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TCM swap

Help, Advice, Owners' Discussion and DIY Tutorials on Volvo's stylish, distinctive "P2" platform cars.

2001 - 2007 V70
2004 - 2007 V70 R
2001 - 2007 XC-70
2001 - 2009 S60
2003 - 2007 S60 R

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vtl
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Year and Model: 2005 XC70
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vtl

Re: TCM swap

Post by vtl » Mon Jun 10, 2019 9:11 pm

After 20-30 minutes ATF temperature raises, viscosity drops, leaks get worse.

Mobil is not the right viscosity, it has [email protected] 7.2, while OE ATF is 7.5 and has a better friction additives package. Shifts with Mobil are more harsh. You may try to cure it with HFM since you've got two boxes...

Installing additional oil cooler is a very basic job. Get Hayden Rapid-Cool of your choice and aluminium angles and bolts/nuts in Home Depot. Here's my frame for the cooler that mounts onto A/C radiator (it has mount holes):

Image

And that's how it looks on the car:

Image

Wise to install a 3/8" Magnefine inline transmission filter at the same time.
05 XC70 260k, 16 XC60 40k, 19 Tundra 1k

dejanaleksov
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dejanaleksov

Re: TCM swap

Post by dejanaleksov » Fri Aug 16, 2019 11:01 am

Nice thread, but did it solve anything? Vtl u r helping people, guess u like theese volvos to be driven more. Appreciate that. Cheers. BTW I have similar problem. Let's hope I will solve the problem and drive this volvo for a long time. Excellent car, not the gearbox

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vtl
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vtl

Re: TCM swap

Post by vtl » Fri Aug 16, 2019 11:48 am

Transmission shifts much smoother when ATF is below like 85 degrees Celsius.

Gearbox is fine. "Lifetime ATF" is not. Flush it every 30k miles and it will run north of 200k miles with no issues.
05 XC70 260k, 16 XC60 40k, 19 Tundra 1k

Xc70V
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Re: TCM swap

Post by Xc70V » Wed Jan 29, 2020 10:05 pm

abcdetech

Hi,

Just wondering if the flush helped solve your shifting problem from R to Drive. I’m experiencing the same problem and would appreciate hearing your experience.

Thx.

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