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What is the stock rear diff gear ratio for 1991 gmc sierra slt short box single cab

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6ya6ya
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Posted on Jan 02, 2017

emissionwiz
  • 75807 Answers

SOURCE: hard shifting

U may have a dirty valve body passage, have u changed the trans fluid and filter in the last 60,000 miles,. if no do and use the new GM Dexron VI trans fluid, it has greatly improved shift characteristic's and has the best detergent property out there to keep the trans clean. I have personnel experience with this fluid in my 96, I was amazed.

Posted on Dec 24, 2008

  • 1 Answer

SOURCE: What are the stock gears in the rear end

it most likley is a 373 rear end

Posted on Feb 20, 2010

emissionwiz
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SOURCE: REMOVAL OF INTERIER DOOR PANEL ON A 2002 GMC SIERRA 1500 EXT CAB SLT

Duplicate question.

Posted on Aug 29, 2012

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1 Answer

1998 gmc whatis the deferance between the 2500 & the 3500 4x4 differentials , can i use a2500 front differential with a 3500 rear end a long the ratiosare th same ?


the front will work, the back you can determine by counting the number of bolts holding the rear diff cover if both are the same you are good to go

Feb 11, 2015 | 1998 GMC Sierra

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1991 4 x4 gmc sierra 1500 rear wheel seized


if both wheels are not turning look into the diff. but if only one tire is seized check for a brake problem.

Nov 03, 2013 | 1991 GMC Sierra

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What years all fit for a rear end on a 2003 gmc sierra 4x4


'99-'03 if it's the standard cab. But you'll need to look in the glove box for the options tag/sheet for the gear ratio because there are three different options: GU4=3:08 ratio, GU6=3:42, and GT4= 3:73. Pray that you don't have the GT4/3:73 because that's the hardest to find around me.

Feb 24, 2010 | 2003 GMC Sierra 1500

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Wher/how do I locate the gear ratio for the rear end of a 1990 chevy sportsside single cab, short box 4 x4?


The gear ratio is stamped by code on the rear diff cover, it's actually on a little piece of metal, has numbers on it.I hope i could help.....

Jan 21, 2010 | 1990 Chevrolet K1500

2 Answers

Want to change gears in rear end for posi traction in a 98 gmc25000 is this possible?


It is possible, you just have to know what gear ratio you have in your Sierra. I had issues with my son's rear differential and did the Salvage Yard and picked one up for $250.00 with less then 45,000 miles. Remember new cars end up at Salvage Yards also.

Here are the Pro code for the rear ends to your Sierra and you can match one up at a Salvage Yard.
GQ1 -- AXLE REAR, STD RATIO
GT4 -- AXLE REAR, 3.73 RATIO
GT5 -- AXLE REAR, 4.10 RATIO
GU4 -- AXLE REAR, 3.08 RATIO
GU5 -- AXLE REAR, 3.23 RATIO
GU6 -- AXLE REAR, 3.42 RATIO
G80 -- AXLE REAR, LIMITED SLIP (POSI TRACTION)

HC4 -- AXLE REAR, 4.56 RATIO

Open Your glove box and look inside it. Should be a list of codes on the bottom.
Example: GU6 G80 According to that, you'll have a 3.42 posi

Good luck and keep me posted and call around Salvage Yards, there prices will differ from one to the next salvage yard and don't ask them for a posi rear end. The cost will you more, just search all the SUV's and look at the pro codes in the glove box. Hunt, most awd system SUV will have the G80 rear end.

Good luck and keep me posted.

Jan 10, 2010 | 1993 GMC Sierra K1500

1 Answer

I have a 1991 gmc 1/2 ton pick up and i need to remove the axle can you tell me how?


remove spider gears in the diff assemble which makes a clip available top remove then axle will slide out

Sep 27, 2009 | 1991 GMC Sierra

1 Answer

Hard shifting


U may have a dirty valve body passage, have u changed the trans fluid and filter in the last 60,000 miles,. if no do and use the new GM Dexron VI trans fluid, it has greatly improved shift characteristic's and has the best detergent property out there to keep the trans clean. I have personnel experience with this fluid in my 96, I was amazed.

Dec 24, 2008 | 1991 GMC K1500

1 Answer

The rear problem with a 1999 gmc sierra truck


do you know if you have a limited slip rear diff?
if you do your grease is worn out or if the fluid was replaced it need to have a friction modifier put in the diff (can be found at any auto part stores.)

if its not a limited slip diff you might have spider gears going bad. then you need to remove the cover on the diff and inspect your spider gears2f73bce.jpg b440737.jpgand these are the spider gears
b87d88d.jpgand this is what a limited slip looks like
good luck
and dont forget to rate my answer
thanks
paul

Nov 15, 2008 | 1999 GMC Sierra

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