Fiero GTS (GT Streched) Build thread Fast Back plus Nochie (Page 9/15)
Nebraska MAR 06, 01:00 PM
I can't remember exactly what the clearence was, but I do remember sliding a feeler gauge between the flywheel and adapter and thinking that it is really close.
Nebraska MAR 07, 09:01 PM
Just as I expected, the flywheel is rubbing the adapter plate,



[This message has been edited by Nebraska (edited 03-07-2013).]

Nebraska MAR 07, 09:06 PM
Does anyone know the typical crankshaft endplay and the runout on a typical flywheel ??
Nebraska MAR 07, 09:36 PM
I searched the internet to find the endplay of a northstar engine, and guess what I found here in this forum in Blooze Own: An F355 Six Speed N* Build Thread. This forum has so much information. The spec is .002" to .019" if anyone is interested.
bubbajoexxx MAR 07, 09:36 PM
when i make an adapter plate I always under cut where the flywheel sits to prevent this even ones made for the porsche are cut clean trough as i did with mine on the stretch
Nebraska MAR 09, 07:31 PM
Since I did not document the trans/engine adaptation I guess I have a chance to do it now. It seems like I have to do eveything at least two times to get it right. Here is the modified adapter from Kennedy Engineering and the spacer and redrilled flywheel. I'm going to take Bubbjoes advice and machine clearance into the adapter for the flywheel. I measured the crankshaft enplay and it was .005"which is good, so I think I'll get .1" machined into the adapter just to be safe. Here are some pics before the machining.
Nebraska MAR 16, 08:42 PM
Not to much progress this week, still waiting for my parts from the machine shop. While waiting and since I have the tranny out I decided to make strentghening plate for the tranny. The GT40 guys do this to make the tranny hold up to more HP. I'll post some pics when I get it done.
Nebraska MAR 21, 08:20 PM
I got my parts back from the machine shop and started putting things back together, First was the strengthening plate for the transmission. I made the black plate from 1/4" plate steel and had the machine shop mill off 1/4" from the rear case. The steel plate is suppose to keep the iron casting from breaking out the back. All the force from the pinion gear is against a small area around the rear bearing in the iron casting. The steel plate will help support area. I read that this is the first thing that fails on this tranny. The next thing that fail is the axles. Then if you beef up the axles then the spider gears in the differential fail. My axles are half Audi and half Fiero. They would be easy to replace if they break. I would rather replace an axle than the transmission. Here are some pics of the tranny upgrade.







Done!

[This message has been edited by Nebraska (edited 03-21-2013).]

Nebraska MAR 23, 10:43 AM
I started the reassembly, here is the freshly machined adapter with extra clearance for the flywheel mounted to the engine.
Nebraska MAR 23, 10:50 AM
I had another issue when I removed the flywheel. The bolts were alot looser than I expexted. I forget what I torqued them to, but I think I over stretched them. Here is a pic of one of the bolts I removed compared to a new one. You can notice the deformed threads.