Somebody Tell me I am right...

[BlazerWheels]

PLEASE!!!! I opened up my rear diff today (change gear oil) and I think I may have 4.10's instead of the 3.08 that I thought (from looking in glove box).

Anyway, I know you are supposed to divide 2 numbers that are stamped on the ring, but I am not sure of which 2...here are the numbers as they read directly off of the ring...

2 GM 3(could be a 5)988515 10 41 1 83(or 5)

I think the ones in red are the two that I divide...and if so that means I have 4.10's

 

[beater_k20]

you would be correct.

 

[Stomper]

yep

 

[k20]

if i were you, I would check that the front ratio matches.

 

[R72K5]

83(or 5) is your year stamping

what axle model ? what year and model of truck ?

im assuming 10 bolt,

so 4.10 is really interesting..

 

[85mudblazin]

I would just count the teeth to be %100 sure, divide the ring gear by the pinion gear.

 

[tRustyK5]

those would be 4.10's...no question.

Rene

 

[beater74]

I would just count the teeth to be %100 sure, divide the ring gear by the pinion gear.

how do you count the teeth on pinion gear with the ring gear installed?

 

[ntsqd]

Clean off the end of one of the teeth and put a blotch of paint or some other mark on it. The slowly spin the pinion gear while counting teeth. It may help to stick a piece of wire in there to act as a pointer.
MArk the ring gear teeth the same way.

 

[beater_k20]

how do you count the teeth on pinion gear with the ring gear installed?

1-2-3-4-5-6-7-8-9 and so on...

 

[BlazerWheels]

Year is '85 K5. Axles have not been swapped (I think) bought it from my uncle who is VERY anal retentive. So I know HE did not swap them....

Yes 10 bolts...

Reason I thought that I had 3.08's (until I pulled cover) was the code in the glove box. Actually says 3.08 rear axle ratio on sticker...then I pull the cover and HELLO...

It also says it has a traction locker (I forgot exact words) maybe you can ID this for me...
http://www.norcalbigdawgs.net/phpBB2/viewtopic.php?t=5993

 

[tRustyK5]

Looks like not a Gov lock. Limited slip of some sort I guess.

You definitely have a less common diff if it truly is as stock as you say.

Rene

 

[big jimmy 91]

UH OH , looks like a gov lock

 

[BlazerWheels]

The code on the sticker in glove box says "1G80 - Locking Differential"

Would that mean Gov Lock or Limited Slip? Also there is a tag on diff that says Limited Something ....

Here are some other pics...

http://www.norcalbigdawgs.net/Gallery/albuo09/LS_1

http://www.norcalbigdawgs.net/Gallery/albuo09/LS2

Just trying to figure out what I have....

Thanks

 

[Muddytazz]

All the gov-loc's i've ever seen have never had that big "I" chunk of steel in the center of the spider gears.

 

[BlazerWheels]

All the gov-loc's i've ever seen have never had that big "I" chunk of steel in the center of the spider gears.

ANy ideas then??

 

[Muddytazz]

Have you tried looking on ebay for pics of what people have listed for sale to maybe figure it out?

 

[BlazerWheels]

Have you tried looking on ebay for pics of what people have listed for sale to maybe figure it out?

Nope...maybe I'll give that a try tomorrow...

 

[az-k5]

That thick ass ring gear is also a dead give away of other than 3.08 gears. With a stock GM stamp on it that is an awsome find. I would still check the front just to be safe.

 

[big jimmy 91]

It's the same as mine , a gov lock , grenade locker

There are some crappy pics of mine in my web shots under "whats this" ,and everyone here id. it as one