitely boosting to 10psi in every gear, hehe
__________________
I'll Never Own Another Car.
Check Out My Site For C900 Tuning and Repairs! - Click Here
Reply With Quote Quick reply to this message
  #14  
Old 22nd July 2012
Tailspin's Avatar
Tailspin Tailspin is offline
Saab Lunatic
 
Join Date: Mar 2008                                                
Location: Ellington, CT
My Saabs: '03 9-5 Aero, 08 9-3, '89 C900LM
Posts: 2,000
Default

Put in the 2q mtl 1q lucas stabilizer, now im getting a bit of crunchyness shifting up to third...do you think this is because its a fill meant for high temperatures? This is when the car is running cool on normal roads, and i do a spirited 2nd to 3rd shift at 4500k rpm. Should I assume when the car is racing and really hot, that this will go away?
__________________
24hrs of LeMons SAAB 900 project: The Carbeque Updated 3/19/14
Well....the car is apart. Time for that T5!
Reply With Quote Quick reply to this message
  #15  
Old 17th September 2012
Salna Salna is offline
Junior Member
 
Join Date: Jun 2012                                                
Location: Chicago, IL
My Saabs: 85 SPG, 91 C900 Turbo
Posts: 22
Default

So now that you've raced the car with the stabilizer, what are your thoughts?
Reply With Quote Quick reply to this message
  #16  
Old 17th September 2012
Tailspin's Avatar
Tailspin Tailspin is offline
Saab Lunatic
 
Join Date: Mar 2008                                                
Location: Ellington, CT
My Saabs: '03 9-5 Aero, 08 9-3, '89 C900LM
Posts: 2,000
Default Meh.

Oh yes I forgot about this post. Because of the gear crunching after putting in the thick stuff, I thinned it by taking a quart of the mixture out and replacing it with another quart of redline MTL. When cool, the trans would still occasionally crunch going into third gear, but once it was hot it seemed to be OK. I think I'll go 100% redline MTL next race, although I ran the first race with the Pennzoil Synchromesh stuff (cheaper iirc) with perfectly smooth shifting all race.

That was also a different transmission, that may have been in better shape, than this, but the problems with third gear only started after putting in the thicker fluid. It was definitely a momentum botcher going into Canada corner realizing you were not in gear yet. Id say for now, the thin stuff might work out better.
__________________
24hrs of LeMons SAAB 900 project: The Carbeque Updated 3/19/14
Well....the car is apart. Time for that T5!
Reply With Quote Quick reply to this message
  #17  
Old 18th September 2012
Cark's Avatar
Cark Cark is offline
Saab Lunatic
 
Join Date: Sep 2003                                                
Location: Woodstock, NH
My Saabs: 03 Aero Wagon 5 spd, 85 turbo 3dr 5 spd
Posts: 1,694
Default

So you think the Lucas thickens things up a bit too much? I'm going to be changing the fluid out in my 85 (road car, not track) soon and definitely would like to know the best recipe!
Reply With Quote Quick reply to this message
  #18  
Old 27th September 2012
Tailspin's Avatar
Tailspin Tailspin is offline
Saab Lunatic
 
Join Date: Mar 2008                                                
Location: Ellington, CT
My Saabs: '03 9-5 Aero, 08 9-3, '89 C900LM
Posts: 2,000
Default

All transmissions are different, and mine isn't exactly prestine...but it does seem to prefer a thinner oil. Redline MTL would probably do the trick, but I may go back to the pennzoil synchromesh stuff you can get at all the chains as it seemed to work.
__________________
24hrs of LeMons SAAB 900 project: The Carbeque Updated 3/19/14
Well....the car is apart. Time for that T5!
Reply With Quote Quick reply to this message
  #19  
Old 27th September 2012
Salna Salna is offline
Junior Member
 
Join Date: Jun 2012                                                
Location: Chicago, IL
My Saabs: 85 SPG, 91 C900 Turbo
Posts: 22
Default

I recently acquired a reman'd Eriksson transmission, still in its original shipping box. The case has sharpie writing on it to only use engine oil. I asked the Saab mechanic I bought it from about it, he's used only engine oil his entire career because he thinks the thicker stuff won't flow as well. I want to try industrial gear oil and an oil cooler next.
Reply With Quote Quick reply to this message
  #20  
Old 27th September 2012
Tailspin's Avatar
Tailspin Tailspin is offline
Saab Lunatic
 
Join Date: Mar 2008                                                
Location: Ellington, CT
My Saabs: '03 9-5 Aero, 08 9-3, '89 C900LM
Posts: 2,000
Default

^more support for a thinner oil, although I don't think I'd go as thin as motor oil.
__________________
24hrs of LeMons SAAB 900 project: The Carbeque Updated 3/19/14
Well....the car is apart. Time for that T5!
Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
Reply

Bookmarks

Quick Reply
Message:
Options

Register Now

In order to be able to post messages on the SaabCentral Forums forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.
User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.
Password:
Confirm Password:
Email Address
Please enter a valid email address for yourself.
Email Address:

Log-in

Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.



Thread Tools
Display Modes

Posting Rules
You may post new threads
You may 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
Fluid recommendations for race car Tailspin C900 Performance, Mods & Tuning 11 19th October 2010 12:39 AM
Trans. fluid 05Aero21 9-5 Workshop 6 23rd August 2010 09:29 PM
Trans fluid vpfalcon 9-5 Workshop 11 25th November 2009 12:32 AM
trans fluid gini 9000 Workshop 0 15th May 2008 01:06 PM
pride race against trans am goincb89 NG900 & OG9-3 Performance, Mods & Tuning 33 6th November 2007 01:31 PM


All times are GMT -4. The time now is 10:23 PM.



Powered by vBulletin® Copyright ©2000 - 2014, vBulletin Solutions, Inc.

top of page | sitemap | email us



copyright © 2003 - 2011 saabcentral.com, All rights reserved http://www.whiter.co.uk - valid xhtml - valid css
SaabCentral is an independently run website and is not affiliated in any way to Saab Automobile AB.


Garage Plus vBulletin Plugins by Drive Thru Online, Inc.