Which transmission?

[phire]

Just curious which transmission comes with the 2006 model 5.3L 4x4, 4spd auto? Did they stop putting the 4L60E in and just go all out with 4L80E?

[MS3DALE]

With the 5.3 It'll have the 4L60E (RPO Option code "M30")

[phire]

Aww, too bad. Thanks for the info. At which point do they start using the 80? 6.0's?

 

Is the 4L60E really as inferior as everyone says it is?

[MS3DALE]

Yes,Most 6-liters have the 4L80E (MT1),But some 6.0's have the 4L65E (M32),4L70E (M70) or the 4L85E (MN8) It depends on what model truck its in.

 

And No...The 4L60E is not an inferior transmission,It is fine for the 1/2-ton trucks and in my opinion is a pretty stout tranny,but like all things can and will fail when pushed beyond its limits.

I've seen plenty of 4L80 and 4L80E's fail.

[Schmids5.3l]

I found a good article on the transmission. According to these people it will handle up to 370 ft lbs. I hope it handles more, maybe thats just the safest recomended..

 

http://www.sallee-chevrolet.com/frame.html...ions/4L60E.html

[phire]

Should be good enough... These 5.3's only put out 300HP/330ft/lb tq. (My numbers may be off slightly) but, the tranny should be able to handle a 5.3L juuust fine. I'm a firm believer in having an oversized transmission in everything, especially trucks. I'm one of those overkill guys that has to always buy something bigger than what I really need. I like having the overhead just-in-case. Plus, it means that your parts are inevitably going to last longer (in theory) because they aren't being pushed to their limits.

[asilverblazer]

Overkill, then put an Allison in and see how much motor it takes to turn that big-o-slush box. Bigger isn't exactly better in this case, if it is too big and stout the motor won't be able to turn it efficiently and so performance suffers. If you are worried about it have the 60 series rebuilt with stronger parts.

[phire]

Very true.. But, either way I still expect it to last a long time.... Afterall, it's a Chevy, right?!?

 

If and when the time comes for a rebuild, well, I'll cross that bridge if and when I come to it... For now, I'm enjoying a brand new, trouble free truck. =)

[redvett]

I used a built up 700R4 in my 1990 SS454 pickup that works just fine even today and has towed many trailers and done a fair amount of drag racing.

[forgottenmemory]

Aww, too bad. Thanks for the info. At which point do they start using the 80? 6.0's?

 

Is the 4L60E really as inferior as everyone says it is?

 

 

 

where is the code for which transmission you have? Is it stamped on the pan? ITs not in the window sticker so I was wondering my self

[Lennox]

Aww, too bad. Thanks for the info. At which point do they start using the 80? 6.0's?

 

Is the 4L60E really as inferior as everyone says it is?

 

 

 

where is the code for which transmission you have? Is it stamped on the pan? ITs not in the window sticker so I was wondering my self

 

 

 

I am wondering that also. How do you know what gears you have?

[Schmids5.3l]

Codes are in the glove box.