what do i have?

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what do i have?

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what do i have? - 3/23/2006 10:23:42 AM

fzr confused

Posts: 26
Joined: 3/21/2006
Status: offline

well i am looking for a spool for my blazer, it is a 91 2dr 4wd with a 4.3 in it. i need to know what rearend i have and also what front i have. do they make a spool for the front? im thinking about welding the front and rear diffs up, but since i see spools are like 85 bucks, i would go that route instead. this truck is a 100% offroad truck only, so spools or being welded it will be fine

Post #: 1

RE: what do i have? - 3/23/2006 2:55:11 PM

4lowlife

Posts: 1562
Joined: 12/29/2005
Status: offline

quote:

Fastest way is through the RPO listing in the glovebox.
Here are some of the ones off of a 2000 list (don't think it changed at all year to year):
GT4 Rear Axle: 3.73 Ratio

GT5 Rear Axle: 4.10 Ratio

GU4 Rear Axle: 3.08 Ratio

GU6 Rear Axle: 3.42 Ratio

G80 Rear Axle: Positraction, Limited Slip

You could also look it up on one of the many RPO code listing sites: Regular Production Option (RPO) Codes

You can probably install a mini spool to save a few bucks. Weld the side/spider gears like you said. Drop in a lunch box locker for the front.

(in reply to fzr confused)

Post #: 2

RE: what do i have? - 3/23/2006 3:09:55 PM

fzr confused

Posts: 26
Joined: 3/21/2006
Status: offline

yeah, you posted that in my other topic, but i was looking for what rearend does it have? like on my ranger i have an 8.8" rearend. im looking for a mini spool but dont know what diff to look for.

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Post #: 3

RE: what do i have? - 3/23/2006 3:21:54 PM

Hanr3

Wheels & Tire Moderator
Posts: 3479
Joined: 5/11/2005
Status: offline

Should be a 7.65" rear axle. Whereever you go to buy the spool, will be able to verify the axle.
Let me know what a spool costs. I want one for my rear axle in the '87.

_____________________________

"Some people spend an entire lifetime wondering if they made a difference.
The Marines don't have that problem."
-President Ronald Reagan

'87 S10-Blazer - SOLD
'93 S10-Blazer 4x4x4 - Sons DD, engine swap is done.
'00 S10-Blazer 4x4x4 - My

(in reply to fzr confused)

Post #: 4

RE: what do i have? - 3/23/2006 3:52:10 PM

4lowlife

Posts: 1562
Joined: 12/29/2005
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Ahhhh. .OK, you didn't specify, inches or gear ratio.

I have a 7.625" (7 & 5/8") rear end, 7.25" up in the front. Not sure if they changed the size over the years.

(in reply to Hanr3)

Post #: 5

RE: what do i have? - 3/23/2006 6:32:00 PM

fzr confused

Posts: 26
Joined: 3/21/2006
Status: offline

sorry for not being more specific from the get go. thanks for the help guys im gunna check around for a spool and what not. if i find a spool that fits a GM 7.25" would it matter if it is in the front or rear? did GM ever put a 7.25 in the rear? the more i think about it, im not gunna do that to the front of this truck, especially not yet....may cause to much problems with the turning....

(in reply to 4lowlife)

Post #: 6

RE: what do i have? - 3/23/2006 6:35:47 PM

fzr confused

Posts: 26
Joined: 3/21/2006
Status: offline

the closest i can find on summit is a GM 7.5"

after more looking, some sites say the 7.5" spool will fit the 7.625" rear. others dont say....anyone know?

< Message edited by fzr confused -- 3/23/2006 6:41:54 PM >

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Post #: 7

RE: what do i have? - 3/23/2006 7:00:28 PM

4lowlife

Posts: 1562
Joined: 12/29/2005
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I think they're the same. I looked up some info on it and here's what I found.
Do you have IFS?

Vehicle Model Year
S-SERIES PICKUP, & BLAZER 79 & UP

(OEM) GM 7.25" FRONT RING & PINIONS
TEETH RATIO

40-13 3.08
41-12 3.42
41-11 3.73
41-10 4.10

GM 7.5" & 7.625" RING & PINIONS (rear)
TEETH RATIO

OE 41-15 2.73
T/L 40-13 3.08
OE 40-13 3.08
OE 42-13 3.23
OE 41-12 3.42
T/L 41-12 3.42

Try here for rear end stuff.
http://www.wayfindersband.com/powertrax.html

(in reply to fzr confused)

Post #: 8

RE: what do i have? - 3/23/2006 7:07:18 PM

fzr confused

Posts: 26
Joined: 3/21/2006
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yeah, i have the torsion bar suspension. i have the no-slip in my 2wd ranger and ABSOLUTELY LOVE it. it is awesome onroad and especially offroad, maybe ppl have thought i was 4wd when im only a 2wheeler, lol. as for that link. i see a powertrax for 99.99, but how do i get more info on it? there isnt a link anywhere, that i see atleast...

(in reply to 4lowlife)

Post #: 9

RE: what do i have? - 3/23/2006 7:53:35 PM

4lowlife

Posts: 1562
Joined: 12/29/2005
Status: offline

Here ya go....

They claim their LockRight is a little noisier than the powertrax. The lockright is about 95.00 cheaper. Whats nice you don't have to mess w/ pinion/ring gear backlash. It's a drop in and play.

(in reply to fzr confused)

Post #: 10

RE: what do i have? - 3/23/2006 8:54:51 PM

fzr confused

Posts: 26
Joined: 3/21/2006
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yeah, i installed my no-slip myself, took less than an hour :)

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Post #: 11

RE: what do i have? - 3/27/2006 1:50:05 PM

Hanr3

Wheels & Tire Moderator
Posts: 3479
Joined: 5/11/2005
Status: offline

Less then a hunred bucks. Not a bad price.
Thanks guys.

GM used three different sized rear axles in the S10's.
7.5"= original size
7.625"= newer size, I don't know the year break
8.5"= ZR2.

Check out the Aussie locker too. I hear they are even better then those two lunchbox lockers.

_____________________________

"Some people spend an entire lifetime wondering if they made a difference.
The Marines don't have that problem."
-President Ronald Reagan

'87 S10-Blazer - SOLD
'93 S10-Blazer 4x4x4 - Sons DD, engine swap is done.
'00 S10-Blazer 4x4x4 - My

(in reply to fzr confused)

Post #: 12