G80 rear end with 180k, would you replace it when regearing?

G80 rear end with 180k, would you replace it when regearing?

Postby albrow100 [OP] » June 25th 2017, 11:54pm

I'm planning to regear my lifted 1997 gmc safari awd with 180K, and I'm debating if the factory g80 can be considered reliable at this point?
or If I should just get a Detroit trutrac or Yukon duragrip and call it good.
van sees mild off road 20% of its use.

Has anyone had a high mileage g80 fail?
I've seen companys who rebuild them and remove the centrifugal system for a spring loaded clutch design, but have found no diy information on this
Original Poster [OP]
albrow100
Firing on 2 Cylinders (L1)
Firing on 2 Cylinders (L1)
Years of Membership: albrow100 has been a member for 4 full yearsalbrow100 has been a member for 4 full yearsalbrow100 has been a member for 4 full yearsalbrow100 has been a member for 4 full years
Posts: 285
Topics: 30
Images: 18
Joined: October 2016
Location: Portland Or
Alias (AKA):
Van Model Year: 1997
Van Make/Model: GMC Safari
Extra Info: awd

  • Similar topics
    Replies
    Views
    Author
  • Found 3.73 G80 at P'n'P
    by Rod's Trucks » May 28th 2020, 6:38am in Rear-End
    1 Replies
    306 Views
    Last post by Mr_Roboto View the latest post
    May 28th 2020, 3:16pm
  • Rear End Noise
    by Vernondo » August 12th 2020, 4:00pm in Rear-End
    4 Replies
    245 Views
    Last post by Vernondo View the latest post
    August 13th 2020, 12:06am
  •  
    5
    87
    Last post by AstroSafari.com View the latest post
    November 25th 2020, 3:14pm

Re: G80 rear end with 180k, would you replace it when regear

Postby Zebediah III » June 26th 2017, 12:22am

If there is nothing wrong with it, replace it ASAP.
Just kidding.
User avatar
Zebediah III
Firing on 5 Cylinders (L1)
Firing on 5 Cylinders (L1)
Years of Membership: Zebediah III has been a member for 10 full yearsZebediah III has been a member for 10 full yearsZebediah III has been a member for 10 full yearsZebediah III has been a member for 10 full yearsZebediah III has been a member for 10 full yearsZebediah III has been a member for 10 full yearsZebediah III has been a member for 10 full yearsZebediah III has been a member for 10 full yearsZebediah III has been a member for 10 full yearsZebediah III has been a member for 10 full years
Posts: 596
Topics: 6
Images: 16
Joined: May 2010
Location: Marathon, Fl
Alias (AKA):
Van Make/Model: GMC Safari
Extra Info: 383 Crate Motor

Re: G80 rear end with 180k, would you replace it when regear

Postby AstroWill » June 27th 2017, 3:40pm

If only mild off-road, and you are gentle with it, I see no reason to replace it.

Trolls take away from productive work, best to ignore them & go about your business.
What has two thumbs and is living in your head rent-free? We hereby claim that it's this guy! Image
User avatar
AstroWill
Technical Director
Technical Director
Firing on 8 Cylinders (L7)
Firing on 8 Cylinders (L7)
Years of Membership: AstroWill has been a member for 11 full yearsAstroWill has been a member for 11 full yearsAstroWill has been a member for 11 full yearsAstroWill has been a member for 11 full yearsAstroWill has been a member for 11 full yearsAstroWill has been a member for 11 full yearsAstroWill has been a member for 11 full yearsAstroWill has been a member for 11 full yearsAstroWill has been a member for 11 full yearsAstroWill has been a member for 11 full yearsAstroWill has been a member for 11 full years
Posts: 11088
Topics: 108
Images: 443
Joined: February 2009
Alias (AKA): Critical Thinking+Common Sense
Van Make/Model: Chevrolet Astro

Re: G80 rear end with 180k, would you replace it when regear

Postby TurnNburn » June 27th 2017, 4:49pm

I would gladly take it off your hands when you put something serious in it. I have been mildly looking for a G80 for a while now. It will be going to a good home.

Why are you regearing? And what are you going from/to ratio wise?
2000 Astro- Camperized, bumpers, lifted, LS 5.3 V8, 4x4 T-case, Truetrac rear locker, 31x10.5x15 BFG KO2's
"Play stupid games, win stupid prizes"
Build thread- https://www.astrosafari.com/viewtopic.php?t=103066"
Image
User avatar
TurnNburn
V8 Swap Achievement
V8 Swap Achievement
Green Status (L4)
Green Status (L4)
Years of Membership: TurnNburn has been a member for 4 full yearsTurnNburn has been a member for 4 full yearsTurnNburn has been a member for 4 full yearsTurnNburn has been a member for 4 full years
Posts: 3033
Topics: 11
Images: 0
Joined: April 2016
Location: Bend, Or
Gender: Male
Alias (AKA): iGoogle
Van Model Year: 2000
Van Make/Model: Chevrolet Astro
Extra Info: 5.3 4x4 Overlander

Re: G80 rear end with 180k, would you replace it when regear

Postby timothy47130 » June 27th 2017, 6:51pm

If you plan on driving it hard and have the money budgeted to spend on a locking diff like a Detroit it will be a lot stronger and more reliable than the old g80 gov lock . The gov lock will gernade pretty quick under hard stupid driving conditions. You also have a point about replacing it because of the mileage. It's probably getting pretty loose and unless you are the original purchaser of the van, you have no idea how it was driven before you or if the rear end was even serviced regularly. Also new Gears aren't all that cheap these days and if that thing goes it will most likely damage the new gears. If it were me and I had the money set aside for it I would replace it.
1998 chevy astro mark III conversion with 125,000 miles

all stock besides-
dual exhaust
rear lifted 1" with s-10 leafs
10,000 lb capacity transmission cooler
corvette 2nd gear servo
Trans-go SK4L60E shift kit

5.7 Vortec swap on the way
timothy47130
Firing on 5 Cylinders (L1)
Firing on 5 Cylinders (L1)
Years of Membership: timothy47130 has been a member for 5 full yearstimothy47130 has been a member for 5 full yearstimothy47130 has been a member for 5 full yearstimothy47130 has been a member for 5 full yearstimothy47130 has been a member for 5 full years
Posts: 593
Topics: 41
Images: 7
Joined: March 2015
Location: southern indiana
Gender: Male
Alias (AKA): Tim
Van Model Year: 1998
Van Make/Model: Chevrolet Astro
Extra Info: mark III conversion

Re: G80 rear end with 180k, would you replace it when regear

Postby albrow100 [OP] » July 5th 2017, 6:45am

I'm regearing from 3.42 to 3.73 mostly because both diffs are making loud bearing noises and I figured why not at the same time
It will put me closer to factory ratios with the 31X10.5X15 I'm running
I've decided to replace it due to the unknown/cost of doing it again if I break it.

Now its a between a tru-trac and yukon duragrip, will decide and order soon



also the g80 will be up for grabs in a month or so hopefully
located in Portland OR
Original Poster [OP]
albrow100
Firing on 2 Cylinders (L1)
Firing on 2 Cylinders (L1)
Years of Membership: albrow100 has been a member for 4 full yearsalbrow100 has been a member for 4 full yearsalbrow100 has been a member for 4 full yearsalbrow100 has been a member for 4 full years
Posts: 285
Topics: 30
Images: 18
Joined: October 2016
Location: Portland Or
Alias (AKA):
Van Model Year: 1997
Van Make/Model: GMC Safari
Extra Info: awd

Re: G80 rear end with 180k, would you replace it when regear

Postby chevymaher » July 5th 2017, 12:53pm

I got the true trac. It is a good differential. It can deal with anything you can dish out.
Image
User avatar
chevymaher
Team Leader
Team Leader
Firing on 8 Cylinders (L7)
Firing on 8 Cylinders (L7)
Years of Membership: chevymaher has been a member for 10 full yearschevymaher has been a member for 10 full yearschevymaher has been a member for 10 full yearschevymaher has been a member for 10 full yearschevymaher has been a member for 10 full yearschevymaher has been a member for 10 full yearschevymaher has been a member for 10 full yearschevymaher has been a member for 10 full yearschevymaher has been a member for 10 full yearschevymaher has been a member for 10 full years
Posts: 14197
Topics: 90
Images: 94
Joined: November 2010
Gender: Male
Alias (AKA): chevymaher
Van Model Year: 1994
Van Make/Model: GMC Safari
Extra Info: SLE RWD Mercruiser


 
  • Related topics
    Replies
    Views
    Last post

Return to Rear-End

It is currently November 25th 2020, 3:14pm

Rear-End Forum
Rear-EndA differential is a device employing gears capable of transmitting torque and rotation through shafts. Essentially the differential allows each of the driving wheels to rotate at different speeds in the rear axle.
To create a new topic in Rear-End, click this button:
Previous topic Next topic
Recent Image Attachments
Attached by:
dit
in Rear-End
Views: 1334
Comments: 24
Date: Aug 28 '20
Time: 9:45pm
» Read last comment
Attached by:
dit
in Rear-End
Views: 1334
Comments: 24
Date: Aug 28 '20
Time: 9:29pm
» Read last comment
Attached by:
dit
in Rear-End
Views: 1334
Comments: 24
Date: Aug 07 '20
Time: 11:00pm
» Read last comment
Attached by:
dit
in Rear-End
Views: 1334
Comments: 24
Date: Aug 07 '20
Time: 4:01am
» Read last comment
Attached by:
dit
in Rear-End
Views: 1334
Comments: 24
Date: Aug 06 '20
Time: 5:14pm
» Read last comment
Sponsors

Who is online

Users browsing this forum: No registered users and 1 guest