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BMW 3-Series and 4-Series Forum (F30 / F32) | F30POST > Technical Forums > N55 Turbo Engine / Drivetrain / Exhaust Modifications > ZF8HP45 swappable with ZF8HP70 ?
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      05-08-2018, 10:18 AM   #23
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Quote:
Originally Posted by Stanio View Post
I think you are right.

So the only other way is for a company to come up with an upgraded clutch for the current tranny....damn !
Either way the 8HP70 is not going to be a drop-in
There will likely be other mated parts needed even if brad indicated the tunnels will allow it..

as far as an upgraded 8HP45.. that is not out of the question
upgraded clutch packs
upgraded trans shaft is likely going to be also needed to go to 700Nm
I think a transmission-mod shop which knows what their doing would be required
when overloading the 8HP45 I would also think additional cooling would be an issue which needs to be addressed
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      08-13-2018, 08:49 PM   #24
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Would love to see this happen.
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      08-13-2018, 08:52 PM   #25
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Originally Posted by M248 View Post
Subscribed!

Would love to see this happen.
Get an M3/4 .. no need to mess around with tricky trannie upgrades for a 45 unit
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      08-14-2018, 07:18 AM   #26
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Quote:
Originally Posted by insanecoder View Post
Quote:
Originally Posted by M248 View Post
Subscribed!

Would love to see this happen.
Get an M3/4 .. no need to mess around with tricky trannie upgrades for a 45 unit
Ok but if you bought your n55 335i for 20k and a m3/m4 is out of your price range what do you do? It's easy to say upgrade but who actually has the money to do so? I want to upgrade mine simply because I drag it and I want to make sure I don't overload the transmission with all the torque I'm going to be putting down
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      08-14-2018, 08:06 AM   #27
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Quote:
Originally Posted by Bimmertodd88 View Post
Ok but if you bought your n55 335i for 20k and a m3/m4 is out of your price range what do you do? It's easy to say upgrade but who actually has the money to do so? I want to upgrade mine simply because I drag it and I want to make sure I don't overload the transmission with all the torque I'm going to be putting down
instead of trying to jam a 70 unit into a 3 series of which I've never ever heard of
better to go the route which has been traveled even if by few
upgraded 45 unit with clutchpacks & shafts as indicated above
otherwise you could just risk it and do nothing like many do
and it could work out or not

I mean when you increase the stresses on the auto
at some point one or two strengthened chain links isnt gong to do much
because the entire chain could break at any weakened link
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      08-14-2018, 12:22 PM   #28
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Quote:
Originally Posted by insanecoder View Post
Quote:
Originally Posted by Bimmertodd88 View Post
Ok but if you bought your n55 335i for 20k and a m3/m4 is out of your price range what do you do? It's easy to say upgrade but who actually has the money to do so? I want to upgrade mine simply because I drag it and I want to make sure I don't overload the transmission with all the torque I'm going to be putting down
instead of trying to jam a 70 unit into a 3 series of which I've never ever heard of
better to go the route which has been traveled even if by few
upgraded 45 unit with clutchpacks & shafts as indicated above
otherwise you could just risk it and do nothing like many do
and it could work out or not

I mean when you increase the stresses on the auto
at some point one or two strengthened chain links isnt gong to do much
because the entire chain could break at any weakened link
Yeah trust me I would rather do that too the problem is where do I get it done? I have been on the lookout for a solution for a while.
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      08-14-2018, 04:18 PM   #29
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Quote:
Originally Posted by Bimmertodd88 View Post
Yeah trust me I would rather do that too the problem is where do I get it done? I have been on the lookout for a solution for a while.
Yeah same here i just dont think there is a solution available for the public at the moment
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      08-14-2018, 04:25 PM   #30
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Quote:
Originally Posted by Dfahmy View Post
Quote:
Originally Posted by Bimmertodd88 View Post
Yeah trust me I would rather do that too the problem is where do I get it done? I have been on the lookout for a solution for a while.
Yeah same here i just dont think there is a solution available for the public at the moment
I mean I see a torque converter upgrade but I don't know if it's for ours or the 70 but it's 1300 dollars so..... lol
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      08-14-2018, 06:27 PM   #31
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Quote:
Originally Posted by Bimmertodd88 View Post
I mean I see a torque converter upgrade but I don't know if it's for ours or the 70 but it's 1300 dollars so..... lol
Youd have to get it custom upgraded at a racing or transmission shop usually focused on racing where a transmission specialist knows his ZF units
no I've not seen off the shelf solutions
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      08-14-2018, 06:28 PM   #32
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Quote:
Originally Posted by insanecoder View Post
Quote:
Originally Posted by Bimmertodd88 View Post
I mean I see a torque converter upgrade but I don't know if it's for ours or the 70 but it's 1300 dollars so..... lol
Youd have to get it custom upgraded at a racing or transmission shop usually focused on racing where a transmission specialist knows his ZF units
no I've not seen off the shelf solutions
Yeah I figured. Sounds like a plan when I go to upgrade the turbo
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      01-27-2021, 09:04 AM   #33
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Quote:
Originally Posted by insanecoder View Post
instead of trying to jam a 70 unit into a 3 series of which I've never ever heard of
better to go the route which has been traveled even if by few
upgraded 45 unit with clutchpacks & shafts as indicated above
otherwise you could just risk it and do nothing like many do
and it could work out or not

I mean when you increase the stresses on the auto
at some point one or two strengthened chain links isnt gong to do much
because the entire chain could break at any weakened link
you're a clown thats why you've never heard of a zf8hp70 in an f30. bmw alpina used a zf8hp70 mated to an n55 engine in their b3. plus it's used with the diesel version of the f30 aswell. do some research you stranded clown before you throw your misleading opinions out there.
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      01-27-2021, 09:18 AM   #34
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Old thread but from I've discovered there are different variants of the zf units in terms of where the starter is mounted, on the n57 diesel zf8hp70 the starter is below the flywheel where as on the v8 zf8hp70 the starter is on the side of the flywheel. none of these will fit the n55 due to different different bolt pattern and starter location unless someone wants to make a custom bracket or do extensive fabwork to make this work. if someone does decide to go this route I'd go for the zf8hp70 on the diesel variant because it would probably bolt up easier. Tho these is a zf8hp70 version thats uses on the n55 by alpina that they use on their b3 f30 which is a direct bolt on because the starter location and bolt pattern is the same the only issue is i wasn't able to find a part number for that anywhere and it not available on realoem.com . don't think it would be possible to get that version in North America because we don't get alpina b3 here. what irks me the most is its been 10 years since the zf8hp45 is out and no one has made upgrades like torque converter, clutches ect for it tho Sonax makes a zip kit but i doubt that help with increased power rating, it probably just improves the shifts.
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      01-27-2021, 11:55 AM   #35
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Quote:
Originally Posted by njmian View Post
Old thread but from I've discovered there are different variants of the zf units in terms of where the starter is mounted, on the n57 diesel zf8hp70 the starter is below the flywheel where as on the v8 zf8hp70 the starter is on the side of the flywheel. none of these will fit the n55 due to different different bolt pattern and starter location unless someone wants to make a custom bracket or do extensive fabwork to make this work. if someone does decide to go this route I'd go for the zf8hp70 on the diesel variant because it would probably bolt up easier. Tho these is a zf8hp70 version thats uses on the n55 by alpina that they use on their b3 f30 which is a direct bolt on because the starter location and bolt pattern is the same the only issue is i wasn't able to find a part number for that anywhere and it not available on realoem.com . don't think it would be possible to get that version in North America because we don't get alpina b3 here. what irks me the most is its been 10 years since the zf8hp45 is out and no one has made upgrades like torque converter, clutches ect for it tho Sonax makes a zip kit but i doubt that help with increased power rating, it probably just improves the shifts.
I either read, or saw in a video, that there is a company that can "build" the ZH8HP45 that we have with our N55s. So i am pretty sure it exists. It's just very uncommon because few people are pushing into the 600+wtq range that will start braking parts on this trans, and when they do, they usually just swap with a used one.
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      01-28-2021, 09:46 AM   #36
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Quote:
Originally Posted by thejeremyman9 View Post
I either read, or saw in a video, that there is a company that can "build" the ZH8HP45 that we have with our N55s. So i am pretty sure it exists. It's just very uncommon because few people are pushing into the 600+wtq range that will start braking parts on this trans, and when they do, they usually just swap with a used one.
Correct pure drivetrain builds our transmissions, 850whp+ builds are using these solutions. https://www.puredrivetrainsolutions....p-transmission
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      02-01-2021, 03:58 PM   #37
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Came across this. Talks about how they used 8HP45 in the M235i during racing series in Germany. Not exactly what you were looking for but, pretty interesting none-the-less...of course money is no worries to them for a replacement.

https://www.sachsperformance.com/en/...-8hp45-from-zf
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      02-02-2021, 07:39 PM   #38
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https://f30.bimmerpost.com/forums/sh....php?t=1736885

Some additional discussion has already taken place.
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      12-08-2021, 02:13 PM   #39
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Quote:
Originally Posted by Polo08816 View Post
It's most definitely a Frankenstein build for you - as the individual end user - because you're going to end up needing to do all the leg work. Alpina does not sell the B3 S model in the United States. You're making it sound easy, but it's not. If it were easy, in the United States would have already done it.

Even then, I'm almost positive that both the time and material cost will exceed the purchase price of an Alpina B3 S which is approximately 61,000 Euros - or low 70,000 USD.

It'll end up costing the same if not more than buying a brand new M3 ZCP, except if something goes wrong, you're on your own. You won't be able to drop it off at a dealer and let them figure out what's wrong with an M3 ZCP under factory warranty.

Your statements did not age well.
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      12-08-2021, 03:02 PM   #40
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For those who don't venture into the other parts of the forum, a similar swap to what the OP was asking about was performed over HERE. Yes, Pure Drivetrain Solutions offers an upgrade. The Pure Stage 0 ($3250) ZF 8HP45/50 is basically equal to a stock ZF 8HP70 (swap cost about $2500-3000), so if one is not looking at making more than 700 "flywheel" torque they can save themselves the energy in locating all parts for a 8HP70 swap for a relatively low price.

Edit: 8HP70 swap link --> https://f30.bimmerpost.com/forums/sh....php?t=1785998

Fixed link

Last edited by 5w20; 12-08-2021 at 07:12 PM..
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      12-08-2021, 07:00 PM   #41
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Quote:
Originally Posted by 5w20 View Post
For those who don't venture into the other parts of the forum, a similar swap to what the OP was asking about was performed over https://f30.bimmerpost.com/forums/showthread.php?t=1785998"]HERE[/URL]. Yes, Pure Drivetrain Solutions offers an upgrade. The Pure Stage 0 ($3250) ZF 8HP45/50 is basically equal to a stock ZF 8HP70 (swap cost about $2500-3000), so if one is not looking at making more than 700 "flywheel" torque they can save themselves the energy in locating all parts for a 8HP70 swap for a relatively low price.
Ya that stage 0 is a nice solution for stock block big turbo gang
Likely able to handle more but a reliability rating or 750/750, like how we can push the stock trans for quite awhile on pretty good power levels
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      12-08-2021, 07:12 PM   #42
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Originally Posted by Pussiwillow View Post
Ya that stage 0 is a nice solution for stock block big turbo gang
Likely able to handle more but a reliability rating or 750/750, like how we can push the stock trans for quite awhile on pretty good power levels
It's not quite clear what the rating actually means. Does it mean the Pure transmission can handle its rated torque for as long as a stock 8HP45 can handle the output of a stock N55? Or does it just mean that it won't implode the second you achieve a 750 torque rating?

From the website, it doesn't seem like the upgraded transmissions change the cooling lines and the heat exchanger properties that are forward in the engine bay. And we all know heat kills transmissions. If you're drag racing for no more than 30 seconds at a time, then it may not be a problem. It certainly will be a problem if you're pushing the car very hard for 30-60 minutes continuously.
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      12-08-2021, 07:29 PM   #43
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See that's the thing as well, Who really knows what the rating means in real world.
I'm gonna pm you about something unrelated to this.
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      12-09-2021, 11:21 AM   #44
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I emailed pure drivetrain. They are located in Medford NY, on Long Island. I may swing by there this weekend
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