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Re: [GMCnet] Reviving the Cad 500 [message #163535 is a reply to message #163524]

Mon, 19 March 2012 14:39

Ken Henderson

Messages: 8726
Registered: March 2004
Location: Americus, GA

Karma:

Senior Member

Ken H.
Americus, GA
'76 X-Birchaven w/Cad500/Howell EFI+ & EBL
www.gmcwipersetc.com

Ed,

Rob's not the one with the Cad500 problem -- I, Ken H., am the victim.

Thanks for your input. Unfortunately, there's nothing new there to help
me. I'd read all that sort of information even before I rebuilt the Cad
11,000 miles ago. And studied it all again before this latest repair.
None of that is, per se, applicable: I have only a nearly-new aluminum
radiator with ATF cooler as external cooling. And that's connected with
3/8" lines rather than the OEM 5/16". Additional cooling comes from a
transmission pan having cooling tubes for air flow -- NO hydraulic
restriction there nor anywhere else in the system.

That's not to say the transmission hydraulic pressure isn't high. In fact,
my current, unsubstantiated, opinion is that it's exactly the problem.
IMHO, there's just no other possible source of sufficient force to cause
such a rapid failure.

My intention now is that, when I finally feel like getting greasy again,
I'll put gauges on the service port and the converter outlet. Then I'll
abuse the still well running engine a little longer to see what those
pressures are.

Thanks again,

Ken H.

On Mon, Mar 19, 2012 at 12:45 PM, Ed Jarmul wrote:

> Rob, I feel your pain and have to weigh in on this one with a short excerpt
> from a recent Internet search since I have a 500 in my 75 Cadillac and
> "bullet proof" Turbo 400 as well.
>
>
>
> 1. You want the radiator heat exchanger to be the last thing in the
> hydraulic circuit before the fluid is returned to the transmission. If you
> add an external fluid cooler (a really good idea), place it before the heat
> exchanger so that the radiator heat exchanger has the "last word".
>
> 2. Keep the restriction in any cooler low. Since a high volume of oil
> flows in this circuit at times, you need low restriction to avoid having
> pressure build up in the torque converter. That pressure buildup is bad for
> a lot of things, including the engine's thrust bearing, the torque
> converter, and the various bearings and washers in the transmission which
> handle the axial thrust load. In a really bad case, excess converter
> pressure can crack a transmission case.
>
> 3. Do not block the hydraulic lines in any manner. This includes
> thermostats and shutoff valves. Blocking the fluid flow not only results in
> very high converter and line pressures, it also causes a lack of
> lubrication
> inside the transmission which will quickly lead to transmission failure.
>
> This article deals mostly with adding an extra transmission cooler but the
> pressure buildup due to a restriction/converter issue can be extreme
> causing
> engine trust bearing failures.
>
> Just a thought and I have the complete article if interested in ideas for
> controlling fluid temperatures, the killer of any automatic transmission.
>
>
>
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Ken Henderson
Americus, GA
www.gmcwipersetc.com
Large Wiring Diagrams
76 X-Birchaven
76 X-Palm Beach

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[Message index]

		[GMCnet] Reviving the Cad 500 By: Ken Henderson on Mon, 12 March 2012 21:11
		Re: [GMCnet] Reviving the Cad 500 By: Dennis S on Mon, 12 March 2012 21:51
		Re: [GMCnet] Reviving the Cad 500 By: jhbridges on Tue, 13 March 2012 07:44
		Re: [GMCnet] Reviving the Cad 500 By: Kosier on Mon, 12 March 2012 22:05
		Re: [GMCnet] Reviving the Cad 500 By: sgltrac on Mon, 12 March 2012 23:42
		Re: [GMCnet] Reviving the Cad 500 By: ljdavick on Mon, 12 March 2012 23:51
		Re: [GMCnet] Reviving the Cad 500 By: Matt Colie on Tue, 13 March 2012 06:55
		Re: [GMCnet] Reviving the Cad 500 By: Ken Henderson on Tue, 13 March 2012 07:08
		Re: [GMCnet] Reviving the Cad 500 By: jhbridges on Tue, 13 March 2012 08:02
		Re: [GMCnet] Reviving the Cad 500 By: Larry on Tue, 13 March 2012 09:23
		Re: [GMCnet] Reviving the Cad 500 By: Ken Henderson on Tue, 13 March 2012 12:05
		Re: [GMCnet] Reviving the Cad 500 By: Larry on Tue, 13 March 2012 12:58
		Re: [GMCnet] Reviving the Cad 500 By: Ken Henderson on Tue, 13 March 2012 18:15
		Re: [GMCnet] Reviving the Cad 500 By: Larry on Tue, 13 March 2012 18:58
		Re: [GMCnet] Reviving the Cad 500 By: jhbridges on Tue, 13 March 2012 19:14
		Re: [GMCnet] Reviving the Cad 500 By: Ken Henderson on Tue, 13 March 2012 19:34
		Re: [GMCnet] Reviving the Cad 500 By: jimk on Wed, 14 March 2012 01:23
		Re: [GMCnet] Reviving the Cad 500 By: Ken Henderson on Wed, 14 March 2012 07:28
		Re: [GMCnet] Reviving the Cad 500 By: Ken Henderson on Wed, 14 March 2012 21:29
		Re: [GMCnet] Reviving the Cad 500 By: jimk on Thu, 15 March 2012 01:22
		Re: [GMCnet] Reviving the Cad 500 By: USAussie on Thu, 15 March 2012 08:43
		Re: [GMCnet] Reviving the Cad 500 By: k2gkk on Thu, 15 March 2012 11:53
		Re: [GMCnet] Reviving the Cad 500 By: Ken Henderson on Thu, 15 March 2012 21:15
		Re: [GMCnet] Reviving the Cad 500 By: Steve L. Clevenger on Fri, 16 March 2012 00:15
		Re: [GMCnet] Reviving the Cad 500 By: jimk on Fri, 16 March 2012 01:30
		Re: [GMCnet] Reviving the Cad 500 By: USAussie on Fri, 16 March 2012 10:09
		Re: [GMCnet] Reviving the Cad 500 By: ljdavick on Fri, 16 March 2012 01:37
		Re: [GMCnet] Reviving the Cad 500 By: jhbridges on Thu, 15 March 2012 06:04
		Re: [GMCnet] Reviving the Cad 500 By: Larry on Fri, 16 March 2012 07:54
		Re: [GMCnet] Reviving the Cad 500 By: Ken Henderson on Fri, 16 March 2012 08:14
		Re: [GMCnet] Reviving the Cad 500 By: Ken Burton on Sat, 17 March 2012 18:46
		Re: [GMCnet] Reviving the Cad 500 By: Bob de Kruyff on Sat, 17 March 2012 19:24
		Re: [GMCnet] Reviving the Cad 500 By: Ken Burton on Sat, 17 March 2012 19:31
		Re: [GMCnet] Reviving the Cad 500 By: Matt Colie on Sun, 18 March 2012 08:55
		Re: [GMCnet] Reviving the Cad 500 By: Ken Henderson on Sun, 18 March 2012 20:31
		Re: [GMCnet] Reviving the Cad 500 By: Bob de Kruyff on Sun, 18 March 2012 20:51
		Re: [GMCnet] Reviving the Cad 500 By: Kosier on Sun, 18 March 2012 21:16
		Re: [GMCnet] Reviving the Cad 500 By: midlf on Sun, 18 March 2012 22:09
		Re: [GMCnet] Reviving the Cad 500 By: USAussie on Sun, 18 March 2012 22:04
		Re: [GMCnet] Reviving the Cad 500 By: James Hupy on Sun, 18 March 2012 22:27
		Re: [GMCnet] Reviving the Cad 500 By: Marsh Wilkes on Sun, 18 March 2012 22:18
		Re: [GMCnet] Reviving the Cad 500 By: Ken Burton on Sun, 18 March 2012 23:35
		Re: [GMCnet] Reviving the Cad 500 By: ljdavick on Mon, 19 March 2012 01:05
		Re: [GMCnet] Reviving the Cad 500 By: USAussie on Mon, 19 March 2012 06:54
		Re: [GMCnet] Reviving the Cad 500 By: jhbridges on Mon, 19 March 2012 06:50
		Re: [GMCnet] Reviving the Cad 500 By: USAussie on Mon, 19 March 2012 07:05
		Re: [GMCnet] Reviving the Cad 500 By: jhbridges on Mon, 19 March 2012 07:22
		Re: [GMCnet] Reviving the Cad 500 By: James Hupy on Mon, 19 March 2012 10:01
		Re: [GMCnet] Reviving the Cad 500 By: Steven Ferguson on Tue, 20 March 2012 07:16
		Re: [GMCnet] Reviving the Cad 500 By: Ken Henderson on Tue, 20 March 2012 08:54
		Re: [GMCnet] Reviving the Cad 500 By: Bob de Kruyff on Tue, 20 March 2012 11:38
		Re: [GMCnet] Reviving the Cad 500 By: Ken Henderson on Tue, 20 March 2012 12:29
		Re: [GMCnet] Reviving the Cad 500 By: GMC Cruse on Sat, 24 March 2012 11:09
		Re: [GMCnet] Reviving the Cad 500 By: Dennis S on Sat, 24 March 2012 15:32
		Re: [GMCnet] Reviving the Cad 500 By: Ken Henderson on Sat, 24 March 2012 21:09
		Re: [GMCnet] Reviving the Cad 500 By: Dennis S on Sat, 24 March 2012 22:45
		Re: [GMCnet] Reviving the Cad 500 By: Steven Ferguson on Sun, 25 March 2012 07:00
		Re: [GMCnet] Reviving the Cad 500 By: Ken Henderson on Sat, 24 March 2012 20:19
		Re: [GMCnet] Reviving the Cad 500 By: Matt Colie on Mon, 19 March 2012 08:02
		Re: [GMCnet] Reviving the Cad 500 By: Bob de Kruyff on Mon, 19 March 2012 09:56
		Re: [GMCnet] Reviving the Cad 500 By: Carl S. on Mon, 19 March 2012 13:08
		Re: [GMCnet] Reviving the Cad 500 By: George Beckman on Sat, 24 March 2012 18:05
		Re: [GMCnet] Reviving the Cad 500 By: Dolph Santorine on Sat, 24 March 2012 18:25
		Re: [GMCnet] Reviving the Cad 500 By: Ken Henderson on Sat, 24 March 2012 21:21
		Re: [GMCnet] Reviving the Cad 500 By: Ken Henderson on Sat, 24 March 2012 21:17
		Re: [GMCnet] Reviving the Cad 500 By: GMC_LES on Mon, 26 March 2012 20:55
		Re: [GMCnet] Reviving the Cad 500 By: GMC_LES on Tue, 27 March 2012 07:37
		Re: [GMCnet] Reviving the Cad 500 By: Ken Henderson on Tue, 27 March 2012 14:12
		Re: [GMCnet] Reviving the Cad 500 By: Mr ERFisher on Tue, 27 March 2012 14:14
		Re: [GMCnet] Reviving the Cad 500 By: Ken Henderson on Tue, 27 March 2012 14:21
		Re: [GMCnet] Reviving the Cad 500 By: jhbridges on Tue, 27 March 2012 19:34
		Re: [GMCnet] Reviving the Cad 500 By: Ken Henderson on Tue, 27 March 2012 21:20
		Re: [GMCnet] Reviving the Cad 500 By: Steven Ferguson on Wed, 28 March 2012 07:48
		Re: [GMCnet] Reviving the Cad 500 By: Ken Henderson on Thu, 29 March 2012 18:05
		Re: [GMCnet] Reviving the Cad 500 By: jhbridges on Wed, 28 March 2012 08:00
		Re: [GMCnet] Reviving the Cad 500 By: Ken Henderson on Thu, 29 March 2012 18:12
		Re: [GMCnet] Reviving the Cad 500 By: Ken Henderson on Sat, 31 March 2012 18:06
		Re: [GMCnet] Reviving the Cad 500 By: shawnee on Sat, 31 March 2012 20:11
		Re: [GMCnet] Reviving the Cad 500 By: Ken Henderson on Sat, 31 March 2012 20:19
		Re: [GMCnet] Reviving the Cad 500 By: GMC_LES on Mon, 02 April 2012 18:28
		Re: [GMCnet] Reviving the Cad 500 By: Dennis S on Mon, 02 April 2012 18:43
		Re: [GMCnet] Reviving the Cad 500 By: Ken Henderson on Mon, 02 April 2012 18:54
		Re: [GMCnet] Reviving the Cad 500 By: roy1 on Tue, 03 April 2012 11:15
		Re: [GMCnet] Reviving the Cad 500 By: Ken Henderson on Mon, 02 April 2012 18:51
		Re: [GMCnet] Reviving the Cad 500 By: Carleton Douglas[1] on Tue, 03 April 2012 08:11
		Re: [GMCnet] Reviving the Cad 500 By: Ken Henderson on Tue, 03 April 2012 19:18
		Re: [GMCnet] Reviving the Cad 500 By: Larry on Tue, 03 April 2012 16:14
		Re: [GMCnet] Reviving the Cad 500 By: Ken Henderson on Tue, 03 April 2012 19:36
		Re: [GMCnet] Reviving the Cad 500 By: GMC_LES on Wed, 04 April 2012 16:34
		Re: [GMCnet] Reviving the Cad 500 By: Ken Henderson on Sat, 17 March 2012 19:40
		Re: [GMCnet] Reviving the Cad 500 By: ljdavick on Sat, 17 March 2012 20:15
		Re: [GMCnet] Reviving the Cad 500 By: Ken Henderson on Sun, 18 March 2012 07:49
		Re: [GMCnet] Reviving the Cad 500 By: Kosier on Sat, 17 March 2012 20:25
		Re: [GMCnet] Reviving the Cad 500 By: Ken Henderson on Sun, 18 March 2012 07:44
		Re: [GMCnet] Reviving the Cad 500 By: ljdavick on Sun, 18 March 2012 03:44
		Re: [GMCnet] Reviving the Cad 500 By: Ken Henderson on Sun, 18 March 2012 07:42
		Re: [GMCnet] Reviving the Cad 500 By: Ken Henderson on Fri, 16 March 2012 20:39
		Re: [GMCnet] Reviving the Cad 500 By: WD0AFQ on Fri, 16 March 2012 22:33
		Re: [GMCnet] Reviving the Cad 500 By: George Beckman on Sat, 17 March 2012 00:41
		Re: [GMCnet] Reviving the Cad 500 By: Ken Henderson on Sat, 17 March 2012 03:32
		Re: [GMCnet] Reviving the Cad 500 By: James Hupy on Sat, 17 March 2012 10:43
		Re: [GMCnet] Reviving the Cad 500 By: Ken Henderson on Sat, 17 March 2012 18:25
		Re: [GMCnet] Reviving the Cad 500 By: Ernest Dankert on Sat, 17 March 2012 22:48
		Re: [GMCnet] Reviving the Cad 500 By: roy1 on Mon, 19 March 2012 11:12
		Re: [GMCnet] Reviving the Cad 500 By: Dennis S on Mon, 19 March 2012 11:30
		Re: [GMCnet] Reviving the Cad 500 By: Ed Jarmul on Mon, 19 March 2012 11:45
		Re: [GMCnet] Reviving the Cad 500 By: Ken Henderson on Mon, 19 March 2012 14:39
		Re: [GMCnet] Reviving the Cad 500 By: jaholland on Mon, 19 March 2012 18:28
		Re: [GMCnet] Reviving the Cad 500 By: Adrien G. on Mon, 19 March 2012 23:17
		Re: [GMCnet] Reviving the Cad 500 By: Ken Henderson on Tue, 20 March 2012 08:09
		Re: [GMCnet] Reviving the Cad 500 By: Bob de Kruyff on Wed, 28 March 2012 09:46
		Re: [GMCnet] Reviving the Cad 500 By: Ken Henderson on Wed, 28 March 2012 13:51
		Re: [GMCnet] Reviving the Cad 500 By: Matt Colie on Wed, 28 March 2012 19:58
		Re: [GMCnet] Reviving the Cad 500 By: klassic kampers on Wed, 28 March 2012 20:19
		Re: [GMCnet] Reviving the Cad 500 By: Bob de Kruyff on Wed, 28 March 2012 22:10
		Re: [GMCnet] Reviving the Cad 500 By: rssbob on Wed, 28 March 2012 22:14
		Re: [GMCnet] Reviving the Cad 500 By: Bob de Kruyff on Wed, 28 March 2012 22:37
		Re: [GMCnet] Reviving the Cad 500 By: Steve L. Clevenger on Mon, 19 March 2012 23:36
		Re: [GMCnet] Reviving the Cad 500 By: Richard Brown on Wed, 28 March 2012 01:48
		Re: [GMCnet] Reviving the Cad 500 By: Ken Henderson on Thu, 29 March 2012 18:03
		Re: [GMCnet] Reviving the Cad 500 By: kingd on Sat, 31 March 2012 20:08
		Re: [GMCnet] Reviving the Cad 500 By: Richard Brown on Mon, 02 April 2012 20:21
		Re: [GMCnet] Reviving the Cad 500 By: Ken Henderson on Mon, 02 April 2012 20:42
		Re: [GMCnet] Reviving the Cad 500 By: JohnL455 on Tue, 03 April 2012 19:17
		Re: [GMCnet] Reviving the Cad 500 By: Bob de Kruyff on Tue, 03 April 2012 22:31
		Re: [GMCnet] Reviving the Cad 500 By: Richard Brown on Tue, 03 April 2012 23:36
		Re: [GMCnet] Reviving the Cad 500 By: JohnL455 on Wed, 04 April 2012 09:24
		Re: [GMCnet] Reviving the Cad 500 By: Bob de Kruyff on Wed, 04 April 2012 10:03
		Re: [GMCnet] Reviving the Cad 500 By: Matt Colie on Wed, 04 April 2012 15:38
		Re: [GMCnet] Reviving the Cad 500 By: k2gkk on Wed, 04 April 2012 16:00
		Re: [GMCnet] Reviving the Cad 500 By: Bob de Kruyff on Wed, 04 April 2012 17:20
		Re: [GMCnet] Reviving the Cad 500 By: jhbridges on Wed, 04 April 2012 19:06
		Re: [GMCnet] Reviving the Cad 500 By: JohnL455 on Wed, 04 April 2012 17:28
		Re: [GMCnet] Reviving the Cad 500 By: Matt Colie on Thu, 05 April 2012 09:16
		Re: [GMCnet] Reviving the Cad 500 By: g.winger on Wed, 04 April 2012 19:42
		Re: [GMCnet] Reviving the Cad 500 By: Kosier on Wed, 04 April 2012 20:33
		Re: [GMCnet] Reviving the Cad 500 By: Ken Henderson on Wed, 04 April 2012 21:20
		Re: [GMCnet] Reviving the Cad 500 By: jhbridges on Thu, 05 April 2012 05:26
		Re: [GMCnet] Reviving the Cad 500 By: Ken Henderson on Thu, 05 April 2012 08:21
		Re: [GMCnet] Reviving the Cad 500 By: Dan W on Thu, 05 April 2012 09:08
		Re: [GMCnet] Reviving the Cad 500 By: Bob de Kruyff on Thu, 05 April 2012 12:51
		Re: [GMCnet] Reviving the Cad 500 By: jhbridges on Fri, 06 April 2012 06:52
		Re: [GMCnet] Reviving the Cad 500 By: Steven Ferguson on Thu, 05 April 2012 07:09
		Re: [GMCnet] Reviving the Cad 500 By: Ken Henderson on Thu, 05 April 2012 08:16
		Re: [GMCnet] Reviving the Cad 500 By: jhbridges on Fri, 06 April 2012 06:47
		Re: [GMCnet] Reviving the Cad 500 By: Steven Ferguson on Fri, 06 April 2012 07:45
		Re: [GMCnet] Reviving the Cad 500 By: Ken Henderson on Fri, 06 April 2012 07:56
		Re: [GMCnet] Reviving the Cad 500 By: Richard Brown on Thu, 05 April 2012 03:47
		Re: [GMCnet] Reviving the Cad 500 By: Ken Henderson on Thu, 05 April 2012 08:10
		Re: [GMCnet] Reviving the Cad 500 By: g.winger on Thu, 05 April 2012 05:19
		Re: [GMCnet] Reviving the Cad 500 By: GMC_LES on Thu, 05 April 2012 07:45
		Re: [GMCnet] Reviving the Cad 500 By: Ken Henderson on Thu, 05 April 2012 08:27
		Re: [GMCnet] Reviving the Cad 500 By: Kosier on Thu, 05 April 2012 21:42
		Re: [GMCnet] Reviving the Cad 500 By: John Heslinga on Thu, 05 April 2012 13:19
		Re: [GMCnet] Reviving the Cad 500 By: Ken Henderson on Thu, 05 April 2012 22:16
		Re: [GMCnet] Reviving the Cad 500 By: Marsh Wilkes on Fri, 06 April 2012 08:06
		Re: [GMCnet] Reviving the Cad 500 By: Ken Henderson on Fri, 06 April 2012 08:19
		Re: [GMCnet] Reviving the Cad 500 By: Marsh Wilkes on Fri, 06 April 2012 09:05

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