Transmission question for A833 - The 1947 - Present Chevrolet & GMC Truck Message Board Network

stelth2002 · 12-17-2003, 01:08 AM

I finally found something that ive been looking for a while. Its an NP A833. Basically a 4 speed manual with over drive. Take the basic 4 speed and subtract the 1st gear and add over drive. These were behind hemis and i do believe it would hold the power im putting out. It was behind a 6.2 diesel in a chevy truck. DOES ANYONE have experience with these. I never use 1st in my truck anymore and will have the power to use overdrive. I have a new clutch in my truck now. If i take the bell and tranny from this donor and move it to my truck. Can i use my old (which is new) clutch. My current tranny is an SM 420. Also what will I have to do as far as tranny mounts? I havent been able too look at it yet and the guy wants 300 for it. I dont know if ill give that, im going to try and trade some stuff. But could use some insight. Thanks

1969 GMC · 12-17-2003, 04:03 PM

no help here, but TTT for ya

Duallie · 12-18-2003, 03:10 AM

From memory:
It was only available in '80-81 or so GM pickups and maybe Darts.
All aluminum.
Modelled on the mopar 4 speed car tranny.
They rearranged gears and turned 3rd into OD and widened 1-2.
I think the input shaft was weak on these.
NOT available with Hemis.
Don't know about bells and mounts.
Good up to a non-rowdy 350, 305 would be safer.

stelth2002 · 12-18-2003, 03:17 AM

Well thats not what ive found. This tranny is in a 84 chevy with a 6.2 diesel. So it will handle the torque. This is also a cast iron case tranny. Which would make it even stronger. It is also a 4 speed, 3rd gear being direct. and 4th overdrive. And I know people that go them behind a 440hp big block from the factory. Or was i told wrong on this. Read down on this page also, it states it was avail in the hemi cuda. Im just wanting to know if anyones had experince with there

BobS · 12-20-2003, 04:24 PM

Good info on the NP A-833.

http://www.autohobbydigest.com/a-4spd.html

Bob

12-17-2003, 01:08 AM	#1
stelth2002 Young Gun wth Fast Inline Join Date: Jan 2002 Location: Idaho Posts: 1,475	Transmission question for A833 I finally found something that ive been looking for a while. Its an NP A833. Basically a 4 speed manual with over drive. Take the basic 4 speed and subtract the 1st gear and add over drive. These were behind hemis and i do believe it would hold the power im putting out. It was behind a 6.2 diesel in a chevy truck. DOES ANYONE have experience with these. I never use 1st in my truck anymore and will have the power to use overdrive. I have a new clutch in my truck now. If i take the bell and tranny from this donor and move it to my truck. Can i use my old (which is new) clutch. My current tranny is an SM 420. Also what will I have to do as far as tranny mounts? I havent been able too look at it yet and the guy wants 300 for it. I dont know if ill give that, im going to try and trade some stuff. But could use some insight. Thanks __________________ 1967 Chevrolet LWB with built 292! 415 ft. lbs of torque, 4 speed :O with 27% overdrive too, 3.73 Posi. Frame and body done... getting painted!!!

12-17-2003, 04:03 PM	#2
1969 GMC Registered User Join Date: Feb 2003 Location: The Rubber City Posts: 5,498	no help here, but TTT for ya __________________ 1969 GMC K2500 1996 Honda Accord 2007 Kawasaki KLR 650

12-18-2003, 03:10 AM	#3
Duallie Registered User Join Date: Feb 2001 Location: Nikiski, Alaska Posts: 477	From memory: It was only available in '80-81 or so GM pickups and maybe Darts. All aluminum. Modelled on the mopar 4 speed car tranny. They rearranged gears and turned 3rd into OD and widened 1-2. I think the input shaft was weak on these. NOT available with Hemis. Don't know about bells and mounts. Good up to a non-rowdy 350, 305 would be safer. __________________ Just as if I knew what I was doin'

12-18-2003, 03:17 AM	#4
stelth2002 Young Gun wth Fast Inline Join Date: Jan 2002 Location: Idaho Posts: 1,475	Well thats not what ive found. This tranny is in a 84 chevy with a 6.2 diesel. So it will handle the torque. This is also a cast iron case tranny. Which would make it even stronger. It is also a 4 speed, 3rd gear being direct. and 4th overdrive. And I know people that go them behind a 440hp big block from the factory. Or was i told wrong on this. Read down on this page also, it states it was avail in the hemi cuda. Im just wanting to know if anyones had experince with there __________________ 1967 Chevrolet LWB with built 292! 415 ft. lbs of torque, 4 speed :O with 27% overdrive too, 3.73 Posi. Frame and body done... getting painted!!!

12-20-2003, 04:24 PM	#5
BobS Senior Member Join Date: May 2001 Location: West Central Minnesota Posts: 568	Good info on the NP A-833. http://www.autohobbydigest.com/a-4spd.html Bob __________________ V-6....only GMC Trucks have it! 62 GMC W5000 NAPCO-V6 65 GMC 2500 NAPCO Panel-V6 66 GMC 1000-V6 66 GMC 1500-V6 67 GMC K1500-SBC (originally a KM-V6) 68 GMC C1500-V6 68 GMC C1500-V6 68 GMC Suburban C2500 70 Chevy K20-SBC 71 Chevy C30 Longhorn-SBC 72 GMC Suburban C1500-BBC 72 Chevy C10-SBC 72 GMC C5500-ToroFlow Diesel

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