I imagine a saab but what model?

 

i am not positive but pretty sure its the saab 9-3, idk what years

 

I dug this up off of a GM website.

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2007 Model Year Summary
General Motors Powertrain – Europe F35 five-speed manual car transaxle

● There are no changes for the 2007 Model Year


LOW MAINTENANCE

The MU3 uses a Castrol Burmah (BOT 0063) manual transmission fluid, and is validated as "fill-for-life". No maintenance is required for normal operation.

OVERVIEW

The F35 is a Saab-designed five-speed manual transaxle built in Saab’s Gothenburg, Sweden, powertrain plant. This extensively tested manual transmission was originally introduced in the 1984 Saab 9000, and today it is used in the Saab 9-3 and 9-5, Saturn Ion Red Line, Chevrolet Cobalt SS and on various Opel applications.

The F35 features a two-axis conventional transverse layout, fully synchronized gears, and compact packaging. It features higher torque carrying capacity than many other manual transaxles currently in use in North American small cars.

Different versions of the transaxle are available, depending upon application. Both cable and rod shift mechanisms are available, as well as application-specific clutch housings. The MU3 and MC2 are differentiated by ratios (see specs), with the MC2 available with a lower top-gear ratio.

Design features include triple-cone synchronizers on 1st and 2nd gears, and single-cone synchronizers for 3rd, 4th, 5th and reverse gears.

A limited-slip differential is available for high-output applications. This torque-sensing differential is an all-mechanical geared unit that uses no clutch packs or preloading to transfer torque from one axle to the other, and torque transfer occurs automatically when one wheel loses traction. Torque transfer also occurs gradually, without steps.

 

Would it be possible to use a final drive ratio out of say the F40 in the F35?

 

Just upgrade to the ~4.46 final drive out of the Grandam cup cars. It's a GM part that you can buy. Sorry lost the part number when charlie ate my Buildbook.

 

I don't want to go up.. I want to go down. To a 3.55 in the F40

 

what's the stock final drive?

 

4.05

Our gearset with the stock 4.05 final drive at 7000rpm :

1st : 37
2nd : 72
3rd : 107
4th : 142
5th : 181

80mph at 3100 in 5th gear

3.55 Final Drive :

1st : 43
2nd : 82
3rd : 122
4th : 162
5th : 206

80mph at 2700 in 5th gear

 

So you'd rather optimize for good cruising over acceleration? Or are you hoping that a lower final drive would decrease wheelhop/spin in 1st?

 

Then why change final drive, why not just change 1st gear?

 

Hmm... well... I'd look at a Saab 9-3 transmission. They come with a 3.53:1 final drive... right up your alley.

 

Gas mileage on the freeway.

 

Our gears are too short for the power we are making. 1st gear is seriously useless and going to a longer final ratio would actually make 1st gear useable with street tires.

Because i hate cruising at 80mph over 3000rpm.

Thanks raine. Will look into it

 

what ye

 

While I enjoy the enthusiasm to figure out what year works for that post, the post was made in 2007, I doubt the user has thought of this page for years.