trans temp / ext filter

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May 8, 2014 | 06:44 AM

#16

Liquid10Rider

Thread Starter

More Turbo

Joined: Apr 2009

Posts: 712

Likes: 1

Hey guys I'm sorry for such a delay on this response but I called Bob from dieselsite who helped me out big time. I explained what was going on and he was running through a few things with me and than he said it could be the external bypass valve on the cooler lines failed and now the fluid is not circulating into the cooler it's just going out and back in to the trans. So I picked one up at my local dealer changed it out and she's back to normal temps. Thank you again for everyone's hero and thank you to Bob for taking my call later that night and helping me out with the problem.

AJ

May 8, 2014 | 07:43 AM

#17

HKusp

Lead Driver

Joined: Jun 2007

Posts: 7,760

Likes: 27

From: Hampton, Maryland.

Thanks for reporting back. Good stuff.

May 8, 2014 | 08:52 AM

#18

mueckster

Lead Driver

Joined: Jun 2003

Posts: 8,298

Likes: 25

From: Damon (South East Texas)

I have had good luck rebuilding the pressure bypass tube with the Sonnax kit. http://www.sonnax.com/parts/2078 I followed the instructions and vacuum tested it to check the seal.

May 8, 2014 | 01:18 PM

#19

SpringerPop

Hotshot

Joined: Jan 2002

Posts: 17,988

Likes: 207

From: La La Land

Yup, Roland. I'll bet that $13 for the rebuild kid (not to mention the subsequent higher reliability of a Sonnax part) was much cheaper than a complete bypass assembly.

Knowledge is power.

Pop

May 8, 2014 | 03:21 PM

#20

Bonanza35

Lead Driver

Joined: Sep 2005

Posts: 9,399

Likes: 188

From: Norco,CA

But was the outside temp the same as it was before he changed the valve? An another question, what is the max temp of this fluid before we have to worry when towing? I was thinking 250 for a short time, is that correct? My son asked me and I wasn't sure.

May 8, 2014 | 06:05 PM

#21

trekbasso

Fleet Mechanic

Joined: Dec 2010

Posts: 1,546

Likes: 9

From: Wellington, Co

IIRC 250* isn't deadly, depends more on how long it stays that hot. Plus I would question why it's running that hot. Mine last summer towing a 12k lb 5th wheel stayed around 190ish, never over 210.

Thanks for the tip on the Sonnax parts Roland. Good to know.

May 8, 2014 | 06:43 PM

#22

Bonanza35

Lead Driver

Joined: Sep 2005

Posts: 9,399

Likes: 188

From: Norco,CA

My trans runs cool also. But the son with his 5R110 in his 04 6.0L and was asking me because he tows 15 to 16K threw the desert and up the pass. He runs synthetic fluid but he got a scan guage this year and was going to watch it and see where it goes. His can get around 210 in the heat just around town.

May 8, 2014 | 08:23 PM

#23

Mark Kovalsky

Frmr Ford Trans Engr

Joined: Aug 1999

Posts: 24,714

Likes: 2,640

From: SE Florida

The 5R110 will not run as cool as the older transmissions. It has a thermostat that only allows 10% of the normal flow to the coolers when the trans is below 165°F.