"sorry, but fluid is not your culprit here...."
Thanks for the input garbergtsi… but unfortunately, you are incorrect. Read on…
I hope the rest of y’all are sittin’ down for this one… cause it’s not going to be pretty. Here we go…
I got my ’06 XC90 AWD V8 back 3 days ago, after doing a 2nd flush/fill (removing the Toyota Type-IV and putting in OEM Volvo fluid)… and guess what??? Yep, you guessed right… it WAS THE FLUID!!! No more shifting issues, no 2-3 upshift shudder, no harsh downshifts, no ‘clunks’ in garage shifts from D-R/R-D… nothing. Just nice, silky smooth shifts. :thumbup: Nothing else was done to the vehicle, besides an alternator replacement for a separate issue (‘Power System Service’message).
With that said, let me be the first to say… that the OEM Volvo transmission fluid (P/N 1161 540 or 640) is NOT (I repeat, NOT) the same as the Toyota Type-IV or Mobil 3309… with respect to the TF80-SC transmission, that is. Period. I’m not saying there’s a difference between the Mobil and Toyota (as they’re both listed on Mobil’s website below, which we’ve all looked at a thousand times).
http://www.mobil.com/USA-English/Lubes/PDS/GLXXENPVLMOMobil_ATF_3309.aspx
I am, however, saying that these (2) fluids (which are JWS 3309 compliant) are NOT the same as the Volvo fluid… which is NOT 3309 compliant.
If you take another look at the link above, and look straight across from ‘Volvo’ you will see under ‘Part No. or Specification’ that ONLY ‘5-Speed Automatics’ (such as the AW55-50/51N) are listed. Unless I am blind, I don’t see anything referencing any ‘6-Speed Automatics’ (such as the TF80-SC). Does anyone else see it???
Also, if one were to take a glance at the technical specifications for the Mobil 3309/Toyota Type-IV versus the OEM Volvo fluid… you’d see completely different numbers. See below:
Mobil 3309/Toyota Type-IV (taken from Mobil’s website above)
Viscosity
cSt @ 100ºC 7.2
cSt @ 40ºC 35
cP @ -40ºC (-40ºF) 14,000
Flash Point, ºC ›185
Pour Point, ºC ‹ -45
Density 0.8540
Volvo OEM ATF (taken directly out of a parts catalog at my local Volvo dealership)
Viscosity
cSt @ 100ºC 7.5
cSt @ 40ºC 40
Base Mineral Oil
Flash Point, ºC ›185
Pour Point, ºC -54
Density 0.870
I do not know how anyone can say that these two types of fluids are the same. That simply blows my mind. I don’t care “who called so-and-so at Mobil, etc.”… look at the numbers, the viscosities are clearly different. Not to mention, these fluids may have different additives and friction modifiers, etc. in them as well.
That leads me to believe that there appears to be some confusion between which fluid is applicable to which model transmission. Speaking directly to my Aisin Warner 6-Speed TF80-SC, this transmission does NOT accept any JWS 3309 compliant fluid. It takes a specialized AW-1 fluid, that not only Volvo makes… but also Saab and GM offer as well.
http://www.eeuroparts.com/Main/PartDetail.aspx?id=93165147
I couldn’t find any information relating my transmission (again, the TF80-SC) to anything noting the JWS 3309 specification, nor is that spec. listed on the fluid containers.
Luckily, I only drove my XC90 about 100 miles with the incorrect (Toyota Type-IV) fluid in it… so hopefully no further harm was done.
Final thought… I HIGHLY recommended to anyone doing a transmission flush/fill (or any transmission service requiring a flush/fill, such as a valve body replacement) on a vehicle with a TF80-SC, to strongly consider using a AW-1 approved fluid. I know it is pricey, but it’s cheaper than putting the wrong fluid in and causing other issues and/or possibly ruining your transmission.
Take this for what it’s worth… and keep arguing about the fluid all you want. All I know is that my TF80-SC is very happy with the OEM Volvo fluid in it, and therefore, so am I!
Have a nice day.
P.S. pengc99, my alternator was in fact the culprit of my ‘Power System Service’ message. I did find a few threads that described the same exact problem, and had it replaced with a new Bosch unit. Thanks.