KM177 - Revision history

Cartman02au at 05:05, 4 September 2020

2020-09-04T05:05:40Z

← Older revision		Revision as of 05:05, 4 September 2020
Line 16:		Line 16:
	*External transmission oil cooler		*External transmission oil cooler

	The KM177 can not directly be installed into a vehicle with the KM175 as they use different plugs. The KM177s are square, whilst the ~~KM177s~~ are ~~square~~. The transaxle control unit is also different for the KM177.		The KM177 can not directly be installed into a vehicle with the KM175 as they use different plugs. The KM177s are square, whilst the KM175s are round. The transaxle control unit is also different for the KM177.

	The KM177 was superseeded in the [[TP]] by the [[KM177-6]]		The KM177 was superseeded in the [[TP]] by the [[KM177-6]]

Administrator at 02:39, 3 September 2015

2015-09-03T02:39:41Z

← Older revision		Revision as of 02:39, 3 September 2015
Line 12:		Line 12:
	*Torque convertor [[stall speed]] dropped from 2200 - 1600 rpm to 2100 - 2500 rpm		*Torque convertor [[stall speed]] dropped from 2200 - 1600 rpm to 2100 - 2500 rpm
	*The end clutch was redesigned and could handle significantly more torque		*The end clutch was redesigned and could handle significantly more torque
	*Stronger transfer shaft ~~and~~ kickdown band		*Stronger transfer shaft, planetary gears, kickdown band and differential
	*Deletion of the oil pump adapter		*Deletion of the oil pump adapter
			*External transmission oil cooler

	The KM177 can not directly be installed into a vehicle with the KM175 as they use different plugs. The KM177s are square, whilst the KM177s are square. The transaxle control unit is also different for the KM177.		The KM177 can not directly be installed into a vehicle with the KM175 as they use different plugs. The KM177s are square, whilst the KM177s are square. The transaxle control unit is also different for the KM177.

Cartman02au at 01:25, 11 January 2010

2010-01-11T01:25:06Z

← Older revision		Revision as of 01:25, 11 January 2010
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	\|}		\|}

	[[Category: First Generation]]		[[Category: First Generation Magna]]
	[[Category: Automatic Transaxles]]		[[Category: Automatic Transaxles]]

Administrator: Protected "KM177" [edit=sysop:move=sysop]

2008-01-18T11:17:13Z

Protected "KM177" [edit=sysop:move=sysop]

New page

The '''KM177''' (also known as the F4A23) is a four-speed electronic automatic transaxle built by Mitsubishi. It was used in fuel-injected [[TN]] Magnas.

Early into the Magna's life, [[MMAL]] knew that the [[KM175]] could not handle any more torque than the carburettored [[1g_Astron_II|Astron II]] produced (200Nm) as it was designed to withstand the 2.0 Litre [[Sirius_family|4G63 SOHC]] used in the Galant (which produced 170Nm of torque). This extra 30Nm of torque is likely what led to the failure of so many KM175s.

When the TN EFI was introduced, MMAL decided to look for another automatic transmission as it feared an extra 5Nm (making the amount over what the KM175 was designed to handle 35Nm or 20%) would be too much for the KM175 to handle. As such, the KM177 was introduced.

The KM177 was similar to the KM175 and as such includes a damper clutch in the torque converter which causes the converter to lock at low vehicle speeds. The operation of the clutch is controlled by the Transaxle Control Unit.

As with the KM175, gear selection is electronic and is controlled by solenoids activated by the Transaxle Control Unit. The TCU uses information from sensors which provide information on vehicle speed, throttle position, engine coolant temperature, gear lever position, engine speed, transfer shaft speed, overdrive switch and kickdown drum speed.

The main differences between the KM175 and KM177 are:
*Torque convertor [[stall speed]] dropped from 2200 - 1600 rpm to 2100 - 2500 rpm
*The end clutch was redesigned and could handle significantly more torque
*Stronger transfer shaft and kickdown band
*Deletion of the oil pump adapter

The KM177 can not directly be installed into a vehicle with the KM175 as they use different plugs. The KM177s are square, whilst the KM177s are square. The transaxle control unit is also different for the KM177.

The KM177 was superseeded in the [[TP]] by the [[KM177-6]]
==Technical data==
{|cellpadding="3" align="left"
|'''Lubricant'''
|Mitsubishi ELC-4 ATF, Castrol TQM-SP, Valvoline Type M-II Special
|-
|'''Capacity'''
|5.8 Litres
|-
|'''Torque Convertor Stall Speed'''
|2100 - 2500 rpm
|-
|-colspan="2"
|'''GEAR RATIOS'''
|-
|'''Final Drive'''
|3.705
|-style="align: left"
|'''1st'''
|2.551
|-
|'''2nd'''
|1.488
|-
|'''3rd'''
|1.000
|-
|'''4th'''
|0.685
|-
|'''Reverse'''
|2.176
|}

[[Category: First Generation]]
[[Category: Automatic Transaxles]]