Rear Axles?

I want to change the rear gear in my 95 Caprice wagon. How do you find out if you have 28 or 30 spline axles?
One of the guys in my club has a 3:08 gear and auburn posi from his Impala SS. Just hoping that I can buy these parts and have them put in.
The wagon has a 2:56 open rear end.. I may go to a 3:42 if I can find a reluctor..

2:56 rear is a 7.5" ring gear and 3:42's are an 8.5. You'd need a new carrier, driveshaft, reluctor

Cadet57 wrote:

2:56 rear is a 7.5" ring gear and 3:42's are an 8.5. You'd need a new carrier, driveshaft, reluctor

new driveshaft???!!

benn wrote:

Cadet57 wrote:

2:56 rear is a 7.5" ring gear and 3:42's are an 8.5. You'd need a new carrier, driveshaft, reluctor

new driveshaft???!!

The 7.5" driveshaft is longer because the pumpkin is smaller.

uhhhhh.... i think you might be misinformed

Quite sure I'm not.

http://www.impalassforum.com/vBulletin/showthread.php?t=231194

wagons have 8.5

Wagons with a 2:56 have a 7.5

all of the wagons haven't 8.5 inch rear no matterthe gear ratio.

now the carrier itself is a different series. the 256 gears go on a 4 series. the lower gear ratios like 373 342 308 etc. all go on a 3 series carrier

Cadet57 wrote:

Wagons with a 2:56 have a 7.5

lol, where did you "learn" that one?

BigBlackBeaSSt wrote:

all of the wagons haven't 8.5 inch rear no matterthe gear ratio.

now the carrier itself is a different series. the 256 gears go on a 4 series. the lower gear ratios like 373 342 308 etc. all go on a 3 series carrier

Went and checked my FSM when I got home. You're right. I was quoting the sedan info. Benn, please accept my apologies.

jayoldschool wrote:

Cadet57 wrote:

Wagons with a 2:56 have a 7.5

lol, where did you "learn" that one?

Yeah, you can go ahead and climb off your horse. No reason for your laughter and smarmy quotations. I can at least admit when I'm wrong.

You're the one that posted a link and said "Quite sure I'm not"...

Quote :

No reason for your laughter and smarmy quotations. I can at least admit when I'm wrong

Are you insinuating that I am wrong about something, and can't admit it? Feel free to provide examples.

no worries cadet. i wasn't 100% sure either. read my sig. im just relieved i wont have to find a longer drive shaft!

jayoldschool wrote:

You're the one that posted a link and said "Quite sure I'm not"...

Thanks for the reminder. I'll be sure to ask you if I need a follow up to anything else I've ever posted. I was correct about the sedans with 7.5's. And incorrect regarding wagons. I confirmed my mistake but you come in here laughing and sarcastically asking where I learned something. I guess people can't make mistakes here.

jayoldschool wrote:

Are you insinuating that I am wrong about something, and can't admit it? Feel free to provide examples.

I can provide examples of you being rude, would that work? **** dude. You always like this when people make mistakes? I realized I was wrong, apologized and moved on. The hell else do you want?

Quote :

The hell else do you want?

For someone to share a laugh, move on, and not act like a little kid on the school yard when someone won't pass him the ball.

You're not going to quit the forum this time? I guess you are growing up.

Speaking of growing up, still going with the juvenile comment I see. I'll try to get down to your level the next time you post so you won't have to lash out too much when someone makes a mistake.

HERD_546 wrote:

I want to change the rear gear in my 95 Caprice wagon. How do you find out if you have 28 or 30 spline axles?
One of the guys in my club has a 3:08 gear and auburn posi from his Impala SS. Just hoping that I can buy these parts and have them put in.
The wagon has a 2:56 open rear end.. I may go to a 3:42 if I can find a reluctor..

If my memory serves me correct they are 30 spline. But if you cannot verify I can count them on a axle I have in the garage. Oh and 3.73:1 are the best option I found. Bob Shirley on the Impala forum is still building reluctors.

Yawn.

Also keep in mind wagon axles are 31 13/16" long. Don't know how long SS axles are but they're somewhere in the 30'' range. Not sure if you're even swapping axles but if you are there's that.

Why would he need to keep that in mind?

Yawn.

Did I do that right?

You still didn't answer the question.

The wagons have 30 spline. The Impala SS has 30 also. The Caprice 9C1 has 30 also.
The wagons have the longest axles. I have a wagon and I replaced the axles. I ordered them from Moser.

*snicker*

high school teachers really are juvenile.

OP said a 95,.....91-96 b body were all 8.5,.
I grabbed this off the net,

Quote :

GM PART # 26038684
GM LIST: $328.83
DEALER COST: $194.93
DESCRIPTION: SHAFT,R/A - Caprice 9C1 w/rear disc (8.5/30 narrow)

GM PART # 26018080
GM LIST: $249.19
DEALER COST: $147.72
DESCRIPTION: SHAFT,R/A - Caprice sedan, Buick Roadmaster sedan w/rear drum (8.5/30 narrow)

GM PART # 26043164
GM LIST: $353.88
DEALER COST: $209.78
DESCRIPTION: SHAFT,R/A - Impala SS - rear disc (8.5/30 wide)
NOTE can be used in place of 26033203 on B4U Caprice applications (26033203 discontinued)



The overall width between the "narrow" and the "wide" housings is approximately 1.25". So a narrow axle shaft is 30.5" and a wide is 31.125 approximately. The drum brake cars are a direct swap for the rear disc setup as well if you find a narrow rearend to steal. All 91-96 B bodies used the 5X5" bolt pattern as well. Older square bodies( 1977-1990) are 5X4.75" bolt pattern unless they are a station wagon or a 9C1 package car and then they are 5X5". Furthermore the old 77-90 Caprices had 7.5" 10 bolts if they were not a wagon or a cop car. So.... all the 5X4.75" cars have a garbage rear diff.


Caprice w/Disc Brakes 91-96, Cadillac RWD 91-92, Buick 91-96 Also includes 91-92 Caprice with drum brakes and some 93-96 (ie. taxi) with drum brakes (does NOT include 93-96 B4U Caprice which uses wide housing)

Those use the narrow rear end housing, and "narrow" axle.

The factory gear ratio in an LT1 powered 94-96 Impala SS or 9C1 is 3.08, or RPO GU4. The L99 ( 4.3) powered 9C1's have 3.23 gears ( RPO GU5). The LT1 powered Caprice's otherwise from 94-96 ran 2.93's. Buicks and Caddies I don't know all of for sure. The TBI powered 9C1's ran 3.42's.

jayoldschool wrote:

For someone to share a laugh, move on, and not act like a little kid on the school yard when someone won't pass him the ball.

You're not going to quit the forum this time? I guess you are growing up.

Jeez jay,. u really are an hassol, i passed some friggin corona thru my nose when i read this,.
had to put my shirt in the laundry,...

nick

I figured someone had to take over for you when you were out on the road