Hello all
I have a 1995 G20 van with a little over 80,000 miles on it that is getting the axel shafts replaced that I bought new from the dealer and with the G80 option differential. As I have been the sole owner of it, I can say the rear Axel fluid has never been changed.
In the factory GM manual I have for it, it states to use GM fluid PN: 1052271 and lists that as a 80-W-90 GL-5 fluid.
Guess I actually had bought some of this over the years and have one bottle with that number that is black and talks about being GL-4 in the back, and one that is more clear and says GL-4 on the front.
Now I have been doing a lot of research via that 1052271 number and many times I see a bulletin that all the G80 dif's should use the GL-5 and that the GM number for this is 12378261 or 89021677. Which also btw, is a 75-W-90
So first am just wondering if anyone has any info on what I should be using?
Then second and kinda this is actually more a point why I am going to all this fuss is, is it back to mix the two? In other words, if lets say I am just replacing these axle shafts and so just really just do a drain of the case, if it had before the GL-4 and I put in the GL-5, will that be bad from just a fluid to fluid compatibility standpoint to have all the old fluid residue in there that will be mixed with the new?
Thanks for any help.
I have a 1995 G20 van with a little over 80,000 miles on it that is getting the axel shafts replaced that I bought new from the dealer and with the G80 option differential. As I have been the sole owner of it, I can say the rear Axel fluid has never been changed.
In the factory GM manual I have for it, it states to use GM fluid PN: 1052271 and lists that as a 80-W-90 GL-5 fluid.
Guess I actually had bought some of this over the years and have one bottle with that number that is black and talks about being GL-4 in the back, and one that is more clear and says GL-4 on the front.
Now I have been doing a lot of research via that 1052271 number and many times I see a bulletin that all the G80 dif's should use the GL-5 and that the GM number for this is 12378261 or 89021677. Which also btw, is a 75-W-90
So first am just wondering if anyone has any info on what I should be using?
Then second and kinda this is actually more a point why I am going to all this fuss is, is it back to mix the two? In other words, if lets say I am just replacing these axle shafts and so just really just do a drain of the case, if it had before the GL-4 and I put in the GL-5, will that be bad from just a fluid to fluid compatibility standpoint to have all the old fluid residue in there that will be mixed with the new?
Thanks for any help.