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Old 12-04-2012, 07:27 PM   #1 (permalink)
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5.3 to nv4500 flywheel question

I'm trying to put together a 03 5.3 and a 93 nv4500 and was wondering what flywheel and clutch i need? I realize i can buy a mcloed flywheel that is .400" thicker but i'm trying to avoid spending $450 on just the flywheel. I tried a 99 4.8 flywheel before i found out chevy made 2 different cranks in 99-00. It would have worked with the oem spacer except i couldn't find long enough bolts to bolt it on. Is a 01-newer flywheel .400" thicker or did they make the pressure plate different to compensate? Thanks for reading and any help would be appreciated.
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Old 12-10-2012, 01:18 AM   #2 (permalink)
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SInce you have an older trans, you will need to use the spacer and a stock 6.0 fly. The bolts are relatively cheap and can be had at the dealer. I can't remember the part number off the top of my head but a Google search using ls1tech.com in the search will get you what you need.
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Old 12-10-2012, 09:42 AM   #3 (permalink)
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Thanks for the response. The only part number i could find with the search suggested was #11569956. This is the shortest bolt i've already tried. They measure 23.5 mm. I've also tried #19257940- 27 mm long and #12563485- 29 mm long. The 99 4.8 flywheel with spacer were 22 mm thick which only leaves roughly 7 mm/ 1/4" of thread into the crank. Unless the stock 6.0 flywheel is alot thinner.
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Old 12-10-2012, 10:48 AM   #4 (permalink)
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i have a 02 silverado with a 4.8, 93 chevy nv4500 w, and duel cases.
i got info from bd turnkey on what they use for there turn key motors to any gm trans. he recomended i use a ram 1550 bullet steel flywheel from summit racing. it has the .4 ofset milled into it. been working great for over a year now
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Old 12-10-2012, 11:15 AM   #5 (permalink)
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I got my stock 6.0 flywheel from oreilly's for $60 i think,

I got this one

Sachs NFW1050 - Flywheel | O'Reilly Auto Parts
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Old 12-10-2012, 01:39 PM   #6 (permalink)
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Quote:
Originally Posted by swampers1226 View Post
i have a 02 silverado with a 4.8, 93 chevy nv4500 w, and duel cases.
i got info from bd turnkey on what they use for there turn key motors to any gm trans. he recomended i use a ram 1550 bullet steel flywheel from summit racing. it has the .4 ofset milled into it. been working great for over a year now
I looked at the ram 1550 but didn't see it mentioned that it was .400" thicker so i figured it only worked with the gen 3 clutches.
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Old 12-10-2012, 01:51 PM   #7 (permalink)
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Originally Posted by blazing rockwells View Post
I got my stock 6.0 flywheel from oreilly's for $60 i think,

I got this one

Sachs NFW1050 - Flywheel | O'Reilly Auto Parts
Did you use a crank spacer then? If so what bolts did you use?
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Old 12-10-2012, 02:58 PM   #8 (permalink)
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From everything i have read about putting a older trans to a 5.3 all you need is a 6.0 flywheel and no spacer, my engine now is a 6.0, i was just showing you how much i got mine for. From what i remember a 5.3 never had a standard trans behind them, so if you got a mormal 5.7 flywheel it wouldnt work cause the crank sits in .400ths in further. The 6.0 flywheel is .400 thicker then the 5.7 flywheel so no spacer required.....from what i was told and have read about the 5.3/older trans
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Old 12-10-2012, 04:25 PM   #9 (permalink)
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From everything i have read about putting a older trans to a 5.3 all you need is a 6.0 flywheel and no spacer, my engine now is a 6.0, i was just showing you how much i got mine for. From what i remember a 5.3 never had a standard trans behind them, so if you got a mormal 5.7 flywheel it wouldnt work cause the crank sits in .400ths in further. The 6.0 flywheel is .400 thicker then the 5.7 flywheel so no spacer required.....from what i was told and have read about the 5.3/older trans
correct. The t56 behind the ls1 has a longer input shaft to make up the difference. The 4500 to my knowledge is the same thru out it's years regardless of engine it came behind. The 5.3 never had a manual, only an auto, so a stock fly from a 6.0 truck should work without a spacer or I'm sure you could conjure something up with an ls1 fly and clutch bastardization...
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Old 12-10-2012, 08:29 PM   #10 (permalink)
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Thanks for the replies. I thought about the 6.0 flywheel but wasn't sure if it compensated for the short crank like it sounds like it does. I even called a salvage yard and asked them to measure one before i ordered it ( the two parts stores i called couldn't get a new one) and they never called back. I'll have to order one from oreilly's and see how the 93 clutch lines up.
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Old 12-10-2012, 08:55 PM   #11 (permalink)
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I can't say for sure if the pressure plate bolts will line up, but if the disc and pressure plate are the Same diameter, you should be able to use a clutch set out of a 2k or newer 6.0 truck with the 4500.
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Old 12-11-2012, 12:05 AM   #12 (permalink)
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Im just going to use the clutch set up off my 355 motor and sm465 trans i had together, the 6.0 flywheel i bought has the same bolts holes as the 11" clutch i have
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Old 12-11-2012, 01:02 AM   #13 (permalink)
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Im just going to use the clutch set up off my 355 motor and sm465 trans i had together, the 6.0 flywheel i bought has the same bolts holes as the 11" clutch i have
Did you get a new clutch disc or is the input of the 4500 the same 10 spline as the 465?
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Old 12-11-2012, 11:48 AM   #14 (permalink)
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The ram 1550 flywheel is designed to take both gen 3 and 4 style clutches. My stock clutch bolts to one pattern and the 93 clutch in it now bolts to the other. And it's bullet steel. It's pretty much designed to handle any setup u throw behind the new ls style motors. And as I said it was recommended by BD turnkey who deals with this shit all day long. Anyways that's the route I went. And I have the same make n year trans ur putting in but with a 4.8

edit:i did however convert my nv 4500 from a small bearing fork clutch to a big bearing bladder clutch with a 05 bellhousing, for simplicity of my biuld.

i did use this flywheel with a stock 93 clutch on my brothers 66 chevy with a 6.0 lq4, sm465 205 on 404 mogs( soon to be 419s). so i can say it works on both old and new style trans.

i wasnt aware a 5.3 had a diffrent offset on the crank. good to know

Last edited by swampers1226; 12-11-2012 at 11:00 PM.
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Old 12-11-2012, 01:29 PM   #15 (permalink)
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Im just going to use the clutch set up off my 355 motor and sm465 trans i had together, the 6.0 flywheel i bought has the same bolts holes as the 11" clutch i have
I know the 93 clutch bolts up to the 99 4.8 flywheel i had, justs uses metric bolts instead of standard.

Quote:
Originally Posted by swampers1226 View Post
The ram 1550 flywheel is designed to take both gen 3 and 4 style clutches. My stock clutch bolts to one pattern and the 93 clutch in it now bolts to the other. And it's bullet steel. It's pretty much designed to handle any setup u throw behind the new ls style motors. And as I said it was recommended by BD turnkey who deals with this shit all day long. Anyways that's the route I went. And I have the same make n year trans ur putting in but with a 4.8

edit:i did however convert my nv 4500 from a small bearing fork clutch to a big bearing bladder clutch with a 05 bellhousing, for simplicity of my biuld.

i did use this flywheel with a stock 93 clutch on my brothers 66 chevy with a 6.0 lq4, sm465 205 on 404 mogs( soon to be 416s). so i can say it works on both old and new style trans.

i wasnt aware a 5.3 had a diffrent offset on the crank. good to know
I did email Bryan from bd turnkey and he said he's never put together a manual but had a list of the parts needed from his customers which listed the Ram flywheel. The Ram 1550 flywheel sounds like alot better option then the AA or Mcloed and probably out of better steel then a china one. But my 5.3 is staying stock so if i can get a stock flywheel for $60 that will work i'm gonna try that first. I called Oreilly's on the 6.0 flywheel listed above but they can no longer get it. So i'll try a few more places i found online to see if they can get one.
From what i've found only the 99-00 gen 3 engines had different length cranks for a manual or auto. 01-up all had the crank .400" shorter then a gen 1 or 2 to my understanding.

Last edited by Mogbuggy; 12-11-2012 at 01:51 PM.
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Old 12-11-2012, 01:55 PM   #16 (permalink)
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From everything i have read about putting a older trans to a 5.3 all you need is a 6.0 flywheel and no spacer, my engine now is a 6.0, i was just showing you how much i got mine for. From what i remember a 5.3 never had a standard trans behind them, so if you got a mormal 5.7 flywheel it wouldnt work cause the crank sits in .400ths in further. The 6.0 flywheel is .400 thicker then the 5.7 flywheel so no spacer required.....from what i was told and have read about the 5.3/older trans
What year is your 6.0? Was it in front of an auto or manual?
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Old 12-11-2012, 02:03 PM   #17 (permalink)
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Originally Posted by Mogbuggy View Post
From what i've found only the 99-00 gen 3 engines had different length cranks for a manual or auto. 01-up all had the crank .400" shorter then a gen 1 or 2 to my understanding.
Correct to a point only the 99-00 LQ4 6.0L (iron headed) and Manual 4.8L were the only ones with the longer cranks.

All the 01-ups had the shorter standard cranks.


Years Liters Casting # Trans Flange Thickness
  • 1999-2000 4.8L 312 V-8 M/T 1.250 thick flange
  • 1999-2000 6.0L 215 V-8 1.250 thick flange
  • 1999-2007 4.8L 482 V-8 A/T .857 flange
  • 2001-2007 4.8L 482 V-8 M/T .857 flange
  • 1999-2007 5.3L 216 V-8 A/T .857 flange
  • 1997-2004 5.7L 216 V-8 .857 flange
  • 2001-2007 6.0L 216 V-8 .857 flange

GM switch to a common crank to reduce cost. Much cheaper to use a crank spacer or flywheel than cast three different style of cranks.
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Old 12-11-2012, 04:58 PM   #18 (permalink)
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what year is your 6.0? Was it in front of an auto or manual?
2002
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Old 12-14-2012, 05:37 PM   #19 (permalink)
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I received my 6.0 flywheel from Rockauto today. They were the only ones to have one in stock. Everything lines up perfect. Although the distance from the friction surface to the tranny mating surface is 3/16ths shorter then the 350 i pulled my nv4500 off of. Not sure how critical this will be for clutch disengagement. I did find a .090" flywheel/flexplate shim which would get it half way closer. My plan is to run a 93 clutch assembly. Anyone think i need to worry about it or just run the way it is?
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Old 12-14-2012, 06:39 PM   #20 (permalink)
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I received my 6.0 flywheel from Rockauto today. They were the only ones to have one in stock. Everything lines up perfect. Although the distance from the friction surface to the tranny mating surface is 3/16ths shorter then the 350 i pulled my nv4500 off of. Not sure how critical this will be for clutch disengagement. I did find a .090" flywheel/flexplate shim which would get it half way closer. My plan is to run a 93 clutch assembly. Anyone think i need to worry about it or just run the way it is?
Is it closer to the block or the trans? If it's closer to the trans, you can shim the throw out bearing. You would find those shims easier than flywheel shims.
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Old 12-15-2012, 05:39 AM   #21 (permalink)
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i did use this flywheel with a stock 93 clutch on my brothers 66 chevy with a 6.0 lq4, sm465 205 on 404 mogs( soon to be 419s). so i can say it works on both old and new style trans.
Im getting ready to try and figure out what parts i need to do this exact setup. 2004 lq4 from a gmc yukon to a sm465/205. Can i just get the ram 1550 flywheel and bolt it to the motor and use an older style clutch? Will i need spacers between the flywheel and crank? Any help is greatly appreciated. This has been weighing on my mind lately.
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Old 12-15-2012, 11:52 AM   #22 (permalink)
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Im getting ready to try and figure out what parts i need to do this exact setup. 2004 lq4 from a gmc yukon to a sm465/205. Can i just get the ram 1550 flywheel and bolt it to the motor and use an older style clutch? Will i need spacers between the flywheel and crank? Any help is greatly appreciated. This has been weighing on my mind lately.
Check this out.

How To Connect a LSx Series V8 to older GM 4 Speed Manual Transmission - YouTube
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Old 12-15-2012, 12:26 PM   #23 (permalink)
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Awesome video!! Very informative
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Old 12-15-2012, 02:10 PM   #24 (permalink)
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That video should be a sticky. Esp around here with everyone putting ls engines in their rigs with older transmissions.
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Old 12-15-2012, 07:13 PM   #25 (permalink)
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The flywheel im going to use
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