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FAQ E28 Transmissions, an overview

Posted: Mar 29, 2009 7:27 PM
by Mike W.
This content has moved to the WIki: Drivetrain - The E28 Wiki
 

Re: FAQ E28 Transmissions, an overview

Posted: Mar 30, 2009 11:12 AM
by go4carter
Thanks for this great FAQ. Very handy.
Mike W. wrote: 4HP22EH 4 speed automatic, electronically controlled. Optional on M30 cars starting in 86, it has a choice of 3 different shift patterns, economy, normal and sport.
Not quite true. The three modes are:
Economy (normal shifts)
Sport (higher shift points are selected depending on the level of throttle input)
1-2-3 (manumatic mode - You are able to bump-shift through gears without depressing the lock button - OD/4th is not accessible)

Posted: Mar 30, 2009 11:44 AM
by Justin_FL
I took the liberty to add some BBCode formatting to increase readability and made some minor styling consistent throughout the writeup. Hope you don't mind.

Posted: Mar 30, 2009 2:14 PM
by nightmare_v2
STICKY!

Posted: Mar 30, 2009 2:47 PM
by ElGuappo
Great post Mike, thanks for taking the time.

Posted: Mar 30, 2009 3:25 PM
by Murfinator
It was used on E23 745i's, so BMW had some confidence in it’s capability.
I believe they were offered with the 4HP-22EH.
From BMW M Registry: "Most examples of the South African-spec 745i were equipped with a computer-controlled ZF four-speed automatic transmission with Sport, Economy and Manual shift point modes mated to a 3.73:1 rear axle ratio and limited slip differential. Unlike the German-built 745i, the South African version was also offered with a Getrag five-speed manual gearbox with a "dogleg" shift pattern and the following ratios: 3.72 (1), 2.40 (2), 1.77 (3), 1.24 (4), 1.00 (5). These were equipped with a 3.45:1 rear end with limited slip."
http://www.bmwmregistry.com/model_faq.php?id=4#3

The dogleg version would be sweet. The ones I've driven all had the electronically controlled 4spd auto.

Posted: Mar 30, 2009 11:36 PM
by BRRV
With regards your note concerning the G260/6 and the flywheel sensor 'holes' - does your note say that the E34-sourced transmissions don't have them, or, am I misreading this? I would assume that all E28's with this transmission would indeed have the sensor fittings in the case - otherwise, it's a transmission from an E34, right?

Excellent write-up. Thanks!

Posted: Mar 31, 2009 2:04 AM
by derrith
Murfinator wrote:
It was used on E23 745i's, so BMW had some confidence in it’s capability.
I believe they were offered with the 4HP-22EH.
From BMW M Registry: "Most examples of the South African-spec 745i were equipped with a computer-controlled ZF four-speed automatic transmission with Sport, Economy and Manual shift point modes mated to a 3.73:1 rear axle ratio and limited slip differential. Unlike the German-built 745i, the South African version was also offered with a Getrag five-speed manual gearbox with a "dogleg" shift pattern and the following ratios: 3.72 (1), 2.40 (2), 1.77 (3), 1.24 (4), 1.00 (5). These were equipped with a 3.45:1 rear end with limited slip."
http://www.bmwmregistry.com/model_faq.php?id=4#3

The dogleg version would be sweet. The ones I've driven all had the electronically controlled 4spd auto.
Yes, but the SA 745i was not m102 or m106 powered. It was equipped with the engine from the m5 and m6.

Posted: Mar 31, 2009 2:09 AM
by wkohler
Still, the regular 745s had the EH tranny.

Posted: May 13, 2009 1:27 AM
by wkohler
I say we sticky this.

Posted: May 13, 2009 12:25 PM
by pldlnr
I say we sticky this.
+1

Posted: May 13, 2009 7:16 PM
by Mike W.
Justin_FL wrote:I took the liberty to add some BBCode formatting to increase readability and made some minor styling consistent throughout the writeup. Hope you don't mind.
Mind? No, not at all, it looks much better. Thank you!

Edit; I made some changes on the 745i references.

Posted: May 13, 2009 7:35 PM
by Brad D.
I think this is worthy of putting in the Tech FAQ instead of making it a sticky.

Re: FAQ E28 Transmissions, an overview

Posted: May 13, 2009 8:25 PM
by Jeremy
Mike W. wrote:Often incorrectly called a 262 close ratio or dogleg
Calling the close ratio 265 a dogleg isn't incorrect at all as it has a dogleg first gear.

Posted: May 13, 2009 8:46 PM
by GermanlookT3
AWESOME POST! 8)

Posted: May 13, 2009 9:27 PM
by 1st 5er
:up: :up:

I'd expect nothing less from Mike W.

Posted: Oct 02, 2009 10:41 PM
by wkohler
Why isn't this a sticky?

Posted: Oct 02, 2009 11:26 PM
by mooseheadm5
It should be noted that there are 2 bell housing depths on the 260/5 used on the M20 engines. If you get one that does not match your clutch/flywheel thickness, you could have problems.

Posted: Oct 03, 2009 12:53 AM
by Jean
Great post, thank you

Posted: Oct 03, 2009 12:23 PM
by Brad D.
Stickied.
I thought I would add the visual ID as well as the gear ratio charts courtesy of Metric Mechanic's website.

Getrag 265/6
Image

Getrag 260/5&6
Image

Getrag 265/5
Image

Posted: Oct 06, 2009 11:39 AM
by MadMaverick
Is there any difference between the 4HP22-EH between the e28 and e34? Specifically a later e28 4HP22-EH into a '90 535. The old trans is there for sensors/harness, etc.

Posted: Oct 08, 2009 6:03 PM
by alijonny
another question, I have a known good spare 260/6 that I want to swap into my 745i. I have all the parts to do the swap, the 745 already has a 260/5 with a nasty whine in 1st and a bad synchro in third. I realize there is a different shifter support, is this possible to swap over from a different shifter support without too much work involved? I suppose I would have to do driveshaft customizing too, huh?

Posted: Dec 03, 2009 2:36 PM
by Canuck YYC
There's something fishy about those Metric Mechanic gear ratios. You could get a 3.83 1st gear with a 12 / 46 tooth gear pair which is pretty normal for a transmission. To get a 3.822 ratio, you start heading into the realm of the sureal - even at a 28 / 107 gear pairing, you're not at 3.822 yet. Similar things for .810 and .813, 1.400 and 1.398 - differences that small just aren't possible within the confines of economic production and a given package space.

Edit - Beautiful post by the way.

Posted: Jan 06, 2010 2:36 PM
by draztik
I have a Getrag 260/5 from my 533i production 4/84. According to the Bentley, beginning in March 1984 the Getrag 260 0105 090 was replaced with a 260 0105 091 transmission on 533i models. The 091 used a longer release bearing than the 090. The 091 also used the same clutch as the 265 and 260/6. I know this as a fact because I just replaced mine last year when I did my engine swap. My question is since the 091 uses the same clutch as the 265 and 260/6 would this mean that the M5 clutch will work?[/list]

Posted: Jan 21, 2010 6:39 PM
by kohlmetoba
Hi there knowledgable people of mye28. I have a warped 3rd gear in my 1984 533i and was planning to replace it. I learnt from various sources that I needed a Getrag 260/5, so i decided to get one off craigslist, I got a decent one from some guy on CL but upon telling my mechanic to fit it in? he says its the wrong tranny that the bell housing is wrong and he keeps saying the tranny is too long Idk exactly what is wrong cos i thought this tranny was fairly universal, if anyone needs it in the LA area u can come check it out and pick it up for 200.

Posted: Jan 21, 2010 6:42 PM
by wkohler
kohlmetoba wrote:Hi there knowledgable people of mye28. I have a warped 3rd gear in my 1984 533i and was planning to replace it. I learnt from various sources that I needed a Getrag 260/5, so i decided to get one off craigslist, I got a decent one from some guy on CL but upon telling my mechanic to fit it in? he says its the wrong tranny that the bell housing is wrong and he keeps saying the tranny is too long Idk exactly what is wrong cos i thought this tranny was fairly universal, if anyone needs it in the LA area u can come check it out and pick it up for 200.
There are a couple different 260/5s. There's the one for the M30 (what's in your 533) and then it was also used in the '83-on 528e. They're not interchangeable. You need one from an M30 car, so contact who I told you to contact. :D

Posted: Jul 02, 2010 6:28 AM
by e28stian
The aluminium shifter console from the getrag 260/6 is compatible with the alu console from the m20 mounted 240 boxes belonging in e30 cars. Just thought i would add this info.

Re: FAQ E28 Transmissions, an overview

Posted: Jul 13, 2010 2:31 PM
by trav3000
Does the auto 4hp 22eh tranny also have the burn up problem when revving in park?

Re: FAQ E28 Transmissions, an overview

Posted: Jul 13, 2010 3:03 PM
by Jeremy
trav3000 wrote:Does the auto 4hp 22eh tranny also have the burn up problem when revving in park?
Park or neutral. Unless the transmission has been repaired and updated, all 4hp22 transmissions share that problem. Even if you have one with the "fix", I still wouldn't rev it in park or neutral.

Re: FAQ E28 Transmissions, an overview

Posted: Jul 14, 2010 3:53 PM
by trav3000
Jeremy wrote:
trav3000 wrote:Does the auto 4hp 22eh tranny also have the burn up problem when revving in park?
Park or neutral. Unless the transmission has been repaired and updated, all 4hp22 transmissions share that problem. Even if you have one with the "fix", I still wouldn't rev it in park or neutral.

ahhhhh. but the exhaust sounds so good :cry: