Yank 3600ss efficency
Thread Starter
TECH Enthusiast
iTrader: (5)
Joined: Jun 2006
Posts: 641
Likes: 0
From: Long Beach MS/Birmingham AL
Yank 3600ss efficency What is the efficiency of the yank 3600 not locked up? I know it has a 2.5str, but is it 99% efficient? 95% efficient? I can't seem to find anything about it.
I don't think there's such a thing as actual unlocked torque convertor efficencies. There may be general accepted ranges but a specific values,I doubt could be found.
STR is the torque multiplication value at 'full stall',let's use a transmission with a 'transbrake' as an example. With the transbrake engaged and the engine is sitting at 5000rpm and that engine is outputting 400ft.lbs. at 5000rpm,the trans is seeing 1000ft.lbs. with a 2.5str. As soon as transbrake is disengaged and trans begins to work against the weight of the vehicle to get it moving,the str drops almost immediately.
Take this into consideration,torque convertor 'slippage' is a function of applied power of the engine vs. encountered resistance. A particular engine and stall convertor used in a 3000lb. vehicle will have a different efficency value if that engine and stall convertor was used in a 4000lb. vehicle. More resistance=more slip= lower efficency.
STR is the torque multiplication value at 'full stall',let's use a transmission with a 'transbrake' as an example. With the transbrake engaged and the engine is sitting at 5000rpm and that engine is outputting 400ft.lbs. at 5000rpm,the trans is seeing 1000ft.lbs. with a 2.5str. As soon as transbrake is disengaged and trans begins to work against the weight of the vehicle to get it moving,the str drops almost immediately.
Take this into consideration,torque convertor 'slippage' is a function of applied power of the engine vs. encountered resistance. A particular engine and stall convertor used in a 3000lb. vehicle will have a different efficency value if that engine and stall convertor was used in a 4000lb. vehicle. More resistance=more slip= lower efficency.
