4L80e hp rating
10-07-2005, 05:40 PM
#12
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Originally Posted by zippy
if this were true, V8's would have been in cars quite a while ago. th 4T65E in theory should have a higher rating than a 4L60E and be equivilant to a 4L65E in torque capacity.
10-07-2005, 05:40 PM
#13
Originally Posted by parish8
i would start looking for some other cause. these things are tuff.
Gonna go take it out tonight, my tranny man wants to tear it down tomorrow so I will hopefully have an update by this time tomorrow. He was there when it happened and thinks the forward or direct clutches let go. Hopefully I will be back together by next Thurs-its the last test n tune of the season for my local track.
10-07-2005, 06:04 PM
#14
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Originally Posted by FarmerBeau
I looked up the conversion factors (1 Newton = .22481 lbs. force and 1 ft = .3048 meters) and got a really whacky answer. 80 N/m = 5.4818 ft/lbs Even my slow pos could break that thing. Maybe i could do it with my hand...LOL .according to that calculation. Are you sure that the 80 stands for Newton Meters? The whole thing sounds kind of wierd. 5.4818 ft/lbs of max torque that it can handle? Is my math incorrect?
10-07-2005, 07:28 PM
#16
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Originally Posted by desTRUCKtive
Zippy I did not quite understand you... do you mean that if this was true the 4T65E should be stronger when in fact it is not??
correct. when the latest generation of 3.8L was released in the gtp they had to put in so much torque management to keep the trans together that it was actually no faster than the previous generation. without the torque management and minor tuning though it was quite considerably faster than the previous generation L67, it just didn't show it because of the trans problem. the 4T65E couldn't hold a candle to the amount of power a 4L65E can handle. the same goes with the 60's. the 4L60E can handle close to 400hp on just programming changes and the 4T60E would be lucky to take 250-300hp in a lightweight car and still live.
10-10-2005, 09:59 PM
#17
On the GM powertrain site it states the following for the 4L80/85-E (I would assume these to be conservative ratings)
For Year 2006:
Maximum engine torque
440 lb-ft (597 Nm) (MT1) 4L80-E
460 lb-ft (624 Nm) (MN8) 4L85-E
Maximum gearbox torque
885 lb-ft (1200 Nm)
By means of comparision, here are the specs on the 4L60/65-E
Maximum engine torque
360 lb-ft (488 Nm) (M30) 4L60-E
400 lb-ft (542 Nm) (M32/M70) 4L65-E
Maximum gearbox torque
610 lb-ft (827 Nm) (M30)
670 lb-ft (910 Nm) (M32/M70)
Make your own conclusions
For Year 2006:
Maximum engine torque
440 lb-ft (597 Nm) (MT1) 4L80-E
460 lb-ft (624 Nm) (MN8) 4L85-E
Maximum gearbox torque
885 lb-ft (1200 Nm)
By means of comparision, here are the specs on the 4L60/65-E
Maximum engine torque
360 lb-ft (488 Nm) (M30) 4L60-E
400 lb-ft (542 Nm) (M32/M70) 4L65-E
Maximum gearbox torque
610 lb-ft (827 Nm) (M30)
670 lb-ft (910 Nm) (M32/M70)
Make your own conclusions
10-11-2005, 08:36 AM
#18
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Originally Posted by SnakeOiler
On the GM powertrain site it states the following for the 4L80/85-E (I would assume these to be conservative ratings)
For Year 2006:
Maximum engine torque
440 lb-ft (597 Nm) (MT1) 4L80-E
460 lb-ft (624 Nm) (MN8) 4L85-E
Maximum gearbox torque
885 lb-ft (1200 Nm)
By means of comparision, here are the specs on the 4L60/65-E
Maximum engine torque
360 lb-ft (488 Nm) (M30) 4L60-E
400 lb-ft (542 Nm) (M32/M70) 4L65-E
Maximum gearbox torque
610 lb-ft (827 Nm) (M30)
670 lb-ft (910 Nm) (M32/M70)
Make your own conclusions
For Year 2006:
Maximum engine torque
440 lb-ft (597 Nm) (MT1) 4L80-E
460 lb-ft (624 Nm) (MN8) 4L85-E
Maximum gearbox torque
885 lb-ft (1200 Nm)
By means of comparision, here are the specs on the 4L60/65-E
Maximum engine torque
360 lb-ft (488 Nm) (M30) 4L60-E
400 lb-ft (542 Nm) (M32/M70) 4L65-E
Maximum gearbox torque
610 lb-ft (827 Nm) (M30)
670 lb-ft (910 Nm) (M32/M70)
Make your own conclusions
COOL! Good find. Then the 80 and 60 didnt mean Nm afterall.
10-16-2005, 05:52 PM
#19
Originally Posted by FarmerBeau
does the 80 represent Newton meters?
The number represents the family and has no mathematical translation to its torque rating.
It will be interresting to see 6L80-E's finding their way into project trucks of the future. The 6L80-E won't be as precise of a shifter as the 80 though - it does 6 speeds with just 3 planetaries. That's the same number as the 4L80-E so you know some of those shifts are multi-event.
