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  #13  
Old 04-23-2013, 08:54 AM
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Re: Transmission Temp

Mine was running in the 190-210 range on my road trip this weekend.
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Old 04-23-2013, 01:59 PM
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Re: Transmission Temp

Form my diesel truck experience, the tranny temp should be 60-80 degrees above ambient temp. That's just a rule of thumb and certainly may not be exact for a mid size SUV compared to a 3/4 ton diesel with a matching tranny. However, the 66RFE is supposedly not that far from the diesel Ram's 68RFE, but that also does not account for a much larger tranny cooler in the Ram as well.

Tranny temps rise quickly in hot weather, towing, or moving at slower speeds, or all three conditions simultaneously, but should cool down as speed increases and air rushes through. IF you are moving too slow or towing in hot weather, drop to a lower gear to run the engine faster to pump fluids and air. Lugging the tranny is also detrimental. Unfortuntately, I have not seen deep tranny pans like those for trucks. Aftermarket tranny pans can add an additional 3-4 quarts for better cooling and cooling fins.The best way is having a tranny cooler installed---the outside coolers work better than the combined radiator/tranny set ups.

Again, rule of thmb is keep that tranny below 220. Anything over 250 for more than an hour can start damaging the tranny. Heat kills.
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Old 05-11-2013, 06:27 PM
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To chime in, my 2014 warms up to 199 exactly when warm, then bounces back from 197 to 199. At first i thought there was a problem bc it is a little past the mid point and all the other gauges stay at the mid point. But the dealership said this was normal. If I put that big transfer case skid plate on, it runs around 205.
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Old 09-30-2013, 03:30 PM
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Re: Transmission Temp

Not to bump an old thread, but just to add that my 2014 Hemi seems to sit around 195 - 197 and I've seen as high as 205 when it was 90 degrees out. Seems to be normal for the new 8 speeds based on what I've seen in this thread and several others.
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Old 09-30-2013, 06:30 PM
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Re: Transmission Temp

Quote:
Originally Posted by TurboRush View Post
Not to bump an old thread, but just to add that my 2014 Hemi seems to sit around 195 - 197 and I've seen as high as 205 when it was 90 degrees out. Seems to be normal for the new 8 speeds based on what I've seen in this thread and several others.
The 8 speed trans in my 2014 Summit V8 does run 30-40 degrees hotter than the 2012 Overland V8 did.
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