switching rears?

[SquareChevy]

Well turns out 86 k10 didn't come with a 12 bolt rear..**** if I ever knew lol.
Story is I ****ed the old g80 carrier up in my rear so I needed a new carrier, went from a locker to open diff..sad...thought I could just go out to the junkyard and find another g80 carrier for 12 bolt..i cant but I sure can find a **** ton of 10 bolts with g80's.

So if my truck has a 700r4 trans to a 205 transfer case(not full time 4wd)
to a 12 bolt rear and I wanted to switch back to a 10 bolt, what would have to change? would the driveshaft have to be shorter or longer? would I have to extend or shorten anything? wheel base still the same?

[hatzie]

Supposedly the 12bolt uses a driveshaft that's 3/4" longer so you may have to shorten yours. The rear universal joints may be different as well. YMMV.

http://67-72chevytrucks.com/vboard/s...d.php?t=158034

[andrewmp6]

If you have a 700r4 you got a np208 the np205 never came factory on that trans.

[Desert1957]

You sure that you have a G80?

I have never seen a squarebody with one factory installed, Didn't come out until years later.

http://www.autoevolution.com/news/a-...ial-94874.html

[SquareChevy]

Originally Posted by Desert1957

You sure that you have a G80?

I have never seen a squarebody with one factory installed, Didn't come out until years later.

http://www.autoevolution.com/news/a-...ial-94874.html

yea 72-87 or 73-87 I forget could come with g80, in my glovebox I have a code that says g80 (auto locker) but my truck came factory with a 10 bolt g80, and the guy I bought it off of must have switched it to 12 bolt with a g80, and since I cant find 12 bolts easily I was thinking about going back to what it originally had.. 10bolt with a g80 carrier

[SquareChevy]

Originally Posted by Desert1957

You sure that you have a G80?

I have never seen a squarebody with one factory installed, Didn't come out until years later.

http://www.autoevolution.com/news/a-...ial-94874.html

https://en.wikipedia.org/wiki/Chevrolet_C/K go to third gen then chassis and powertrain, it will tell u about it

[SquareChevy]

Originally Posted by hatzie

Supposedly the 12bolt uses a driveshaft that's 3/4" longer so you may have to shorten yours. The rear universal joints may be different as well. YMMV.

http://67-72chevytrucks.com/vboard/s...d.php?t=158034

thanks so just a shorter driveshaft and u joints..not bad THANKS for your help!