04 LS1 engines in 98 trans am

[bossho]

looking at an Ls1 from a 2004 GTO and an LS1+4l60E from a 2003/2004 Corvette they both have 25-30k miles on them and I need a new engine for my 98 Trans AM to replace my dead LS1 (oil ran dry) - what kind of compatibility issues am I going to face , are these a relatively easy swap? any details of difference I will have to deal with (ie pay for) are appreciated. Also, if anyone has a 400-500+HP engine for sale that will fit my 98 TA and mount up to my stock 4L60E tranny (automatic) let me know.

Thanks in advance for all your much appreciated feedback.

Sincerely,


Tom Sullivan
Ellenton, FL
34222
941-822-2015

[blackbird0230]

looking at an Ls1 from a 2004 GTO and an LS1+4l60E from a 2003/2004 Corvette they both have 25-30k miles on them and I need a new engine for my 98 Trans AM to replace my dead LS1 (oil ran dry) - what kind of compatibility issues am I going to face , are these a relatively easy swap? any details of difference I will have to deal with (ie pay for) are appreciated. Also, if anyone has a 400-500+HP engine for sale that will fit my 98 TA let me know.

Thanks in advance for all your much appreciated feedback.

Sincerely,


Tom Sullivan
Ellenton, FL
34222
941-822-2015

This is a great question. I'm lookin to buy a new motor so that I can pull the numbers matching motor and put it aside for future value. Let us know!

[cammed goat]

If I remember correctly, a GTO motor will fit with no hassle. I think it will run with your PCM as well. I could be wrong, but others will chime in on this one. You shouldn't have any issues.

[Spaz]

it will work just fine... just got to remember to swap your oil pan on to the gto ls1...

[Spaz]

you can also get a LS6 crate for relativly cheap now days... that is the route i went... i think i paid 3,400 for mine... direct swap in just changed over my oil pan...

[Cutlass]

an LS1+4l60E from a 2003/2004 Corvette

Corvettes have a torque tube between the engine and transmission and the rear diff is bolted to the back of the transmission, so that "Corvette" transmission won't work for you. The engine should though.

[blackbird0230]

you can also get a LS6 crate for relativly cheap now days... that is the route i went... i think i paid 3,400 for mine... direct swap in just changed over my oil pan...

Not bad at all! I'll look into that.

side note: I wish they designed our transmissions like the corvette so we could get some weight off the front......

[buiick]

can someone help me out I bought a motor from a 1998 t/a to replace the one in my 2001 firebird and now it wont fire any of the coils on the passanger side! i do have injector pulse though ? any in put

[Spaz]

can someone help me out I bought a motor from a 1998 t/a to replace the one in my 2001 firebird and now it wont fire any of the coils on the passanger side! i do have injector pulse though ? any in put

are they plugged in to the harness???

[buiick]

yes for sure all is plugged in and power to the low ref. but no signal to fire the coils? is there a difference between the 98 motor to the 2001?

[cammed goat]

I read in GMHTP that if you put a newer motor in an older car, you must use the BCM and key from the donor car. Without those, you will not fire. Your VATS might be activating.

[Cutlass]

cam sensor is different I think
Read this Thread

[cammed goat]

cam sensor is different I think
Read this Thread

Ah. So it's not as complicated as I thought. Good to know.

[PFM]

Just remember that you need to reuse your water temp sensor off your 98 motor. Its got 3 wires oposed to 2 on the later models.