Silverado 10 Speed Spill and Fill?

[4WD]

unfortunately with the exhaust cross over it’s impossible to get the pan down breaking the exhaust manifold flanges loose.

Hmmm - wonder if one slip joint and one flange won’t make an easy to pull spool piece …

 

[Yolo]

Long time GM owner - mostly LT’s but now Tahoe - I have always just done the pan volume and not the second time you mentioned - doing this 30k-50k is more than many get …
What kind of transmissions temps are you seeing? My 10 speed was just running only 145°F @75 mph - 93°F outside …
Let us know how much drains out please !

145-153 mixed driving in Texas heat.

 

[SubieRubyRoo]

unfortunately with the exhaust cross over it’s impossible to get the pan down breaking the exhaust manifold flanges loose.

I got my stock pan out without dropping anything from the exhaust, and then swiveling the pan a little towards the driver side. Don’t know about how the GM is. With the PPE deep pan, I saw some guy who claimed you could jack up the output shaft/tcase end, and although mine appeared to move significantly, still nowhere near enough to sneak it between the exhaust and the stuff inside the rear of the VB area.

 

[SubieRubyRoo]

145-153 mixed driving in Texas heat.

The Chevy version runs significantly cooler than the Ford version, then. I think it’s due to the engine coolant loop in the heat exchanger directly under the pan.

Any Ford guys bypassed the coolant loop from their heat exchangers? I’m considering trying it, especially since I’m now running a PAO trans fluid.

 

[BrendanC]

Hmmm - wonder if one slip joint and one flange won’t make an easy to pull spool piece …

i don’t know why GM didn’t pull the crossover further back to the output shaft of either transmission, or transfer case. i had mine pulled all the way back to under the U joint. but mine is 22 years old lol.

 

[4WD]

i don’t know why GM didn’t pull the crossover further back to the output shaft of either transmission, or transfer case. i had mine pulled all the way back to under the U joint. but mine is 22 years old lol.

Yeah - It’s a bit of a pain on my 2017 - but still doable - think I won’t go as early on the newer one - but will study more late year.
Thanks.

 

[nascarnation]

145-153 mixed driving in Texas heat.

Makes sense, these units are optimized for minimal spin loss, the small steps between ratios don't generate much clutch heat on shifts, and with all the ratio coverage, duty cycle with the converter unlocked is minimal.

 

[meep]

The Chevy version runs significantly cooler than the Ford version, then. I think it’s due to the engine coolant loop in the heat exchanger directly under the pan.

Any Ford guys bypassed the coolant loop from their heat exchangers? I’m considering trying it, especially since I’m now running a PAO trans fluid.

Mine (ford) runs best when it’s at full op temp. Granted, I’m running a slightly thicker mix of fluid and that has a minor impact (1/4 LV/ULV). I personally wouldn’t want to lower the temp. I have no idea what bag of squirrels that might be with the calibration, adaptives, and whatever else is dialed in by the oem tuning. Since it’s a synthetic fluid (I’m pretty sure it’s a gp. III) the temps don’t worry me much. Also, when towing hard and heavy, the trans temps were well controlled, so headroom wasn’t a problem either. Just my opinion.

 

[SubieRubyRoo]

Mine (ford) runs best when it’s at full op temp. Granted, I’m running a slightly thicker mix of fluid and that has a minor impact (1/4 LV/ULV). I personally wouldn’t want to lower the temp. I have no idea what bag of squirrels that might be with the calibration, adaptives, and whatever else is dialed in by the oem tuning. Since it’s a synthetic fluid (I’m pretty sure it’s a gp. III) the temps don’t worry me much. Also, when towing hard and heavy, the trans temps were well controlled, so headroom wasn’t a problem either. Just my opinion.

I’ve got a 10R80 as well, and depending on city/hwy & speeds/towing involved, I’ve seen basically 197F-215F.

The old rule of thumb is that for every 25*F reduction in trans fluid temp, doubles the life of the trans. If this is still true, all other factors being equal, that means the GM trans would live ~4X longer than the Ford version. I know shift tuning is different, but a 50*+ difference in operating temps has something else going on.

BTW the Green CC I swapped in last week is shifting beautifully; I reset the shift parameters after the fluid swap… but the PPE deep pan doesn’t fit into place without dropping the exhaust

 

[Nuclear_42]

Owners manual specs 45k ATF change for severe service. My friend recently did his 22 1500 Silverado 10speed at 58k and the oil was very dirty/ used. Personally I would not go past 50-60k. For sure I would drop the pan to clean and change the filter to get rid of break in metal. After that I would just do drain and fills every 30-40k. Maybe drop the pan every 3rd service to clean/ change filter.