Gettinausernamesucks

Everything you want to know about applications and ratings you will find here.
The current rating is 260 FT LBS and 260 HP
This is the same coverage document for the Cobalt SS

http://media.gm.com/us/powertrain/en...2009/09car.htm

2009 GME F35 (MU3)

2009 Model Year Summary
GME 5 speed manual transmission

• In house manufactured limited slip differential for turbo applications (optional)
• New external shift system

The Chevrolet HHR SS turbo application launches with the F35 4.05 final drive. And now, we are announcing the Chevrolet Cobalt SS with the GME F35 (MU3) 5 speed manual introduced at SEMA 2007. The external shifter system for both applications has been improved with shorter travel and smoother gating.

Carryover Summary shown below

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 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.

1BADSS/SC

Based on what Ive read about the tranny, 350 WHP is a safe bet. Anything past that will be OK, but wont last as long.

Gettinausernamesucks

Pimp
Its a struggle sometimes to keep your arms around 75+++ different models all at the same time on several different continents.

Another little tidbit. This trans was origionally designed by SAAB Sweden and Getrag only manufacturers it.

1BADSS/SC

Just put my tranny in it

Nothing better than a Getrag 6 speed

Gettinausernamesucks

Did you use a SAAB F40 tranny or a Quaife F35 6 spd conversion?

rnjmur

My numbers are accurate, they are directly from GM. Those numbers are from the F35 up to the 2007 model years with the 4.05:1 final drive. If they have made modifications to the transmission (i.e. they changed the final drive to 3.82) they may have raised the torque limits of the transmission. I haven't been able to find any specifics on the F35 in the 2008 and up Cobalt SS/TC. If I had to guess I would say they either "retested" the transmission and raised the limit, or modifications have made stronger allowing them to retest it for higher torque. I am going to see if I can't track down some kind of official word on it.

red_line_cobalt

not sure if it has been covered... but they are not the same trans...

and who ever said they have seen 400HP SCs with the stock trans' hold up... i wanna see that... and on that note i have seen stock SS SCs blow the transmissions with no mods and low miles...