specifications on HD4060 Allison Tranny - Luxury Coach Lifestyles
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Old 01-08-2012, 09:23 PM   #1
encantotom
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Default specifications on HD4060 Allison Tranny

Here are the spec's.

that matches the spec sheet that is in my Newell book as well.

so, how do i intrepret this? since the series 60 is rated at 500 hp and 1550 lb-ft at 1200rpm. so i assume that means the specialty rating applies. the torque/hp sheet for my engine says Series 60 Motor Coach.

so does that mean that changing the DDEC to have higher HP and torque pushes the tranny beyond its limits?

tom

Standard Rating Gross input power (maximum).......................450 hp (336 kW) Gross input torque (maximum)................1460 lb ft (1979 Nm) Net input power (maximum).........................445 hp (332 kW) Net input torque (maximum)..................1435 lb ft (1946 Nm) Rated input speed (minimum-maximum)..............1700 - 2300 rpm HD 4060 Specialty Rating+ Gross input power (maximum).......................525 hp (391 kW) Gross input torque (maximum)................1550 lb ft (2102 Nm) Net input power (maximum).........................500 hp (373 kW) Net input torque (maximum)..................1550 lb ft (2102 Nm) Rated input speed (minimum-maximum)..............1700 - 2300 rpm
Typical Applications (go to top)
Linehaul/Shorthaul Construction Hauler Dump Truck Agricultural Tractor Motorhome Transit Mixer Fire Truck Refuse (side load) Refuse Utility On/Off-Highway Logging Truck Lowboy Equipment Haulers

Specialty Vocations*

Fire Truck Motorhome Tactical Military Vehicles Other applications are available.
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Old 01-08-2012, 10:01 PM   #2
HoosierDaddy
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I'm not a mechanical engineer but I'm thinking that these ratings are the result of the manufacturers race to advertise 500 hp. If you consider the duty rating required for construction equipment versus a highway application such as a motorhome there is a wide variance in operating conditions ie. start/stop cycles,cooling requirements, time under max load/cycle etc. So a trans that would give acceptable service at 500 hp over the road would not withstand 500 hp in severe conditions.
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Old 01-08-2012, 11:22 PM   #3
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Coach #1278 is listed on the classified with a 625 Cat & HD4060MH ?
Later 600+HP list the HD4000 trans.
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