('06-'08) Transmission Fluid Change or Flush? - Subaru Forester Owners Forum
Subaru Forester Forum
ebay search
Subaru Forester Forum
Go Back   Subaru Forester Owners Forum > Technical Forums and Vehicle Assistance > Transmission and Driveline
SubaruForester.org is the premier Subaru Forester Forum on the internet. Registered Users do not see the above ads.
User Tag List

Reply
 
LinkBack Thread Tools Search this Thread Display Modes
Old 03-04-2011, 10:10 AM   #1 (permalink)
Registered User
 
Join Date: Mar 2011
Posts: 2
Location: Bellingham WA
Car Year: 2007
Car Model: Forester 2.5XT
Gallery: 0
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Feedback Score: 0 reviews
Default Transmission Fluid Change or Flush?

Re: 2007 Forester 2.5XT

I love my car and I want to treat it right, but I need some help from those Subaru mechanical experts out there!

I have a few questions before I proceed with Transmission fluid change:

1) my shop has given me a quote of $245 for a transmission fluid change. I have not actually asked them if they are planning on doing a change or flush. Is this price high, or normal?

2) I was told that the fluid is dark, but not stinky. Should a change or a flush be done?

3) I use full synthetic for my oil. Should I use full synthetic for my transmission?

Thank you. Looking forward to your responses.
lolasolomonjack is offline   Reply With Quote
Sponsored Links
Advertisement
 
Old 03-04-2011, 10:33 AM   #2 (permalink)
Forum Member
 
guroove's Avatar
 
Join Date: Jun 2007
Posts: 4,580
Location: Buffalo, NY
Car Year: 2005
Car Model: Forester XT
Transmission: 4eat
Gallery: 0
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 4 Post(s)
Feedback Score: 13 reviews
Default

1) I'm not sure if this is high compared to other shops, but I find it extremely high for something that you can easily do yourself for the cost of the fluids.

2) I don't believe in flushes for our transmissions. I have always drained and filled every 15,000 miles or so.

3) I use synthetic transmission fluid and never had a problem with it. Subaru HP-ATF or whatever the new spec fluid is called is very good fluid though, and you can use it without fear of it not being able to properly lube and protect your transmission. There was a change between '05 and '06 models from Dex III to the new stuff.

If you do decide to do it yourself, remember that not all the fluid comes out when you drain your transmission. You only end up getting between 1/3 and 1/2 of the fluid out. If you buy 5 quarts, you should be safe, unless you remove the spin-on filter and let your car sit for 30 minutes or longer trickling fluid out. Someone on this forum managed to get 6 quarts of fluid out this way. The transmission holds about 12 quarts. You should always check your level with the engine running and the transmission in park.
__________________
2005 Obsidian Black Pearl XT w/4eat
guroove is offline   Reply With Quote
Old 03-04-2011, 10:54 AM   #3 (permalink)
Registered User
Thread Starter
 
Join Date: Mar 2011
Posts: 2
Location: Bellingham WA
Car Year: 2007
Car Model: Forester 2.5XT
Gallery: 0
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Feedback Score: 0 reviews
Default

thank you for the info.

This may be a stupid question, but... is it ok to mix regular and synthetic fluid?
lolasolomonjack is offline   Reply With Quote
Old 03-04-2011, 11:01 AM   #4 (permalink)
Forum Member
 
guroove's Avatar
 
Join Date: Jun 2007
Posts: 4,580
Location: Buffalo, NY
Car Year: 2005
Car Model: Forester XT
Transmission: 4eat
Gallery: 0
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 4 Post(s)
Feedback Score: 13 reviews
Default

Quote:
Originally Posted by lolasolomonjack View Post
thank you for the info.

This may be a stupid question, but... is it ok to mix regular and synthetic fluid?
It is, and in my experience is unavoidable, if you plan on using synthetic in a transmission that came with non-synthetic.
__________________
2005 Obsidian Black Pearl XT w/4eat
guroove is offline   Reply With Quote
Old 03-04-2011, 12:54 PM   #5 (permalink)
adc
Forum Member
Contributing Member
Supporting Member
 
adc's Avatar
 
Join Date: Aug 2007
Posts: 11,286
Location: Elizabethtown, Pa.
Car Year: 2008
Car Model: 2.5X
Gallery: 98
Mentioned: 5 Post(s)
Tagged: 0 Thread(s)
Quoted: 280 Post(s)
Feedback Score: 0 reviews
Default

I agree with guroove. I have known flushes that have gone bad. If you change filters use the genuine filter. After market ones are not compatible.
__________________
Be careful what you wish for.
adc is offline   Reply With Quote
Old 03-04-2011, 01:40 PM   #6 (permalink)
has awakened!
Lifetime Supporting Member
 
2.5x_sleeper's Avatar
 
Join Date: Aug 2007
Posts: 20,047
Location: Newberg, OR
Car Year: 2007
Car Model: Forester Sports XT
Transmission: 4EAT
Gallery: 0
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 94 Post(s)
Feedback Score: 39 reviews
Default

I see this is your first post forum post, so welcome to the forum from Oregon!

In my opinion, it depends on how many miles you have on your Forester & if you had the transmission flushed previously. If you have high miles & never had the transmission flushed, I would recommend against doing it now.

Both our Foresters are in 20-30K miles range & they had a "total fluid transfer", or flush. with zero problems. We also opted for Redline synthetic ATF & Redline synthetic 75W-90. This was an upgrade at our trusted Subaru dealership shop.

If you want the transmission filter changed, you have to request it. Subaru considers the ATF filter a nonservice item... a permanent filter.

Bobby...

['07 FSXT MODding Journal] ['03 X MODding Journal]
__________________
'07 FSXT - COBB Surgeline dyno Protune - Stage 1+
'03 X +AVO turbo kit = XT (son's)
'95 Neon Sport
2.5x_sleeper is offline   Reply With Quote
Old 03-09-2011, 03:53 AM   #7 (permalink)
Registered User
 
Join Date: Jan 2011
Posts: 23
Location: Cincinnati
Car Year: 09
Car Model: Forester XT
Gallery: 0
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Feedback Score: 0 reviews
Default

off topic, but how would you guys recommend measuring the tranny fluid when draining it? I drained it last night, and it is in a fresh brand new oil pan, but what can i use to measure it easily? i looked in the manual for my 09, and it says 9.8 quarts! What would be my easiest way to measure this?
apgarabu is offline   Reply With Quote
Old 03-09-2011, 05:58 AM   #8 (permalink)
Forum Member
 
trailangel's Avatar
 
Join Date: Aug 2009
Posts: 1,334
Location: Los Angeles
Car Year: 2010
Car Model: Forester 2.5X
Gallery: 0
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Feedback Score: 0 reviews
Default

Buy some ATF in quart bottles. Dump a quart into your trans in the correct location!!! Fill up the empty bottle with used ATF from the drain pan. Now you have measured one quart. Proceed with the next quart.
__________________
TrailAngel
2010 2.5X 5MT
trailangel is offline   Reply With Quote
Old 03-09-2011, 06:19 AM   #9 (permalink)
Forum Member
 
guroove's Avatar
 
Join Date: Jun 2007
Posts: 4,580
Location: Buffalo, NY
Car Year: 2005
Car Model: Forester XT
Transmission: 4eat
Gallery: 0
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 4 Post(s)
Feedback Score: 13 reviews
Default

Quote:
Originally Posted by apgarabu View Post
off topic, but how would you guys recommend measuring the tranny fluid when draining it? I drained it last night, and it is in a fresh brand new oil pan, but what can i use to measure it easily? i looked in the manual for my 09, and it says 9.8 quarts! What would be my easiest way to measure this?
9.8 Quarts doesn't all come out at once. If you change the fluid regularly, you don't need to do a complete change. Also, a complete change is technically impossible. If you just let it drain until it trickles, you only need to put 4-5 quarts back in.
__________________
2005 Obsidian Black Pearl XT w/4eat
guroove is offline   Reply With Quote
Old 03-09-2011, 08:31 AM   #10 (permalink)
Forum Member
 
vintage42's Avatar
 
Join Date: Sep 2007
Posts: 4,286
Location: Louisville, KY
Car Year: 2008
Car Model: LL Bean (4EAT)
Gallery: 0
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 4 Post(s)
Feedback Score: 1 reviews
Default

Quote:
Originally Posted by lolasolomonjack View Post
...
1) my shop has given me a quote of $245 for a transmission fluid change. I have not actually asked them if they are planning on doing a change or flush. Is this price high, or normal?
2) I was told that the fluid is dark, but not stinky. Should a change or a flush be done?
3) I use full synthetic for my oil. Should I use full synthetic for my transmission?...
1
The price is a little high. Most dealers charge around $200 for changing the full capacity of 10+ quarts. This is called a flush because it is a complete replacement, but is not a flush. Dealers do it using the transmission's own pressure to circulate old fluid out and new fluid in, using a pump-less double-chambered tank made by BG. The transmission pushes old fluid into one chamber which pushes new fluid out of the other chamber and into the transmission. It's not the dreaded power flush that people imagine, as the transmission is just pumping the fluid around with its own internal pressure as usual:
"BG PF5 Power Flush and Fluid Exchange System... has no power supply of any kind..."
BG Products, Inc.

2
If the fluid is dark, it should be flushed as above. The alternative is to drain and refill the transmission 2-3 times separated by short drives. Because each draining only removes 3.75 quarts, and new fluid then mixes with the old, the total fluid supply only gradually becomes newer through serial dilution. But it takes your time, and wastes several quarts of new fluid.

3
Your year requires High Performance ATF such as:
Subaru ATF/HP (P/N SOA868V9241).
IDEMITSU ATF HP.
Castrol Transmax J.
Pennzoil ATF-J.
Don’t use Dexron 3.
The proper synthetic recommended by AMSOIL should be OK, but the dealer likely won't have it or do it. And if you do the serial drain and refill, the waste will be unusually expensive, and the result will be a mixture of some old dark conventional fluid with new synthetic.

Some people do a single drain and refill of the 3.75 quarts every 10-15,000 miles, and so maintain a relatively fresh mixture of fluid. But since you have a 2007 with some years and miles, and a turbo with its power, and have already darkened the fluid, I think you should get the flush.
vintage42 is offline   Reply With Quote
Old 03-09-2011, 08:37 AM   #11 (permalink)
Pleiads' biggest leghumper
Contributing Member
Supporting Member
 
joe r's Avatar
 
Join Date: Oct 1978
Posts: 9,315
Location: Cashmere, WA 98815
Car Year: 04's
Car Model: 2 FXT's.
Gallery: 0
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 1 Post(s)
Feedback Score: 71 reviews
Default

Pyrex measuring cups are the best for things like this!




joe r
__________________
04 FXT manual Platinum Silver "Sti swapped"= Mine.
04 FXT auto Sierra Gold = Hers.
joe r is offline   Reply With Quote
Old 03-09-2011, 11:50 AM   #12 (permalink)
 
Tuned200's Avatar
 
Join Date: Jan 2008
Posts: 21,650
Location: Florence, KY
Car Year: 2007
Car Model: FSXT / FSTI
Transmission: 4EAT / 6 MT
Gallery: 2
Mentioned: 9 Post(s)
Tagged: 0 Thread(s)
Quoted: 35 Post(s)
Feedback Score: 60 reviews
Default

I have my trans fluid drained and filled every 15K....its cheap insurance for the power levels I am at.
__________________
2007 Forester STI - The Gray Goose
2007 XT Sport 4EAT - Maverick
2006 Forester XT -Sold- Blu-Blur
2010 Forester X - Sold-The Green Goblin
Tuned200 is offline   Reply With Quote
Old 03-09-2011, 11:54 AM   #13 (permalink)
has awakened!
Lifetime Supporting Member
 
2.5x_sleeper's Avatar
 
Join Date: Aug 2007
Posts: 20,047
Location: Newberg, OR
Car Year: 2007
Car Model: Forester Sports XT
Transmission: 4EAT
Gallery: 0
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 94 Post(s)
Feedback Score: 39 reviews
Default

I agree, nothing wrong with a transmission flush, as long as you start early on.

If you have lots of miles & haven't done a transmission flush, doing one may cause you problems.

Bobby...

['07 FSXT MODding Journal] ['03 X MODding Journal]
__________________
'07 FSXT - COBB Surgeline dyno Protune - Stage 1+
'03 X +AVO turbo kit = XT (son's)
'95 Neon Sport
2.5x_sleeper is offline   Reply With Quote
Old 03-09-2011, 05:31 PM   #14 (permalink)
Forum Member
 
vintage42's Avatar
 
Join Date: Sep 2007
Posts: 4,286
Location: Louisville, KY
Car Year: 2008
Car Model: LL Bean (4EAT)
Gallery: 0
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 4 Post(s)
Feedback Score: 1 reviews
Default

Quote:
Originally Posted by 2.5x_sleeper View Post
... If you have lots of miles & haven't done a transmission flush, doing one may cause you problems...
Describe what you mean by "flush"?
Are you referring to the BG system?
How is the BG system different from a transmission cooler?
In both cases, the transmission's own natural internal pressure pushes fluid out a hose into another device -- either a cooler or a tank.
In the case of the BG tank, what comes back in the return hose is new fluid instead of old.

I think you are referring to a pressurized flush of the transmission. That must be some old urban myth that goes this way:
1. Attach high pressure pump to transmission.
2. Force in a solvent to push out the old fluid and stir up any loose crud.
3. Drain transmission leaving some solvent and crud.
4. Refill with fluid and let the loose crud do its job.
vintage42 is offline   Reply With Quote
Old 03-09-2011, 05:35 PM   #15 (permalink)
Forum Member
 
vintage42's Avatar
 
Join Date: Sep 2007
Posts: 4,286
Location: Louisville, KY
Car Year: 2008
Car Model: LL Bean (4EAT)
Gallery: 0
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 4 Post(s)
Feedback Score: 1 reviews
Default

Quote:
Originally Posted by Tuned200 View Post
I have my trans fluid drained and filled every 15K...
You are referring to a 3.75-quart simple drain and fill, not a replacement of the whole 10+ quarts using the BG system.
vintage42 is offline   Reply With Quote
Sponsored Links
Advertisement
 
Reply

  Subaru Forester Owners Forum > Technical Forums and Vehicle Assistance > Transmission and Driveline

Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On



All times are GMT -8. The time now is 04:32 PM.



Powered by vBulletin® Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
Content Relevant URLs by vBSEO 3.6.0
User Alert System provided by Advanced User Tagging v3.1.0 (Pro) - vBulletin Mods & Addons Copyright © 2014 DragonByte Technologies Ltd.