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Thread: Big Power Manual Transmission (S6-53) Swap

  1. #1
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    Big Power Manual Transmission (S6-53) Swap

    Check Post #130 for Group buy and final kit details.

    ---

    We have been working on swapping in a S6-53 for a minute now and I think its time to share.. We have all the parts in production and will be testing this whole kit out soon.

    Background, What is the S6-53?
    In short its the most stout manual transmission produced by ZF. It's rated for roughly twice what the S5-31(zf320 that comes stock in the e36 328/M3) is rated for and 20% more than what the 420g is rated for. The transmission is used in many modern (HEAVY, TORQUEY) bmw's (e9x, f13, e64, etc) and is very available at the junkyard, and will be for years. This transmission was sold to BMW and bmw created variants for different model lines. This transmission is now being used in many swaps because of its reliability above 1000whp; There are kits for LS's, Diesels, etc. The transmissions are so plentiful, we paid $280 for our test box with <100k on it.

    In Europe the use of this gearbox is fairly common. Many will take and machine the bellhousing off of one of these to adapt it to their motors. Its well known to take huge abuse in race conditions.

    The variant we chose to use for this swap kit is a gas gear ratio, aligning nicely with our current gears, just slightly (~5%) taller, which is nice for our use. This change is like dropping from a 3.23 down to a 3.07. On a 26" tire @ 7200 it will net you roughly 4.5 mph in 4th on a 3.23 (144.6 mph), or 5.8 mph on a 3.15(148.3 mph)... Anyone just running out of gear?

    Gear Ratios Weight
    1 2 3 4 5 6 R (Lbs)
    GS6-53BZ
    4.055 2.396 1.582 1.192 1 0.872 3.677 121.8
    S5-31 4.21 2.49 1.67 1.24 1 - 3.85 77
    420G
    4.227
    2.528 1.669 1.226 1 0.828 3.746 105.5


    MPH Per Gear (26" Tire, 3.15 Diff, 7200 rpm)
    1 2 3 4 5 6
    GS6-53BZ
    43.60 73.79 111.76 148.32 176.80 202.75
    S5-31 42.00 71.00 105.87 142.58 176.80 -
    420G 41.83 69.94 105.93 144.21 176.80 213.53


    If this is so strong, why is no one doing it stateside?
    The transmission will not bolt up to m5x motors directly
    its 5" longer so no transmission mount will work directly
    It uses a very odd reversed pilot bearing setup, meaning no clutch will work directly


    What are you offering?
    The kit we will be offering will retain the factory m5x slave, fork, TOB, Pivot pin, transmission mounts and starter. The bellhousing adapter ring is CNC'd aluminum. The clutch is custom to make this all happen. It is a billet twin-disk and will be offered in an 850tq and 1000tq capacity disks. The diaphragm we are going with is only ~25% heavier (Pedal Force) than stock so it will be sporty but also very drivable. The pressure plate we are using here is the same unit used in many exotic turbo kits like from UGR. The transmission brace will be powder-coated-steel and included with the kit.

    Expected Kit contents:
    CNC Transmission adapter ring
    Laser cut, CNC bent Transmission Brace
    Complete Clutch kit, Disks by choice
    Shift linkage to fit m5x shifters.
    Mounting hardware, Dowel sleeves, Install Instructions.

    What You will need:
    Transmission (Easily attained for $400 or less)
    Driveshaft (We would like to eventually offer standard length but for now this is up to you guys)

    BONUS:
    This will facilitate a certain automatic swap...
    Last edited by vollosso; 05-04-2018 at 11:26 PM.
    1989 535i - sold
    1999 Tiag/Dove M3 - sold
    1998 Turbo Arctic/black - current
    2004 TiAg/Black - Current

    PTE6870 | 1.15 ar | Hp Cover, Custom Divided T4 bottom-mount, 3.5" SS exhaust, Fx725 twin ceramic, Dual Turbosmart Compgates, Turbosmart Raceport BOV, 3.5" Treadstone Intercooler, 3.5" Vibrant resonator and muffler, Arp 2k Headstuds | Main studs | 87mm Je pistons | Eagle rods | 9.2:1 static compression, Ces 87mm cutring, Custom solid rear subframe bushings, Akg 85d diff bushings, 4 clutch 3.15 diff, 14mm diff bolt conversion, Poly engine mounts, UUC trans W/ enforcers, Custom Ms41 id1700 E85 tune..... BUILD THREAD

  2. #2
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    Interested in this for sure.

    Ive been contemplating swapping my 420g setup into my auto m3 and go to something more durable like this. More affordable to replace as needed...

  3. #3
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    Finally a proper gearbox solution!!

  4. #4
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  5. #5
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    Why do you need an adapter ring? As I understand it, the N5x bolt pattern is the same as the M5x.

  6. #6
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    Quote Originally Posted by TheJuggernaut View Post
    Why do you need an adapter ring? As I understand it, the N5x bolt pattern is the same as the M5x.
    Unfortunately it’s not, wish I could’ve skipped that step.




    Sent from my iPhone using Tapatalk
    1989 535i - sold
    1999 Tiag/Dove M3 - sold
    1998 Turbo Arctic/black - current
    2004 TiAg/Black - Current

    PTE6870 | 1.15 ar | Hp Cover, Custom Divided T4 bottom-mount, 3.5" SS exhaust, Fx725 twin ceramic, Dual Turbosmart Compgates, Turbosmart Raceport BOV, 3.5" Treadstone Intercooler, 3.5" Vibrant resonator and muffler, Arp 2k Headstuds | Main studs | 87mm Je pistons | Eagle rods | 9.2:1 static compression, Ces 87mm cutring, Custom solid rear subframe bushings, Akg 85d diff bushings, 4 clutch 3.15 diff, 14mm diff bolt conversion, Poly engine mounts, UUC trans W/ enforcers, Custom Ms41 id1700 E85 tune..... BUILD THREAD

  7. #7
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    Looks promising to me. I had been planning the same thing.

  8. #8
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    This is the N54 transmission right?
    86 325es, 2.8L NV m50, S366, Megasquirt 2, e85, solid rear axle, 4 link, spool, T56 Magnum trans, 28x10.5w slicks, zip ties
    Best = 9.43 @ 149.15 mph, 1.30 60 foot 28 psi boost

  9. #9
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    Big Power Manual Transmission (S6-53) Swap

    Quote Originally Posted by someguy2800 View Post
    This is the N54 transmission right?
    Yes


    Sent from my iPhone using Tapatalk
    Last edited by vollosso; 04-02-2018 at 04:00 PM.
    1989 535i - sold
    1999 Tiag/Dove M3 - sold
    1998 Turbo Arctic/black - current
    2004 TiAg/Black - Current

    PTE6870 | 1.15 ar | Hp Cover, Custom Divided T4 bottom-mount, 3.5" SS exhaust, Fx725 twin ceramic, Dual Turbosmart Compgates, Turbosmart Raceport BOV, 3.5" Treadstone Intercooler, 3.5" Vibrant resonator and muffler, Arp 2k Headstuds | Main studs | 87mm Je pistons | Eagle rods | 9.2:1 static compression, Ces 87mm cutring, Custom solid rear subframe bushings, Akg 85d diff bushings, 4 clutch 3.15 diff, 14mm diff bolt conversion, Poly engine mounts, UUC trans W/ enforcers, Custom Ms41 id1700 E85 tune..... BUILD THREAD

  10. #10
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    I wonder if the same ring would work/be needed for a DCT swap for an M5x

  11. #11
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    Quote Originally Posted by TheJuggernaut View Post
    I wonder if the same ring would work/be needed for a DCT swap for an M5x
    :devilook


    Sent from my iPhone using Tapatalk
    1989 535i - sold
    1999 Tiag/Dove M3 - sold
    1998 Turbo Arctic/black - current
    2004 TiAg/Black - Current

    PTE6870 | 1.15 ar | Hp Cover, Custom Divided T4 bottom-mount, 3.5" SS exhaust, Fx725 twin ceramic, Dual Turbosmart Compgates, Turbosmart Raceport BOV, 3.5" Treadstone Intercooler, 3.5" Vibrant resonator and muffler, Arp 2k Headstuds | Main studs | 87mm Je pistons | Eagle rods | 9.2:1 static compression, Ces 87mm cutring, Custom solid rear subframe bushings, Akg 85d diff bushings, 4 clutch 3.15 diff, 14mm diff bolt conversion, Poly engine mounts, UUC trans W/ enforcers, Custom Ms41 id1700 E85 tune..... BUILD THREAD

  12. #12
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    In before the n54 6mt goes from $300 to $1200 like the 210mm Diff lol

    Sent from my SM-G930P using Tapatalk
    97 Turbo 3.2L M3 - Cutring / ARP - RSI Top Mount - Gt4088r - ID1300 - Tial WG - 22RPD Tuned - 93 Octane - 3.5" Stainless

  13. #13
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    That won't happen. 210 diff is 30 something years old. Plenty of these boxes to go around as said by OP. Awesome, should be a somewhat affordable kit.

  14. #14
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    Shooot... I would consider this just because it would be a smoother shifting transmission over what we currently have. Plus the 6th gear aspect plus the cost. Only thing I dislike is having to change out clutches since I just bought one not too long ago.

  15. #15
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    Hey, you missed the trans weights in your table!! :p

  16. #16
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    Quote Originally Posted by jakermac View Post
    Hey, you missed the trans weights in your table!! :p
    Haha I dont have an accurate 420g weight or I would have added it :p

    Is a monster in comparison to the zf320. 5” longer, probably 25% thicker. You guys should see the gears in these guys, they are twice as wide...



    Sent from my iPhone using Tapatalk
    1989 535i - sold
    1999 Tiag/Dove M3 - sold
    1998 Turbo Arctic/black - current
    2004 TiAg/Black - Current

    PTE6870 | 1.15 ar | Hp Cover, Custom Divided T4 bottom-mount, 3.5" SS exhaust, Fx725 twin ceramic, Dual Turbosmart Compgates, Turbosmart Raceport BOV, 3.5" Treadstone Intercooler, 3.5" Vibrant resonator and muffler, Arp 2k Headstuds | Main studs | 87mm Je pistons | Eagle rods | 9.2:1 static compression, Ces 87mm cutring, Custom solid rear subframe bushings, Akg 85d diff bushings, 4 clutch 3.15 diff, 14mm diff bolt conversion, Poly engine mounts, UUC trans W/ enforcers, Custom Ms41 id1700 E85 tune..... BUILD THREAD

  17. #17
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    Quote Originally Posted by jajou318 View Post
    Shooot... I would consider this just because it would be a smoother shifting transmission over what we currently have. Plus the 6th gear aspect plus the cost. Only thing I dislike is having to change out clutches since I just bought one not too long ago.
    Yeah that’s kinda the thought..

    Also opens up the 6hp21 for a ?700whp? cheap auto transmission.. probably good for 95% of all builds here.


    Sent from my iPhone using Tapatalk
    1989 535i - sold
    1999 Tiag/Dove M3 - sold
    1998 Turbo Arctic/black - current
    2004 TiAg/Black - Current

    PTE6870 | 1.15 ar | Hp Cover, Custom Divided T4 bottom-mount, 3.5" SS exhaust, Fx725 twin ceramic, Dual Turbosmart Compgates, Turbosmart Raceport BOV, 3.5" Treadstone Intercooler, 3.5" Vibrant resonator and muffler, Arp 2k Headstuds | Main studs | 87mm Je pistons | Eagle rods | 9.2:1 static compression, Ces 87mm cutring, Custom solid rear subframe bushings, Akg 85d diff bushings, 4 clutch 3.15 diff, 14mm diff bolt conversion, Poly engine mounts, UUC trans W/ enforcers, Custom Ms41 id1700 E85 tune..... BUILD THREAD

  18. #18
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    S5D-320Z 77.1 lbs
    420G 105.5 lbs
    GS6-53BZ 121.8 lbs
    Last edited by chikinhed; 04-03-2018 at 02:35 PM.

  19. #19
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    Quote Originally Posted by chikinhed View Post
    S5D 320Z 77.1 lbs
    420G 105.5 lbs
    GS6-53BZ 121.8 lbs
    Added It up there, also with a wheel speed chart.
    1989 535i - sold
    1999 Tiag/Dove M3 - sold
    1998 Turbo Arctic/black - current
    2004 TiAg/Black - Current

    PTE6870 | 1.15 ar | Hp Cover, Custom Divided T4 bottom-mount, 3.5" SS exhaust, Fx725 twin ceramic, Dual Turbosmart Compgates, Turbosmart Raceport BOV, 3.5" Treadstone Intercooler, 3.5" Vibrant resonator and muffler, Arp 2k Headstuds | Main studs | 87mm Je pistons | Eagle rods | 9.2:1 static compression, Ces 87mm cutring, Custom solid rear subframe bushings, Akg 85d diff bushings, 4 clutch 3.15 diff, 14mm diff bolt conversion, Poly engine mounts, UUC trans W/ enforcers, Custom Ms41 id1700 E85 tune..... BUILD THREAD

  20. #20
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    The 45lb extra is at least in a decent spot in the car. I don't think anyone would use this kit for anything other than high HP strength anyways

    Sent from my SM-G930P using Tapatalk
    97 Turbo 3.2L M3 - Cutring / ARP - RSI Top Mount - Gt4088r - ID1300 - Tial WG - 22RPD Tuned - 93 Octane - 3.5" Stainless

  21. #21
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    Not asking to get spoon fed but what would be a decent solution for the driveshaft? Local shops or something similar? Possible to shorten the stock one?

  22. #22
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    Big Power Manual Transmission (S6-53) Swap

    Quote Originally Posted by Mklock View Post
    Not asking to get spoon fed but what would be a decent solution for the driveshaft? Local shops or something similar? Possible to shorten the stock one?
    You could shorten the stock one ~5.625” but the guibo is larger so you’ll also need a 105-96mm guibo adapter.

    Im ordering a 335 driveshaft in hopes the front half will fit on the e36 rear to test out the kit. I eventually would like to have a 3.5” aluminum shaft built with machined adapter disks for the ends.


    Sent from my iPhone using Tapatalk
    Last edited by vollosso; 04-03-2018 at 01:51 PM.
    1989 535i - sold
    1999 Tiag/Dove M3 - sold
    1998 Turbo Arctic/black - current
    2004 TiAg/Black - Current

    PTE6870 | 1.15 ar | Hp Cover, Custom Divided T4 bottom-mount, 3.5" SS exhaust, Fx725 twin ceramic, Dual Turbosmart Compgates, Turbosmart Raceport BOV, 3.5" Treadstone Intercooler, 3.5" Vibrant resonator and muffler, Arp 2k Headstuds | Main studs | 87mm Je pistons | Eagle rods | 9.2:1 static compression, Ces 87mm cutring, Custom solid rear subframe bushings, Akg 85d diff bushings, 4 clutch 3.15 diff, 14mm diff bolt conversion, Poly engine mounts, UUC trans W/ enforcers, Custom Ms41 id1700 E85 tune..... BUILD THREAD

  23. #23
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    What will be the cost of this kit?

  24. #24
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    Quote Originally Posted by Mklock View Post
    Not asking to get spoon fed but what would be a decent solution for the driveshaft? Local shops or something similar? Possible to shorten the stock one?
    1
    When I went to a 6 spd, I had a few local shops not want to touch the two pieces driveshaft. I had to send it out to get cut and even the shop I sent it too didn't want to touch a 2pc for the same price I got charged (It was pretty cheap around $100-150).

  25. #25
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    Getting the prototype ring on the 17th. Clutch shortly after :devilook


    Sent from my iPhone using Tapatalk
    1989 535i - sold
    1999 Tiag/Dove M3 - sold
    1998 Turbo Arctic/black - current
    2004 TiAg/Black - Current

    PTE6870 | 1.15 ar | Hp Cover, Custom Divided T4 bottom-mount, 3.5" SS exhaust, Fx725 twin ceramic, Dual Turbosmart Compgates, Turbosmart Raceport BOV, 3.5" Treadstone Intercooler, 3.5" Vibrant resonator and muffler, Arp 2k Headstuds | Main studs | 87mm Je pistons | Eagle rods | 9.2:1 static compression, Ces 87mm cutring, Custom solid rear subframe bushings, Akg 85d diff bushings, 4 clutch 3.15 diff, 14mm diff bolt conversion, Poly engine mounts, UUC trans W/ enforcers, Custom Ms41 id1700 E85 tune..... BUILD THREAD

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