It Doesn't Look Like Much.
6th Gear Member
Joined: Apr 2007
Posts: 10,468
From: California
This is something to keep in mind, and should help you sleep better at night, as far as transmission ratings.
The ft-lb or hp ratings that engineers give to a transmission, is the maximum CONTINUOUS input that the transmission can hold for a specified length of time(service life at full load). No one knows the actual length of time except the trans engineers, but generally it's pretty absurd, like in the tens of thousands of hours. So assuming proper lubrication and temperature, a trans rated for 600lb-ft at the wheels, will hold that much power for something like 40,000hours continuously(assuming lube and temp remain up to snuff). They can handle short bursts from shock load much higher than the rating(and indeed when hard shifting occurs the shock loading puts FAR more stress on the trans than the engine can).
More power output and that expected life drops, less power output and it lasts longer. And when you consider than most of the driving for a street car you're producing very little power......you see where that goes. As a for instance, the TKO 600 I have in my Mustang is rated as 600lb-ft at the transmission by TREMEC....but they've run season after season after season behind engines producing 1,000-1,500hp, and I've never heard of anyone actually breaking one from too much power.
Assuming the case for the trans is up to it, and it's properly maintained....if you're producing 600lb-ft or less at the wheels, chances are that trans will outlive your car in street/strip use.
The ft-lb or hp ratings that engineers give to a transmission, is the maximum CONTINUOUS input that the transmission can hold for a specified length of time(service life at full load). No one knows the actual length of time except the trans engineers, but generally it's pretty absurd, like in the tens of thousands of hours. So assuming proper lubrication and temperature, a trans rated for 600lb-ft at the wheels, will hold that much power for something like 40,000hours continuously(assuming lube and temp remain up to snuff). They can handle short bursts from shock load much higher than the rating(and indeed when hard shifting occurs the shock loading puts FAR more stress on the trans than the engine can).
More power output and that expected life drops, less power output and it lasts longer. And when you consider than most of the driving for a street car you're producing very little power......you see where that goes. As a for instance, the TKO 600 I have in my Mustang is rated as 600lb-ft at the transmission by TREMEC....but they've run season after season after season behind engines producing 1,000-1,500hp, and I've never heard of anyone actually breaking one from too much power.
Assuming the case for the trans is up to it, and it's properly maintained....if you're producing 600lb-ft or less at the wheels, chances are that trans will outlive your car in street/strip use.
Thread Starter
6th Gear Member
Joined: Jun 2006
Posts: 11,565
From: Jersey
This is something to keep in mind, and should help you sleep better at night, as far as transmission ratings.
The ft-lb or hp ratings that engineers give to a transmission, is the maximum CONTINUOUS input that the transmission can hold for a specified length of time(service life at full load). No one knows the actual length of time except the trans engineers, but generally it's pretty absurd, like in the tens of thousands of hours. So assuming proper lubrication and temperature, a trans rated for 600lb-ft at the wheels, will hold that much power for something like 40,000hours continuously(assuming lube and temp remain up to snuff). They can handle short bursts from shock load much higher than the rating(and indeed when hard shifting occurs the shock loading puts FAR more stress on the trans than the engine can).
More power output and that expected life drops, less power output and it lasts longer. And when you consider than most of the driving for a street car you're producing very little power......you see where that goes. As a for instance, the TKO 600 I have in my Mustang is rated as 600lb-ft at the transmission by TREMEC....but they've run season after season after season behind engines producing 1,000-1,500hp, and I've never heard of anyone actually breaking one from too much power.
Assuming the case for the trans is up to it, and it's properly maintained....if you're producing 600lb-ft or less at the wheels, chances are that trans will outlive your car in street/strip use.
The ft-lb or hp ratings that engineers give to a transmission, is the maximum CONTINUOUS input that the transmission can hold for a specified length of time(service life at full load). No one knows the actual length of time except the trans engineers, but generally it's pretty absurd, like in the tens of thousands of hours. So assuming proper lubrication and temperature, a trans rated for 600lb-ft at the wheels, will hold that much power for something like 40,000hours continuously(assuming lube and temp remain up to snuff). They can handle short bursts from shock load much higher than the rating(and indeed when hard shifting occurs the shock loading puts FAR more stress on the trans than the engine can).
More power output and that expected life drops, less power output and it lasts longer. And when you consider than most of the driving for a street car you're producing very little power......you see where that goes. As a for instance, the TKO 600 I have in my Mustang is rated as 600lb-ft at the transmission by TREMEC....but they've run season after season after season behind engines producing 1,000-1,500hp, and I've never heard of anyone actually breaking one from too much power.
Assuming the case for the trans is up to it, and it's properly maintained....if you're producing 600lb-ft or less at the wheels, chances are that trans will outlive your car in street/strip use.
Thread Starter
6th Gear Member
Joined: Jun 2006
Posts: 11,565
From: Jersey
6th Gear Member
Joined: Oct 2003
Posts: 8,635
From: North Cackilacky
Mr I'mnotgonnaspendanymoneyonthisjunkanymore. Good jorb!
6th Gear Member
Joined: Jan 2008
Posts: 6,395
From: colorado
nice tran's
just to update the long winded post by 67mustang302, I was told by the people I bought my transmission from that the TKO600, and most other transmissions are rated for a 24 hour period.
So if you could produce 601hp/torque for 24 hours strait, it would probably bust.
They said themselves that the TKO 600's though have lived up to 900hp for years. just like 67mustang302 said. so I think this trans you got is a great investment, and im sure it wasn't cheap! Thats why I went with a beefed up T5 instead of a tko600, it was to much money for me
just to update the long winded post by 67mustang302, I was told by the people I bought my transmission from that the TKO600, and most other transmissions are rated for a 24 hour period.
So if you could produce 601hp/torque for 24 hours strait, it would probably bust.
They said themselves that the TKO 600's though have lived up to 900hp for years. just like 67mustang302 said. so I think this trans you got is a great investment, and im sure it wasn't cheap! Thats why I went with a beefed up T5 instead of a tko600, it was to much money for me
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