Stronger Transmission For My 2003 Avalanche Z71

Djurre-Avalanche · February 17, 2011

As some of you know, i am currently installing a Magnacharger on my 2003 Chevrolet Avalanche Z71.

I want a stronger transmission as well.

I don't think the stock 4L60E will handle 441 hp and 503 lbft torque.

Which manufacturer in the USA sells very good 4L65E transmissions?

I found this:

http://monstertrans.com/store/products/4L6...7D6.0L-4WD.html

I really want a stronger transmission that i can swap with my 4L60E, like plug and play.

I want a transmission that can handle 441 hp and 503 lbft torque without any problems.

L76PWRD · February 17, 2011

You can beef up your 4l60 pretty good, the 65 is very similar to the 60 just beefed up from the factory. A performance built should make it very strong, if you don't think it will be strong enough you can upgrade to a 4l80 but it would be harder to install.

AirForceAngler · February 17, 2011

Check with some good aftermarket trans companies like B&M or TCI. I'm sure they'll be able to hook you up. Might be a bit pricey though, but probably cheaper or comparable to getting a new 4L65E.

vettelovralexand · February 17, 2011

I would go with a Performabuilt or FLT transmission when I was putting my money on a trans to hold serious power.

Djurre-Avalanche · February 17, 2011

I would go with a Performabuilt or FLT transmission when I was putting my money on a trans to hold serious power.

I live in the netherlands.

I asked what it should cost when i want to upgrade my 4L60E.

They said it would cost me between 6000 and 8000 usd max!

So that's why i'd like to buy a complete and strong transmission in the states.

What do you guys think a rebuild and strong 4L65E would cost me, are there shops out there who sell complete (rebuild and stronger) transmissions?

desrtrat · February 17, 2011

this will be more than enough for your needs..

http://www.finishlinetrans.com/transmissio...emeDuty4L65.htm

PLUS SHIPPING..

good luck

Djurre-Avalanche · February 17, 2011

this will be more than enough for your needs..

http://www.finishlinetrans.com/transmissio...emeDuty4L65.htm

PLUS SHIPPING..

good luck

So i have to count on usd 3000? (i don't have an exchange transmission)

Anyone that knows this monstertrans.com store?

Any good, any bad?

vettelovralexand · February 17, 2011

I would go with a Performabuilt or FLT transmission when I was putting my money on a trans to hold serious power.

I live in the netherlands.

I asked what it should cost when i want to upgrade my 4L60E.

They said it would cost me between 6000 and 8000 usd max!

So that's why i'd like to buy a complete and strong transmission in the states.

What do you guys think a rebuild and strong 4L65E would cost me, are there shops out there who sell complete (rebuild and stronger) transmissions?

I don't guess I see what you are saying. Any 4l60 or 4l65 or 4l70 will have trouble handling a lot of power for a long time, but either of these companies could make a transmission for 3k that would handle what you are after. The shipping would kill you but I doubt it would be an extra 3k.

chas0218 · February 18, 2011

there is also probuilt transmissions, i have bought a few parts from him for my 700r4 and the 4l60e is the same tranny except a detachable bellhousing.

Here is the site: http://www.700r4l60e.com/