01 5.3 incompatible with 03 NV4500

Fixinit

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This is somehow related to the fact that 5.3 engines weren't mated to manual trannies, and Advance Adapters and other places have bell housing adapters that move the large internal slave cylinder outside the bell giving the room needed, which is all well and good except that they require using their custom made flywheel when the flywheel for the 6.0 engine fits just fine. I swapped the NV4500 in place of the old 4L80E. It worked fine but when the engine blew with 50 miles on the 4500, I got the 5.3 from a wrecker. The internal slave is too big, 3 1/2" long. So going to external slave gives the room that's needed in the bell. I'm just wondering if anybody out there has found a bell adapter that I can use my brand new stock flywheel and pressure plate with. Also I don't like knowing that if the flywheel needs replacing I have to go back to AA or whatever company and buy their custom made one.
I did hear that Lakewood Adapters has the bell with external slave that works with stock clutch kit. But haven't been able to confirm that yet as they don't seem to have an online site. One tech guy at AA suggested I buy a smaller internal slave from some company but they don't carry it. Many thanks for any help. Nothing on Youtube that I can find.
 

stutaeng

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Interesting, although I don't know anything about manual transmissions.

A few years ago I built a 6.0 from parts and my crank was from a guy that built and raced LS swapped S10s. Crank was a from a 5.3 and I had to get it balanced to the 6.0, which involved the machine shop installing those heavy weight slugs. Anyways, the crank had a pilot bearing, so it must have been mated to the manual transmission at some point. The guy I bought it from ran a 4L60e, so who knows who installed that?
 

Fixinit

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I don't know anything about automatics but thats good you got that old 6.0 back on the road.
Well I found a place that sells a bell housing with an external slave bracket and cylinder so I can use my standard flywheel and pressure plate. it's just a typical bell same as what I have but with the opening for the fork and bosses for the bracket. I do not know why Advance Adapters insists on using a bell that's got to have their custom made flywheel with it. The standard 6.0 flywheel I bolted up to the 5.3 fits nice and tight but not too tight to the block, 1/4" from the seal cover bolts in the block. And it's only an inch thick. I keep reading that the LS crank is so far back that they need to offset the flywheel out .400', but my problem is there's not enough room in that bell for everything. (internal slave being 3 1/2" long) In fact, this bell Novak has can even be used with a mechanical fork. (non hydraulic) Which is tempting. Maybe some other time I'll put one of those in it. Right now I do have a good master cylinder mounted on the firewall to use. BTW the name of the place is Novak, they're in Utah
so it looks like I found what I need but will let you if theres more to the story
 

Fixinit

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A different guy at AA told me the external won't work on my four wheel truck because there's no room between front driveshaft and bell. He says to use the 6.0 pressure plate and flywheel and it will work. Said PP that came with my 03 tranny and bell is specially shallow. Ill find out when I measure the one I just ordered in
 

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