GM 4 speed O/D to 5.3L - The 1947 - Present Chevrolet & GMC Truck Message Board Network

**LEEVON** · 03-29-2010, 04:25 PM

I've been agonizing over my transmission choice but now my incessant Craigslist searching has paid off. It yielded an 80's NP833 truck 4 speed O/D cheap. So long as the seller follows through I'll get it on Wednesday.

The plan is to mate this to a 5.3L for my '50 chevy. I want a manual trans but don't really want to deal with 1) high price 2) hydraulic clutch or 3) 1:1 final drive. This trans should solve all of these problems while being different.

The gearing is close to 700R4 at: 3.09:1, 1.67:1, 1:1, 0.73:1

Now just to figure out how to properly mate it to the 5.3L...

dwcsr · 03-29-2010, 04:35 PM

The cranks are different on 5.3 auto and manual. You may need to get a 5.3 that was manual to make it work or get a flywheel adaptor.

**LEEVON** · 03-29-2010, 04:52 PM

Well after talking with Novak, it should be the same as any other Gen1 4 speed to LSx. Use the old bellhousing, 4.8L flywheel and clutch and a conversion pilot (.400 longer?) bushing from Novak. I'm not sure about the clutch linkage though.

**LEEVON** · 04-08-2010, 12:26 AM

Not sure if anybody is watching this thread, but surely someday somewhere somebody will want to put a GEN I manual transmission behind a GEN III engine. Well, after literally weeks of searching I found this, the holy grail. For about $80 and a trip to O'Reillys I'll be in business:

http://pirate4x4.com/forum/showthrea...1#post11161311

rjs53 · 04-08-2010, 12:54 AM

just happened to be readying an old CHP mag and found someone asking the same question they gave a part# for just your problem it's an ls crank spacer #12563532 this makes up the 0.004 inch on the crank the longer bolts are #12553332 this is a cheap way to do it if you don't want to buy the new flywheel. hope this helps

**LEEVON** · 04-08-2010, 07:16 PM

Quote:

Originally Posted by rjs53

just happened to be readying an old CHP mag and found someone asking the same question they gave a part# for just your problem it's an ls crank spacer #12563532 this makes up the 0.004 inch on the crank the longer bolts are #12553332 this is a cheap way to do it if you don't want to buy the new flywheel. hope this helps

works for GEN 1 automatic trannys, don't think it would for manual though.

RiverRat70 · 01-29-2015, 08:04 AM

I realize this is a old thread but was wondering if you got that trans mated and what you had to do. Im about to do the same swap

solidaxel · 01-31-2015, 12:48 AM

Good info for my next build with a L S

iowaboynca · 01-31-2015, 10:58 AM

If i can't find a nv3500 to stick behind a 5.3, i'm looking to do the same. In my research, i found these articles from carcraft and hottod mags to be very helpful.

http://www.hotrod.com/how-to/transmi...on-swap-gen-3/

&

http://www.hotrod.com/how-to/engine/...s-style-block/

03-29-2010, 04:35 PM	#2
dwcsr Hollister Road Co. Join Date: Apr 2005 Location: Houston Posts: 6,131	Re: GM 4 speed O/D to 5.3L The cranks are different on 5.3 auto and manual. You may need to get a 5.3 that was manual to make it work or get a flywheel adaptor.

03-29-2010, 04:52 PM	#3
LEEVON Moderator Join Date: Jul 2006 Location: Ozark, MO Posts: 4,888	Re: GM 4 speed O/D to 5.3L Well after talking with Novak, it should be the same as any other Gen1 4 speed to LSx. Use the old bellhousing, 4.8L flywheel and clutch and a conversion pilot (.400 longer?) bushing from Novak. I'm not sure about the clutch linkage though. __________________ '20 Silverado Trail Boss ~ '17 Tahoe ~ '79 K15 Sierra Grande ~ '76 Blazer 2wd ~ '71 Cheyenne swb ~ '55 Pontiac Safari ~'50 3100 bagged ~ '80 Wife ~ Late model kids Last edited by LEEVON; 03-29-2010 at 04:53 PM.

04-08-2010, 12:26 AM	#4
LEEVON Moderator Join Date: Jul 2006 Location: Ozark, MO Posts: 4,888	Re: GM 4 speed O/D to 5.3L Not sure if anybody is watching this thread, but surely someday somewhere somebody will want to put a GEN I manual transmission behind a GEN III engine. Well, after literally weeks of searching I found this, the holy grail. For about $80 and a trip to O'Reillys I'll be in business: http://pirate4x4.com/forum/showthrea...1#post11161311 __________________ '20 Silverado Trail Boss ~ '17 Tahoe ~ '79 K15 Sierra Grande ~ '76 Blazer 2wd ~ '71 Cheyenne swb ~ '55 Pontiac Safari ~'50 3100 bagged ~ '80 Wife ~ Late model kids

04-08-2010, 12:54 AM	#5
rjs53 Registered User Join Date: Jan 2010 Location: nevada Posts: 649	Re: GM 4 speed O/D to 5.3L just happened to be readying an old CHP mag and found someone asking the same question they gave a part# for just your problem it's an ls crank spacer #12563532 this makes up the 0.004 inch on the crank the longer bolts are #12553332 this is a cheap way to do it if you don't want to buy the new flywheel. hope this helps __________________ 2003 Dodge 2500 1969 C10 2014 Camaro SS/RS/1LE

01-29-2015, 08:04 AM	#7
RiverRat70 Registered User Join Date: Feb 2013 Location: blountstown fl Posts: 60	Re: GM 4 speed O/D to 5.3L I realize this is a old thread but was wondering if you got that trans mated and what you had to do. Im about to do the same swap

03-29-2010, 04:25 PM	#1
LEEVON Moderator Join Date: Jul 2006 Location: Ozark, MO Posts: 4,888	GM 4 speed O/D to 5.3L I've been agonizing over my transmission choice but now my incessant Craigslist searching has paid off. It yielded an 80's NP833 truck 4 speed O/D cheap. So long as the seller follows through I'll get it on Wednesday. The plan is to mate this to a 5.3L for my '50 chevy. I want a manual trans but don't really want to deal with 1) high price 2) hydraulic clutch or 3) 1:1 final drive. This trans should solve all of these problems while being different. The gearing is close to 700R4 at: 3.09:1, 1.67:1, 1:1, 0.73:1 Now just to figure out how to properly mate it to the 5.3L... __________________ '20 Silverado Trail Boss ~ '17 Tahoe ~ '79 K15 Sierra Grande ~ '76 Blazer 2wd ~ '71 Cheyenne swb ~ '55 Pontiac Safari ~'50 3100 bagged ~ '80 Wife ~ Late model kids

01-31-2015, 12:48 AM	#8
solidaxel Registered User Join Date: Dec 2002 Location: Cactus Patch So. Az Posts: 4,749	Re: GM 4 speed O/D to 5.3L Good info for my next build with a L S __________________ 53 TuTone Extended Cab 350 4-Spd 3:08 (SOLD) 53 Chevy Moldy pearl green ZZ-4 4L60E 9" 3:25 55 GMC 1st Black Mll (ZZ4) ZZ6 TKO 600 5 sp 3:73 62 Solidaxle Corvette Roman Red (327 340hp 4spd 3:36) C4 & C5 suspension tube chassis LS 3 4L70E 65 Corvette Coupe 327 350hp 4spd 4:11 78 Black Silverado SWB (350/350) 5.3 & 4L60E 3:42 2000 S-Type 3.0 (wife cruiser) 2003 GMC SCSB 5.3 4L60E 3:42

01-31-2015, 10:58 AM	#9
iowaboynca Registered User Join Date: Aug 2012 Location: West Side of the valley, CA Posts: 878	Re: GM 4 speed O/D to 5.3L If i can't find a nv3500 to stick behind a 5.3, i'm looking to do the same. In my research, i found these articles from carcraft and hottod mags to be very helpful. http://www.hotrod.com/how-to/transmi...on-swap-gen-3/ & http://www.hotrod.com/how-to/engine/...s-style-block/ __________________ Build: "1950" GMC -Charlotte

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