[Shotimes] Rod Bearing Change @190K miles

[Donald Mallinson]

Ron,

The damaging part of lugging an engine is big throttle openings at very 
low speeds in high gears.  Unless the transmission is just 
malfunctioning, there just isn't any way to do this.

OF course it is possible to have low speeds at low rpm's, but there is 
no throttle opening.

I really don't want to get into another long argument but I am 100% 
positive that what we traditionally call lugging is just not possible at 
all with an automatic.  Your statement proves it actually, you say they 
don't use enough throttle pressure.  Right there it is.  Without big 
throttle openings or at least beyond idling, it really isn't possible to 
lug an automatic.  Plus at very low speeds, any normal transmission will 
downshift.

Don Mallinson

Ron Porter wrote:

>Don, you are wrong.....
>
>It is NOT impossible to lug an ATX, and (unfortunately) I have talked to,
>and ridden with, SHO owners who do just that.
>
>As hard as it is to believe, there are SHO owners who don't use enough
>throttle pressure to unlock the TC, or to downshift.
>
>FWIW, if "I Were King", I would rescind there SHO ownership but in our
>democratic society, there are folks who own SHOs and are clueless.
>
>Ron Porter
>
>-----Original Message-----
>From: shotimes-admin@autox.team.net [mailto:shotimes-admin@autox.team.net]
>On Behalf Of Donald Mallinson
>Sent: Tuesday, January 31, 2006 4:49 PM
>To: shotimes@autox.team.net
>Subject: Re: [Shotimes] Rod Bearing Change @190K miles
>
>Unless they modify the transmission is it impossible to lug an automatic 
>like you can a manual trans.  Anything approaching a true lug down of 
>the engine will result in a downshift, and in fact the tranny will go to 
>a lower gear well before any lugging can happen. 
>
>Any true low rpm action with an automatic is at idle or near that, not 
>the rather large throttle positions that an MTX in high gear at 10-15 
>mph can cause and the severe lugging and damage that can result.
>
>Don Mallinson
>
>Ron Porter wrote:
>
>  
>
>>As hard as it is to believe, there are SHO drivers with featherfeet who can
>>lug an ATX.
>>
>>Ron Porter
>>
>>-----Original Message-----
>>From: shotimes-admin@autox.team.net [mailto:shotimes-admin@autox.team.net]
>>On Behalf Of bjshov8@comcast.net
>>Sent: Tuesday, January 31, 2006 11:04 AM
>>To: shotimes@autox.team.net
>>Subject: Re: [Shotimes] Rod Bearing Change @190K miles
>>
>>There has been speculation that the ATX does not allow the engine to "lug",
>>and therefore reduces wear on the bearings.  With an MTX you can run the
>>engine under load at real low rpm's which is what is theoretically bad for
>>the bearings.
>>
>>
>> 
>>
>>    
>>
>>>Just changed the connecting rod bearings at 190K miles on my wife's 1993
>>>   
>>>
>>>      
>>>
>>ATX.
>> 
>>
>>    
>>
>>>I think it was a waste of time! The bearings had very little wear. I just
>>>could not believe how clean the engine is! Only had a small oval patch of
>>>copper showing, maybe 1.5 or 2 inches long. Not even all the way across
>>>   
>>>
>>>      
>>>
>>the
>> 
>>
>>    
>>
>>>bearing shell. We have had this car since 78K miles and have only used
>>>   
>>>
>>>      
>>>
>>Mobil 1
>> 
>>
>>    
>>
>>>synthetic oil, changed at 5K intervals. The new rod bearings checked with
>>>plastiguage were right in the middle of the factory clearance range.
>>>Maybe the ATX SHO's can go without changing the rod bearings? Even up to
>>>   
>>>
>>>      
>>>
>>and
>> 
>>
>>    
>>
>>>over 200K miles?
>>>   
>>>
>>>      
>>>
>>_______________________________________________
>>Shotimes mailing list
>>Shotimes@autox.team.net
>>http://www.team.net/mailman/listinfo/shotimes
>>_______________________________________________
>>Shotimes mailing list
>>Shotimes@autox.team.net
>>http://www.team.net/mailman/listinfo/shotimes
>>
>>
>>.
>>    
>>
>_______________________________________________
>Shotimes mailing list
>Shotimes@autox.team.net
>http://www.team.net/mailman/listinfo/shotimes
>
>
>
>
>.