Holly told me to use a lt1 crossmember and a adaptor don’t see how that works,the instructions said to use a hooker crossmember and the adaptor.was hopeing to get a bolt in so I know that the tailshafthouseing is at the right angle , lined up with the rearend .

 

Are you using a 4L60E that was intended for a LS engine?
You did not really specify what you are using for a transmission.

If the answer to my question is YES...
-then use a OEM 1998-2002 Camaro/ Firebird transmission cross-member from a junk-yard or buy a used one.
-After-market new cross-members are also available.

If you are using a 4L60E that was originally intended for a LT engine; then things are a bit more complicated.
Use the original transmission cross-member... but you will have to slot the holes for the mount or buy an adjustable mount.

 

Useing a ls 4l60, have the ls crossmember that doesn’t fit either,that crossmember sits about 3” rear of the bolt holes on the body. Maybe adapt the lt1 member with a plate it’s right on the edge of the mount,anyone know how high or low the tailshafthouseing can sit?(the ls and lt1 crossmembers are different heights)

 

I can not recall a reason why a fitment issue would occur.

You have a LS family engine, and a 4L60E for a LS family engine with an OEM cross-member for a 4l60E for a LS family engine...
Correct?

I used to produce a cross-member that would fit both the SBC/ LT power-train and the LS power-train.
I simply made the cross-member with two mounting pads for the transmission mount.
Shown below:

 

not sure if any difference between the ls1 and lt1 crossmemebers.....fitment wise that is.....you cant just use a ls1 CM in its place?

thats a spiffy 3rd gen CM Vorteciroc

 

He says he has an LS1 transmission cross-member and the fitment was off...

Something is wrong there.

 

Ok got a hooker ls swap crossmember and it fits. Too bad I asked all these parts peaple and they gave me wrong info that included holly also.

 

For anyone who finds this later, the trans cross members are in fact different on the 4th gens from LT to LS, GM changed where they mount up under the car.