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Thread: 4T45 Transaxle(MN5) (V6,GT)

  1. #1
    suckit
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    4T45 Transaxle(MN5) (V6,GT)



    Type: four speed front-wheel-drive, electronically
    controlled, automatic overdrive transaxle
    with electronically controlled torque converter
    clutch

    Engine range: 3.0L - 3.4L

    Maximum engine torque: 205 lb-ft (278 Nm)

    Maximum gearbox torque: 325 lb-ft (440 Nm)

    Gear ratios: First: 2.95 Second: 1.62 Third: 1.00 Fourth: 0.68 Reverse: 2.14
    Maximum shift speed: 5800 rpm

    Maximum validated gross vehicle weight: 1990 kg (4347 lb)

    Case material: die cast aluminum

    Shift pattern: (2) two-way on/off solenoids

    Shift quality: variable bleed solenoid

    Torque converter clutch: pulse width modulated solenoid control

    Converter size: 245mm (reference) (diameter of torque
    converter turbine)

    Fluid type: DEXRON VI

    Dry: 74.7 kg (164 lb)

    Wet: 85.1 kg (187.6 lb)

    Fluid capacity (approximate): bottom pan removal: 7L (7.4 qt)

    Complete overhaul: 10L (10.6 qt)

    dry: 12.5L (13.2 qt)

    Transfer design: two-axis design, link chain assembly
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  2. #2
    suckit
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    Nice Pic

    I saved it.
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  3. #3
    any way i can get my hands on a more detailed schematic of the tranny.

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  5. #5
    suckit
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    Re: 4T45 Transaxle(MN5) (V6,GT)

    Delete me.
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    Re: 4T45 Transaxle(MN5) (V6,GT)

    Before you give me the I know...holy thread revival

    Anyway...can someone please confirm that the torque rating for the 4T45e is only 205 lb/ft
    If so, and please correct me if I'm wrong, it means that the trans was over powered from the factory as the LX9 has 222 lb/ft stock


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    Re: 4T45 Transaxle(MN5) (V6,GT)

    From the manual
    Maximum Engine Torque 4T45-E 215 lb ft

    According to Wikipedia the LX9 ranges from 213lb ft to 221lb ft. So I guess you are correct.
    Last edited by gface2k; 02-01-2011 at 09:05 PM.
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    Re: 4T45 Transaxle(MN5) (V6,GT)

    Paying someone to install parts on your car, and bragging about it being fast is like watching someone SMURF your wife, and being proud to raise the kids

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  9. #9
    suckit
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    Re: 4T45 Transaxle(MN5) (V6,GT)



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    Re: 4T45 Transaxle(MN5) (V6,GT)

    Bumpage
    Can anyone else confirm?

  11. #11
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    Re: 4T45 Transaxle(MN5) (V6,GT)

    Yea.. GM site says this as well..


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  12. #12
    suckit
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    Re: 4T45 Transaxle(MN5) (V6,GT)

    Enter: Sonnax

    http://www.sonnax.com/technical-library/transmission

    When I worked for Jasper Engines & Transmissions, these were the go-to guys for our Transmission division. The 45 is a little light on documentation, but the 65 has a bit more to peruse through!
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