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L460-E, is it in the tahoe z71 too?

tealboy

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tealboy Enthusiast

tealboy

Posted
Posted

I have a dealer currently searching for a 2005 or 2006 used Z71 4x4 Tahoe and saw something about slipping tranny, but haven't found enough details to know exactly what the problem is and whether that is the same tranny in the veh i am about to buy. Should i reconsider my purchase? Pls advise. I expect to have the truck within 2 weeks.

Cadha13 Enthusiast

Cadha13

Posted
Posted

The 4L60-E is probably the best RWD auto OD transmission. Used from the S10's to 3/4 ton trucks with little modification. All 1500 series with 4spd OD auto's are the 4L60-E or the older non electronic trans before 1991 the 4L60 ie 700-R4. So the only trans in the Tahoes are the 4L60-E. I don't like the 4L60 series because I dosen't last as long as virtually any manual trans. But, No one puts manual trans in these trucks anymore, so everyone is stuck with the 4L60-E in virtually in all trucks these days. SUV=4L60-E 2000+. still better than the others. :flag:

Elwood 2000 Senior Enthusiast

Elwood 2000

Posted
Posted

It is a pretty good tranny. If you tow constantly I have heard of premature failures, but since you are looking at a Tahoe, you should be just fine for a very long time with proper maintenance.

Ted_Grevers Enthusiast

Ted_Grevers

Posted
Posted
I have a dealer currently searching for a 2005 or 2006 used Z71 4x4 Tahoe and saw something about slipping tranny, but haven't found enough details to know exactly what the problem is and whether that is the same tranny in the veh i am about to buy.  Should i reconsider my purchase?  Pls advise.  I expect to have the truck within 2 weeks.

 

 

 

 

The transmission slip problem is more than likely a firmware software upgrade. It's not a fault of the actual transmission itself. I have this problem with my 05 Avalanche, but, it only happens once every 6 months or so. It's just a matter of going in to get it upgraded, which I'll do during an oil change at some point. Don't make the transmission the deciding factor for an 05, unless you're getting a Diesel. ;)

 

-t

mmmikkke Senior Enthusiast

mmmikkke

Posted
Posted

As *if* the upgrade actually fixes the problem... If GM is mystified about the cause of the problem, how can they fix it?

fossil Enthusiast

fossil

Posted
Posted

With a redesign, you can't help but wonder why they didn't put the 4L80E in or a totally new redesign tranny if you are designing a truck from a clean sheet of paper. The 4L60E has upshift clunk problems of which there are no known fixes because of the the way the band and clutches interact. Major design flaw there.

06Silverado5.3LT Enthusiast

06Silverado5.3LT

Posted
Posted

Never had any major problems with my 2000 Silverado's transmission. Had it for 6 years and put 65,000 miles on it in that time. The reason I say I never had any "major" problems is because I did have an issue from time to time where I would be sitting at a redlight and I would take off and the tranny would act like it was in Neutral. Never took into the dealer for it though. It probably did that 5 times or so. Other than that it was bulletproof. I drove the heck out of that truck, so I was very pleased with it.

 

I have not experienced this problem on my 06 so far. Of course, I only have 500 miles on it right now...lol.

svensk Senior Enthusiast

svensk

Posted
Posted

They don't put the 4l80 into light duties because of cost. They want to leave it has more of an incentive for people to buy medium duty trucks instead. I think they fear it would cut into those sales.

 

For 6L trucks and HO 6's in 1/2 tons they have the 4l70 which is a redesigned 4l60e to take more punishment. They are only offered in vortecMax's, and SS etc.

OUMike Senior Enthusiast

OUMike

Posted
Posted

Hmm. Not sure how the 4L60 got the bad rap. I got over 200k on mine. Not a lot of towing or what not but still..

 

Maybe the 5.3s are harder on them?

06Silverado5.3LT Enthusiast

06Silverado5.3LT

Posted
Posted
Hmm.  Not sure how the 4L60 got the bad rap.  I got over 200k on mine.  Not a lot of towing or what not but still..

 

Maybe the 5.3s are harder on them?

 

 

 

 

Well, more horsepower and torque would make it harder on it I guess, but I dont think that its enough to make it fail prematurely. Despite what people say the 4L60 is a great transmission IMO.

pwall Senior Enthusiast

pwall

Posted
Posted

I have 127K kms (79K miles) on my truck. It spent it's first 2 years towing a 30ft travel trailer.

So far, no issues with the tranmission at all.

ZZebes Senior Enthusiast

ZZebes

Posted
Posted

the 4l60-E is a great tranny with most engines BUT as it has been mentioned before, the 5.3L is just BARELY within the 4l60-E's specs.

 

according to the GM Media site, the capcity of the 4l60-E is 350 lb/ft of torque, just barely above the 5.3's rated 335 lb/ft of tourque so even modest power adders can cause problems

95Sierra2500 Senior Enthusiast

95Sierra2500

Posted
Posted

I've seen 700R4s fail after 90k miles, and I've seen them last 180k miles. I currently have one in my '95 that as far as I know has never been rebuilt, and I'm pushing 200k on the clock. My parents towed a 35' travel trailer with their '90 suburban and it ripped the trans out after 90k miles (pretty good for hauling an 8k lb trailer). Had it rebuilt by a guy who does race transmissions, and that trans held up until my sister decided to abuse it and ate the clutches and basically the entire inside of the trans after 180k miles.

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