Is it a posi? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

skokie · 12-15-2003, 06:22 PM

How can you tell if you have a posi diff? Besides a burnout I mean

74bowtie · 12-15-2003, 06:43 PM

You can juck up your truck with a floor jack at the center of the rearend, the pumpkin and get both wheels off the ground. Spin one wheel the other should spin in the same direction.

Porkchop · 12-15-2003, 06:43 PM

jack up the rear and spin one of the wheels. If the other wheel spins in the same direction, it is a posi.
I don't know how you would tell if it is a locker or something else other than by pulling off the differential cover.

*67Fleetsidedream* · 12-15-2003, 06:43 PM

Take the cover off of the rear diff and look at it.

CPNEJR · 12-15-2003, 07:33 PM

If it was me I'd just do a big ole' burnout to find out or not

shuttermutt · 12-15-2003, 08:23 PM

Ask Mrs. Cleo!

dinnut · 12-15-2003, 09:19 PM

jack up the truck. start it put it in gear and floor it. what follows will be simply awesome

*67Fleetsidedream* · 12-15-2003, 09:21 PM

Quote:

Originally posted by dinnut
jack up the truck. start it put it in gear and floor it. what follows will be simply awesome

and extremely dangerous.

74bowtie · 12-15-2003, 09:52 PM

Take the fill plug out and dip in your finger, taste it. A one legger does not have much of a kick to it, but a posi BAM!!! kick it up a notch!! A posi has twice the kick.

Just kidding

skokie · 12-15-2003, 10:03 PM

I will pass on tasting it. As bad as it smelled no thanks. LOL After jacking it up just enugh to get the wheels off of the ground this is what I found. If you turn the right wheel to the left the left wheel turns in the opposite direction.

74bowtie · 12-15-2003, 10:22 PM

Sounds like a 1 legger.

*67Fleetsidedream* · 12-15-2003, 10:25 PM

Yep it is not a posi if the other wheel turn the other direction.

69_hafton · 12-16-2003, 12:57 AM

On some vehicles I've seen that the transmission
needs to be in gear (so that the driveshaft won't turn)
because the differential will cause the same response
from the wheels otherwise. I don't know if this is true
with GM's, but I've witnessed it with limited slip diffs.
on other vehicles.

Best thing is to get ready to change your gear oil, and
pull the cover off.

67cst · 12-16-2003, 01:11 AM

good point 69 halfton...heres hoping anyways cause i jacked up mine and tried it this last summer and they went opposite directions so im gunna have to find out when i get it on the road, lay a patch and pray for 2 strips of rubber

CPNEJR · 12-17-2003, 08:47 AM

I still say just light em' up it's the esiest way

if you don't want to burn the rubber off your tires just go to the junkyard and find some that fit that are bald and your off

12-15-2003, 06:22 PM	#1
skokie Registered User Join Date: Oct 2003 Location: San Jose Ca. Posts: 3,354	Is it a posi? How can you tell if you have a posi diff? Besides a burnout I mean

12-15-2003, 06:43 PM	#2
74bowtie Registered User Join Date: Nov 2003 Location: Central NY Posts: 93	You can juck up your truck with a floor jack at the center of the rearend, the pumpkin and get both wheels off the ground. Spin one wheel the other should spin in the same direction. __________________ 69 Chevelle (Summer only ride, love to drive this) 72 Chevy Shortbox 4x2 (newest addition) 83 Chevy Shortbox 4x2 (project but its clean) 2001 S10 Ext. Cab 4x4 (daily driver)

12-15-2003, 07:33 PM	#5
CPNEJR Registered User Join Date: Sep 2003 Location: Franconia,N.H. Posts: 1,029	If it was me I'd just do a big ole' burnout to find out or not __________________ (Only) Member of the CPNE Fan Club Aint that the truth 67 C-10 350 with 3-speed tranny and 308 gears swb step 82 Z28 Camaro 355 small block over 350 hp and a borg warner super t-10 (blown engine) 72 Chevy K20 Suburban (future project) 70 Chevy K20 now 68 GMC K2500 2003 Chevy 2500hd ccsb 4X4 (daily driver)

12-15-2003, 08:23 PM	#6
shuttermutt Don't say "Oops!", Doctor Join Date: Nov 2003 Location: Houston, TX Posts: 677	Ask Mrs. Cleo! __________________ 'Mutt 1968 CST LWB: R.I.P. 1967 Chevelle: TPI 454 beast 1967 C10 SWB: Claimed when Bumpster didn't put it on his list

12-15-2003, 09:19 PM	#7
dinnut Registered User Join Date: Apr 2003 Location: missouri city, tx Posts: 4,486	jack up the truck. start it put it in gear and floor it. what follows will be simply awesome __________________ 70 longbed 496/th400/Ford 9"

12-15-2003, 06:43 PM	#3
Porkchop Registered User Join Date: May 2002 Location: Dowagiac, MI US Posts: 579	jack up the rear and spin one of the wheels. If the other wheel spins in the same direction, it is a posi. I don't know how you would tell if it is a locker or something else other than by pulling off the differential cover.

12-15-2003, 06:43 PM	#4
67Fleetsidedream Wiseass secured himself a BAN Join Date: Nov 2000 Location: MOON!!! Posts: 2,282	Take the cover off of the rear diff and look at it.

12-15-2003, 09:52 PM	#9
74bowtie Registered User Join Date: Nov 2003 Location: Central NY Posts: 93	Take the fill plug out and dip in your finger, taste it. A one legger does not have much of a kick to it, but a posi BAM!!! kick it up a notch!! A posi has twice the kick. Just kidding __________________ 69 Chevelle (Summer only ride, love to drive this) 72 Chevy Shortbox 4x2 (newest addition) 83 Chevy Shortbox 4x2 (project but its clean) 2001 S10 Ext. Cab 4x4 (daily driver)

12-15-2003, 10:03 PM	#10
skokie Registered User Join Date: Oct 2003 Location: San Jose Ca. Posts: 3,354	I will pass on tasting it. As bad as it smelled no thanks. LOL After jacking it up just enugh to get the wheels off of the ground this is what I found. If you turn the right wheel to the left the left wheel turns in the opposite direction.

12-15-2003, 10:22 PM	#11
74bowtie Registered User Join Date: Nov 2003 Location: Central NY Posts: 93	Sounds like a 1 legger. __________________ 69 Chevelle (Summer only ride, love to drive this) 72 Chevy Shortbox 4x2 (newest addition) 83 Chevy Shortbox 4x2 (project but its clean) 2001 S10 Ext. Cab 4x4 (daily driver)

12-15-2003, 10:25 PM	#12
67Fleetsidedream Wiseass secured himself a BAN Join Date: Nov 2000 Location: MOON!!! Posts: 2,282	Yep it is not a posi if the other wheel turn the other direction.

12-16-2003, 12:57 AM	#13
69_hafton Sleep-Deprived Join Date: Sep 2002 Location: Tulsa, Oklahoma Posts: 445	On some vehicles I've seen that the transmission needs to be in gear (so that the driveshaft won't turn) because the differential will cause the same response from the wheels otherwise. I don't know if this is true with GM's, but I've witnessed it with limited slip diffs. on other vehicles. Best thing is to get ready to change your gear oil, and pull the cover off.

12-16-2003, 01:11 AM	#14
67cst i love summertime Join Date: Jul 2002 Location: Kelowna BC Posts: 4,302	good point 69 halfton...heres hoping anyways cause i jacked up mine and tried it this last summer and they went opposite directions so im gunna have to find out when i get it on the road, lay a patch and pray for 2 strips of rubber __________________ 1967 shortbox stepside Chevy, 365 hp 327, th400. GLOVE BOX LIGHTS FORSALE, click link for info http://67-72chevytrucks.com/vboard/s...d.php?t=273724

12-17-2003, 08:47 AM	#15
CPNEJR Registered User Join Date: Sep 2003 Location: Franconia,N.H. Posts: 1,029	I still say just light em' up it's the esiest way if you don't want to burn the rubber off your tires just go to the junkyard and find some that fit that are bald and your off __________________ (Only) Member of the CPNE Fan Club Aint that the truth 67 C-10 350 with 3-speed tranny and 308 gears swb step 82 Z28 Camaro 355 small block over 350 hp and a borg warner super t-10 (blown engine) 72 Chevy K20 Suburban (future project) 70 Chevy K20 now 68 GMC K2500 2003 Chevy 2500hd ccsb 4X4 (daily driver)



Register or Log In To remove these advertisements.

Register or Log In To remove these advertisements.