Lq4 4l60e questions
-Dalton
FTI COMPETITION CONVERTERS AND TRANSMISSIONS
"IT'S NOT CHEATING, IT'S THE COMPETITIVE EDGE."
1-866-726-8358
info@ftiperformance.com
FTIPerformance.com
FTI Converter build sheet
FTI COMPETITION CONVERTERS AND TRANSMISSIONS
"IT'S NOT CHEATING, IT'S THE COMPETITIVE EDGE."
1-866-726-8358
info@ftiperformance.com
FTIPerformance.com
FTI Converter build sheet
By going the custom converter route, you can bypass some of this, but we understand not everybody is looking to spend $800+ to get their swap project rolling.
-Brian
By going the custom converter route, you can bypass some of this, but we understand not everybody is looking to spend $800+ to get their swap project rolling.
-Brian
These older units are notoriously weak and when hooked up to a much more powerful LS engine, it won't last long, especially if it has many miles on it.
Of course, if it was recently rebuild with performance parts, then it should last.
EDIT - However there are more compatibility problems - see below.
Last edited by mrvedit; Oct 26, 2016 at 12:36 PM.
Trending Topics
These older units are notoriously weak and when hooked up to a much more powerful LS engine, it won't last long, especially if it has many miles on it.
Of course, if it was recently rebuild with performance parts, then it should last.
The Best V8 Stories One Small Block at Time
Which means you're in Gen 4 territory, so unless you plan to either convert it to a manual valve body or run a stand-alone controller, then figuring out which converter/flexplate you need is completely pointless.
I have no idea of whether they made an LQ4 (6.0L steel block) in '08, but any vehicle with a ECM/TCM combo (starting around '06 and probably all by '08) requires a 4L60E/70E with ISS (Input Speed Sensor). This TCM requirement cannot be disabled or "tuned out".
So you really need a '06-'08 4L60E/65E/70E which has ISS.
'09+ are electrically different and incompatible with earlier TCMs and even harnesses.
As far as trans goes, the $250 conversion box will convert the 58x/4x signals to 24x/1x for the Gen 3 ECU. 97 was the first year that a 60e is 100% to work with a Gen 3 ECU, before that the torque converter lacked PWM control. 96 Can be made to work depending on what the transmission came out of.
I suspect that the OP will decide this is MUCH more complex than expected.
Alternatively the trans could be upgraded, but will require a 300mm ISS input shaft/drum, ISS pump, ISS sensor, internal harness and perhaps a few other parts. And a 4L70E harness to the TCM. It would also require a LS-style bell housing unless a custom converter is used.
It really might be cheaper and certainly easier to find a '06-'06 transmission; just make sure it has ISS.
You may only need a modified flexplate and a spacer to your your trans and an LT-style converter. Or could order a custom converter from Circle-D or FTI which will have the LS-style pilot, but accept an LT-style input shaft.







