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  1. #1
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    8 Speed In 2008 Magnum

    I've seen conflicting information on whether an 8 speed will fit in my 2008 Magnum. It appears the transmission tunnel is the same as the newer models.

    Floor Pan.jpg

    Part Number: 68089676AA
    Supersession(s): 04780787AB; 04780787AC; 68055843AA


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    2010 Challenger SRT-8 26K Miles
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  2. #2
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    Yes; if you have the skills, its pretty straight forward to install the later (8-spd) tunnels into the earlier platforms (the 05-08 tunnels would need to be modified)...
    Last edited by Hemissary; 02-18-2021 at 03:51 PM.
    2005 Magnum RT---Viper Venom Red----440ci Aluminum block----Short Runner Valve Intake--410mm BAER 6S Monoblock Extreme--Eibach Multi-Pro 2

    Custom--Grille Work--Hood--Headlights--Side View Mirrors--Rear Spoiler--Rear Diffuser--SRV Control System--Turbine Wheels


  3. #3
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    Quote Originally Posted by Hemissary View Post
    Yes; if you have the skills, its pretty straight forward to install the later tunnels into the earlier platforms.
    The tunnel part number is the same for my 2008 Magnum as the other cars up to 2021. So it should already have the correct tunnel in it. Right?

    Thanks,
    Richard

    2010 Challenger SRT-8 26K Miles
    2008 Magnum Project
    2007 Magnum R/T
    2004 Ram 2500

  4. #4
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    Quote Originally Posted by moparmusclebiz View Post
    The tunnel part number is the same for my 2008 Magnum as the other cars up to 2021. So it should already have the correct tunnel in it. Right?

    Thanks,
    Richard
    The work I've done to consider this mod, I recall the early tunnels need to be modded. I would suggest going to a Parts Counter to verify the PN...
    2005 Magnum RT---Viper Venom Red----440ci Aluminum block----Short Runner Valve Intake--410mm BAER 6S Monoblock Extreme--Eibach Multi-Pro 2

    Custom--Grille Work--Hood--Headlights--Side View Mirrors--Rear Spoiler--Rear Diffuser--SRV Control System--Turbine Wheels


  5. #5
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    Quote Originally Posted by Hemissary View Post
    The work I've done to consider this mod, I recall the early tunnels need to be modded. I would suggest going to a Parts Counter to verify the PN...
    I got the part number "04780787AC" from the 2008 LX parts manual I downloaded from this site. I went here 2008 Dodge Magnum Base 2.7L V6 Extension. Floor pan. Front, rear, mopar, center - 68089676AA | Chrysler Jeep Dodge City, McKinney TX and it shows the supersessions then if you select "What This Fits" then select "Show More" It lists everything that it fits and it's pretty much everything from 2008 to 2021.

    Could the edges where it fits to the rest of the floor pan be the same and the shape maybe a little different?

    2010 Challenger SRT-8 26K Miles
    2008 Magnum Project
    2007 Magnum R/T
    2004 Ram 2500

  6. #6
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    Quote Originally Posted by moparmusclebiz View Post
    I got the part number "04780787AC" from the 2008 LX parts manual I downloaded from this site. I went here 2008 Dodge Magnum Base 2.7L V6 Extension. Floor pan. Front, rear, mopar, center - 68089676AA | Chrysler Jeep Dodge City, McKinney TX and it shows the supersessions then if you select "What This Fits" then select "Show More" It lists everything that it fits and it's pretty much everything from 2008 to 2021.

    Could the edges where it fits to the rest of the floor pan be the same and the shape maybe a little different?

    The parts books here at LX will not reflect body / frame changes subsequent to 08' model year. Enter a specific 8sp-equipped platform at that utility and verify. Better yet - have a competent FCA Parts Person - actually look it up.

    2005 Magnum RT---Viper Venom Red----440ci Aluminum block----Short Runner Valve Intake--410mm BAER 6S Monoblock Extreme--Eibach Multi-Pro 2

    Custom--Grille Work--Hood--Headlights--Side View Mirrors--Rear Spoiler--Rear Diffuser--SRV Control System--Turbine Wheels


  7. #7
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    From all the vids I've watched with swaps, including a 06 Maggie, no one has changed the tunnel. They all say the 8 speed fits with out MODS.
    13 Chrysler 300S, Stock 17 RAM 6.4 BGE with TSP Stage 4 boosted Cam, AIT 18% OD pulley, E-force 2.62 pulley(12.2 lbs boost),, Fastman 84+4 mm throttle body, 1 7/8 kooks long tubes w/hi-flow cats, 3" Magnaflow Cat-back, FTI 2800 stall, Trans by Hellraiser, Dings Racing valve body and tune, Getrag 3.73, Walbro 400LPH, DW 65# inj. aluminum rad. SRT fans. Brembo upgrade. Stage one MOPAR springs, XIX X39 22x9 +15 - 22x10.5 +22 with NITTO NT555 265/35R22 - 295/30R22
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  8. #8
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    Quote Originally Posted by coanan View Post
    From all the vids I've watched with swaps, including a 06 Maggie, no one has changed the tunnel. They all say the 8 speed fits with out MODS.
    You just reminded me of the guy who put a 392 in a red Magnum; he R*R'd the tunnel and rearward structure from a donor car.
    2005 Magnum RT---Viper Venom Red----440ci Aluminum block----Short Runner Valve Intake--410mm BAER 6S Monoblock Extreme--Eibach Multi-Pro 2

    Custom--Grille Work--Hood--Headlights--Side View Mirrors--Rear Spoiler--Rear Diffuser--SRV Control System--Turbine Wheels


  9. #9
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    13 Chrysler 300S, Stock 17 RAM 6.4 BGE with TSP Stage 4 boosted Cam, AIT 18% OD pulley, E-force 2.62 pulley(12.2 lbs boost),, Fastman 84+4 mm throttle body, 1 7/8 kooks long tubes w/hi-flow cats, 3" Magnaflow Cat-back, FTI 2800 stall, Trans by Hellraiser, Dings Racing valve body and tune, Getrag 3.73, Walbro 400LPH, DW 65# inj. aluminum rad. SRT fans. Brembo upgrade. Stage one MOPAR springs, XIX X39 22x9 +15 - 22x10.5 +22 with NITTO NT555 265/35R22 - 295/30R22
    Thanks Jay Z thanked for this post

  10. #10
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    Quote Originally Posted by coanan View Post
    Thanks coanan; did that gentleman ever install a 6-spd in something?
    2005 Magnum RT---Viper Venom Red----440ci Aluminum block----Short Runner Valve Intake--410mm BAER 6S Monoblock Extreme--Eibach Multi-Pro 2

    Custom--Grille Work--Hood--Headlights--Side View Mirrors--Rear Spoiler--Rear Diffuser--SRV Control System--Turbine Wheels


  11. #11
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    I thought you needed to piggy back the TCM or the ECM with a controller that knew you were running an HP90 and no longer had a NAG1.
    This guy does the conversion software.. and also performance valve bodies for NAG1s.
    Sound German Automotive
    Last edited by netnathan; 02-18-2021 at 08:51 PM.
    Net is where I be......Nathan is me
    *
    2006 Charger SRT8
    Inferno Red (Just a blur to most folks) with All Factory Options / Groups, SRT8 Mats, Side moldings/rear ram's head shaved
    Billet Technology all over + valve covers and coil covers, KillerGlass Pipe, LMI FIV CAI, 180 Tstat, Magnaflow 3" exhaust
    MPR Motorsports built 6.1 based/392 NA Stroker, BBK 85mm TB, TranZformer, Kooks Long Tubes, 3.70 LSD Hellcat rear cradle
    BCR coilovers with Hotchkis sways and Nitto 245/45/20F - 295/40/20R NT555-G2 paws


  12. #12
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    holy cow, A 8speed in my 300 would actually be so sweet just bc of my 3.91

  13. #13
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    Quote Originally Posted by netnathan View Post
    I thought you needed to piggy back the TCM or the ECM with a controller that knew you were running an HP90 and no longer had a NAG1.
    This guy does the conversion software.. and also performance valve bodies for NAG1s.
    Sound German Automotive

    When I chatted last year with Hell Raiser performance (HRP), they had perfected the transition / marriage of the two OEM programs to make it seamless. It kinda threw a wrench on my idea of putting a 6sp in the Magnum, as the performance gains of the HP would be huge. I'm waffling on the joy of rowing gears or the added performance of an HP.

    Its also worth mentioning that HRP has designed some incredibly strong replacement parts to build a very strong HP transmission...
    Last edited by Hemissary; 02-22-2021 at 01:09 AM.
    2005 Magnum RT---Viper Venom Red----440ci Aluminum block----Short Runner Valve Intake--410mm BAER 6S Monoblock Extreme--Eibach Multi-Pro 2

    Custom--Grille Work--Hood--Headlights--Side View Mirrors--Rear Spoiler--Rear Diffuser--SRV Control System--Turbine Wheels

    Thanks Jay Z thanked for this post

  14. #14
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    Quote Originally Posted by Hemissary View Post

    When I chatted last year with Hell Raiser performance (HRP), they had perfected the transition / marriage of the two OEM programs to make it seamless. It kinda threw a wrench on my idea of putting a 6sp in the Magnum, as the performance gains of the HP would be huge. I'm waffling on the joy of rowing gears or the added performance of an HP.

    Its also worth mentioning that HRP has designed some incredibly strong replacement parts to build a monster transmission...
    You should call and talk to the guy at Sound German Automotive. He is pretty knowledgeable
    Net is where I be......Nathan is me
    *
    2006 Charger SRT8
    Inferno Red (Just a blur to most folks) with All Factory Options / Groups, SRT8 Mats, Side moldings/rear ram's head shaved
    Billet Technology all over + valve covers and coil covers, KillerGlass Pipe, LMI FIV CAI, 180 Tstat, Magnaflow 3" exhaust
    MPR Motorsports built 6.1 based/392 NA Stroker, BBK 85mm TB, TranZformer, Kooks Long Tubes, 3.70 LSD Hellcat rear cradle
    BCR coilovers with Hotchkis sways and Nitto 245/45/20F - 295/40/20R NT555-G2 paws

    Thanks Hemissary thanked for this post
    Likes Jay Z liked this post

  15. #15
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    Quote Originally Posted by Hemissary View Post

    When I chatted last year with Hell Raiser performance (HRP), they had perfected the transition / marriage of the two OEM programs to make it seamless. It kinda threw a wrench on my idea of putting a 6sp in the Magnum, as the performance gains of the HP would be huge. I'm waffling on the joy of rowing gears or the added performance of an HP.

    Its also worth mentioning that HRP has designed some incredibly strong replacement parts to build a monster transmission...

    Yea, the thought of a six speed has been rattling around in my brain too. One of those Hellcat 6spd from Cleveland looks very enticing.

    I think I'm going to try and find a complete rear end wrecked '15 to '19 Scat Pack Charger. I would like to put the Charger dash, interior and front end into my Magnum. Dash shouldn't be a problem (the guy on YouTube bolted a Challenger dash in his) and I've read that at least the Charger front door panels will fit, don't know about the rear doors yet. I would love to also put the front clip on if it doesn't require a lot of cutting and fitting. My body work skills are almost nonexistent. I've already got the rear subframe and suspension from a 2019 Scat Pack with only 4000 miles on it.

    Would also like to have the 1320 Adaptive Suspension and transbrake so maybe find a wrecked Challenger to get the electronics off of then find a Charger for the other parts.

    Just have to see what I can find.
    Last edited by moparmusclebiz; 02-19-2021 at 05:11 PM.

    2010 Challenger SRT-8 26K Miles
    2008 Magnum Project
    2007 Magnum R/T
    2004 Ram 2500
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