Lost trans after 6mo. Rad?? - TCCoA Forums
 
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post #1 of 14 (permalink) Old 07-16-2006, 08:21 PM Thread Starter
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Lost trans after 6mo. Rad??

The hot weater has caused my coolant temperature gauge to hover around 1/2.
I'm pretty sure 1/3 is normal and 1/3 is also the thermostat tempertature.

Normally it runs at 1/3 unless you are stopped and the fan is not running. Once it reaches 1/2 the fan runs and pulls it back to 1/3. It will continue this cycle until you drive again. Also on the highway, good air flow, it runs at 1/3.

Lately it's been about 1/2 on the highway. Not overheating but high enough to know, it's not normal.

Last week the transmission lost it's front seal. Under warranty it was repaired plus upgrading to gluing in the front seal and increasing the drain back hole behind the front seal.

If the radiator was not properly or efficiently cooling the engine, I suspect it was not sufficiently cooling the transmission either.

With extending the life of the transmission in mind, I've replaced the radiator. It now runs at 1/3 on the highway but I'm concerned with my transmission temperature and considered installing a trans temp gauge.
What is the best placement for the sensor. Pan or pressure line?
And what is the a good transmission temperature?

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post #2 of 14 (permalink) Old 07-17-2006, 05:33 PM
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I think normal trans temps are supposed to be around 150-160. If you don't already have on, I would get a nice 24K transmission cooler. The trans. will thank you

Also, the "cooler" that you think the 2 lines are running to on your radiator is not really a cooler at all, but more of a heat exchanger. I would run a cooler in-line with that factory exchanger since you live in a cooler climate.

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post #3 of 14 (permalink) Old 07-17-2006, 05:42 PM
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If you still have the stock 95 trans I wouldn't be blaming the radiator on its failure.

I lost mine with less than 1000 miles on a rebuild.

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post #4 of 14 (permalink) Old 07-17-2006, 06:02 PM
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I opened up a fresh ford remann that was in my wifes car, granted it was working ok and the fluid looked good but the sungear looked like it had been chewed on by a very mean dog.
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post #5 of 14 (permalink) Old 07-17-2006, 06:03 PM
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post #6 of 14 (permalink) Old 07-17-2006, 06:06 PM
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ASAP! Why would you do such a thing

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post #7 of 14 (permalink) Old 07-17-2006, 06:07 PM
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post #8 of 14 (permalink) Old 07-17-2006, 06:09 PM
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ASAP,
Should have said "give me a call ASAP"

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post #9 of 14 (permalink) Old 07-17-2006, 11:59 PM
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Now that I have an XCal 2 and an infared thermometer, I have checked my gauge on the dash. In the 97 it has always ran at half to 3/4, even more so when it is 105+ out.

on my dash 1/2 is 190 degrees. 3/4 is 208-210. I suspect that 210 is fine, it runs good, stays around there, didn't puke its guts on a recent road trip and idling around at 115+ ambient (IAT temp was 124).

As far as tranny temps, I think that you will find that most say that 175 is optimal, 220 is high and starts breaking down fluid and is the reason for 20-30k fluid changes, and 250 will start seals hardening and breaking down.

If you really wanted to be good to your tranny, add an external cooler after the radiator heat exchanger. I don't know where you live, California or someplace North of the border, but I left the radiator in line even though it is aways relatively warm where I live.

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post #10 of 14 (permalink) Old 07-18-2006, 11:05 AM
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Quote:
Originally Posted by Bangster
If you really wanted to be good to your tranny, add an external cooler after the radiator heat exchanger.
In a cooler climate, it's best to mount the cooler before the heat exchanger. Dumping too cold fluid back into a hot tranny is no good either. This way will also help with engine cooling.

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post #11 of 14 (permalink) Old 07-18-2006, 01:20 PM
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Quote:
Originally Posted by 95_SilverBird
In a cooler climate, it's best to mount the cooler before the heat exchanger. Dumping too cold fluid back into a hot tranny is no good either. This way will also help with engine cooling.
I don't do that and I don't agree with any part of the reasoning behind that theory. The coolant in the radiator is often OVER 210 degrees. Heck, the low speed fan doesn't come on until 210 degrees on a stock tune. Why would you want to heat the trans fluid back up like that? It doesn't make any sense.
Do not do that.
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post #12 of 14 (permalink) Old 07-18-2006, 01:51 PM
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Make sure the tranny cooler is an LPD (low pressure Drop) or similar and it bypasses the cooler until the fluid reaches a certain temp, and put it after the heat exchanger in the radiator if you keep the fluid running though it.

I am questioning my decision to retain the heat exchanger given my driving style and environment. A cold morning for me is 50 degrees. A hot summer for me is 110 degrees. I don't let my cars warm up, I drive them semi sanely until they come up to temp, but I don't baby them, but I am not questioning at all my putting on a tranny cooler.

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post #13 of 14 (permalink) Old 07-18-2006, 02:14 PM
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I put on a tranny cooler and my tranny started smoking worse than it was. So for now, I put the lines back into the radiator. I bypassed the radiator altogether. It was a dumb mistake that will be fixed when I find the fitting and lines to do it correctly. Oh, it is very hot here. The temp and humidity are about the same.

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post #14 of 14 (permalink) Old 07-19-2006, 02:03 PM
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I bypassed my radiator with my cooler. I haven't had any problems. My cooler has a fan on it and trans temp stays around 180. This with a 3200 stall converter and jmod.

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