I was wondering hoe to tell ( absolutely ) if I have a series 2 or 3 carrier . see this picture...... it was called an Eaton - Gov loc posi unit ( crap ) previous post showing the carrier I have


Anyways .... is there a way to take these guts out and put my posi unit in this carrier ???????? Also here is a casting # 683-2
I have no way to check this casteing # ( GM was lazy )


all help is greatly appreciated
Thanx

 

The gear that's on it looks like about a 3.42 (12 & 41), so if it was actually working assembled like that, it's a 3-series.

No, no way to put one manufacturer's internals into another's externals....

What are you really asking? What other posi do you have?

 

I have the stock posi unit in my camaro .....my delema is .....I can HAVE a set of 3.42 gears ...... but I need a carrier ..... so I see this one in the paper for less than 100 bucks ....... so i buy it ! my delema is ...can i put the stock internals into this ( this is a GM stock part ) carrier that is out of a Blazer or a Jimmy ( supposedly)



Basically I need a series 3 carrier ( I am running a stock 3.08 posi unit .....I assume it's a series 2)...I want a taller gear .......can I use this carrier

 

Judging by the gear that's on it, it's a 3 series. Those look like a 3.42 gear (12 & 41). If you have the thing in front of you, count the teeth; see what ratio it is; odds are, if it came to you as a unit, and hasn't been taken apart, then it ran like that (duh), and if it's a 3-series gear, then it's on a 3-series carrier.

No, you cannot put the F-body internals (made by Auburn Gear) into a carrier made by Eaton. Won't happen.

Either you're stuck with what you've got; or you use the Eaton Grenade-Lok if you want the 3.42 gears.

I'd suggest selling it to a S-10 owner, and buying something better.

One other thing you need to be mindful of, is that your 89 car is in the changeover year from 26 to 28 splines on the axles. You could have either, there's absolutely no way I know of to predict which you have by any method including the VIN. You'll just have to pull an axle and count the splines. Then make sure the carrier you get is the right one to match your axles.

 

I seee ...... think I'll sell it
Dam /....... it looks in Dam good shape too

 

You can measure the location of the ring gear mounting flange to be absolutely sure of what you have. Place the carrier on a flat surface with the ring gear teeth or flange facing up. Now measure from the surface to the bottom of the ring gear or the top of the flange if the ring gear is not mounted. 1 11/16" = 2-series, 1 15/16" = 3 series.

 

Your running a 2 series posi carrier and you want to run a taller gear than the 3.08's. Sell the 3 series gears and buy a set of 2 series 3.42's(or 3.73's) for what you already have.

 

I didn't know there was a series 2 set of gears that were bigger than 3.08. Everyone says that once you pass that point that the carrier needs to be a series 3.

Could you direct me to where I can find these series 2 gears that are in excess of 3.08

Thanx
Dan

 

[QUOTE]Originally posted by D's89IROCZ
[B]I didn't know there was a series 2 set of gears that were bigger than 3.08. Everyone says that once you pass that point that the carrier needs to be a series 3.

sure there are-my 85 iroc has 3:42's from the factory,my 82 and 83 have 3:73's in em!(damn,i sold those cars)

Gary

 

http://www.jegs.com/cgi-bin/ncommerc...61&prmenbr=361
I'm been running 3.73's in a 2 series case for a long time. All they do is make the gear a little bit thicker.

"sure there are-my 85 iroc has 3:42's from the factory,my 82 and 83 have 3:73's in em!(damn,i sold those cars)"
FYI, those are 3 series gears

 

well u got me there.I guess ive never ran across a 2nd series then,ive been swapping center sections in my iroc for a while now.(blew out 3 of em):hail:

 

Get this- you can even mount a 3-series gear on a 2-series carrier with a spacer. I know I've seen them listed in Jeg's or Summit. You may have to call as they may not be listed anymore but still available. I did hear that this approach isn't necessarily reccomended but don't know why. Maybe it's because dealers would rather sell a $180 set of new gears vs a $25 spacer with bolts.

 

I've never liked the idea of a ring gear spacer. Kinda like wheel spacers(adapters are plenty strong though). Maybe it's just me Anyway, a quick search on google got me this site with the spacer listed at 45 dollars.
http://www.moserengineering.com/mose...s.asp?CatID=16
It usually cost around 20 bucks extra to get the 2 series gears(such as 3.42's). So if you're buying gears anyway, might as well get the correct gears for the carrier.

 

I would recommend using a spacer instead of the special gears..... that way, when you finally do break down and get the right carrier, you can still use your gears. The good posi carriers aren't available in 2-series, especially not the good cheap ones (from SLP).

 

Assuming he plans on replacing the posi with something other than a 2 series posi(like the cheap SLP one). It's not a matter of having the 'right' or 'wrong' carrier, they are 2 series and 3 series.

 

Ya .... I have a buddy ..... who says I could buy a spacer kit as well ( but when the guy has blown 3 rearends up, in a 13 sec car ....that tells me he dunno chit about rearends) ......I plan on pushing in excess of 350 horses to the rear wheels ( now ...... does this spacer become an issue ?? ) over the next year .( probably with a little nitrous) Will this be too much for a spacer setup ?