Saab 9-3 6-speed manual
#26
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Hmm...I don't know about a lot of people on here...but at higher power levels...the last thing we need is a shorter 1-3...launching is hard enough and burning though 1 and most of 2 is almost a certanty as is...no thanks...
#28
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1500??? Unless you're on super flat surfaces with near no drag and a back wind...you'll just be overworking your engine. I'd say if you could get it down to 2200-2300 that would be acceptable. But the SS/SC is a little different gearing than the TC cuz at 65 mph I'm usually sitting at like 2400ish...so if you could just get our final drive that would be your best bet. 1500rpm cruising is just silly...we don't have a V8
#29
Former Vendor
I put together a chart to compare the Saab 6 speed with LSJ and LNF transmissions.
Trans Compare
Saab LSJ LNF
1 3.77 3.38 3.38
2 2.04 1.76 1.76
3 1.37 1.18 1.18
4 1.05 .89 .89
5 .85 .70 .70
6 .71
Final 3.55 4.05 3.82
Overall
1 13.38 13.69 12.91
2 7.24 7.13 6.72
3 4.86 4.78 4.51
4 3.73 3.60 3.40
5 3.02 2.84 2.67
6 2.52
7k shifts
1-2 36.6 35.8 38.0
2-3 67.7 68.7 72.9
3-4 100.8 102.5 108.6
4-5 131.4 136.1 144.1
5-6 162.3 172.5 183.5
6 194.4
RPM at 70
5 3019 2841 2670
6 2521
Trans Compare
Saab LSJ LNF
1 3.77 3.38 3.38
2 2.04 1.76 1.76
3 1.37 1.18 1.18
4 1.05 .89 .89
5 .85 .70 .70
6 .71
Final 3.55 4.05 3.82
Overall
1 13.38 13.69 12.91
2 7.24 7.13 6.72
3 4.86 4.78 4.51
4 3.73 3.60 3.40
5 3.02 2.84 2.67
6 2.52
7k shifts
1-2 36.6 35.8 38.0
2-3 67.7 68.7 72.9
3-4 100.8 102.5 108.6
4-5 131.4 136.1 144.1
5-6 162.3 172.5 183.5
6 194.4
RPM at 70
5 3019 2841 2670
6 2521
#30
Looking at the numbers Matt has provided.... looks like a complete waste of money and ridiculous thing to do. You'd have even more a pain in the ass time launching and only gain 149 RPM for cruising.
#32
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I'll stick with my stock trans. I get awesome gas mileage
@70-75 I get ~35mpg
@55-60 ~40mpg
even when I'm with good traffic and doing better than 80 I still get ~32-33 mpg usually
Like I said before, the only way I'd consider dicking with my trans would be for a longer 1st gear and maybe slight tweaks to 2nd and 3rd.
6spd on our cobalts just doesn't make sense with our powerband
@70-75 I get ~35mpg
@55-60 ~40mpg
even when I'm with good traffic and doing better than 80 I still get ~32-33 mpg usually
Like I said before, the only way I'd consider dicking with my trans would be for a longer 1st gear and maybe slight tweaks to 2nd and 3rd.
6spd on our cobalts just doesn't make sense with our powerband
#33
Former Vendor
Added the Quaife and switched to 7500 shifts
Trans Compare
-------------------Saab-------------LSJ--------------LNF-------Quaife/LSJ
1------------------3.77-------------3.38-------------3.38------------3.00
2------------------2.04-------------1.76-------------1.76------------1.93
3------------------1.37-------------1.18-------------1.18------------1.37
4------------------1.05--------------.89---------------.89------------1.05
5-------------------.85---------------.70---------------.70-------------.83
6-------------------.71---------------------------------------------------.70
Final-------------3.55--------------4.05-------------3.82------------4.05
Overall
1-----------------13.38-----------13.69-----------12.91-----------12.15
2------------------7.24-------------7.13-------------6.72------------7.82
3------------------4.86-------------4.78-------------4.51------------5.55
4------------------3.73-------------3.60-------------3.40------------4.25
5------------------3.02-------------2.84-------------2.67------------3.36
6------------------2.52-------------------------------------------------2.84
7500 shifts
1-2----------------39.2------------38.3-------------40.7-------------43.1
2-3----------------72.4------------73.5-------------78.0-------------67.0
3-4---------------107.9----------109.7------------116.2-------------94.5
4-5---------------140.6----------145.6------------154.2-----------123.4
5-6---------------173.7----------184.6------------196.3-----------156.0
6-----------------208.0-----------------------------------------------184.6
RPM at 70
5-----------------3019------------2841------------2670------------3361
6-----------------2521------------------------------------------------2841
Trans Compare
-------------------Saab-------------LSJ--------------LNF-------Quaife/LSJ
1------------------3.77-------------3.38-------------3.38------------3.00
2------------------2.04-------------1.76-------------1.76------------1.93
3------------------1.37-------------1.18-------------1.18------------1.37
4------------------1.05--------------.89---------------.89------------1.05
5-------------------.85---------------.70---------------.70-------------.83
6-------------------.71---------------------------------------------------.70
Final-------------3.55--------------4.05-------------3.82------------4.05
Overall
1-----------------13.38-----------13.69-----------12.91-----------12.15
2------------------7.24-------------7.13-------------6.72------------7.82
3------------------4.86-------------4.78-------------4.51------------5.55
4------------------3.73-------------3.60-------------3.40------------4.25
5------------------3.02-------------2.84-------------2.67------------3.36
6------------------2.52-------------------------------------------------2.84
7500 shifts
1-2----------------39.2------------38.3-------------40.7-------------43.1
2-3----------------72.4------------73.5-------------78.0-------------67.0
3-4---------------107.9----------109.7------------116.2-------------94.5
4-5---------------140.6----------145.6------------154.2-----------123.4
5-6---------------173.7----------184.6------------196.3-----------156.0
6-----------------208.0-----------------------------------------------184.6
RPM at 70
5-----------------3019------------2841------------2670------------3361
6-----------------2521------------------------------------------------2841
Last edited by Matt M; 02-22-2010 at 02:19 PM.
#34
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looked into this for a long time, things that would need to be addressed, verifying axle splines are the same, motor mounts, shift cables. personally its not wrth the effort when i can get an LNF trans with a better final drive. the other thing is they are supposedly not the best trans iirc, shifting issues, noisy.
personally, if your gonna spend the cash...............http://www.xtrac.com/Product%20Specifications.htm#516
personally, if your gonna spend the cash...............http://www.xtrac.com/Product%20Specifications.htm#516
#35
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What do you use your car for most? Are you looking for economy, straight line acceleration or road course performance? If you are looking for straight line you would probably be better off just sticking with the 5 speed. The 6 speed would be unique, but for the money you will spend on it you could have enormous performance gains.
#36
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ive always thought about this swap....yes it will def fit...i currently own an 06 saab 93...and its always going through my head to either get the 5 speed auto or the 6 speed manual....it would be so awesome...but ive never actually sat down to research it...but yes it will def bolt on
#37
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gas milage
LSJ>LNF
#38
Senior Member
Theres no point , our cars makes good power across the power band so shorter gears are not needed ,and will make it harder to hook up. An overdrive would be nice for highway cursing, but i get about 28-30 mpg cursing at 75-80 on the highway i don't see it getting any better.
Look at the mazdaspeed3 its a 6 speed and it has to cut boost in 1st 2nd and part of 3rd. plus less time shifting = more time accelerating.
Look at the mazdaspeed3 its a 6 speed and it has to cut boost in 1st 2nd and part of 3rd. plus less time shifting = more time accelerating.
#39
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my question is, the possibility and ease of changing the final drive ratio itself. Seeing that the Saab is at 3.55 I believe it was and the LNF I believe was at 3.82, could you just drop the LNF to a 3.55 and lower your cruising RPMs that way?
#40
Senior Member
You could but 2nd gear and 3rd gear would be even longer than they already are.
#41
The Quaife gearset is compatable with the 3.82, 4.05, & 4.45 Final drive ratios of the F35, not just the stock LSJ 4.05.
I have never heard 100% that the 3.55 Final out of the F40 will fit the F35 or not, but, even if it does, it would require a complete rebuild of the transmission to accomplish, so...
An LSJ with the LNF F35's 3.82 Final drive makes the most sense.
Especially if you're car wasn't factory equipped with the LSD.
Just swap the entire LSD LNF F35 3.82 transmission in as an assembly, and you're good to go.
I have never heard 100% that the 3.55 Final out of the F40 will fit the F35 or not, but, even if it does, it would require a complete rebuild of the transmission to accomplish, so...
An LSJ with the LNF F35's 3.82 Final drive makes the most sense.
Especially if you're car wasn't factory equipped with the LSD.
Just swap the entire LSD LNF F35 3.82 transmission in as an assembly, and you're good to go.
#42
Senior Member
The TC makes it's power over practically the whole RPM spread, from idle to redline. More gears = more work and more time wasted shifting. I'm kind of a lazy old dog and love the ability to use 1st, 3rd and 5th only. They're really all you need around town. 2nd and 4th just add unnecesaary weight to the car. But that's just ME.
#43
Senior Member
#46
There are strength advantages of the LNF F35 over the LSJ F35 according to GM.
The F40 is rated at 15 pound/feet or so more (maybe it is 20 as above, lol) than the LSJ F35, making it about even from what I've been told with the LNF F35. However, it does have a higher drivetrain loss than the F35 as well. Not very much, but a little more loss.
The F40 is rated at 15 pound/feet or so more (maybe it is 20 as above, lol) than the LSJ F35, making it about even from what I've been told with the LNF F35. However, it does have a higher drivetrain loss than the F35 as well. Not very much, but a little more loss.
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