How much power can a stock 4L80E safely handle, before upgrades are needed? How about the Allison 5-speed and 6-speed?

starspangled6.0 · by **starspangled6.0** [OP] » Dec 22 2011, 6:29pm

Related Topics Weight limits with 85 Silverado 3/4 ton & goosenecks What transmissions work in my Sierra? Automatic transmissions: I hate them Power locks and Power Mirrors How much power Best way to get more power? How to get the most power out of my 4.3L Power Seat Power Steering switched power power windows Power Steering? Power struggle power mirrors

bsnowden · by **bsnowden** » Dec 22 2011, 6:37pm

I have seen in diesel power mags allison's holding up running 500 or 600 horsepower. I think I saw one with a truck that had around 700. I'm not sure how long they will last and i'm not sure how much abuse those guys put on them.

starspangled6.0 · by **starspangled6.0** [OP] » Dec 22 2011, 6:42pm

Were they unmodified transmissions? I wouldn't mind upgrading the tranny, if I was spending $10K on the engine already

. But, I'd like to know how much abuse they can take, before they need upgrading.

bsnowden · by **bsnowden** » Dec 22 2011, 6:52pm

Yes they were unmodified. If your really interested in upgrading your tranny go look at dieselpowermag.com or duramaxforum.com. These websites might be able to give you some specific numbers as far as hp and torque as to what these transmissions can actually handle.

bsnowden · by **bsnowden** » Dec 22 2011, 6:56pm

If you were going to put 10k into the motor it would probably be a good investment to put some money into the tranny.

Hartski · by **Hartski** » Dec 22 2011, 7:14pm

And if you're putting that much power through the tranny, you'll have to upgrade the rest of the drivetrain, too. Axles, driveshafts, ect. When you upgrade one thing, the next weakest link always fails.

wheeler82 · by **wheeler82** » Dec 22 2011, 8:37pm

not sure on the 4l80 e ...but the allison, i know i was always told when i had my old duramax, not to add anything over 125 hp over stock. You will start limping the tranny, and in turn damaging it. It will limp easier and easier after you do it once!

starspangled6.0 · by **starspangled6.0** [OP] » Dec 22 2011, 11:48pm

Hartski wrote:And if you're putting that much power through the tranny, you'll have to upgrade the rest of the drivetrain, too. Axles, driveshafts, ect. When you upgrade one thing, the next weakest link always fails.

Good point, Hartski. Sounds like a wonderful problem to have

! I haven't decided yet if I want to supercharge this truck, or just get a Duramax instead...

Random Image Attachments
new member with new truc... Attached by: ssdirt
4x4decal Attached by: Wxman
Noob Attached by: whynott
Signature Requests Attached by: twday87

How much power can a stock 4L80E safely handle, before upgrades are needed? How about the Allison 5-speed and 6-speed?

Power Limits of Transmissions

Power Limits of Transmissions

Re: Power Limits of Transmissions

Re: Power Limits of Transmissions

Re: Power Limits of Transmissions

Re: Power Limits of Transmissions

Re: Power Limits of Transmissions

Re: Power Limits of Transmissions

Re: Power Limits of Transmissions

Common search terms

Who is online

Transmission/Drivetrain Forum
Transmission and drivetrain related components. Discuss automatic and manual trans repairs and performance or talk about driveshafts or rear-ends and differentials. Diagnostics of 4-speed, 5-speed, or even 6-speed transmissions.
Post a new topic To create a new topic in Transmission/Drivetrain, click this button:
Previous topic Next topic