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| Re: Caddy 500 torque converter [message #246552 is a reply to message #246540] |
Sun, 06 April 2014 14:56   |
jim kanomata
Messages: 257
Registered: March 2007
Location: fremont,ca
Karma: 12
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Senior Member |
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They are close enough.
If driven in town frequently, then one needs to do some searching.
Jim Kanomata
Applied/GMC, Fremont,CA
jimk@appliedairfilters.com
http://www.appliedgmc.com
1-800-752-7502
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| Re: Caddy 500 torque converter [message #246560 is a reply to message #246534] |
Sun, 06 April 2014 16:08 |
winter
Messages: 247
Registered: September 2007
Location: MPLS MN
Karma: 0
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Senior Member |
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| Larry wrote on Sun, 06 April 2014 08:57 |
Yes, that TC is interchangeable and will work with the Cad 500. However, the stall may not be right for the 500. While you have it out, I'd send your TC to Midwest Torque Converter in St. Paul Mn. for rebuilding. Tell them what engine it will be in, and that it will be in a 12,000 lb vehicle. They will also need to know the HP and Torque curve of the Cad 500. They will then build the TC to optimize those specs. JWID
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Larry,
Do know what stall speed is best? I would guess some where @ 2000 rpm or less with a 500.
I thought I read at one point the stock tc is @ 2600 with the 403 or 455.
Jerrod Winter
1977 Palm Beach
Green Jelly Bean
Twin Cities, Minnesota
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| Re: [GMCnet] Caddy 500 torque converter [message #246562 is a reply to message #246534] |
Sun, 06 April 2014 17:17 |
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USAussie
Messages: 15912
Registered: July 2007
Location: Sydney, Australia
Karma: 6
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Senior Member |
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Larry,
For some reason I can't seem to find my folder on Midwest that has all the correspondence I had with them but IIRC didn't they want
the weight of the GMC and final drive ratio as well?
Midwest Performance Converter
4225 Hiawatha Ave
Minneapolis, MN 55406
612-724-3004
http://www.midwestconverter.com/
Regards,
Rob M.
Sydney, Australia
AUS '75 Avion - The Blue Streak TZE365V100428
USA '75 Avion - Double Trouble TZE365V100426
-----Original Message-----
From: gmclist-bounces@temp.gmcnet.org [mailto:gmclist-bounces@temp.gmcnet.org] On Behalf Of Larry
Sent: Sunday, April 06, 2014 11:57 PM
To: gmclist@temp.gmcnet.org
Subject: Re: [GMCnet] Caddy 500 torque converter
Yes, that TC is interchangeable and will work with the Cad 500. However, the stall may not be right for the 500. While you have it
out, I'd send your TC to Midwest Torque Converter in St. Paul Mn. for rebuilding. Tell them what engine it will be in, and that it
will be in a 12,000 lb vehicle. They will also need to know the HP and Torque curve of the Cad 500. They will then build the TC to
optimize those specs. JWID
--
Larry :)
78 Royale w/500 Caddy
Menomonie, WI.
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Regards,
Rob M. (USAussie)
The Pedantic Mechanic
Sydney, Australia
'75 Avion - AUS - The Blue Streak TZE365V100428
'75 Avion - USA - Double Trouble TZE365V100426
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| Re: Caddy 500 torque converter [message #246567 is a reply to message #246560] |
Sun, 06 April 2014 18:58 |
Bob de Kruyff
Messages: 4260
Registered: January 2004
Location: Chandler, AZ
Karma: 1
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| winter wrote on Sun, 06 April 2014 15:08 |
| Larry wrote on Sun, 06 April 2014 08:57 |
Yes, that TC is interchangeable and will work with the Cad 500. However, the stall may not be right for the 500. While you have it out, I'd send your TC to Midwest Torque Converter in St. Paul Mn. for rebuilding. Tell them what engine it will be in, and that it will be in a 12,000 lb vehicle. They will also need to know the HP and Torque curve of the Cad 500. They will then build the TC to optimize those specs. JWID
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Larry,
Do know what stall speed is best? I would guess some where @ 2000 rpm or less with a 500.
I thought I read at one point the stock tc is @ 2600 with the 403 or 455.
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Stall speed is only one of several measures. You also need to think about stall ratio which is an indication of the torque multiplication. I suspect the real trail of correct torque converters has been lost. Even if it fits, the diameter and all of its performance characteristics can be wrong. That's the danger of going on your own and making major non original changes.
Bob de Kruyff
78 Eleganza
Chandler, AZ
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| Re: [GMCnet] Caddy 500 torque converter [message #246616 is a reply to message #246605] |
Mon, 07 April 2014 07:11 |
Ken Henderson
Messages: 8726
Registered: March 2004
Location: Americus, GA
Karma: 9
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Senior Member |
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Don,
When I installed my first Cad500, totally rebuilt, I used the hd converter
I'd installed on the 455 some years before. After 4000 miles, it cracked
around one of the mounting lugs -- nothing to do with the Cad. I then had
a 47 years in business local rebuilder do me a torque converter -- a
"school bus" version with all the bells & whistles, according to them.
After 2000 miles, I found the crankshaft had 0.120" end play (up from
about 0.004"). There WAS adequate end play for the the TC when I installed
it. After having the crank rebuilt, I reinstalled it with 0.004" end play.
365 miles later it had 0.060" end play! What th'...???
In frustration, I rebuilt and installed a different 500 and a NOS Manny
Tranny specially built for me. For a torque converter I contacted Midwest
Converters, as others have suggested. IIRC, they proposed a 1200 rpm stall
speed. I haven't checked it, but it doesn't seem that high to me. I've
got close to 20,000 miles on it now with no problems.
As for the locally built TC, I talked to the owner of the company a couple
of months ago. We're agreed that I'll take to him for teardown. I'm
reasonably confident that he'll give me an honest appraisal of whether it
somehow caused my.
Ken H.
Americus, GA
'76 X-Birchaven w/Cad500/Howell EFI & EBL,
Manny Brakes & 1-Ton, etc., etc.
www.gmcwipersetc.com
On Sun, Apr 6, 2014 at 11:36 PM, Dan Borlase <bord@shaw.ca> wrote:
>
>
> So then my question has to put to the boys that have actually done the 500
> swap...chime in her lads...did you use your existing TQ's (403/455) or...
> _______________________________________________
>
>
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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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