where does it say that gm recommends changing the fluid after 1500 miles? i just turned about 2300 on mine and i guess if helps, i probably need it done.
Changed my Differential Fluid today.
I dont have the pics uploaded yet however I changed my Differential fluid today on a buddies lift since GM says to do so in the service manual @ 1500 miles and WOW boy am I glad I did.
of course it is supposed to look milky grey after use of the rearend heating up breaking down the fluid. The Drain plug is a magnet on these cars I had not a lot but I guess a normal amount of shavings stuck to the drain plug.
I put my finger's inside of the fluid after it came out and it felt a litttle gritty.
I did this at a friends gear and axle shop so I had someone around to tell me if thats good or not he told me it was normal and will be good to get that trash out of the rearend :thumbsup:
I put NEW fluid in the rearend along with the GM additive that GM calls for to be installed with the fluid and she now runs much smoother.
Belevie it or not it does run smoother and you can feel it.
Total cost of this cost me about $26 thats for 1 quart of fluid and the addative. it actually takes 1.1 quarts but after the 1 quart of fluid the addative makes it 1.1 :thumbsup:
This is a simple task you could do in your driveway with simple house hold tools , jack and jackstands :thumbsup:
just 2 bolts ( drain plug and Fill plug ) I would recommend getting a piece of vaccum hose to stick over the nipple on the fluid bottle so you can reach over the exhaust and squirt it inside the rearend :thumbsup:
Also get some cardboard and stick infront of your exhaust pipe because when it comes out it will hit the pipe directly if that cardboard isnt there.
this task is so easy even Shunt could jump out of the trunk and do it :thumbsup: :lol:
took me 15 minutes tops :thumbsup:
of course it is supposed to look milky grey after use of the rearend heating up breaking down the fluid. The Drain plug is a magnet on these cars I had not a lot but I guess a normal amount of shavings stuck to the drain plug.
I put my finger's inside of the fluid after it came out and it felt a litttle gritty.
I did this at a friends gear and axle shop so I had someone around to tell me if thats good or not he told me it was normal and will be good to get that trash out of the rearend :thumbsup:
I put NEW fluid in the rearend along with the GM additive that GM calls for to be installed with the fluid and she now runs much smoother.
Belevie it or not it does run smoother and you can feel it.
Total cost of this cost me about $26 thats for 1 quart of fluid and the addative. it actually takes 1.1 quarts but after the 1 quart of fluid the addative makes it 1.1 :thumbsup:
This is a simple task you could do in your driveway with simple house hold tools , jack and jackstands :thumbsup:
just 2 bolts ( drain plug and Fill plug ) I would recommend getting a piece of vaccum hose to stick over the nipple on the fluid bottle so you can reach over the exhaust and squirt it inside the rearend :thumbsup:
Also get some cardboard and stick infront of your exhaust pipe because when it comes out it will hit the pipe directly if that cardboard isnt there.
this task is so easy even Shunt could jump out of the trunk and do it :thumbsup: :lol:
took me 15 minutes tops :thumbsup:
1 - 9 of 86 Posts
well, since im a race car driver :lol: i should probably change it. my dealer said they would do it under warranty. their going to put royal purple in for me though. hes a great guy :thumbsup:its in the owner's manual. couldn't give you an exact page, but it does say "for racing purposes" change the diff fluid at 1500
i got about 20 bucks in summit racing credits. so im gonna run up. buy a bottle. got another bottle at home from when i changed the fluid in my silverado(calls for 1 1/2 quarts). then dropping the car off and their gonna take care of it for free.
im all setup to get my gear lube done on friday.
if your a very conservative driver and your looking for the bext mpg out of your ss, then id say, sure, change your oil every 15k. but for anyone who drives their car, no way in hell should you wait for anywhere close to 10k. thats stupid.
butthen again, it is your car. do what you want. so if i want to change it every 3k, im gonna change it every 3k.
i have royal purple in my diff on my silverado 2500 with 262k miles. no problems at all. you probably used the wrong weight fluid. there are 2 different kinds. ill be putting royal purple in the hummer when its due.
come to think of it, my gas mileage has gone up since ive had the fluid in. im sure its not all due to the fluid, but i had over 1 mpg increase. and when your only getting 10mpg's, 1 is a huge step!
thanks for the speach dad. but im gonna stick to changing my oil every 3k. dont be mad because of how i want to do things. do what you want. im just telling you im not changing it every 5k. i only have 4200 miles on my car and i got it last june. im not waiting once a year to change my oil. do i trust the computer in the car when it tells me its only at 45%? hell no. as far as anything being covered under warranty, thats not an issue. i have a great relationship with my service dept.
1 - 9 of 86 Posts
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