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Re: [GMCnet] Reviving the Cad 500 [message #163628 is a reply to message #163626] Tue, 20 March 2012 12:29 Go to previous messageGo to previous message
Ken Henderson is currently offline  Ken Henderson   United States
Messages: 8726
Registered: March 2004
Location: Americus, GA
Karma:
Senior Member
Bob,

The transmission was in the new front clip I installed a few years ago,
behind the 455 I replaced with the 500. It was rebuilt by a reputable shop
in Nashville -- before I put maybe 20,000 miles on it. The removed 455 is
still in my shop on an engine stand, so yesterday I checked end play on its
crank -- imperceptible without putting a gauge on it. So, IF the
transmission has a problem, it's probably arisen during the 11,000 miles
since I installed the 500. Which is not unreasonable, considering what
happened to the thrust bearing this time in <300 miles. If the situation
was as bad when I installed the 500, it certainly wouldn't have lasted as
long as it did before the first failure.

This morning I dug through my stuff and found a couple of 160 psi pressure
gauges. When I decide to get greasy again, I'll connect one of those to
the 425's service port and tee the other into the converter output to the
cooler. It's not going to do much more damage to the engine than is
already done while I check those pressures.

Ken H.


On Tue, Mar 20, 2012 at 12:38 PM, Bob de Kruyff wrote:

>
>
> ""Y'All keep coming up with new ideas -- I'm desperate! No way I'm going to
> put another engine, of any kind, ahead of that transmission until I'm
> pretty darned sure I know what's caused the problems.
>
> Ken H.
>
> ""
>
> Ken, the process of eleimination sure points to the trans/converter. I've
> lost track of the history of that transmission. Did you ever have it behind
> a different engine or was it all mated at the same time? If it came from a
> different GMC, do you know any of that history?
> --
>
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Ken Henderson
Americus, GA
www.gmcwipersetc.com
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