[disabled_cata]

Hello guys ,

I have a n55 335i E92 AT and I want to swap the transmission it with a manual one.

I know a N54 manual gearbox will fit on N55 if I mount a N54 flywheel aswell.

What I don't know is :

Can I mount a N55 gearbox from F generation?

The correct part-number for E92 is 23007599342.
Here are 2 problems :
1. this gearbox is very rare on ebay or other car breakers.(I don't want to spend 4000$ on a new one)
2. They tend to break a lot. There are many users who complained about the second gear problem. Also there are 2 units damaged for sale on ebay. So that's a fact.



Realoem is very confusing , says that this part number is superseeded , but when I click on the new partnumber my E92 dissapears from the list

https://www.realoem.com/bmw/enUS/par...&q=23007599342


Because I found one from a F22 , partnumber 23007617492 , and I am not sure if it will work.

What are the differences between these GS6-45BZ ?

I am really stuck.

[dleccord]

have you looked into using the TREMEC T56 tranny or using the guts?

[rich_mane]

I went with the N54 because of how cheap and abundant they are. Plus from what I've read, they seem to be a bit stronger than the N55 manual trans as well.

Can't tell you the differences between F chassis and E chassis N55 manual trans... I'm really not sure. But I've had an N54 manual trans on mine for over a year and 12k miles without any issue.

[dleccord]

Originally Posted by rich_mane

I went with the N54 because of how cheap and abundant they are. Plus from what I've read, they seem to be a bit stronger than the N55 manual trans as well.

Can't tell you the differences between F chassis and E chassis N55 manual trans... I'm really not sure. But I've had an N54 manual trans on mine for over a year and 12k miles without any issue.

how much did they whole install cost including the coding? did u install it yourself?

[disabled_cata]

Hello , yes , N54 seems to be easier to find(and cheaper too) , but if someone will confirm that a F series gearbox will fit , I will go for it. It should be smoother in changing gears , at least that is what I've read on forums.

[rich_mane]

Originally Posted by dleccord

how much did they whole install cost including the coding? did u install it yourself?

Yes I installed everything myself, as well as coding with the exception of having bimmergeeks remotely help me clear adaptations using INPA (I wasn't familiar enough with it at the time.) Whole project cost around ~$1500 with most parts being used OEM. Sourced everything from ebay and the forums. Only new parts I bought were everything on the shifter assembly and the tranny/flywheel bolts.

Originally Posted by disabled_cata

Hello , yes , N54 seems to be easier to find(and cheaper too) , but if someone will confirm that a F series gearbox will fit , I will go for it. It should be smoother in changing gears , at least that is what I've read on forums.

Sorry but I really don't know that for sure. Hopefully someone else can chime in here.

[dleccord]

Originally Posted by rich_mane

Yes I installed everything myself, as well as coding with the exception of having bimmergeeks remotely help me clear adaptations using INPA (I wasn't familiar enough with it at the time.) Whole project cost around ~$1500 with most parts being used OEM. Sourced everything from ebay and the forums. Only new parts I bought were everything on the shifter assembly and the tranny/flywheel bolts.



Sorry but I really don't know that for sure. Hopefully someone else can chime in here.

thats not bad for $1500, do you have to report it to dmv that its now a manual transmission? also did you do this in your driveway?

[disabled_cata]

Well , if no news coming up until tommorow , I am ordering the N54 gearbox.

rich_mane How do you like the N54 gearbox , did you needed time to accomodate with it?

[rich_mane]

Originally Posted by dleccord

thats not bad for $1500, do you have to report it to dmv that its now a manual transmission? also did you do this in your driveway?

I haven't reported it to the DMV no. Not sure if it's something that's required or not. I worked in a shop, did it on a lift. There really isn't a whole lot to the swap. Everything bolts up pretty easily and the holes are already in the body for the clutch lines and shifter and whatnot. Could be done in a driveway if youre comfortable enough for sure.

Originally Posted by disabled_cata

Well , if no news coming up until tommorow , I am ordering the N54 gearbox.

rich_mane How do you like the N54 gearbox , did you needed time to accomodate with it?

I've had zero issues with mine, bought a transmission with about 90k (same as my motor) for ~$600 shipped. Put fresh redline MTL fluid in it. Shifts nicely, I used a short shifter that makes it a little notchier but I haven't ever had a gear grind or any problems shifting at all. Really happy with the swap, I'd do it again in a heartbeat.

[dleccord]

do you know any california shops that will do it for $3k

[disabled_cata]

Thanks , I have ordered the N54 gearbox. 500E shipped. I am doing the swap myself.

Also @rich_mane : what gear shifter assembly did you used ? a N54 one or N55?

[deemarr 335i]

Did you use a n54 clutch and flywheel? What about the driveshaft and center bearing ?

[rich_mane]

Originally Posted by disabled_cata

Thanks , I have ordered the N54 gearbox. 500E shipped. I am doing the swap myself.

Also @rich_mane : what gear shifter assembly did you used ? a N54 one or N55?

I believe the shifter itself is universal between the two. I definitely had to use an N54 shift bracket, as well as the MT transmission mount. Pretty sure I used an N54 selector rod as well. Tranny bolts are slightly longer for the MT and flywheel bolts are different from AT so you'll need those as well.

Originally Posted by deemarr 335i

Did you use a n54 clutch and flywheel? What about the driveshaft and center bearing ?

I used the N54 6bolt flywheel and a clutch I found used on the forum. I reused my AT driveshaft and center bearing.

[rborane]

Wheres the best place to source the parts if I also want to get this done on my e92 N55?

[SteerinViren]

I saw a couple of you started attempting the swap a couple months ago, did you guys finish? If so, any advice for me? I plan on swapping my n55 e92 soon, trying to get as much insight as I can.

[Maniac0908]

Does anyone know if a n55 shifter assembly with fit on a N54 trans? They look the same but have different part numbers and n55 says reinforced