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Discussion starter · #21 ·
So finally got this wrapped up over the weekend.

I had to trim the plastic piece that pins to the rear of the front bumper. I could have removed it, but wasn't sure if it was necessary or not:
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I got it bolted in using SS self tapping screws. The contour of the bumper made it interesting to bolt in. Especially since I used sheet metal that was 5x thicker than I needed. So a little modification of the brackets to fit correctly was needed:
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This filter housing and filter I installed on the drivers side of the bumper. Again using SS self tapping sheet metal screws:
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Then I cut the transmission fluid return line coming out of the top of the radiator and spliced things there:
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So the way I plumbed it in is that fluid goes from the transmission --> to the bottom of the stock cooler in the radiator --> through the radiator and out the top --> into the bottom of the auxiliary cooler --> out of the top of the auxiliary cooler --> into the "In" side of the filter housing --> through the filter and out of the "Out" port --> and back into the transmission.

I haven't driven the car much before or since to know if does anything. But it definitely gives me piece of mind knowing that the fluid will stay cooler and I now have a decent filter that I can change out pretty easily.
 
Please excuse my ignorance and keep the flaming low. I am under the impression the lines from the trans flow to and fro the radiator to keep an optimal operating temp. Given this, is it counter productive to cool the temp below Volvo engineers operating temp that was spec? Lastly, what is the temperature difference achieved and would placement be chosen differently on one side of the fans if they were push/pull?


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Plenty of manufacturers, including Volvo, offer auxiliary coolers without any bypass or temperature control plumbed directly post radiator to cool the fluid effectively. There is no harm in 'over cooling' fluid as any AT will generate enough heat to drive off moisture and get the transmission up to operating temp. Myself, I installed a thermostat to bypass the cooler until the fluid is up to temp to allow the fluid to heat up faster. Once at operating temperature the thermostat will maintain fluid temp to ~80C, 74C-88C is the range I normally seen, highest I've seen driving it hard (Multiple launches from a dead stop to 60mph without cooldown) is 100C, all readings are taken through VIDA. IMO, if I'm seeing these temps with the size of cooler I have than this transmission can use as much cooling as possible.

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Plenty of manufacturers, including Volvo, offer auxiliary coolers without any bypass or temperature control plumbed directly post radiator to cool the fluid effectively. There is no harm in 'over cooling' fluid as any AT will generate enough heat to drive off moisture and get the transmission up to operating temp. Myself, I installed a thermostat to bypass the cooler until the fluid is up to temp to allow the fluid to heat up faster. Once at operating temperature the thermostat will maintain fluid temp to ~80C, 74C-88C is the range I normally seen, highest I've seen driving it hard (Multiple launches from a dead stop to 60mph without cooldown) is 100C, all readings are taken through VIDA. IMO, if I'm seeing these temps with the size of cooler I have than this transmission can use as much cooling as possible.

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What's the part number for that thermostat? Do you have an aftermarket temp gage? Or just use vida?

I just noticed my transmission fluid is cooked close to black. I've be waiting on getting the parts together for the aux rad installation, need bumper parts.

What's crazy is that I just changed my trans fluid about 10k miles and did 3 flushes. Must have been my thermostat and why my engine smelt like it was cooking. That and 120°F weather. Got all that changed a few weeks ago. Now need new fluid, rad mounted and filter. I hope it will be better.

Maybe added torque was coming it too? Mountain passes?

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What's the part number for that thermostat? Do you have an aftermarket temp gage? Or just use vida?

I just noticed my transmission fluid is cooked close to black. I've be waiting on getting the parts together for the aux rad installation, need bumper parts.

What's crazy is that I just changed my trans fluid about 10k miles and did 3 flushes. Must have been my thermostat and why my engine smelt like it was cooking. That and 120°F weather. Got all that changed a few weeks ago. Now need new fluid, rad mounted and filter. I hope it will be better.

Maybe added torque was coming it too? Mountain passes?

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Thermostat
https://derale.com/products/fluid-coolers/thermostats-1/fluid-control-thermostats/13011-detail

Check my build thread for installation. I bought seperate fittings.

Just using VIDA. Can only have so much of a light show on the dash before it gets cluttered.

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