Questions On Transmission Swaps. (not auto to manual)

Jerooo · 02-08-2015, 12:25 PM

I've been wondering and searching for this but could not find an answer. Is there a difference between the 335i manual trans compared to the 325i/330i manual trans? I'm aware that the 335i can hold much more power. Would a 335i trans bolt right into a 325i/330i car?

Bavarian Tech · 02-08-2015, 02:08 PM

No, bell housing bolts are different

hassmaschine · 02-08-2015, 03:05 PM

Are you sure? All BMW small inline six bolt patterns are the same, since at least the 1970's.

What trans does the 335 have? Wouldn't it just have an uprated clutch? I don't think you need to worry about the transmission itself.

Bavarian Tech · 02-09-2015, 05:50 PM

Quote:

Originally Posted by hassmaschine

Are you sure? All BMW small inline six bolt patterns are the same, since at least the 1970's.

What trans does the 335 have? Wouldn't it just have an uprated clutch? I don't think you need to worry about the transmission itself.

23007571423 "GS6-53DZ - THGX" ~335I

23007565853 "GS6-37BZ - TJEP" ~300I

rhombus · 02-13-2015, 11:11 AM

I thought gingerbreadman swapped his 330i N52 for N54 using his stock auto transmission.

http://www.e90post.com/forums/showth...4#post16898024

hassmaschine · 02-13-2015, 12:39 PM

Yeah, I'm not sure the difference is significant.

In any case, the 330i 6 speed is rated for 370nm and typically BMW transmissions will handle way more torque than their rating suggests.

Also, drivetrain components are not rated for horsepower, which is a measure of work completed over time (basically, torque x rpm / 5252). They are rated for torque capacity. A clutch upgraded to more torque capacity would be more than adequate for most N52 builds. You're not going to break a manual transmission...

rhombus · 02-13-2015, 12:51 PM

Quote:

Originally Posted by hassmaschine

Yeah, I'm not sure the difference is significant.

In any case, the 330i 6 speed is rated for 370nm and typically BMW transmissions will handle way more torque than their rating suggests.

Also, drivetrain components are not rated for horsepower, which is a measure of work completed over time (basically, torque x rpm / 5252). They are rated for torque capacity. A clutch upgraded to more torque capacity would be more than adequate for most N52 builds. You're not going to break a manual transmission...

Agreed.

No clutch issues so far on the E91 with the SC.

02-08-2015, 12:25 PM	#1
Jerooo New Member 5 Rep 23 Posts Drives: 325i 2006 e90 Join Date: Nov 2014 Location: Chicago iTrader: (1)	Questions On Transmission Swaps. (not auto to manual) I've been wondering and searching for this but could not find an answer. Is there a difference between the 335i manual trans compared to the 325i/330i manual trans? I'm aware that the 335i can hold much more power. Would a 335i trans bolt right into a 325i/330i car?
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02-08-2015, 02:08 PM	#2
Bavarian Tech Major 267 Rep 1,203 Posts Drives: 335i Join Date: Jan 2007 Location: Pittsburgh/Harrisburg iTrader: (15) Garage List 2006 330i [10.00]	No, bell housing bolts are different
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02-08-2015, 03:05 PM	#3
hassmaschine Major General 3975 Rep 7,215 Posts Drives: "NBO" 330i Join Date: Jun 2014 Location: earth iTrader: (0)	Are you sure? All BMW small inline six bolt patterns are the same, since at least the 1970's. What trans does the 335 have? Wouldn't it just have an uprated clutch? I don't think you need to worry about the transmission itself.
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02-13-2015, 11:11 AM	#5
rhombus Capt Rhombus 76 Rep 166 Posts Drives: E46 M3/6, E91 325xi/6 Join Date: Feb 2014 Location: Blacksburg, VA iTrader: (0) Garage List 2002 BMW M3 [0.00] 2006 BMW E91 325xi ... [0.00] 2011 BMW E70 X5 35i [0.00] 2001 BMW X5 4.4i [0.00]	I thought gingerbreadman swapped his 330i N52 for N54 using his stock auto transmission. http://www.e90post.com/forums/showth...4#post16898024 __________________ E46 M3 6MT : ESS VT2-575 : Euro Headers : PSS10 : ARC8 F15 35i : MHD EWG, FMIC, 4" ER DP; E70 35i : MHD, ER Downpipe; E53 4.4i : 31.5" BFG K02s on BBS Style 19s
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02-13-2015, 12:39 PM	#6
hassmaschine Major General 3975 Rep 7,215 Posts Drives: "NBO" 330i Join Date: Jun 2014 Location: earth iTrader: (0)	Yeah, I'm not sure the difference is significant. In any case, the 330i 6 speed is rated for 370nm and typically BMW transmissions will handle way more torque than their rating suggests. Also, drivetrain components are not rated for horsepower, which is a measure of work completed over time (basically, torque x rpm / 5252). They are rated for torque capacity. A clutch upgraded to more torque capacity would be more than adequate for most N52 builds. You're not going to break a manual transmission...
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