Differential questions?

[Squareforceone]

Hey I'm curious to find out what gearing i have in the back of my truck (1984 c10 w/305) but more specifically if i have a limited slip differential. The reason i
'm curious is because i just changed my gear oil and am wondering if i needed to add the special additive i searched a few times on here and people said to jack up the rear and spin one tire and watch the other one... i did and the other didn't move what so ever i tried both sides and both directions, am i missing something here? Thanks guys

[THE "10" SILVERADO]

Originally Posted by Squareforceone

Hey I'm curious to find out what gearing i have in the back of my truck (1984 c10 w/305) but more specifically if i have a limited slip differential. The reason i
'm curious is because i just changed my gear oil and am wondering if i needed to add the special additive i searched a few times on here and people said to jack up the rear and spin one tire and watch the other one... i did and the other didn't move what so ever i tried both sides and both directions, am i missing something here? Thanks guys

Was it in neutral? If not then the transmission won't let anything budge.

[Squareforceone]

Almost forgot the glove box sticker say rear axle- standard and i think the code is gq1?

[Squareforceone]

Originally Posted by THE "10" SILVERADO

Was it in neutral? If not then the transmission won't let anything budge.

Yes i had the front tires blocked and the truck was on jack stands in neutral

[THE "10" SILVERADO]

Originally Posted by Squareforceone

Yes i had the front tires blocked and the truck was on jack stands in neutral

Ah, just wanted to make sure. I pulled a dumb and tried the same thing without it in neutral once

[Squareforceone]

Lol i've made some pretty done mistakes happens to the best of us haha

[INSIDIOUS '86]

You can go out when it's wet outside and take a right with some gas. If you just spin the inside wheel then you have no posi. If you go sideways and spin out then you prob have a gov loc. which is as good as putting a grenade in your pants with the pin pulled
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[Keith Seymore]

Originally Posted by Squareforceone

Almost forgot the glove box sticker say rear axle- standard and i think the code is gq1?

GQ1 just means the base axle ratio.

G80 is the option for the limited slip/locking (ie, "non open") diff, and it would appear on your glove box sticker if you have it. If it's not on there then your truck was not built with it originally.

K

[Rich84]

If it says g80 and both wheels don't spin then the posi is shot anyway..
I have an 84 with a 305 and it came with 2.56. (t350 tranny)

[Squareforceone]

Originally Posted by Keith Seymore

GQ1 just means the base axle ratio.

G80 is the option for the limited slip/locking (ie, "non open") diff, and it would appear on your glove box sticker if you have it. If it's not on there then your truck was not built with it originally.

K

Thanks Keith just what i was looking for!

[Squareforceone]

I'm not sure that i filled my diff. all the way up with gear oil i used a little over 2 qts which should be good i would assume i didn't really feel gear oil through the fill hole (was my first time doing this so not sure what it should feel like) but it was starting to run out the fill hole so i should be alright correct?

[Rich84]

That's correct.