Will a cooler thermostat and fan adjustmants make the transmission fluid temps. run a little cooler? Thanks in advance.

-Mike

 

My coolant guage seems to run in the middle or just over it most of the time. I could swear it used to run cooler than that. Where do your's read? Thanks in advance.

-Mike

 

My temp gauge has always been just below the middle mark while driving, and a bit over the middle mark when in slow traffic. In the summertime after I shut her down and the heat just simmers under the hood it'll get a few needle widths above the middle too.

 

naaah...

you'd need to get a tranny cooler in order to do that.... so it cools the tranny fluid...

 

I already have a transmission cooler and it is hooked up the the trans. return line. My trans. temps still get to 217 after heavy traffic. This is driving through town to get the the highway for 5 minutes, then a 25 minute highway drive, and then back into usually heavy traffic for another 20 - 25 minutes. When I go to park the car the trans. temps. fluctuate between 199 and 217 or so. Granted I do have a higher than stock stall converter (2800 stall) and 3.29's.

Someone told me that since the trans. fluid runs through the radiator heat exchanger & that the fluid will get to close to what the coolant temps read. I was wondering if I lower things a bit if this would help any? Thanks man.

-Mike

 

How cool do you want the tranny? Mine is always around 200-210 in normal city/traffic driving. It reaches 220-230 in long uphill climbs or when in tapshift for more than a minute or two.

 

Really Red? When my trans. hit 230 + it would start to shift funny. Put a cooler on that thing... At 239 to 243 degrees our transmissions go into limp mode and the shifts will get long. When mine hit 244 two weeks ago I just had to get a cooler. Repeated times getting that hot WILL burn the fluid and maybe other $hit in the transmission. After spending 3500.00 on a rebuild I can't afford to blow it up. lol... A cooler transmission will last longer. I honestly believe heat kills our transmissions. After looking at the X-Over and how close it comes to the transmission on my GTP there is a couple of inches between the two. On the GXP the X-Over literally sits on top of the transmission so I can see ours running hotter than the six's do.


-Mike

 

Yeah, I was worried at first too but another member contacted GM and was told that 230 was "normal" and to start worrying when the trans hit 260. I still worry though, which is why I'm leaving the car stock besides exhaust to make damn sure I'm covered under the 100k powertrain warranty when it does go out lol. I just reached 35k and she's had a funny shift or two in the past couple weeks, so we'll see. Until I'm out of warranty I'll let GM worry about it!

 

Wow, 230 is normal? Here look at this and scroll down about halfway. This is a good guide to go by.

http://www.clubgp.com/newforum/tm.as...mode=1&smode=1

-Mike

 

Lol not my words; I'm not saying you're wrong, trying to argue with you, or doubting you. I'm still not sure about auto trans myself so thats why I asked how cool you were looking for it to run. Thanks for the trans temp guide link tho mang.

 

I never thought you were trying to argue or doubt me or anything like that. lol...

I want my transmission to run between 180 and 210 in traffic, depending on the weather. I panic when it climbs higher than 210. lol... I don't feel it should with a motorhome transmission cooler on it.

I may try running a cooler thermostat and adjusting the fans for a lower temp. turn on point. The cooler is right in front of one of the fans.

-Mike

 

Our transmission operating temp is a little high and 230 usually normal but that doesn't mean our tranny fluid can handle it. I've been running at 180 in the city with after installed my cooler. I think that'll keep the fluid from breaking down prematurely.

 

Wow, 180 in the city? That's great! Wish mine was like that... I bet it would be if I kept the rebuild in stock form. On the highway it flucuates from about 175 to 195 and in the city it flucuates from about 190 - 217 or so...

I may put a new thermo in the car tomorrow or on Tuesday. In the next couple of weeks I will adjust my fans and adjust the transmission shift points. I am sure that will cure much of the heat issues.

Does anyone know where the petcock is to drain the coolant? Thanks in advance.

-Mike

 

Are you guys runnin your trans coolers before or after the rad/trans cooler?

 

I am running mine after the one in the radiator on the return line.

-Mike

 

Changing it wasn't that bad. You really need to take off the exhaust shield on the front manifold. This makes it alot easier to deal with getting the housing off. Took about 1/2 hour. The longest part is bleeding it of air. Other than that it's really a piece of cake.

-Mike