ThePIGSmith
06-24-2008, 20:01
My 1993 GMC 3500 Van is powered by a 6.2L Diesel and a 4L80E.
The 4L80E is bad.
I have a friend that turned me onto a small Chevy salvage yard.
I bought a 4L80E that came out of a Gasser for $300.
The yard owner told me that if it did not work, he would replace it or refund my $$$.
The tranny shop that I am having this swap performed at, told me that in those model years, there is no difference in a Gasser and Diesel 4L80E.
The difference is made up in the TCM.
He thought, maybe, the only difference might be the Torque Converter, but he did not think so and he would need to look it up.
This is one of only a couple of tranny shops in town that will install a junk yard unit.
Most others will not.
Of course, all I am paying for is the labor, tranny flush/new fluid/filter and the shop will not guarantee anything.
Without going into a lot of detail, I trust this shop to do good work.
But...I am slightly concerned.
I've always be taught that Diesel trannys and Gasser trannys are different.
The TC has a lower stall speed and the valve body is programmed with different shift points.
I was told on non electronic units that is true, with the exception of some late model 4L80E that was installed behind 6.5TD, those were slightly different.
My question to the group:
Is there any difference in a Gasser and Diesel 4L80E?
Would a Gasser 4L80E be any harm in my 6.2L powered van, even with a Diesel TCM?
The 4L80E is bad.
I have a friend that turned me onto a small Chevy salvage yard.
I bought a 4L80E that came out of a Gasser for $300.
The yard owner told me that if it did not work, he would replace it or refund my $$$.
The tranny shop that I am having this swap performed at, told me that in those model years, there is no difference in a Gasser and Diesel 4L80E.
The difference is made up in the TCM.
He thought, maybe, the only difference might be the Torque Converter, but he did not think so and he would need to look it up.
This is one of only a couple of tranny shops in town that will install a junk yard unit.
Most others will not.
Of course, all I am paying for is the labor, tranny flush/new fluid/filter and the shop will not guarantee anything.
Without going into a lot of detail, I trust this shop to do good work.
But...I am slightly concerned.
I've always be taught that Diesel trannys and Gasser trannys are different.
The TC has a lower stall speed and the valve body is programmed with different shift points.
I was told on non electronic units that is true, with the exception of some late model 4L80E that was installed behind 6.5TD, those were slightly different.
My question to the group:
Is there any difference in a Gasser and Diesel 4L80E?
Would a Gasser 4L80E be any harm in my 6.2L powered van, even with a Diesel TCM?