transmission
#1
#2
RF Veteran
iTrader: (1)
2001 and up 2.3l and 3.0l will have 5R44E 5-speed
1997 and up 4.0l had 5R55E 5-speed
They look identical, I believe the 5R55E had stronger output shaft
The 5th gear was added using computer(PCM) software, 2nd gear was 1st gear with overdrive engaged, lol, "very clever these Americans"
4R44E(2.3l/3.0l) and 4R55E(4.0l only) were the 4 speeds that were changed to 5 speeds
They had these 4 ratios: 2.47 / 1.47 / 1.00 / 0.75
The 5R's have these 5 ratios: 2.47 / 1.87 / 1.47 / 1.00 / 0.75
1st(2.47) x OD(.75) = 1.86.................the "new" 2nd gear
Since the Bell housings can not be changed without complete disassembly of the transmission, and a 4.0l trans won't bolt to a 3.0l engine, you can't easily swap a 5R44E for a 5R55E, and really no reason to.
1997 and up 4.0l had 5R55E 5-speed
They look identical, I believe the 5R55E had stronger output shaft
The 5th gear was added using computer(PCM) software, 2nd gear was 1st gear with overdrive engaged, lol, "very clever these Americans"
4R44E(2.3l/3.0l) and 4R55E(4.0l only) were the 4 speeds that were changed to 5 speeds
They had these 4 ratios: 2.47 / 1.47 / 1.00 / 0.75
The 5R's have these 5 ratios: 2.47 / 1.87 / 1.47 / 1.00 / 0.75
1st(2.47) x OD(.75) = 1.86.................the "new" 2nd gear
Since the Bell housings can not be changed without complete disassembly of the transmission, and a 4.0l trans won't bolt to a 3.0l engine, you can't easily swap a 5R44E for a 5R55E, and really no reason to.
Last edited by RonD; 03-21-2016 at 11:32 AM.
#3
A/T
2001 and up 2.3l and 3.0l will have 5R44E 5-speed
1997 and up 4.0l had 5R55E 5-speed
They look identical, I believe the 5R55E had stronger output shaft
The 5th gear was added using computer(PCM) software, 2nd gear was 1st gear with overdrive engaged, lol, "very clever these Americans"
4R44E(2.3l/3.0l) and 4R55E(4.0l only) were the 4 speeds that were changed to 5 speeds
They had these 4 ratios: 2.47 / 1.47 / 1.00 / 0.75
The 5R's have these 5 ratios: 2.47 / 1.87 / 1.47 / 1.00 / 0.75
1st(2.47) x OD(.75) = 1.86.................the "new" 2nd gear
Since the Bell housings can not be changed without complete disassembly of the transmission, and a 4.0l trans won't bolt to a 3.0l engine, you can't easily swap a 5R44E for a 5R55E, and really no reason to.
1997 and up 4.0l had 5R55E 5-speed
They look identical, I believe the 5R55E had stronger output shaft
The 5th gear was added using computer(PCM) software, 2nd gear was 1st gear with overdrive engaged, lol, "very clever these Americans"
4R44E(2.3l/3.0l) and 4R55E(4.0l only) were the 4 speeds that were changed to 5 speeds
They had these 4 ratios: 2.47 / 1.47 / 1.00 / 0.75
The 5R's have these 5 ratios: 2.47 / 1.87 / 1.47 / 1.00 / 0.75
1st(2.47) x OD(.75) = 1.86.................the "new" 2nd gear
Since the Bell housings can not be changed without complete disassembly of the transmission, and a 4.0l trans won't bolt to a 3.0l engine, you can't easily swap a 5R44E for a 5R55E, and really no reason to.
#4
RF Veteran
iTrader: (1)
One upgrade you can do, and should do, to any Automatic is to add a second transmission cooler.
Heat is what kills automatics, especially the newer ones with electric solenoids inside.
Knocking off a few degrees of heat will add a few years of life, fair trade for under $100, they are not just for towing
Heat is what kills automatics, especially the newer ones with electric solenoids inside.
Knocking off a few degrees of heat will add a few years of life, fair trade for under $100, they are not just for towing
#5
2001 and up 2.3l and 3.0l will have 5R44E 5-speed
1997 and up 4.0l had 5R55E 5-speed
They look identical, I believe the 5R55E had stronger output shaft
The 5th gear was added using computer(PCM) software, 2nd gear was 1st gear with overdrive engaged, lol, "very clever these Americans"
4R44E(2.3l/3.0l) and 4R55E(4.0l only) were the 4 speeds that were changed to 5 speeds
They had these 4 ratios: 2.47 / 1.47 / 1.00 / 0.75
The 5R's have these 5 ratios: 2.47 / 1.87 / 1.47 / 1.00 / 0.75
1st(2.47) x OD(.75) = 1.86.................the "new" 2nd gear
Since the Bell housings can not be changed without complete disassembly of the transmission, and a 4.0l trans won't bolt to a 3.0l engine, you can't easily swap a 5R44E for a 5R55E, and really no reason to.
1997 and up 4.0l had 5R55E 5-speed
They look identical, I believe the 5R55E had stronger output shaft
The 5th gear was added using computer(PCM) software, 2nd gear was 1st gear with overdrive engaged, lol, "very clever these Americans"
4R44E(2.3l/3.0l) and 4R55E(4.0l only) were the 4 speeds that were changed to 5 speeds
They had these 4 ratios: 2.47 / 1.47 / 1.00 / 0.75
The 5R's have these 5 ratios: 2.47 / 1.87 / 1.47 / 1.00 / 0.75
1st(2.47) x OD(.75) = 1.86.................the "new" 2nd gear
Since the Bell housings can not be changed without complete disassembly of the transmission, and a 4.0l trans won't bolt to a 3.0l engine, you can't easily swap a 5R44E for a 5R55E, and really no reason to.
#6
A/T
One upgrade you can do, and should do, to any Automatic is to add a second transmission cooler.
Heat is what kills automatics, especially the newer ones with electric solenoids inside.
Knocking off a few degrees of heat will add a few years of life, fair trade for under $100, they are not just for towing
Heat is what kills automatics, especially the newer ones with electric solenoids inside.
Knocking off a few degrees of heat will add a few years of life, fair trade for under $100, they are not just for towing
#8
RF Veteran
iTrader: (1)
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