6Sp auto conversion? [Archive] - Chevy TrailBlazer, TrailBlazer SS and GMC Envoy Forum

: 6Sp auto conversion?


LT1GMC
08-26-2007, 11:22 PM
Anyone consider an auto 6sp conversion? The 4.03 first gear would allow us to get away from having to need a 4.10 rear, which outta help performance and mileage. They are in Escalades, Denalis, and others, 07 and up. The truck ones ought to be close in fit, of course the Vette one wouldn't.

06voy
08-26-2007, 11:32 PM
It would be nice but I dont think they will fit. Also would take a lot of programming.

Gord
08-27-2007, 03:12 PM
My brother is researching the 6spd conversion for me, not sure how much programming would be required but he seems to think the mechanical end of things would be reasonably easy with a kit from advanced adapters.
(still trying to see how much of a challenge the AWD part poses though).

LT1GMC
08-27-2007, 07:12 PM
I don't think there really is much difference between the physical dimensions of the Trailblazer and Escalade transmissions, not sure why an adapter would be needed as they have the same engine blocks. As far as the programming, the new units I believe have freestanding transmission controllers inside the transmission. Besides, it has to be WAY easier than a conversion to a 6 sp manual, which I have done on a Corvette.

TrailblazerSS
08-27-2007, 07:34 PM
Search is your friend:

http://forums.trailvoy.com/showthread.php?t=12167

Tons of good technical information, not speculation, from those that have tried...

Lots of difficulties: Not only size, look at the bellhousing bolt pattern - Different, input shaft diameter - different, etc. etc.

Anything can be done, all it takes is money.

LT1GMC
08-27-2007, 10:45 PM
Thanks for the great info. Guess this is why GM didn't do it themselves, they had everything to gain if it would be done within reason.

LWP
08-28-2007, 01:44 AM
I think it would be a very easy swap. As the SSR has the 6 Speed option and they are made from a TB chassis........................LWP

Gord
08-28-2007, 11:26 AM
I think it would be a very easy swap. As the SSR has the 6 Speed option and they are made from a TB chassis........................LWP

...that may be true for those with RWD TBSS but not so sure it's good for the AWD crowd...

TrailblazerSS
08-28-2007, 02:26 PM
I think it would be a very easy swap. As the SSR has the 6 Speed option and they are made from a TB chassis........................LWP

Six speed Manual
This thread is about the six speed Automatic

BUC NASTY
09-07-2007, 07:10 PM
i wish we can have 6sp gear...but not possible :worried:

Envoy Fan
09-07-2007, 07:35 PM
Sux the Chevrolet Equinox can have a 6 speed and the TB gets a 4 :mad::hissy:

ScarabEpic22
09-07-2007, 11:22 PM
Sux the Chevrolet Equinox can have a 6 speed and the TB gets a 4 :mad::hissy:

Yeah, but at least we are a realy SUV and not a CUV, plus they are FWD (or "AWD") and slower.

Syclone Rob
09-11-2007, 11:20 PM
I'd be happy with a 4l80e conversion.. I just want a tranny I can beat on and not worry about it self destructing.

BUC NASTY
09-12-2007, 12:40 AM
4l60e and 4l80e are the same transmission. the only difference is that the 4l80e has speed sensors and 4L60E does not. If your were to change your transmission from a 4l60e to an 4l80e nothing will change except that you will be wasting money. I ask RPM about this and they recommend to just get an upgrade transmission not swaping from an 4l60e to an 4l80e.

Envoy Fan
09-12-2007, 02:17 AM
Thought the 4l80e was physically larger than a 4l60e :undecided

TrailblazerSS
09-12-2007, 08:06 AM
Thought the 4l80e was physically larger than a 4l60e :undecided
It is. There are way more differences:

4L60E 4L80E
Weight 164 225
Ratios:
1st 3.06 2.48
2nd 1.75 1.48
3rd 1.00 1.00
4th 0.70 0.75

Syclone Rob
09-12-2007, 10:10 AM
4l60e and 4l80e are the same transmission. the only difference is that the 4l80e has speed sensors and 4L60E does not. If your were to change your transmission from a 4l60e to an 4l80e nothing will change except that you will be wasting money. I ask RPM about this and they recommend to just get an upgrade transmission not swaping from an 4l60e to an 4l80e.

I'm sorry but this is not true. They 4l80e is not the same as the 4l60e.. Man, its actually a totally different tranny...
The 4L80E is an electronic overdrive transmission derived from the venerable Turbo 400. The 4L60E/4l70E is basically an electronic transmission derived from the 700-R4. The 4L80E is much stronger and is common behind a lot of 3/4 ton and 1 ton Chevy/GMC trucks.
Aftermarket companies are starting to make performance parts for this tranny as hot rodders are realising the power that these trannys can take. If this tranny can run in a 1-ton truck and tow 8-10k lbs.. man its a cake walk in a tbss.

A fairly stock 4l80e is as strong as a built 4l60e. Sure it weighs about 50lbs more but I don't mind that for a peice of mind and not worry about blowing up the tranny.

ttamrettus
09-12-2007, 12:18 PM
here is a history.

http://en.wikipedia.org/wiki/Turbo-Hydramatic#4L65-E

GTPprix
09-12-2007, 02:27 PM
I cringed when I saw this thread LOL :D

Sparkz28ss
09-12-2007, 06:19 PM
4l60e and 4l80e are the same transmission. the only difference is that the 4l80e has speed sensors and 4L60E does not. If your were to change your transmission from a 4l60e to an 4l80e nothing will change except that you will be wasting money. I ask RPM about this and they recommend to just get an upgrade transmission not swaping from an 4l60e to an 4l80e.

eeee..... no




the only trans I would spend time and money to put in would be a t-56

PROSPHOTO
09-12-2007, 06:53 PM
4l60e and 4l80e are the same transmission. the only difference is that the 4l80e has speed sensors and 4L60E does not. If your were to change your transmission from a 4l60e to an 4l80e nothing will change except that you will be wasting money. I ask RPM about this and they recommend to just get an upgrade transmission not swaping from an 4l60e to an 4l80e.

That is an inaccurate statement...the 30/40/45/60/65/80 designation in GM tranny's refers to the transmissions relative torque capacity :yes:

For example...a 60 series would be the equivalent of an old 350 tranny, where an 80 series would be the equivalent of a 400

BUC NASTY
09-12-2007, 08:09 PM
of course a "stock" 4l60e is different than an "stock" 4l80e. But an upgrade 4l60e is the same as an upgrade 4l80e except that 4l80e is more heavier and has speed senors. Thats what RPM told me. so there is no point of switching from 4l60e to an 4l80e. just get an upgrade 4l60e transmission. which can handle up to 600 horespower same as an upgrade 4l80e.

Syclone Rob
09-14-2007, 12:26 AM
of course a "stock" 4l60e is different than an "stock" 4l80e. But an upgrade 4l60e is the same as an upgrade 4l80e except that 4l80e is more heavier and has speed senors. Thats what RPM told me. so there is no point of switching from 4l60e to an 4l80e. just get an upgrade 4l60e transmission. which can handle up to 600 horespower same as an upgrade 4l80e.


A upgraded 80e will OUTDO an upgraded 60e.. No matter what.. it can just take the abuse... The weight difference is no noticeable and there is barely any difference in power loss between the two. THey are different trannys stock or not.. but the 80e is just plain more robust.

Basically, a stock 80e can handle the same as an average upgraded 60e. a built 80e can handle over 1300hp no problem. If that is what RPM is telling you. .man I'm sorry, I would get a second oppinion

ltz03
09-14-2007, 11:36 PM
my buddys father-in-law has a twin turboed high 7sec car with a 4l80 and he has around 1500hp there is no way ANY 4l60/70 can handle that kinda of abuse..but anyway alot of people have looked into this idea before some with a great deal of tuning experience and it would cause havic on things. it can be done, well anything can be done just how deep are your pockets!!! you can spend 700-1000 on parts to build up the 4l70 to handle more than most will throw at it and if you are worried about milage and fuel economy you sure did not buy the right truck!!!