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New Modified Transmission Flush Method with Pictures

Help, Advice and DIY Tutorials on Volvo's extremely popular car line -- Volvo's 1990s "bread and butter" cars -- powered by the ubiquitous and durable Volvo inline 5-cylinder engine.

1992 - 1997 850, 850 R, 850 T5-R, 850 T5, 850 GLT
1997 - 2000 S70, S70 AWD
1997 - 2000 V70, V70 AWD
1997 - 2000 V70-XC
1997 - 2004 C70

larryh
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Re: ATF Flush P2 hose/clip won't come off

Post by larryh » Mon Mar 12, 2007 7:21 pm

14Whittier wrote:Have any experienced the frustrations of simply not being able to remove the hose to the radiator to attached the clear hose for the ATF flush? I am removing the lower hose facing firewall on the radiator (02 V70). These hose with the green simple clip mechanism just doesn't budget. Any suggestions or pointers ?
if they're the same green plastic clips as my 2000, just squeeze the clip and wiggle/pull on the hose....it's just an o-ring in there..



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Volvo v70 1999

Post by anniqu » Fri Aug 31, 2007 3:46 pm

Hello all

I was told by a local mechanic that I should be puting synthetic transmission oil in my 1999 volvo v70. I read the info about flushing the transmission but am not clear as to how I could flush it and replace the regular with synthetic fluid. It seems the manual system suggested would require that you continue to fill with regular fluid.


Michael Paris

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MadeInJapan

Post by MadeInJapan » Fri Aug 31, 2007 3:58 pm

synthetic or not (the reason he said synthetic is because Volvo calls their own ATF synthetic, even if it's really not). First determine if your car is an auto 5 speed or not (does it go up to 4 before D on the gearshift). If it is, you do need the Mobil-3309 or Volvo's own ATF (expensive- and this is the stuff they call synthetic...and by the way, Mobil-3309 and Volvo's own "synthetic" ATF are the exact same thing). If the gear shift does not go to 4 then D but 3 and then D, then you have a 4 speed auto (which I believe were still in the '99's) and you can use either Dexron III or Mobil Synthetic ATF (not #3309).

Anyway, whatever you're filling with, just drain, measure, fill that same amount through the fill tube, then go through the process of 2 quarts (or liters) out and 2 in...until you go through 12-14 quarts or liters (total). By letting the new push out the old, you'll pretty much eliminate what was in there....so, it really doesn't matter if you're truly going to synthetic or not in regards to whether or not the old will mix with the new and cause issue....

Just be aware that if your tranny has never been flushed like this and you are at high miles (over 100K or so) and your fluid smells burnt and is black, you're really best not to do a full flush but just drain what's out of the pan, and fill with the same amount and see how she goes. If all is well, after 500 miles or a week or so of local driving, then do it again.

Doing too much at once on a tranny that has never been serviced seems to loosen the gunk inside and cause more problems.

If you're doing just a plain 'ole drain and fill, I would try not to mix with synthetic but use what's in there....if it's a 4 speed automatic, this means Dexron III, if it's a 5 speed auto then the Volvo ATF or Mobil-3309. I guess the only time you would come up against putting something different in the tranny would be if you have a 4 speed auto and you wanted to upgrade to synthetic, such as Mobil Synthetic ATF (not the #3309 ATF).

Hope this helps.


'98 S70 T5 Emrld Grn Met/Beige Tons of Upgrades Mobil-1
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'07 S40 T5 AWD 6 speed manual! Silver/Black Stage1 Heico & Elevate
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Post by jar240 » Wed Sep 26, 2007 1:08 pm

I'm curious why the method requires filling through the dipstick tube... Why wouldn't it use a hose connected to the inlet (intake) of the trans cooler where we removed the hose, the other end in a large container of ATF, so we have a loop? Would it not suck in the right amount this way?

Thanks,
Chris



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Post by MadeInJapan » Wed Sep 26, 2007 3:12 pm

Because the fluid is not sucked through the system but pushed through....putting the dangling hose into a bucket of fluid will not automatically cause it to enter the hose and then the system. However, there are machines that assist the transmission pump that do exactly what you say, and both hoses are connected to that machine.


'98 S70 T5 Emrld Grn Met/Beige Tons of Upgrades Mobil-1
'04 V70 2.5T Red/Taupe Some Upgrades Mobil-1
'07 S40 T5 AWD 6 speed manual! Silver/Black Stage1 Heico & Elevate
'07 S60 2.5T Blue/Taupe- my kid's Volvo

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Post by jar240 » Wed Sep 26, 2007 3:45 pm

MadeInJapan wrote:Because the fluid is not sucked through the system but pushed through....
Aaah, that explains it! Thanks...

I found a case of Mobil1 3309 for a really good price here in Canada, and when I picked it up (it took 2 days to get it in), they told me it was N.F.R (Not For Resale). Fortunately they let me have it anyway since they didn't let me know in advance...and I'd prepaid for it.

Gonna try the flush this weekend...

Chris



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Post by Klausc » Wed Sep 26, 2007 7:37 pm

MadeInJapan wrote:Okay, did my own modified flush today on my '04 V70...everything went very smoothly. When I drained the fluid, exactly 3 quarts came out. With a case of 12 quarts I was going to fill with 3 to begin with and then flush 2 quarts a cycle, just holding back on the end with my last quart to top off with...this would leave 1 whole quart plus some.
MIJ,
I am just curious as to why you decided to drain the tranny before doing the flush. I was always under the impression a flush would replace everything anyway.

Klaus


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If I had a larger garage, I could have more Volvos.

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Post by MadeInJapan » Wed Sep 26, 2007 8:35 pm

Klaus...this is theory but doing the drain first assures that since everything is pushed through the system that I begin with good clean, new fluid behind the old dirty fluid with my flush. If you do 2 quarts and then add 2 quarts, the first 2 quarts you add will blend with the old causing the first batch that you add to be mixed about 50-50 in the tranny pan (assuming the tranny pan holds about 4 quarts). My method eliminates this from the get-go. Hope this makes sense.


'98 S70 T5 Emrld Grn Met/Beige Tons of Upgrades Mobil-1
'04 V70 2.5T Red/Taupe Some Upgrades Mobil-1
'07 S40 T5 AWD 6 speed manual! Silver/Black Stage1 Heico & Elevate
'07 S60 2.5T Blue/Taupe- my kid's Volvo

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Re: New Modified Transmission Flush Method with Pictures

Post by jar240 » Sat Sep 29, 2007 9:08 am

MadeInJapan wrote:Important- Please Read This First (Info for P2 Cars):
...the newer (P2- or '01 on) Volvo's transmission fluid flows in the opposite direction. In other words, when you take the tanny-to-radiator line off, you actually let the tranny flush out of the upper hose connection on the radiator with the newer Volvo's unlike what is written below (therefore
I went to start the flush and noticed my 2000 V70 has the green clips on the trans hoses at the cooler/rad. does this mean I have the reverse flow direction as with the P2's? Is there a way to tell without pulling the hose and starting the engine?

Thanks,
Chris



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Post by MadeInJapan » Sat Sep 29, 2007 10:01 am

I believe the reverse flushing began with year '01 (design change), but if you're scared as to what could happen, you might attach a hose to each end with the ends in a bucket to see what happens. You will however have to have 2 different diameter hoses to do this. Please report back, but I do believe your car is no different than the 850's and my '98 S70, despite a different connector.


'98 S70 T5 Emrld Grn Met/Beige Tons of Upgrades Mobil-1
'04 V70 2.5T Red/Taupe Some Upgrades Mobil-1
'07 S40 T5 AWD 6 speed manual! Silver/Black Stage1 Heico & Elevate
'07 S60 2.5T Blue/Taupe- my kid's Volvo

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