Part 11: 🛠️ Getrag 420G Secrets Unveiled 🚗 Teardown, Pro Tips & Hidden Facts They Don't Tell You!!!
The Getrag S6S 420G can handle over 368 lb⋅ft of torque and was on the following Models:
* 1996 - 1999 BMW E36 M3 (Euro)
* 2001 - 2006 BMW E46 M3.
* 1993 - 1996 BMW E34 540i and M5.
* 1996 - 2004 BMW E39 540i and M5.
* 1994 - 1998 BMW E38 7 Series.
* 1993 - 1999 BMW E31 8 series.
* 2000 - 2003 BMW E52 Z8.
Gear Ratios:
1 - 4.227
2 - 2.528
3 - 1.669
4 - 1.226
5 - 1.000
6 - 0.828
R - 3.746
1:05 Walkaround & What’s What
1:55 Removal: Springs & Detents
3:08 Removal: Bell Housing Removal
4:13 Overview: SMG to Manual Conversion
6:18 Removal: Tail Housing Countershaft Assembly
10:11 Removal: Main selector shaft detent
10:57 Alignment: Tail housing shift pins
11:44 Removal: Tail housing separation
13:08 Overview: Transmission Walk-Thru & Function
14:08 Overview: Reverse Gear Idle Subassembly
15:30 INTERMISSION - ALL THE PARTS LAID OUT
15:58 Install: Reverse Idle Gear Subassembly
16:46 Install: Main Taper Bearing
18:24 Install: Drain Hole Magnet & Tail Housing
20:01 Install: Countershaft & Pin Assembly
21:31 Install: Roller Bushing Selector Detent
22:07 Install: Bell Housing
22:59 Install: Detents for Remaining Shafts
25:01 Testing: Does it even work!?
Temperature Sensor 13621433076
Speed Sensor 12142296184 - Deleted for Manual Conversion due to CPS on S54 Block.
Reverse Switch 23147524811
Input Seal 23121228493
Shift Shaft Seal 23127501582
Output Seal 23121222769
6MT Rod Joint 25112229793
Main Shaft Locking Pin 233311282539
Blind Plug for Locking Pin 23317545771
Spring for Locking Pin 2311228397
Cover/Springs Repair Kit 23317506947
Fluid: Any GL4 MT-90 Fluid - 1.8 - 2.0 Liters Until Fluid comes out of fill hole. www.fcpeuro.com/products/gear...
SMG to 6spd Conversion Companies (Prices will change over time):
* AMS Motorsport - ($469 P/L + Ship) - amsautomotivegroup.com/collec...
* SMGSwap.com - ($489 P/L + Ship) - smgswap.com/
* MSport Parts - ($500 P/L + Ship) - www.msportparts.com/products/...
* Lang Racing - ($555 P/L + Ship) - store.langracing.com/products...
* VAC Motorsport - ($749 P/L + Ship + Cleaning Fee) - store.vacmotorsports.com/vac-...
* TySpeed Automotive - (Unknown) - tyspeed.com/smg-to-manual-con...
* European Auto Source - ($4k Full Convert) europeanautosource.com/produc...
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E30 & E36 N54 Swap Guides available for purchase!
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You Guys saved our Day, Week, Month and Year abnd alot of money, by posting and explaining the gearbox. THANK YOU GUYS SO F*ING MUCH !!
Seriously. Why does this channel not have 500k+ subs?! #jasoncammisa send this guy some love like your Bimmer rebuilder in Germany!
Awesome. The only thing I'm missing is a source for synchronizer parts. I imagine circlips and pressing things apart would be required to replace those. I've done a WC T5. Appreciate the video!
Phenomenal! Wish i had friends like you guys.. Mine are boring
Great job Frank. Very interesting. I never saw a 420G from the inside. Thanks for sharing. Have a great New Year's Eve with all your loved ones. It was a great year, Frank. Thanks for that. Dutch regards, Nico.
You're a brave man, I love this type of content. Give it a little how's your father is a term I am going to use from now on.
Great video!
e39 540i M sport owner here. THANK YOU!!
it was very useful exp, thank u
Good work
Excellent video, incredibly useful. Just took two apart with this on in the background. The stupid little pins in the 1-3-5 detent area absolutely ruined my life for a while. Noticed you didn't mention them upon reassembly- do they just mind their own business..?
Love it ❤
@Garageaholic Nice! You motivated me to open her up too. Iam in the progress of dismanteling the 420G SMG. I stumble upon some challenges. I seperated the bellhousing and the rear transmission. 1. The steel balls from the detents are stuck. You could easily remove the balls with a magnet. I can feel the magnet engage the steel ball, but wont budge. Seems like its not alligned to go out. 2. I suspect the shafts are blocked some how. Any advice to unlock it to neutral? I am not able to spin the shafts or shift in gears. CHeers! And keep up the content.
Nice tear down. If I could make a suggestion - the graphics should be saved for the beginning and end of the video. It’s very distracting to have the video cut to graphics over and over.
It’s broken out by chapter, it’s in the description so with you click on each chapter it shows what that chapter is about
Now if only someone could find me some new synchros!
Fearless Frank to the rescue. I've also heard that no parts are generally available for the 420G besides the detent repair kits. Probably some seals. Did you use Permatex Aviation III form a gasket for the case halves? I use it on paper style gaskets but I don't let it "set up" very long, but I would want to let it set up a bit longer for an application like this. I assume you painted it on the day before as it never gets fully cured like silicone. Think tree sap in January. I'd still be nervous and be reaching for the silicone (something like Ajusil etc) but many swear by the aviation including myself. I also use it as a thread sealant occasionally for say those drain and fill plugs. Probably just makes me feel better. Also works for air fittings in lieu of Teflon tape. I agree with the other commenter that you deserve more subscribers, I won't name names but some other channels have viewers who seem so desperate to overdo it with the praise and they're doing less real work (unnecessary constant oil and fluid changes, constant primping and detailing, in short - work, but unnecessary in many ways) while good old Frank is doing very nice work and showing how difficult it is to do things and has not nearly enough viewership for the quality and friendly ego-free excellent information and style! ;)
You are epic!
I wish I had this video when I resealed my 420g a month ago
15:13 crazy price
Excellent video, thank you very much. A question, is it possible that 6th gear does not engage because of the detents? I know they sell a repair kit
Great - thanks a lot here from germany! Helped me out! Whould be nice if you could show how the reverse gear internals are put together exactly - after they fell out completely into the gearbox by loosing the "bolt you should never take out". Also some torqening infos for all screws would be great. Please comment also on the uprade kit for the 5 bearings, springs and cylinders... By the way, did you ever faced the problem of only the 5th gear slipping out during drive?
Would the e36 zf tear down be similar? Any special tools?
Have a 6-speed 420G for my E34 M5, it pops out of fifth gear--would the best solution be to find a working 420g from a different car and swap the bellhousing, and buying the matching clutch plate?
Awesome vid! My E39 M5 is shifting great but is one of the many that leaks. I've thought of pulling it off in another winter or two to try to fix the issue; could you tell us what sealant you used between the sections of the casing when you reassembled?
Yep! It’s called permatex aircraft sealant. It’s a brown gooey “glue”, guaranteed not to leak if you apply to both sides
@@Garageaholic Excellent and thank you. Will the casings still pull apart if you need to separate again?
Of course they will. It's a sticky glue substance, not actual GLUE @@kwstine1
I always did want to work on a transmission🥴🥵
Great video! My M3’s transmission grinds pretty bad going from 1st to 2nd gear, and only sometimes in the other gears. After watching this I really need to study more and figure out exactly what is wrong with it before I start tearing it apart. Any recommendations?
I suggest you take it apart like I did and see if you have bad synchros, but I’m interested to know what your issue is.
Likely bad synchros. In which case you will need a donor trans since no new parts are available for the 420g.
@@MotorMouth930 I think my goal is to find a relatively low mile SMG trans and use my bellhousing + parts off my current one to do 6-speed conversion on it. Since the SMG gearboxes go a little cheaper.
Pre bday video release.
Here’s a question for you - how much radial play is acceptable in the output flange? Feels like mine has developed maybe 1-2 thou of radial play that I don’t remember being there when I put it in… follow up question to that - any idea where to get a replacement output shaft bearing?
Hey not sure where the internal components can be purchased but radial play should be nil. I see where you’re going that the bearing may be bad but failure of the bearings like that do not lend to radial play necessarily. Thats loss of material of the ball bearings. May be something else
Thanks for the quick reply - amazing! I’m trying to track down a bad vibration at 45mph. It’s speed dependent and semi-load dependent, too. It will get slightly smoother with added load in either direction - loading up with the pedal or coasting - and is worse when lightly loaded cruising. Transmission is in an e34 with an s52. Had to custom build a transmission mount and I think we missed the alignment slightly. It was really bad when I first put the car together, so we modified it to correct the misalignment I measured at the time. It smoothed out and was fine for a few thousand miles but then slowly got bad again. Initial thought was that the misalignment would’ve gotten corrected to not be noticeable but the mileage has worn something out - immediate suspect was the spigot bushing in the driveshaft - but this radial knocking in the flange was an unexpected find. I’ll still chase down the alignment to eliminate it, but I’m not optimistic…
@@charliemonster42 Is it RPM Dependent? or only occurs with the gear engaged? Do you have a dual mass flywheel? Thinking you have a flywheel issue.
@garageaholic no - it’s wheel speed dependent, happens in any gear and with the clutch disengaged. It’s a lightweight single mass flywheel. Driveshaft is brand new custom made to fit the longer trans, so it’s unlikely to be that, too. Guibo looks perfect, haven’t laid eyes on the csb yet but I expect the same.
Quick GoodQuestion?? If & when? Oh! No! 🤦♀️ Universe have mercy on me! Would you repair" as well ?? 😢😮 Obviously, me shipping over to you. & back. This often ponders my mind & exactly not many will & if Insanely $$$. Abusive & worse being a girl. Please let me know thanks T.
Whaaaaaaaaaat
Your ad is very annoying
So was your comment
@@Garageaholic didn’t think you would reply any differently. No worries!
Guys help. Im looking for a housing part that broke off in the transmission itself. (226.9.0321.90226) Holding everything together. Where should I look? (2005 E46 M3 Manual)