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Old 11-20-2015, 10:09 AM   #1415
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Sure Brad... Here is the specs...

Derale's TH400 Deep Transmission Cooling Pan #14202 uses air passing beneath the vehicle and redirects it to help lower transmission oil temperatures. With brazed, turbulator-equipped airway tubes passing through the lower section of the transmission pan for more efficient cooling, each is individually pressure tested to ensure a leak-free pan. We've included a much stronger magnetic drain plug and rubber/steel reusable washer, in addition to a 1/8" NPT temperature sender bung located in the side of the pan. Finished with a durable black two-stage coating, each pan also includes neoprene gasket and 1/8" NPT temperature sender plug.

Specifications
Pan depth: 4"
Tube depth: 3-1/16"
Extra capacity from Std. OE pan: 3 qts. 8 oz.
Extra capacity from Deep OE pan: 1 qt. 3 oz.
Temp bung size: 1/8" NPT
Features
Heavy gauge stamped steel construction
Two stage heat dissipating black finish
1/8" NPT temperature sender port
Reduces fluid temperatures 20-50F
Increases fluid capacity by up to 3 qts. 8 oz.
Patented turbulator cooling tubes add heat transfer capability
Magnetic drain plug with increased magnetic strength and rubber/steel washer
Pan depth: 4"

Looks like this..


Link to Derale page.
Cooling Pans : GM TH-400 Deep Transmission Cooling Pan


You can find them on Ebay for about $125, but I grabbed the last one at a vender for $113 shipped.
As I said, I actually prefer the cast aluminum pans, as they add stiffness to the transmission, but as the longer term plan to put a built 4L80E in, this makes sense to me.
I HATE the 12" wide waterfall of Tranny fluid that waterfalls on ya when you have to drain the stock pans... you do it once and vow to never put the stock pan back on
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Old 11-20-2015, 11:30 AM   #1416
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Steve,
Thanks for the link for the trans pan, this is what i was looking for
still 113.-
Derale Performance Transmission Pan GM Turbo 400 Deep 3 Qt 8 oz 14202 | eBay
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Old 11-20-2015, 12:14 PM   #1417
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Interesting looking cooling vents!

I think I'll add that to my list of wants. Since my transmission has never had fluid it it and it's sat for 8 years now I plan on pulling the pan to make sure it's still new in side. Perfect time to swap pans.

Thanks!
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Old 11-20-2015, 02:21 PM   #1418
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Pleased to help Guys!

I did hear that these pans were susceptible to leaks in the early days, but they changed the production and it was cured.
Also, I read that they are difficult to clean debris out of if you need to...

I don't have a external cooler fitted yet, so a little extra cooling and fluid capacity will be just fine.

Also consider this type of cast pan by B & M...
B&M Transmission Cast Deep Pan, Brushed Finish - GM TH400 Transmission » B&M

They are about $140 on ebay.
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Old 11-20-2015, 03:49 PM   #1419
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I think I like the first one better as it has a port for a temperature probe. Like you I plan on having a transmission oil temperature gauge in my dash so the Derale pan fits the bill.

Besides, I don't plan on having any debris in my oil pan
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Old 11-20-2015, 04:22 PM   #1420
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Quote:
Originally Posted by Keyair View Post
..
I HATE the 12" wide waterfall of Tranny fluid that waterfalls on ya when you have to drain the stock pans... you do it once and vow to never put the stock pan back on
I have been on that side of fence and felt pretty stupid to boot.
Mine does have a sending unit fitting that leaks and i am afraid to continue to tighten it, since there is something "spongy" about it. At least it will serve as a drain plug
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Old 11-20-2015, 04:51 PM   #1421
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Yes Brad, Transmission temp gauges rock!

Peter, that extra hole will only likely become active 500 miles from home, at night, in a storm, in some desolate place, with no cell coverage...
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Old 11-20-2015, 05:03 PM   #1422
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Here the matching trans temp gauge I found on Ebay a couple of years back.
I hope the sender is the right size!

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Old 11-20-2015, 05:19 PM   #1423
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I've got the same gauge but don't have a sending unit. How much do you want for the sending unit?
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Old 11-21-2015, 08:58 PM   #1424
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Quote:
Originally Posted by bkahler View Post
I've got the same gauge but don't have a sending unit. How much do you want for the sending unit?
Brad, I had a brain fart and could not remember the make of gauges we have....
Had to sift thru 40 pages of my own thread to find it!

Teleflex!

Armed with that, I found this, which looks just like the one I was sent with my gauge.
Boat Water Oil Temp Sending Unit Sender Single Faria Teleflex Gauge 240 Degree | eBay

But if you search 1/8th NPT oil temp sender, you find thigs like this, that should work, and is cheaper.
Water Oil Temp Temperature 1 8 NPT Electrical Sender Sending Sensor Unit | eBay
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Old 11-22-2015, 05:14 AM   #1425
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Quote:
Originally Posted by Keyair View Post
Brad, I had a brain fart and could not remember the make of gauges we have....
Had to sift thru 40 pages of my own thread to find it!

Teleflex!
Yep and I've got boxes full of the various Teleflex gauges

Quote:
Armed with that, I found this, which looks just like the one I was sent with my gauge.
Boat Water Oil Temp Sending Unit Sender Single Faria Teleflex Gauge 240 Degree | eBay
The problem with this sending unit is its for 120-240 degree and the oil temp gauges are 160-320 degree.

Does your sender have a letter on it? From what I've read it seems the transmitters have ranges and each range is assigned a letter.

Quote:
But if you search 1/8th NPT oil temp sender, you find thigs like this, that should work, and is cheaper.
Water Oil Temp Temperature 1 8 NPT Electrical Sender Sending Sensor Unit | eBay
Again, not knowing what the range is I'd be leery of buying this one.

I've experimented with a few senders trying to find the correct match for the engine coolant transmitter with minimal success. I tried calling Teleflex (owned by some other company now) and they weren't a lot of help.

I found one source that may have the transmitters and I'm going to call them Monday morning.

Brad
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Old 11-22-2015, 07:05 AM   #1426
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OK, got it. I will find the gauge sender and see what is stamped on it.
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Old 11-22-2015, 10:49 AM   #1427
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Brad,
If you are correct about the different range sender unit needed, then this place has us covered...
R8959: Temperature Sender: 140-320F - 1/8 NPTF - Stud , by ISSPRO - eGauges.com

Only thing I noticed is it states that it is a NPFT thread... which is diffent to the Derale threaded hole I think.
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Old 11-22-2015, 12:27 PM   #1428
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If anyone wants a matching Teleflex transmission temp gauge...

Teleflex Transmission Oil Temperature Gauge 50760029 | eBay
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