My cousin has just gotten his hands on a 12 bolt posi traction rear end out of a 77 Chevy van. Not sure what gears but he only wants 100 bucks for it. Now, what will it take to work in my 92 RS? And considering Im doing this, would it just be smart to go on and buy the LCA reloacation brakcets and new LCA's, considering Ill have to mod this 12 bolt? Im just wondering before I buy because I need to know what I'll end up spending to drop this in the Camaro or should I just spend the money and just have gears put in the 10-bolt for now? Any help is appreciated, thanks.

 

there's nothing about it you'd want for a f body

 

I dont know ede, it might not be too bad, depending on what way you wanted to go with it. The big thing, is how wide is it, and what kind of gears. If you are going to make a drag car, with a different suspension ( i.e. no torque arm, etc.), it might not be a bad place to start.

 

• Well, you'd have to narrow it. And get axles for it.
  
• You'd have to remember that car 12 bolts are stronger than truck 12 bolts.
  
• You'd have to add a torque arm attachment point.
  
• You'd have to add the brackets for the LCA attachment points
  
• And even if you're "going to make a drag car with a different suspension" of it, then you're fabbing 4 link installation issues.
  
• You'd have to add an attachment point for the panhard rod.
  
• You'd have to figure out brake caliper brackets that fit on the large axle tubes.
  
• You'd have to re-do swaybar brackets that fit on the large axle tubes.
  
• You'd have to combine parts for e-brake functionality.
  
• Even if it were the right width....
  
• You'd have to turn down the axle flange o.d. if you wanted to run discs.
  
• You'd have to redrill the axles for the 4.75" car bolt pattern.
  
• You'd be changing your rear u-joint and / or pinion flange.
  
• But hey, you could re-use the gear lube in it if it wasn't too olde.

Other than that, it'll work fine.

 

Like I said, it would be a lot of work, you would have to decide what to do, but some of the things you mentioned would not have to be done.

 

Name one.

 

Redundancy. If you are going to change the suspension, then you will not have to come up with a torque arm setup. No one said anything about disk brakes, you can change wheels if you really wanted, who gives a crap about u-joints you will have that problem with virtually any swap.

lets see what I wrote:

I dont have one to measure, and I surely dont memorize the dimensions of every rear end out there. Of course, with your intelligence it is easier to argue than read.

 

I covered that

I covered that

I covered that

I covered that

So full size vans are narrower than gm cars now?

Billy says hi.

(let's see if this one gets deleted too)

 

try buying parts for a truck 12 bolt, there isn't any preformance parts for one, besides having to change just about every single aspect of the rear to make it fit a thirdgen f body it's a time consuming waste of money and effort.

 

I don't believe a simple u joint conversion will work either if memory serves the truck 12 bolt is deeper on the pinion so you will have to shorten the driveshaft. ede is right the truck 12 bolt is weak and parts are non existent. Not worth wasting any effort on IMO.

 

Sorry dude, you are babling now. Or did you cover that too?

 

ignoring the facts, and lying about what you posted doesnt make you right. I admitted that I did not know the width of the axle. Actually invited someone in to tell the width. Of course you have to come and be a jerk about it. But lets take a look at your post again.

Show me where I said that. I'll give you a 100 bucks.

Trying to put words in peoples mouths doesnt make you look more intelligent. I would like to point out to everyone in this thread that if you follow JMD around, you will realize he is wrong more than he is right. You will also see that he likes to call people names because of where they are from, even though he is a chicken **** and wont back it up. Proof?? Did you call my toothless tranny guy yet? Or are you just gonna stop in?

Before you try and post another argument with me, go back and look at my original post:



No where did I say, yeah bolt it in. I actually left it at, I dont know how wide it is, what kind of gears it has, or anything about it. But it COULD be a good place to start. Obviously it isnt. So he wont use it, and this thread is pointless. Except to try and give you a hard on so you can screw your pillow.

 

I dont know where your getting a 77 truck rear end is weaker then a car but JMD your mistaken. GM did somthing screwy in the early 80's and the 12 bolts changed, covers wont even interchange, axle tubes are slightly smaller, gears are the same. If it did come out of a 77 then it is stronger then a car 12 bolt.

This rear end would not be my choice for a conversion way too much hassle for a daily driver.

Ede, there are plenty of 12 bolt truck performance parts floating around you just need to know where to look.

 

quick JMD, call him a liar, tell him he doesnt know what he's talking about.

 

The pinion stem diameter for a car 12-bolt is 1.625" and the pinion stem diameter for a truck 12-bolt is 1.438". That's the defining difference. That's why the gearsets don't swap. The ring gear diameter is the same between the two.

 

Correct; the truck one will require driveshaft work. Plenty of guys installing Moser 12 bolts in 3rd and 4th gens are using their stock driveshaft, but that is a car style 12-bolt, not a truck 12-bolt.


I stated Well, you'd have to narrow it. And get axles for it.

You insinuated I didn't know WTF I was talking about off the top of my head. Insinuating is the same as playing devils advocate, which is 95% of making the other side of the argument. Even if you don't say something in black and white, it can be read into.


So your buddy thegeneral posted in the Southwest forum why? Because you both do a little bit of following me around. Why are you following me around? I don't know. You like to hear yourself type? You like to argue until you're blue in the face, and still not be knowledgable about anything?

No, you're the one who called me an ***(hole) in the "truth about manual transmissions thread." I may have called you a lemur though.

My wrong/right ratio: I welcome anyone to search my posts.

I haven't been to IL in quite some time. If I recall correctly, I was there last Thanksgiving or so. It's around 1600 miles to Litchfield from here. I do have more important things to do than "prove myself" to a bench racer.


Why post blanket statements which are only vaguely "tech" and with this being a tech board, don't help anyone or anything but your post count? If you don't know WTF you're talking about in regards to 12 bolts (and you don't,) then just don't bother posting.

Tech. Stick to it.

 

now why is it i get pms from like 5 different people telling me about my name being brought up on a thread i didnt even post on to begin with then when i get here its you again.... i dont follow you around i never have and when you sent me that pm back a couple weeks ago being an azz i replied to it tellin you i dont "follow you around " nor do i care to ......but dont bring me up in your posts again

and im sorry to whom ever started this post i didnt start this post as tech related .........