Fiero GXP Swap!
NOOBS always bringing up old threads 
,its better if you use a search or read the yellow stickys at the top of the LS4 performance page 
Not being a Dick or anything haha
,its better if you use a search or read the yellow stickys at the top of the LS4 performance page Not being a Dick or anything haha Last edited by 1CL3ANSUP3RSPORT; Sep 17, 2011 at 09:32 PM.
Teching In
Joined: Aug 2010
Posts: 15
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I have the murcielago body on my 87fiero with car tunings ls4 turbo kit. So far I broke a stock input shaft and replaced the input shaft with a 300m shaft and a 7/8" chain. It looks as though I've broken the 300m shaft with less than 10 miles on it. We will have to pull the tranny again to see what broke. This car with wide street tires and a 11" stretch gets good traction, so it's stressing the tranny pretty good. For what it's worth, I've never driven a car that even remotely compares to this one.
Teching In
Joined: Aug 2010
Posts: 15
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I got the shaft from Dave at tep. I haven't talked to Kevin yet but Joe said that he thinks it might have been a bad batch of shafts. Yours sure lasted a lot longer than mine. Maybe because I am rear wheel drive with better traction and weight transfer, which could stress things more. I sure would like to put the pedal down without worrying. I think that the 4t65 has the most potential for handling the power we're putting down. My ls4 is bone stock except for the turbo. I'm not using dod although I still have the dod cam and lifters.
Teching In
Joined: Aug 2010
Posts: 15
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I don't have the transmission apart yet. I'm pretty sure that it's the intense shaft that has sheared though. I'm about to order a GM racing aermet 100 shaft that will allow tcc control. If you're interested, I'll find out if there is more than one available. I might have to machine the pump shaft to make this input shaft work. Once we get that part done, we'll see what stress does to the rest of the drivetrain. I do have bigger axles and bearings. I'm sure that my car being rear wheel drive will stress the drivetrain more under weight transfer more than yours. I don't break the tires loose at all, even loading then torque convertor to 3000 rpm at launch.
I don't have the transmission apart yet. I'm pretty sure that it's the intense shaft that has sheared though. I'm about to order a GM racing aermet 100 shaft that will allow tcc control. If you're interested, I'll find out if there is more than one available. I might have to machine the pump shaft to make this input shaft work. Once we get that part done, we'll see what stress does to the rest of the drivetrain. I do have bigger axles and bearings. I'm sure that my car being rear wheel drive will stress the drivetrain more under weight transfer more than yours. I don't break the tires loose at all, even loading then torque convertor to 3000 rpm at launch.
Teching In
Joined: Aug 2010
Posts: 15
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Let me know on the shaft, you can PM me. I looked into getting one of the GM racing units, but no one has any of the particular metal they are made of due to the government buying it all up. That's what I heard from John at Intense when I spoke to him around a week ago. So no-one has been able to make any. John did confirm they had a bad batch of shafts around a year or so ago. There was a GM 4t65e racing trans up for auction on ebay last week. It was used and they were asking $2600 for it. Might have been worth it for parts alone.
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