How many people are running the 6l80/6l90?

[RFMSS]

Ok so how many people are running this tranny and is it worth the swap? I have my tax return coming back and I am trying to decide if I build my 4l70, go 4l80 or go 6l80. Please only chime in if you have experience with the 6l80.

[lt1z]

1 that I know of.

[Sleezy E]

Originally Posted by lt1z

1 that I know of.

Only one. He's been on it for a couple years now and is still ” working the kinks out of the tune” Jessie aka silveronyx aka trueblue Motorsports

I would go with an 80 Robert

[RFMSS]

Thanks Eric and Matt. I thought he already had everything worked out and that's why he is selling the kit. Oh well.

[Alvin]

I was thinking the other day how much I would like a whipple, 3.08 gear and a 6l80. Price is a big reason why its just a pipe dream for me. It is expensive!

[lt1z]

Originally Posted by Alvin

I was thinking the other day how much I would like a whipple, 3.08 gear and a 6l80. Price is a big reason why its just a pipe dream for me. It is expensive!

That would be a nice combo!

[SStripped]

Unless ur gonna go big power Robert I would just build the 70 with one of the vendors here that have lots of experience with our trucks

[RFMSS]

Well I'm pretty sure l92 heads, cam and a 100 shot will put me at some pretty big power

[TXBlownTBSS]

Originally Posted by RFMSS

Well I'm pretty sure l92 heads, cam and a 100 shot will put me at some pretty big power

You could run a built 70 all day with that power.

[SStripped]

I'd go phoenix 80 then

[RFMSS]

Hmmmm not quit sure which way I will go.

[SSilveronyxx]

There are no other Trailblazers with a 6L80/90 besides mine. Colorados and Canyons, yeah, but no TB's. Unless you're planning for more power or you've gotten fed up with rebuilding 4L70's I can't provide anyone with a reasonable reason for spending the bucks, besides "I just want one."

Yes the trans swap kills several birds with one stone (stronger, greater gear multiplication, potential greater fuel efficiency). But for what most people expect out of and use their TBSS for, it's an expensive proposition...especially if you're an '06 E40 AWD!

Not too many are interested until I can turn in a magic quarter mile time. Over the holidays I was able to get a 13.75@100 w/a 2.04 60ft. Not bad for a full weight 5200+lb AWD pig with heavy, 20x10 wheels, all season tires, pump gas, and CAI and cat-back. But I still know there was more in there because it rolled out the line (wanted more timing and fuel) and had 2 slight shift delays (it spins the motor so quickly and into parameters well beyond what the factory tune allows... whips past redline so fast in first gear!). I could have cheated and dropped the spare, taken out the rear seats, gone with lighter wheels, etc. But I'm not into sensationalism.

As stated in another thread, the reason I have yet to demonstrate its full potential is twofold. A) The amount of insane power limitations that are programmed into '07-09 TBSS's E67's is mind boggling. I'm always finding new areas of calibrations that GM snuck in to suppress the power of the LS2 in our applications. Sure I could cheat and play with PE and Spark like most tuners, but I'm trying to develop a full base dynamic engine calibration to consistently run wicked fast, still sit in traffic w/o overheating, still tow, and deal with 4 season temps. No to mention we want a transmission calibration that shifts hard when at WOT, but is smooth like butter otherwise, right? B) Time. Too many irons in the fire. Other 6L80/90 vehicle project inquiries, wrapping up college degrees, exhaust and valances, plus other miscellaneous projects.

I'd like to get the price down for more to get in, but as I can't at this point, I'm just enjoying having 2 of 2 6L80 TB's.

[Karch]

I'd settle for the 3.42's. Do they make 3.08's for our axle?
Don't forget to add a mild converter in there, maybe 2600-2800?

Jesse, correct me if I am wrong, but one TB with 6L80e, and one with 6L90e?

I think Jesse nailed it...it's more a really nice option, but very hard to justify the economics, at least at this time.

I'd absolutely love one, but, again, a bit tough on the wallet.
Seeing how I want a maggie as well, I am thinking of getting a used CTS-V, as it comes with both, with, perhaps, some powertrain warranty still in effect.

[Chase]

3,42 damn!! im goin 3.73

[lt1z]

Originally Posted by Chase

3,42 damn!! im goin 3.73

They are talking 6 spd autos here. The first three gears are steep.

[mbx5]

I seriously considered it...that and a T56....but I thought cost was a big obstacle, not to mention time and my own limitations of the actual skills to do it...Instead, my 4L80 and converter are $6gs...proven and working....some skill required to install, but no GM engineering required... Im guessing it would have cost $10-$12k to do a correct T56 install and w/o a guarantee of it working, I ditched that idea....but that was hard to do - there is something really sexy about being the first to do it - Jesse knows how that feels.... The 6L80 would be sweet as well...but I think Jesse mentioned a $9kish install.... Personally if I was going to shell out $9g's I would have just thrown my balls on the table and tried the T56...just didn't have the sack to do it this year....maybe someday, but probably not...

TCI has some 6-speeds out that are in a 4L80 case...look interesting - would be cool to see if that can be incorporated into our trucks w/ either TCM mod, or using TCI's control...

[XplicitPerformance]

4l80e can be done very reasonable and I wouldnt take a 2nd look at 4L70E. Far more failures than their should be built or not! Sure theres a few exceptions but they are rare! my 80E drove MUCH better!

[SuperStoopid]

I beat the crap out of my lvl 7 from FLT.

[Alvin]

I say stay with the 4l70 as long as you can. There are some fast cars out there on 60-70's. The advantage with the 6L is the extra gearing which isn't always best for drag racing but does feel nice and also gets better fuel mileage.

The 80 is a awesome option but I would save that for 600 rwhp +

[RFMSS]

Ya I am pretty sure I am going to stay with the 70. I have over 40k on my stock trans and it still feels really good. I think it all boils down to how you treat it and maintain it.