DocWinter
Full Member
2007.5 Chevy Avalanche 5.3 4wd 160k miles, SPI says G80 Diff.
The problems started about a week and a half ago when I noticed that when I started my truck and pulled out of my parking spot ( a good sharp 90-degree turn ) my rear diff would act as if they were locked and kind of skirt or chirp my wheels and after either straightening out or continuing to turn there would be a noticeable pop or bang. Well, it didn't take long for that issue to worry my and I read online that bad gear oil can sometimes cause it to lock up.
So that day I went out, bought a gasket, gasket sealant, a pump, 3.QT's of gear oil and some lock stop/diff additive and replaced the oil. No smoking guns really. Oil looked as you would expect from a 160k miles truck, no metal shavings stuck to the magnet. ( side note: remove, and replace the fill plug BEFORE removal, it was ON THERE TIGHT) It took about 2.1 QT of gear oil before it started to come out of the fill hole. I take it for a spin real quick to see if there are instant results and from what I can tell it improved.
Used Lucas Gear Oil 75w-90 and a Bottle of differential additive
Well, a few days have gone by and I honestly, don't see an improvement. its still doing it and maybe its just me but my truck feels kind of slugish too.
As usual, any and all advice is wanted. thank you in advance.
EDIT: Thank you for all the advice. My diff exploded the next day, currently being replaced
The problems started about a week and a half ago when I noticed that when I started my truck and pulled out of my parking spot ( a good sharp 90-degree turn ) my rear diff would act as if they were locked and kind of skirt or chirp my wheels and after either straightening out or continuing to turn there would be a noticeable pop or bang. Well, it didn't take long for that issue to worry my and I read online that bad gear oil can sometimes cause it to lock up.
So that day I went out, bought a gasket, gasket sealant, a pump, 3.QT's of gear oil and some lock stop/diff additive and replaced the oil. No smoking guns really. Oil looked as you would expect from a 160k miles truck, no metal shavings stuck to the magnet. ( side note: remove, and replace the fill plug BEFORE removal, it was ON THERE TIGHT) It took about 2.1 QT of gear oil before it started to come out of the fill hole. I take it for a spin real quick to see if there are instant results and from what I can tell it improved.
Used Lucas Gear Oil 75w-90 and a Bottle of differential additive
Well, a few days have gone by and I honestly, don't see an improvement. its still doing it and maybe its just me but my truck feels kind of slugish too.
As usual, any and all advice is wanted. thank you in advance.
EDIT: Thank you for all the advice. My diff exploded the next day, currently being replaced