Rare 4l60e?? I'm confused. .
On The Tree
Joined: May 2013
Posts: 189
Likes: 12
From: Newman Lake, WA
The 5.7 Vortec truck engines were built with the classic Gen I V-8 platform. These used 298 mm converters with the shallow bell housings from '98-on. The earlier '96 and '97's 5.7 Vortecs used the one-piece truck "K" cases.
The LT's were the Gen II small-blocks; LT1, LT4 (and the "baby LT"; the 4.3 V-8). These were in the Corvettes, F-bodies and B-bodies. Reverse-flow cooling systems, Opti-Spark ignition, etc. They were said to be a "proof-of-concept" platform for some of what we now see in the LS engines. The LT's used 298 mm converters with the one-piece truck "K" cases, but with the outer ears cut off for exhaust clearance.
The LS's were, well.... the LS's. They all used the 300 mm converters and deeper bell housings with the bolt at the top, since GM removed the top bolt on the passenger side due to the #8 cylinder bore being so close.
Chris
Thread Starter
Teching In
Joined: Feb 2016
Posts: 15
Likes: 0
That is definitely a 4L60 LT setup that will use the 298mm style converter. Some late 4L60 LT did have the removable bellhousing. If this is definitely going on an LS engine, then we will need some stuff to adapt the OE converter over. If you are getting one built, then you can add all the adapters into the converter so it fits the OE flexplate. You could also go back to the junkyard and get a 4L60 LS and make the swap easier.
Chris
Chris
Moderator
Joined: Aug 2010
Posts: 7,322
Likes: 528
From: Ann Arbor, MI
No... The 298 mm converters were used behind the 5.7 Vortec and LT engines. The LS's all used 300 mm converters with the deeper bell housings. The Tahoes and Suburbans didn't get the LS engines until '01.
The 5.7 Vortec truck engines were built with the classic Gen I V-8 platform. These used 298 mm converters with the shallow bell housings from '98-on. The earlier '96 and '97's 5.7 Vortecs used the one-piece truck "K" cases.
The LT's were the Gen II small-blocks; LT1, LT4 (and the "baby LT"; the 4.3 V-8). These were in the Corvettes, F-bodies and B-bodies. Reverse-flow cooling systems, Opti-Spark ignition, etc. They were said to be a "proof-of-concept" platform for some of what we now see in the LS engines. The LT's used 298 mm converters with the one-piece truck "K" cases, but with the outer ears cut off for exhaust clearance.
The LS's were, well.... the LS's. They all used the 300 mm converters and deeper bell housings with the bolt at the top, since GM removed the top bolt on the passenger side due to the #8 cylinder bore being so close.
The 5.7 Vortec truck engines were built with the classic Gen I V-8 platform. These used 298 mm converters with the shallow bell housings from '98-on. The earlier '96 and '97's 5.7 Vortecs used the one-piece truck "K" cases.
The LT's were the Gen II small-blocks; LT1, LT4 (and the "baby LT"; the 4.3 V-8). These were in the Corvettes, F-bodies and B-bodies. Reverse-flow cooling systems, Opti-Spark ignition, etc. They were said to be a "proof-of-concept" platform for some of what we now see in the LS engines. The LT's used 298 mm converters with the one-piece truck "K" cases, but with the outer ears cut off for exhaust clearance.
The LS's were, well.... the LS's. They all used the 300 mm converters and deeper bell housings with the bolt at the top, since GM removed the top bolt on the passenger side due to the #8 cylinder bore being so close.
Can you see the picture in post #16 which the OP says is what he bought?
It is clearly an LS engine, yet has the Vortec cover. Unless I am missing something obvious, I am dumbfounded how this LS engine could have a 298mm trans on it from the factory. I'm back to thinking that someone at the YJ bolted the incompatible trans to it.
Then the OP's statement that the included converter worked perfectly on someone else's '04 Tahoe (would that also be an LS by '04?).
Thread Starter
Teching In
Joined: Feb 2016
Posts: 15
Likes: 0
Good. That is what I thought and have been posting for years.
Can you see the picture in post #16 which the OP says is what he bought?
It is clearly an LS engine, yet has the Vortec cover. Unless I am missing something obvious, I am dumbfounded how this LS engine could have a 298mm trans on it from the factory. I'm back to thinking that someone at the YJ bolted the incompatible trans to it.
Then the OP's statement that the included converter worked perfectly on someone else's '04 Tahoe (would that also be an LS by '04?).
Can you see the picture in post #16 which the OP says is what he bought?
It is clearly an LS engine, yet has the Vortec cover. Unless I am missing something obvious, I am dumbfounded how this LS engine could have a 298mm trans on it from the factory. I'm back to thinking that someone at the YJ bolted the incompatible trans to it.
Then the OP's statement that the included converter worked perfectly on someone else's '04 Tahoe (would that also be an LS by '04?).
Thread Starter
Teching In
Joined: Feb 2016
Posts: 15
Likes: 0
Either way I'm sure I can make it work. Really wish I wouldn't have tossed out the converter that was in it when I got the new one that way I could have compared it to others but I didn't plan on having this issue of course.
Moderator
Joined: Aug 2010
Posts: 7,322
Likes: 528
From: Ann Arbor, MI
It was actually the stall converter I bought from tci that fit on his 04 tahoe.Which was listed on summit racing as fitting 00-06 only. This engine/trans combo was completely bolted together with factory converter in place. Didn't look like it had been tampered with at all. I'm still puzzled about that part.
I am also puzzled and therefore should stop guessing.
Obviously getting a true LS style trans is your best bet.
On The Tree
Joined: May 2013
Posts: 189
Likes: 12
From: Newman Lake, WA
Good. That is what I thought and have been posting for years.
Can you see the picture in post #16 which the OP says is what he bought?
It is clearly an LS engine, yet has the Vortec cover. Unless I am missing something obvious, I am dumbfounded how this LS engine could have a 298mm trans on it from the factory. I'm back to thinking that someone at the YJ bolted the incompatible trans to it.
Then the OP's statement that the included converter worked perfectly on someone else's '04 Tahoe (would that also be an LS by '04?).
Can you see the picture in post #16 which the OP says is what he bought?
It is clearly an LS engine, yet has the Vortec cover. Unless I am missing something obvious, I am dumbfounded how this LS engine could have a 298mm trans on it from the factory. I'm back to thinking that someone at the YJ bolted the incompatible trans to it.
Then the OP's statement that the included converter worked perfectly on someone else's '04 Tahoe (would that also be an LS by '04?).
No LS engines came from the factory with 298 mm converters or supporting equipment (bell housing, stator support, input shaft, etc.). They were all 300 mm.
I would venture to say that someone at the wrecking yard bolted an early transmission to this LS engine. They will bolt right up, minus one bell housing bolt. The bolt pattern at the flex plate is different, though.
Moderator
Joined: Aug 2010
Posts: 7,322
Likes: 528
From: Ann Arbor, MI
If a converter was bolted to the flexplate, it was likely the stock "LS" style.
A 298mm input shaft will physically fit into an LS converter, but will not actually engage/work. Hence the YJ could do that and you wouldn't notice.
The only other possibility is, as mentioned before, a working LS engine and LT trans from a previous owner that made them work together. But certainly not from the factory.
TECH Junkie
Joined: May 2012
Posts: 3,046
Likes: 713
From: Poplarville, MS
I would not buy a TCI torque converter. It will not hold up and Summit Racing and TCI will not warranty it. Also when it goes out it will take your trans with it.
Last edited by mrvedit; Feb 17, 2016 at 05:20 PM. Reason: Typo