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Old 10-09-2009, 02:04 PM
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1980 chevy truck 5 speed

I am rebuilding the motor in a motor swapped Nissan. I had a friend offer me an alumium cased 5speed out of a 80 v6 chevy swb. I would like a to drop a manual trans in the car as isn't drag raced any more. I am not sure if it can handle the 400tq/380hp that my 350 will be making. If it is the same a T5 out of a camaro than I will stay with my T400.

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Old 10-09-2009, 05:44 PM
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'80 trucks didn't have V6's or 5spds. likely it's a '90 which would be a 4.3 V6 and Getrag 5spd.. weak trans
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Old 10-09-2009, 06:59 PM
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There WERE 5-speeds available in the Chevy/GMC line in 1980 and earlier, BUT were only in trucks BIGGER than 1-ton trucks.

I am thinking more along with what was mentioned earlier, it's likely a later modelT-5 OR NVG-3500, and good for about a warmed over stock engine at most.
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Old 10-09-2009, 07:32 PM
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I do know this was in an 80-81 chevy swb. It had a v6 with with transmission behind it and had some crazy high gears (2.73 or 3.08). It was his grandfathers truck and he would slip the clutch too much to get it to take off so when the time came they swapped in a 350 w/ 4 speed. I was 4-5th grade when I "helped" my friend and his father swap it. We did the v8 swap some time around 92.

I was afraid that it would be a the case with the transmission. Oh well it was worth a try guess I will stick with the slush box for now.
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Old 10-10-2009, 11:28 AM
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If it had a V6 in it, it was NOT stock. I've had more than 35 GM trucks from 1/2 to 1-ton and all were 1975 to 1988, I have nearly every repair manual and even several sales brochures for this series truck, and NONE indicate a V6 available in the these trucks until they changed body styles in 1989.

The ONLY V6 available in GM's light duty truck line before that was the oversized and underpowered GMC V6 engines, run the VIN and you will find out what engine originally came in that truck, it will either be an inline 6 or a V8.

The ONLY V6 engines available in the early 80's trucks were found in S-series trucks starting in 1982 and any transmission behind them will certainly not hold up to a V8 for very long.

Not trying to argue here, just stating facts as found in several sources, as well as my own experience, you would have better luck finding out if the trans would hold up to an engine swap if you told us exactly what engine and transmission you have in there right now.

I even swapped a few Cadillac 500 "big block" engines into a few of this series truck over the years. I still have parts from around 7 different trucks, 2 partial trucks, and 3 complete trucks.
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Old 10-11-2009, 05:17 PM
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I wasn't doubting your info. I was just stating the history of the vehicle as I know it. I will get the numbers off the transmission when I get a chance to make of to his house.
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Old 10-11-2009, 05:58 PM
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81-86 c-10 trucks

833 chrysler overdrive manual trans was available
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Old 10-11-2009, 10:34 PM
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I'd LOVE to get my hands on at least 1 833 transmission from a Chevy truck, they are next to nonexistant in my area, I have all the local junkyards informed that I want one if they ever get one in. Haven't had any contact me in several years, minus the one time they sold it out from under me.

Fast68, the original poster, is talking about a 5-SPEED, not a 4 like the 833.
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