Need help with 4l60E 2002 LT1 4.3, to 2002 LS1 4.3
12-22-2016, 11:02 AM
#1
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Need help with 4l60E 2002 LT1 4.3, to 2002 LS1 4.3 Searched everywhere and couldn't find this specific situation. Tranny went out on mom's truck, 2002 Silverado 4.3 with a 4L60E, LS1 motor and tranny of course. Number on top of tranny is 2CBD. Went and grabbed a tranny out of a 2002 Blazer 4.3 at a scrapyard, not knowing there would be a difference and ended up grabbing a LT1 based 4l60e. Number on top of the Blazer tranny is 2SHD. I tried installing the one from the yard and of course had issues with the torque converter I had bought for the LS based motor. It would not seat against the engine at all with the torque converter in.
I managed to return that torque converter and now have access to a LT1 torque converter for a 99 4L60E, and am wondering what all I would need to make it work. I'm assuming I need a crank spacer and longer bolts for the torque converter, but would like to know which part numbers specifically I will need and if the swap is even possible, considering electronics may somehow be different, even though they're from the same year.
Thank you in advance.
I managed to return that torque converter and now have access to a LT1 torque converter for a 99 4L60E, and am wondering what all I would need to make it work. I'm assuming I need a crank spacer and longer bolts for the torque converter, but would like to know which part numbers specifically I will need and if the swap is even possible, considering electronics may somehow be different, even though they're from the same year.
Thank you in advance.
12-22-2016, 05:26 PM
#2
I guess you mean a 5.3?
Few LT1's came with real 4L60E's, only '94 to '97
It's just an old small block or 4.3 liter transmission. Those at s10forum still haven't realized that vans and 4.3's use the old style trans and converter.
Simply put, the trans needs a bellhousing with a bolt hole at 12 o'clock. As long as it's the bell housing that belongs on it, it's an LS style transmission.
The electronics are the same on all 2002's.
Need to figure out what engine you have or else anything is a guess.
Few LT1's came with real 4L60E's, only '94 to '97
It's just an old small block or 4.3 liter transmission. Those at s10forum still haven't realized that vans and 4.3's use the old style trans and converter.
Simply put, the trans needs a bellhousing with a bolt hole at 12 o'clock. As long as it's the bell housing that belongs on it, it's an LS style transmission.
The electronics are the same on all 2002's.
Need to figure out what engine you have or else anything is a guess.
Searched everywhere and couldn't find this specific situation. Tranny went out on mom's truck, 2002 Silverado 4.3 with a 4L60E, LS1 motor and tranny of course. Number on top of tranny is 2CBD. Went and grabbed a tranny out of a 2002 Blazer 4.3 at a scrapyard, not knowing there would be a difference and ended up grabbing a LT1 based 4l60e. Number on top of the Blazer tranny is 2SHD. I tried installing the one from the yard and of course had issues with the torque converter I had bought for the LS based motor. It would not seat against the engine at all with the torque converter in.
I managed to return that torque converter and now have access to a LT1 torque converter for a 99 4L60E, and am wondering what all I would need to make it work. I'm assuming I need a crank spacer and longer bolts for the torque converter, but would like to know which part numbers specifically I will need and if the swap is even possible, considering electronics may somehow be different, even though they're from the same year.
Thank you in advance.
I managed to return that torque converter and now have access to a LT1 torque converter for a 99 4L60E, and am wondering what all I would need to make it work. I'm assuming I need a crank spacer and longer bolts for the torque converter, but would like to know which part numbers specifically I will need and if the swap is even possible, considering electronics may somehow be different, even though they're from the same year.
Thank you in advance.
12-22-2016, 05:32 PM
#3
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I guess you mean a 5.3?
Few LT1's came with real 4L60E's, only '94 to '97
It's just an old small block or 4.3 liter transmission. Those at s10forum still haven't realized that vans and 4.3's use the old style trans and converter.
Simply put, the trans needs a bellhousing with a bolt hole at 12 o'clock. As long as it's the bell housing that belongs on it, it's an LS style transmission.
The electronics are the same on all 2002's.
Need to figure out what engine you have or else anything is a guess.
Few LT1's came with real 4L60E's, only '94 to '97
It's just an old small block or 4.3 liter transmission. Those at s10forum still haven't realized that vans and 4.3's use the old style trans and converter.
Simply put, the trans needs a bellhousing with a bolt hole at 12 o'clock. As long as it's the bell housing that belongs on it, it's an LS style transmission.
The electronics are the same on all 2002's.
Need to figure out what engine you have or else anything is a guess.
No. It is a 4.3 on both vehicles. That's what I didn't understand. The Silverado has the LS based motor, with the hole in the top center of the bell housing and engine. The blazer I got the tranny from does not have that hole. What torque converter would I use if I just swapped the bell housing over? The splines are different lengths on each transmission. They're both 4" overall, but have different lengths per step.
Thank you for your help. It is greatly appreciated.
12-22-2016, 06:54 PM
#4
The LS based 4.3 didn't come out til 2014.
You can't swap just the bellhousing an converter.
EDIT: Also need to swap the input drum which has 80+ percent of the problem prone parts in it....might as well rebuild the trans at this point.
Also need to swap the stator support. Which means you have to take the pump out, which means you have direct access to the most commonly burned up or worn out clutch in that transmission.....
Just my opinion.....it's not worth doing unless you have driven the transmission or plan on rebuilding it.
You can't swap just the bellhousing an converter.
EDIT: Also need to swap the input drum which has 80+ percent of the problem prone parts in it....might as well rebuild the trans at this point.
Also need to swap the stator support. Which means you have to take the pump out, which means you have direct access to the most commonly burned up or worn out clutch in that transmission.....
Just my opinion.....it's not worth doing unless you have driven the transmission or plan on rebuilding it.
12-22-2016, 09:33 PM
#5
Moderator
Jays is explaining how to convert an LT 4L60E into an LS-style 4L60E.
Seems this is not what you want to do.
You can use the LT-style 4L60E on an LS engine by adding a spacer and elongating the holes in the flexplate a bit. Here are the parts you need:
Parts for older trans on LS engine
----------------------------------
12563532 flexplate to crank spacer
19257940 bolts $5.28(need 6 bolts)
You can optionally replace the flexplate with a dual-pattern one:
19260102 dual-pattern flexplate
Since you have to install the spacer and remove the existing flexplate, you should elongate the holes with the flexplate off the engine.
Some people chose to use a pilot extender/adapter instead of the spacer. If you chose this method, you may need to mod the extender so that it fits tightly on the converter's pilot. Else it will rattle.
Seems this is not what you want to do.
You can use the LT-style 4L60E on an LS engine by adding a spacer and elongating the holes in the flexplate a bit. Here are the parts you need:
Parts for older trans on LS engine
----------------------------------
12563532 flexplate to crank spacer
19257940 bolts $5.28(need 6 bolts)
You can optionally replace the flexplate with a dual-pattern one:
19260102 dual-pattern flexplate
Since you have to install the spacer and remove the existing flexplate, you should elongate the holes with the flexplate off the engine.
Some people chose to use a pilot extender/adapter instead of the spacer. If you chose this method, you may need to mod the extender so that it fits tightly on the converter's pilot. Else it will rattle.
12-22-2016, 10:32 PM
#6
Has anyone tried these spacers? I wouldnt try it on anything with performance in mind but a 6 cylinder DD I'd give it a shot. https://www.google.com/aclk?sa=l&ai=...Qwg8IKQ&adurl=
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12-23-2016, 12:40 PM
#8
So a 4l60e out of a silverado will bolt to a ls1 with no adapters?
I didn't know this.
I actually just got done digging through the core pile at my local junkyard and bought two ls style 4l60e's. It kinda makes sense because they never have ls engines here, these must have come from behind 4.3's.
I didn't know this.
I actually just got done digging through the core pile at my local junkyard and bought two ls style 4l60e's. It kinda makes sense because they never have ls engines here, these must have come from behind 4.3's.
12-28-2016, 10:21 AM
#9
Moderator
I don't know all the engine choices in trucks and SUVs, but the 4L60E behind every LS engine (except the C5 Vette) is the 300mm LS-style. And all of them from '98 through '07 are backwards compatible, both physically and electrically.
'09 are electrically different and I'm not sure about '08 as it may be 50/50.
I say "backward compatible" because the ECM/TCM starting in '06 needs a trans with ISS (Input Speed Sensor).
'09 are electrically different and I'm not sure about '08 as it may be 50/50.
I say "backward compatible" because the ECM/TCM starting in '06 needs a trans with ISS (Input Speed Sensor).