Differential questions? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Squareforceone · 03-21-2012, 10:33 PM

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 · 03-21-2012, 10:36 PM

Quote:

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 · 03-21-2012, 10:38 PM

Quote:

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 · 03-21-2012, 10:49 PM

Quote:

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 · 03-21-2012, 10:37 PM

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

Keith Seymore · 03-22-2012, 06:43 AM

Quote:

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

Squareforceone · 03-22-2012, 11:17 AM

Quote:

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 · 03-21-2012, 10:53 PM

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

INSIDIOUS '86 · 03-22-2012, 01:59 AM

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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Rich84 · 03-22-2012, 08:32 AM

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 · 03-22-2012, 01:30 PM

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 · 03-22-2012, 03:36 PM

That's correct.

03-21-2012, 10:33 PM	#1
Squareforceone Registered User Join Date: Nov 2010 Location: Rustville USA or southeast Ia Posts: 654	Differential questions? 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 __________________ Rust is better than rice.

03-21-2012, 10:37 PM	#5
Squareforceone Registered User Join Date: Nov 2010 Location: Rustville USA or southeast Ia Posts: 654	Re: Differential questions? Almost forgot the glove box sticker say rear axle- standard and i think the code is gq1? __________________ Rust is better than rice.

03-21-2012, 10:53 PM	#8
Squareforceone Registered User Join Date: Nov 2010 Location: Rustville USA or southeast Ia Posts: 654	Re: Differential questions? Lol i've made some pretty done mistakes happens to the best of us haha __________________ Rust is better than rice.

03-22-2012, 01:59 AM	#9
INSIDIOUS '86 Registered User Join Date: Jul 2009 Location: washington Posts: 4,178	Re: Differential questions? 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 Posted via Mobile Device __________________ 377 sbc thumpr cam autogear m23 muncie 3:73 Detroit trutrac 3''spintech prostreet mufflers xpipe 1 3/4 headers build thread !http://67-72chevytrucks.com/vboard/s...d.php?t=577217 Iroc gauge threadhttp://67-72chevytrucks.com/vboard/s...d.php?t=554511

03-22-2012, 08:32 AM	#10
Rich84 Registered User Join Date: Mar 2012 Location: Woodbury, Ct. Posts: 1,692	Re: Differential questions? 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)

03-22-2012, 01:30 PM	#11
Squareforceone Registered User Join Date: Nov 2010 Location: Rustville USA or southeast Ia Posts: 654	Re: Differential questions? 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? __________________ Rust is better than rice.

03-22-2012, 03:36 PM	#12
Rich84 Registered User Join Date: Mar 2012 Location: Woodbury, Ct. Posts: 1,692	Re: Differential questions? That's correct.



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