Stock 4l80e power

[weaponoffreedom]

Some say the 4l80e cant handle much power. I have another 2500 Suburban,6.0 Vortec, stroked to 6.6, then supercharged. Anyone running a stock 4l80e \ np246 in high HP applications?

I know what books say, I am wanting real world knowledge.

 

[MIHELA]

The 4L80E has been used in applications making over 2000HP when properly built. With a couple upgrades a stock bone trans can handle 600HP pretty routinely.

 

[df2x4]

I've never heard that complaint about a 4L80E before... Just the 4L60E.

I know there are at least a few people running 4L80Es with very minimal modifications (think shift kit, nothing else) in 1K+ HP drag/drive applications.

 

[618 Syndicate]

GM put the 4L80 behind 500 lb/ft diesels in HD trucks with a warranty, so figure they can handle at least that much bone stock. As mentioned above with basic upgrades they are reliable with serious power.

 

[Vikingdude]

4l80s will handle 400+ hp straight out of the junkyard. Nothing to complain about.

 

[Pinger]

Doesn't the '80' in 4L 80E signify 800 N.m torque capacity? 800 N.m = 533 lb.ft.

 

[weaponoffreedom]

Doesn't the '80' in 4L 80E signify 800 N.m torque capacity? 800 N.m = 533 lb.ft.

no clue

 

[618 Syndicate]

Doesn't the '80' in 4L 80E signify 800 N.m torque capacity? 800 N.m = 533 lb.ft.

Lol. No, the US doesn't use metric designations. The 80 is gvwr of 8000 lbs.
The first digit is number of forward gears: 4
Second spot is the orientation of the motor: longitudinal = L
Next two are vehicle weight it's designed for: 80 = 8000
The e indicates that it's electronically controlled.
4L80E

 

[Pinger]

Lol. No, the US doesn't use metric designations. The 80 is gvwr of 8000 lbs.
The first digit is number of forward gears: 4
Second spot is the orientation of the motor: longitudinal = L
Next two are vehicle weight it's designed for: 80 = 8000
The e indicates that it's electronically controlled.
4L80E

From here >> https://en.wikipedia.org/wiki/GM_4L80-E_transmission#Applications
This:
''The 4L80-E (RPO MT1) is rated to handle engines with up to 440 ft·lbf (597 N·m) of torque.[2] The 4L80-E is rated to a maximum GVWR of 18,000 lb, depending on the axle and vehicle.[3]''

So, I give you the torque capacity (though I could swear I read somewhere that GM rated its transmissions in N.m) but the GVWR?

 

[618 Syndicate]

From here >> https://en.wikipedia.org/wiki/GM_4L80-E_transmission#Applications
This:
''The 4L80-E (RPO MT1) is rated to handle engines with up to 440 ft·lbf (597 N·m) of torque.[2] The 4L80-E is rated to a maximum GVWR of 18,000 lb, depending on the axle and vehicle.[3]''

So, I give you the torque capacity (though I could swear I read somewhere that GM rated its transmissions in N.m) but the GVWR?

I may be wrong about what the "80" means in terms of gvwr, it may be 18k, but I'm 100% confident that it's gvwr and not torque capacity, and that the other digits are as I described.
Wonder if @MrPink can help?