Diff flush question

[Mad4slalom]

Morning All, going to do a diff fluid and additive change. Do folk just suck out and replace or any advantage to fill with a cheaper diff oil of the same viscocity, then suck that out to flush out more of the old fluid before re filling with the proper ac delco fluid and additive.
what do you do ?

 

[Steven Smith]

Do it when the fluid is warm and any particulates are in suspension. If done cold any heavy particles will have settled to the bottom and you might not get them all out.
Also you can use diff oil with the friction modifier already added.

 

[Mad4slalom]

Do it when the fluid is warm and any particulates are in suspension. If done cold any heavy particles will have settled to the bottom and you might not get them all out.
Also you can use diff oil with the friction modifier already added.

Thanks for that , will do when warm , most say to only use the ac delco oil and separate additive so have gone with that but after speaking with Gavin we are going with fitting a drain plug ( a popular mod apparently) to ensure easier and complete draining. Just getting the bits together