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  1. #1
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    Mar 2018
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    Default Transmission slip - below 30 mph Transmission swap - what trans numbers work?

    2007 XC70 125k. Transmission slips at lower speeds. I baby the car to avoid slip, but it happens occasionally.

    Trans slips if we power around sharp turns, if I coast it no slip. Very occasional slip driving about 25-30. Not a daily thing and I am careful.

    How best to diagnose issues? Are there certain likely issues from these lower speed symptoms?

    Considering buying a 2006 s40 parts car with locked up 2.5T motor & good transmission. I can get the Transmission numbers - is there a reference on what transmission numbers will work for my 2007 XC70?

  2. #2
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    Sounds like your problem isn't all that bad, why not just replace the valve body which most likely will cure it?
    Past Volvos : 01 V70 T5, 01/02 V70XC, 02 V70 NA, 00 V70XC
    Current EV/Hybrid : 13 Tesla S85, 11 Gen3 Prius
    Friends cars under my care 17 Audi A4 Quattro DSG (B9) 05 Audi A4 Manual 6sp Quattro (B7) 04 e320 V6 Auto, 05 Accord 2.4, 08 Element 2.4, 08 Camry Hybrid
    Past Others : 01/03 VW MK4 Turbo/NA/01M. Gen1 Prius, Gen1 CRV, Gen2 Rav4, 02 Town&Country, 06 Corolla, 12 Audi A4 Quattro (B8), 07 Civic 1.6
    https://sites.google.com/view/howardsvolvos

  3. #3
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    Definitely check the condition of the transmission fluid. If you're at 125k miles and it's still the original ATF, replace it using Gibbons Method! Try the simple. less expensive fixes first.
    2007 XC70, 206,000 miles
    2002 V70XC, 130,000 miles, parts car

  4. #4
    Join Date
    Feb 2010
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    Slow down, pardner...

    It slips. Got it.

    low fluid and/or poor fluid condition can cause a slip, so before you start shopping for a new transmission...

    Check the fluid level. Minimum 20 minutes of driving, find a dead-level spot, leave it idling in park and pull the dipstick, wipe it clean on a white paper towel. re-insert and check the level. Check the paper towel and dipstick for color/condition.

    If the level is off, correct it.

    Personally, I would do a fluid cooler line exchange (the Gibbons method), easily done, get the kit from IPD and buy a case of Toyota T-IV at your local Toyota dealer. (Mobil 3309 on Amazon is another good bet).

    With clean fluid at the proper level, if you've still got slipping, then, and not before, it's time to consider mechanical repair...
    Current Fleet:
    2016 Tundra Crewmax 4WD 1794
    2005 MB S600 (126K, Michelin AS4, HPL 0W40)
    2005 MB SL600 (55K Michelin AS4, Mobil 1 0W40)
    2004 V70R (143K, six speed M66, HPL 5W40)
    2004 XC90 (235K, HPL 0W30 Euro)
    2002 V70-XC (295K, HPL 0W30 Euro)
    2002 V70-T5 (225K, IPD bars, Bilsteins)
    2001 V70-T5 (125K, IPD downpipe, cat back and other mods)
    1932 Packard Sedan (straight 8, dual sidemounts, original paint and interior, Shell Rotella 15W40)

  5. #5
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    Default

    Thanks all.

    The original fluid was black. Changed the fluid. Ran the car for a week, the fluid was again black. Changed it again. I've driven the car about 3000 miles since then and have the occasional slips.

    So this is why I am considering the valve body or trans

  6. #6
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    Quote Originally Posted by jerseyjeff View Post
    Thanks all.

    The original fluid was black. Changed the fluid. Ran the car for a week, the fluid was again black. Changed it again. I've driven the car about 3000 miles since then and have the occasional slips.

    So this is why I am considering the valve body or trans
    This is useful info. 1 week old ATF going black is probably a bad sign. Now I see why you are extrapolating ahead. What is color of ATF now at 3k (on dipstick anyway)?

    In my experience, these ATF can turn darker quickly (not running 16 quarts through, slso read oxidation makes it darker). Usually dark red / brownish shade if drained soon after flush. Shade will be lighter on the stick. But definitely not black which indicates problems.
    Past Volvos : 01 V70 T5, 01/02 V70XC, 02 V70 NA, 00 V70XC
    Current EV/Hybrid : 13 Tesla S85, 11 Gen3 Prius
    Friends cars under my care 17 Audi A4 Quattro DSG (B9) 05 Audi A4 Manual 6sp Quattro (B7) 04 e320 V6 Auto, 05 Accord 2.4, 08 Element 2.4, 08 Camry Hybrid
    Past Others : 01/03 VW MK4 Turbo/NA/01M. Gen1 Prius, Gen1 CRV, Gen2 Rav4, 02 Town&Country, 06 Corolla, 12 Audi A4 Quattro (B8), 07 Civic 1.6
    https://sites.google.com/view/howardsvolvos

  7. #7
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    Quote Originally Posted by jerseyjeff View Post
    Thanks all.

    The original fluid was black. Changed the fluid. Ran the car for a week, the fluid was again black. Changed it again. I've driven the car about 3000 miles since then and have the occasional slips.

    So this is why I am considering the valve body or trans
    I’m curious - how did you check the level?

    And how did you change the fluid?

    Because draining it out gets roughly 3.5 QT out of the 8 it holds.

    So, done twice, you’re at two thirds new fluid...and still suffering from poor fluid.

    If it’s working well, except for this occasional bit, a valve body would be my next recommendation, but the 2007 transmission wasn’t known for premature valve body wear, so I would want to be certain that the fluid is good and the level was good before surgery.
    Current Fleet:
    2016 Tundra Crewmax 4WD 1794
    2005 MB S600 (126K, Michelin AS4, HPL 0W40)
    2005 MB SL600 (55K Michelin AS4, Mobil 1 0W40)
    2004 V70R (143K, six speed M66, HPL 5W40)
    2004 XC90 (235K, HPL 0W30 Euro)
    2002 V70-XC (295K, HPL 0W30 Euro)
    2002 V70-T5 (225K, IPD bars, Bilsteins)
    2001 V70-T5 (125K, IPD downpipe, cat back and other mods)
    1932 Packard Sedan (straight 8, dual sidemounts, original paint and interior, Shell Rotella 15W40)

  8. #8
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    NJ
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    Default

    My mechanic changed the fluid. I don't have the specifics on exactly how did did that, but he did discuss that it was a process and took some time to drain.
    After 2 trans fluid changes, I was told that black fluid is not a good sign

    We can change by Gibbons method, keep driving the car looking for slippage and then again checking the fluid.

    We can install a rebuilt valve body.

    Just want to make sure I'm on the right track.

  9. #9
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    Quote Originally Posted by jerseyjeff View Post
    My mechanic changed the fluid. I don't have the specifics on exactly how did did that, but he did discuss that it was a process and took some time to drain.
    After 2 trans fluid changes, I was told that black fluid is not a good sign

    We can change by Gibbons method, keep driving the car looking for slippage and then again checking the fluid.

    We can install a rebuilt valve body.

    Just want to make sure I'm on the right track.
    As Astro14 eluded to, need to have a bit of precision here

    - Since you didn't do the ATF change, know if mechanic did drain+fill (quick job but only change 50%) or a D+F along with cycling out additional fluid via tapping inline flow (commonly called Gibbons method here but pretty much the same method on all auto cars with an ATF cooler)

    - Modern automatics measure fluid level with engine running in idle. ATF pump needs to be running to cycle fluid throughout the cooling system. Can you confirm fluid level was checked this way? If not, then fluid level will be way off. Just about all mechanics should be familiar with this.

    - What was the ATF used for flush. Exact brand and type would be helpful.

    If say 90%+ of fluid was replaced and became black again within a week, there would be pretty significant wear going on. Not sure it could have survived 3000 miles without major problems. So best have some precise info on what was done and observed.
    Past Volvos : 01 V70 T5, 01/02 V70XC, 02 V70 NA, 00 V70XC
    Current EV/Hybrid : 13 Tesla S85, 11 Gen3 Prius
    Friends cars under my care 17 Audi A4 Quattro DSG (B9) 05 Audi A4 Manual 6sp Quattro (B7) 04 e320 V6 Auto, 05 Accord 2.4, 08 Element 2.4, 08 Camry Hybrid
    Past Others : 01/03 VW MK4 Turbo/NA/01M. Gen1 Prius, Gen1 CRV, Gen2 Rav4, 02 Town&Country, 06 Corolla, 12 Audi A4 Quattro (B8), 07 Civic 1.6
    https://sites.google.com/view/howardsvolvos

  10. #10

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    Every other thread is not finished,by the man starting the thread. Wtf

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