Is there a way to reinforce my 6AT?

cocoturkey · 04-05-2011, 12:39 AM

After I upgraded to RB turbos, i realized my 6AT isn't stronge enough for the new power output... Does anyone know a way to upgrade my 6AT? (upgrade torque converter?)

enrita · 04-05-2011, 01:14 AM

here you go: http://www.importperformancetrans.com/bmwauto.shtml

Brey335i · 04-05-2011, 01:14 AM

I don't know if anyone here has actually strengthened their auto. But it should be possible.. you might have to pioneer this

Brey335i · 04-05-2011, 01:16 AM

Wow... that's expensive

enrita · 04-05-2011, 01:42 AM

is cheaper to just buy a second hand trans when yours is shot. So far mine is holding pretty well.

Elie335i · 04-05-2011, 02:00 AM

Quote:

Originally Posted by enrita

is cheaper to just buy a second hand trans when yours is shot. So far mine is holding pretty well.

have you ever done tranny fluid change/flush?

enrita · 04-05-2011, 02:27 AM

Quote:

Originally Posted by Elie335i

have you ever done tranny fluid change/flush?

yes changed the fluid 1000 miles ago. could feel improvement.

Turkeybaster115 · 04-05-2011, 09:43 AM

Quote:

Originally Posted by cocoturkey

After I upgraded to RB turbos, i realized my 6AT isn't stronge enough for the new power output... Does anyone know a way to upgrade my 6AT? (upgrade torque converter?)

You have a 6hp19 tranny, so Search the salvage yards for a 6hp26 transmission, out of a 5 series, and do a swap.

enrita · 04-05-2011, 10:23 AM

Quote:

Originally Posted by Turkeybaster115

You have a 6hp19 tranny, so Search the salvage yards for a 6hp26 transmission, out of a 5 series, and do a swap.

i dont think its a swap and go with this car. You probably need to recode the tranny .

enrita · 04-05-2011, 10:30 AM

Quote:

Originally Posted by maxnix

Total mechanical exchange with filter change or only the semi-effective partial drain and refill? Have you installed an auxiliary cooler?

It has been mentioned on the Forums that the 6AT in the diesel and the 5er V8 is a heavier duty design.

MY shop followed BMW instructions. Emptied oil and changed filter/oilpan . Stock heat exchanger for the oil .

Brey335i · 04-05-2011, 10:36 AM

Or do a manual swap

Forcefed3 · 04-05-2011, 11:04 AM

Quote:

Originally Posted by enrita

Quote:

Originally Posted by maxnix

Total mechanical exchange with filter change or only the semi-effective partial drain and refill? Have you installed an auxiliary cooler?

It has been mentioned on the Forums that the 6AT in the diesel and the 5er V8 is a heavier duty design.

MY shop followed BMW instructions. Emptied oil and changed filter/oilpan . Stock heat exchanger for the oil .

How much did it cost?

Brey335i · 04-05-2011, 11:40 AM

Quote:

Originally Posted by gbreeE90

How much did it cost?

I believe Enrita is in Sweden, so the cost wouldn't really be that comparable. I've seen tranny flush and fluid changes range between $75-$200 depending on the shop used.

enrita · 04-05-2011, 11:48 AM

Quote:

Originally Posted by gbreeE90

How much did it cost?

300-400 USD but sweden is much more expensive than US.

Forcefed3 · 04-05-2011, 04:09 PM

Quote:

Originally Posted by enrita

300-400 USD but sweden is much more expensive than US.

So it would be cheaper than that in the US? I have heard many people saying it was around $800, but that sounded very off.

momstmg78 · 04-05-2011, 04:17 PM

I just did mine myself and it cost me$ 260. ( fluid, pan with filter, and sealing sleave). Local dealer quted me$ 940. For the service( replace pan and fluid).

acdHQK713K · 04-05-2011, 04:18 PM

Quote:

Originally Posted by gbreeE90

So it would be cheaper than that in the US? I have heard many people saying it was around $800, but that sounded very off.

DIY for <$200. It's easy.

Forcefed3 · 04-05-2011, 04:23 PM

Quote:

Originally Posted by Stangorang

DIY for <$200. It's easy.

Its easy to get most of the fluid out, but you still have to worry about the fluid in the torque converter.

acdHQK713K · 04-05-2011, 04:26 PM

Quote:

Originally Posted by maxnix

1.) Which leaves 60% of the expired and contaminated fluid in the transmission.

Look for a BG or Sun (SnapOn) ATF exchange machine to mechanically exchange 98% of your fluid with new.

2.) Which is not a cooler unless your ATF is over 200° F which is elevated for ATF operation and leaves little thermal margin. Look at a true auxiliary ATF cooler like a B&M 70264 or 70268.

60%? Where do you come up with that figure?

acdHQK713K · 04-05-2011, 04:27 PM

Quote:

Originally Posted by gbreeE90

Its easy to get most of the fluid out, but you still have to worry about the fluid in the torque converter.

If it is that vs not doing it at all the choice is easy.

Forcefed3 · 04-05-2011, 04:31 PM

Quote:

Originally Posted by Stangorang

If it is that vs not doing it at all the choice is easy.

Also, I have heard doing it past 30k can do more harm than good.

acdHQK713K · 04-05-2011, 04:34 PM

Quote:

Originally Posted by gbreeE90

Also, I have heard doing it past 30k can do more harm than good.

I've heard a lot of things on here as well. Doesn't mean it's true.

Many of us have been changing the fluid without issue.

04-05-2011, 12:39 AM	#1
cocoturkey Lieutenant 26 Rep 441 Posts Drives: 08' e92 335i Join Date: Jan 2008 Location: Taipei iTrader: (0)	Is there a way to reinforce my 6AT? After I upgraded to RB turbos, i realized my 6AT isn't stronge enough for the new power output... Does anyone know a way to upgrade my 6AT? (upgrade torque converter?)
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04-05-2011, 01:14 AM	#2
enrita Major General 161 Rep 7,377 Posts Drives: 335i - Big turbos Join Date: Sep 2008 Location: Italian in Sweden iTrader: (0)	here you go: http://www.importperformancetrans.com/bmwauto.shtml __________________ 07 335i AT - MOTIV 750 - MHD E85 BMS flash - BMS PI - JB4G5 - Okada Coils - NGK 5992 Plugs - Helix IC - Snow Stg. 3 - Stett CP - Custom midpipes with 100 HJS Cats - Bastuck Quad - PSS10 - QUAIFE LSD - BMS OCC - Forge DVs - AR OC - ALCON BBK - M3 Chassi - Dinan CP - Velocity M rear Toe arms - Advan RZ-DF - LUX H8 - Level 10 AT upgrade
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04-05-2011, 01:14 AM	#3
Brey335i Banned 118 Rep 4,771 Posts Drives: e46 ///M3 Join Date: Oct 2009 Location: Austin, TX iTrader: (11)	I don't know if anyone here has actually strengthened their auto. But it should be possible.. you might have to pioneer this
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04-05-2011, 01:16 AM	#4
Brey335i Banned 118 Rep 4,771 Posts Drives: e46 ///M3 Join Date: Oct 2009 Location: Austin, TX iTrader: (11)	Wow... that's expensive
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04-05-2011, 01:42 AM	#5
enrita Major General 161 Rep 7,377 Posts Drives: 335i - Big turbos Join Date: Sep 2008 Location: Italian in Sweden iTrader: (0)	is cheaper to just buy a second hand trans when yours is shot. So far mine is holding pretty well. __________________ 07 335i AT - MOTIV 750 - MHD E85 BMS flash - BMS PI - JB4G5 - Okada Coils - NGK 5992 Plugs - Helix IC - Snow Stg. 3 - Stett CP - Custom midpipes with 100 HJS Cats - Bastuck Quad - PSS10 - QUAIFE LSD - BMS OCC - Forge DVs - AR OC - ALCON BBK - M3 Chassi - Dinan CP - Velocity M rear Toe arms - Advan RZ-DF - LUX H8 - Level 10 AT upgrade
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04-05-2011, 10:36 AM	#11
Brey335i Banned 118 Rep 4,771 Posts Drives: e46 ///M3 Join Date: Oct 2009 Location: Austin, TX iTrader: (11)	Or do a manual swap
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04-05-2011, 04:17 PM	#16
momstmg78 Banned 12 Rep 376 Posts Drives: 335i sedan Join Date: Oct 2010 Location: Turkish's house iTrader: (0)	I just did mine myself and it cost me$ 260. ( fluid, pan with filter, and sealing sleave). Local dealer quted me$ 940. For the service( replace pan and fluid).
	Appreciate 0 Quote