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7th Gen Drivetrain Transmissions, clutches, and axles.

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Old 11-22-2009, 07:48 PM   #1 (permalink)
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Transmission Swap Question

Hopefully it doesn't come down to this but I want to be prepared just in case. I may need to replace a 2003 Impala transmission. It is a 3.4L car. From my research it looks like only a 2003 Impala or Reagal tranny will work, is that correct? Does it have to be from a 3.4L car?

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Old 11-22-2009, 07:53 PM   #2 (permalink)
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Any 3.4L engine vehicle will be direct fit. That includes Grand Ams, Impalas, Monte Carlos, or older Grand Prixs.

Any Wbody vehicle trans will be close to a direct fit but the gear ratio may be different. So any Grand Prix, Regal, Monte, Imp, Grand Am, Bonneville that's front wheel drive will work. You just might have to get the new gears and shift points programmed into the PCM.

In short, you're looking for a 4T65E transmission. Typical gear ratios are 2.93, 3.05, 3.29, and 3.29HD. Most base Impalas are 3.05.

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4. Swapping a 3.8V6 Supercharged into an 05 Base Impala.
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Old 11-22-2009, 08:04 PM   #3 (permalink)
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Quote:
Originally Posted by wanderson75 View Post
Any 3.4L engine vehicle will be direct fit. That includes Grand Ams, Impalas, Monte Carlos, or older Grand Prixs.

Any Wbody vehicle trans will be close to a direct fit but the gear ratio may be different. So any Grand Prix, Regal, Monte, Imp, Grand Am, Bonneville that's front wheel drive will work. You just might have to get the new gears and shift points programmed into the PCM.

In short, you're looking for a 4T65E transmission. Typical gear ratios are 2.93, 3.05, 3.29, and 3.29HD. Most base Impalas are 3.05.
So even older and newer models will work? Exactly how broad is the year range?

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Old 11-23-2009, 06:27 AM   #4 (permalink)
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http://en.wikipedia.org/wiki/GM_4T60...mission#4T65-E

Applications:

M15
1997 Pontiac Grand Prix 3.4 DOHC V6
1997–2003 Chevrolet Lumina/Monte Carlo V6 3.4 L/3.8 L
1997–2003 Chevrolet Venture V6 3.4 L
2000–2003 Chevrolet Impala V6 3.4 L/3.8 L
1997–2001 Chevrolet Lumina/Monte Carlo V6 3.1 L
1998-2002 Oldsmobile Intrigue V6 3.8 L
1997-2003 Pontiac Grand Prix V6 3.1 L/3.8 L

3.29:1 M15
Buick Terraza
Chevrolet Uplander
Pontiac Montana SV6
Saturn Relay

3.29:1 M76
Buick Rendezvous
Chevrolet Impala 9C1
Oldsmobile Aurora V6
Oldsmobile Intrigue Autobahn Package/PCS
Oldsmobile Silhouette
Pontiac Aztek

2.86:1 or 3.05:1 M15
Buick LeSabre
Chevrolet Impala LA1
Chevrolet Monte Carlo LA1

3.05:1 MN3
1997-2004 Buick Regal V6 3.8 L LS/LSE
1997-2005 Buick Park Avenue V6 3.8 L
1999-2002 Oldsmobile Intrigue V6 3.5 L

2.92:1 M15
Buick LaCrosse
Pontiac Bonneville

3.69:1 M76
Buick Terraza
Buick Rendezvous
Chevrolet Uplander
Pontiac Aztek
Pontiac Montana SV6
Saturn Relay


4T65E-HD
The 4T65E-HD (code MN7) is a heavy duty version of the 4T65-E used with V8 engines like the LS4 V8 and L67/L32 supercharged V6.

Applications:

2.93:1 MN7
Pontiac Bonneville SSEi L67
Chevrolet Impala L67
Chevrolet Monte Carlo L67
Pontiac Grand Prix GTP
Buick Regal GS
Buick Riviera L67 (97-99)

3.05:1 MN7
Buick Park Avenue Ultra

3.06:1 MN7
Chevrolet Impala SS
Chevrolet Monte Carlo SS

3.29:1 MN7
Buick Regal GSX (SLP)
Pontiac Grand Prix GTP Comp G
Pontiac Grand Prix GXP

However, if you have an '03...go with an '03 or later trans...The internal wiring changed after '02 IIRC.

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in·sane   /ɪnˈseɪn/ Show Spelled[in-seyn] Show IPA
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2. of, pertaining to, or characteristic of a person who is mentally deranged: insane actions; an insane asylum.
3. utterly senseless: an insane plan.
4. Swapping a 3.8V6 Supercharged into an 05 Base Impala.
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Old 11-23-2009, 07:10 AM   #5 (permalink)
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Awesome, thanks for all the help!!

So that means if her 2003 trans needs replaced I'm looking for the following it appears...

2003 Chevrolet Lumina V6 3.4 L/3.8 L
2003 Chevrolet Monte Carlo V6 3.4 L/3.8 L
2003 Chevrolet Venture V6 3.4 L
2003 Chevrolet Impala V6 3.4 L/3.8 L
2003 Pontiac Grand Prix V6 3.1 L/3.8 L
2003-2004 Buick Regal V6 3.8 L LS/LSE
2003-2005 Buick Park Avenue V6 3.8 L

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Old 11-23-2009, 07:51 AM   #6 (permalink)
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Yep. Anytime.

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in·sane   /ɪnˈseɪn/ Show Spelled[in-seyn] Show IPA
–adjective
1. not sane; not of sound mind; mentally deranged.
2. of, pertaining to, or characteristic of a person who is mentally deranged: insane actions; an insane asylum.
3. utterly senseless: an insane plan.
4. Swapping a 3.8V6 Supercharged into an 05 Base Impala.
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Old 01-08-2010, 05:18 PM   #7 (permalink)
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hey i wanted to ask a question. i have a 2004 chevy impala base 3.4, my trans has recently started shifting really hard. BUT it doesnt do it all the time. it goes back to shifting really smooth usually after i restart the car. is it my PCM or BCM or is my trans really going bad?

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Old 01-09-2010, 10:48 AM   #8 (permalink)
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prob the trans/epc solenoid

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Old 01-11-2010, 04:26 PM   #9 (permalink)
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Old 01-11-2010, 07:42 PM   #10 (permalink)
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i dont know much bout that generation

my advice to you is get a hanes manual at any car part store

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Old 01-13-2010, 09:58 AM   #11 (permalink)
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Quote:
Originally Posted by BIGHOMIELEX View Post
my advice to you is get a hanes manual at any car part store
Haynes manual won't tell you anything about the internals of the 4t65e.

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in·sane   /ɪnˈseɪn/ Show Spelled[in-seyn] Show IPA
–adjective
1. not sane; not of sound mind; mentally deranged.
2. of, pertaining to, or characteristic of a person who is mentally deranged: insane actions; an insane asylum.
3. utterly senseless: an insane plan.
4. Swapping a 3.8V6 Supercharged into an 05 Base Impala.
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