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Old 02-08-2008, 10:32 PM   #1
timka86
6 Speed GT
 
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AKA: Tim
Join Date: Jul 2005
Location: Glendale Heights, IL
Age: 31
Posts: 645
Vehicle: 2005 G35 Sedan 6MT
timka86 Gettin' there
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HOW TO: Intstall a 6 speed in a GA GT

Cost wise, I've spent right about $3000. some of these costs were needed to see if the parts would work. Like the spare block I bought for a mock up, spare grand am axle, center console(which is identicle to the auto GA console).
More pictures are available at http://s51.photobucket.com/albums/f3...0SWAP/?start=0

Parts needed:

15296500 shifter
55351918 shifter cables to transmission bracket
22668353 passenger side axle (G6)
10357933 intermediate axle shaft (G6)
15823114 parking cable assembly - ignition (is not necessarily needed, will explain later)
15296498 shift knob
15296501 spring for reverse shift
15296499 shift boot assembly
21018899 trans fluid (sold in 6 quarts)
15788845 shifter cable assembly (both cables and firewall grommet)
15840117 alternate P/N - for shifter cables (these were backordered)
22708444 rear trans mount
10357932 Driver's side axle
94' 3.1L sunbird stickshift flywheel (i believe 91-94 should all work) Fidanza makes aluminum 8 lb version as well)
Clutch pedal assembly from 99-05 5spd grand am
hydrolic clutch cylinder from 99-05 5spd grand am
tuning software (dhp or hptuners) I'll be using DHP
clutch assembly and aluminum spacer from V8 Archie part #VA884F (www.v8archie.com)

transmission information:
F40 transmission (MT2 or MU9) only difference is gear ratios:

2006 F40 (MT2)
Type: transverse front wheel drive, six
speed manual transaxle
Engine range: 3.9L
Maximum engine torque: 245 lb-ft ( 333 Nm )
Maximum gearbox torque: 295 lb-ft ( 400 Nm )
Gear ratios: MT2
First: 3.77
Second: 2.04
Third: 1.32
Fourth: 0.95
Fifth: 0.76
Sixth: 0.62
Reverse: 3.54
Final Drive 3.55
Maximum validated gross vehicle weight: 3527 lb ( 1600 kg )
Case material: aluminum
Center distance: 197 mm
Fluid type: Castrol BOT 0063
Transmission weight: 56 kg ( 123.5 lb )
Fluid capacity (approximate): 3.1L / 3.27 qt ( dry )
Power take off: no
Applications: Pontiac G6

2007 GME Germany F40 ( MU9 ) 04/04/06
Type: transverse front wheel drive, six-speed manual transaxle
Engine range: GM 3.9L V6 ( LZ9 )
Maximum engine torque: 245 lb-ft ( 333 Nm)
Maximum gearbox torque: 295 lb-ft ( 400 Nm )
Gear ratios: MU9
First: 3.769
Second: 2.040
Third: 1.365
Fourth: 1.048
Fifth: 0.846
Sixth: 0.707
Reverse: 3.538
Final Drive Ratio: 3.55
Maximum validated gross vehicle weight: 3527 lb ( 1600 kg )
Case material: aluminum
Center distance: 197 mm
Fluid type: Castrol BOT 0063
Transmission weight: wet: 56 kg ( 123.5 lb )
Fluid capacity (approximate): 3.1L / 3.27 qt. ( dry )
Power take off: no
Applications: Pontiac G6

a lot of the research was done on fiero forums, since they have been swapping this transmission in since about 05' when the G6 was introduced.

the G6 has a dual mass flywheel, which means it's thicker and heavier then your normal stickshift flywheel. To compensate for this, the option is to use an aluminum spacer to make the input shaft of the transmission reach the clutch.


these are pictures of the aluminum spacer, I can't take the credit for this invention Archie, from www.v8archie.com is responsible for it, I bought it from him, he's done a lot of 6 spd swaps and some that have the same flywheel spacing as my application, he has these custom made for him by Spec Clutches. It came with this clutch assembly.


it's a stage 4+ clutch.

So all of the above get's bolted to the FW and it's all good to go, no other modifications necessary.

More good news is that the clutch cylinder from the 99-05 5spd Grand Am's has the same fitting that connects to the hydrolic Throw Out (T.O.) brearing that the G6 does:



The 3.1L sunbird flywheel is the exact same size as the Grand Am stock flywheel, same # of teeth, so the stock starter can stay:
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EX-Owner and builder of the first ever 6 SPEED GRAND AM
http://www.grandamgt.com/forum/showthread.php?t=73212

Last edited by timka86; 05-17-2008 at 08:12 PM.
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