Allison 1000 Gear Ratios
2001 - 2005 Model Years, 5 Speed Transmission
Gear |
Ratio |
1st |
3.094 : 1 |
2nd |
1.809 : 1 |
3rd |
1.406 : 1 |
4th |
1.00 : 1 |
5th |
0.711 : 1 |
Rev |
4.48 : 1 |
2006 - 2019 Model Years, 6 Speed Transmission
Gear |
Ratio |
1st |
3.094 : 1 |
2nd |
1.809 : 1 |
3rd |
1.406 : 1 |
4th |
1.00 : 1 |
5th |
0.711 : 1 |
6th |
0.614 : 1 |
Rev |
4.48 : 1 |
Allison 1000 Transmission Specs
Transmission: |
Allison 1000 |
|
Type: |
5 & 6 speed automatic transmission (see application breakdown below) |
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Manufacturer: |
Allison Transmission |
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Production Plant: |
Allison Transmission Plant, Baltimore, MD |
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Predecessor: |
General Motors 4L80E |
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Applications: |
2001 - 2005 GMC Sierra 2500 HD, 3500 HD (5 speed, w/ 6.6L Duramax diesel) |
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Case Material: |
Die cast aluminum |
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Max Input Torque: |
2001 - 2004 models |
520 lb-ft |
2005 models |
565 lb-ft |
|
2006 - 2007 models |
650 lb-ft |
|
2008 - 2009 models |
660 lb-ft |
|
2010 - 2016 models |
765 lb-ft |
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Max Shift Speed: |
3,300 rpm (w/ Duramax diesel) |
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Weight: |
~ 330 lbs dry, 356 lbs with ATF |
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ATF Type/Spec: |
DEXRON-VI automatic transmission fluid |
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Transmission Filter P/N: |
2001 - 2005 sump filter |
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2006 - 2010 sump filter |
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2011 - 2019 sump filter |
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2001 - 2019 external filter |
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Service Intervals: |
Replace transmission filter and fluid every 50,000 miles under normal operating conditions or 25,000 miles under "severe" operating conditions |
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Features: |
• Optional PTO provisions |