GNXClone

iTrader: (7)

I have a 2000 Silverado with a 4L60e that's about to go out. The pan was full of large steel metal flakes, enough to clog the filter. I cleaned out the pan, replaced the filter and fluid. It's still running but not for long.

I picked up a used trans from a craigslist ad out of a 1998 Tahoe. I thought at the time if it had a separate bell housing, it was for the new style engines like my 5.3L. Turns out this is from a Gen-1 5.7L. I found that I can use GM part 12621399 to adapt this trans to the 5.3L engine, so bolting it in is not a problem now.

However, I was told by a guy at Chevy that the electronics are different. Is that true? Everything I've read in the forums and elsewhere claim it's the same as the 2000 4L60e, except for the bell housing, converter and input shaft.

If I use the adapter kit to install this trans, will it run correctly with the Silverado's transmission controller?

Thanks,
-Mike

GNXClone

iTrader: (7)

For what it's worth, the code on the 98 trans is 8CHD. Not sure what the code is on mine, but it's whatever they put behind the 5.3L in 2000 in a Silverado.

Camaroz

iTrader: (2)

Can't really help I've been told the same thing. You need a different flexplate and spacer i think?

TurbopigB4C

iTrader: (5)

If you have the same electrical plugs the electronics should be the same. The main differences for the 4l60e is the valve body design I believe that after 95 and before 04 they all should have the same.

GNXClone

iTrader: (7)

I found the answer to this by looking up the replacement electronics kit for 4L60e. One kit covers 1996 through 2002, so I think I'm okay using a 1998 in a 2000.