GMC stuff

[dave posey]

Lurker info & intro: Hello, I'm Dave Posey, 56, former full time trucker,
retired Air Force Air Traffic Controller, full time RV person wannabe but
can't convince wife, and now looking for something to bring in enough
income to support GMC addiction, new to PC's since late summer of 99, and
VERY appreciative of this GMC net. In considering what to do first to
reduce heat in the stock engine/tranx/ compartment of my coach without doing
expensive modifications that I've seen discussed here, all synthetics were
chosen as the answer. The engine oil was changed out about 750 miles ago and
though it might be just wishful thinking-seems to me that gas mileage has
improved slightly, oil consumption has decreased slightly and heat coming up
through the floor has diminished too. Of course these perceptions could only
be the influence of a change of season, we will wait and see. Anyway,
because I wanted to change tranny fluids over to synthetics also, I almost
bought into locally advertised machines that suck out the old and push in
the new for around $100 using customer provided fluid, gasket and filter.
This method also wastes a few pints of new fluid in the process according to
the tranny shop guy. I asked another local shop guy that would do it the
old fashioned way and he said $45 and 2 hours, again, customer provides
fluid, gasket, filter. In mulling over these 2 deals I get to thinking
maybe this is on Gene Fishers site and I could be walked thru the process
step by step but after a thorough search, can't find what I need there.
Now to the bottom line of this post: Any advise, comments or suggestions
from my fellow netters on this? Can I do it in my driveway with marginal to
poor mechanical skills? But I have a good attitude and fairly nice winter
weather here in the Golden state. Thanks for your help. Dave, 76PB, CA

 

[bdub]

Pleased to meet you Dave

I took this from the GMC FAQ at:
http://www.web-access.net/~bmassey/

How do I flush my transmission to completely change the oil?

One method to change all the Trans fluid when changing to Synthetic is :
Change fluid and filter,refil, loosen the cooling line that goes to the
Radiator cooler (you might want to place a rubber hose over the end to
divert to a drain pan), start the engine. The fluid will be pumped from the
Transmission and the Torque Conv. into the pan. You do this slowly starting
and stopping and adding more fluid as you pump out the old. The amount of
fluid you pump into the pan should be the difference between "refill after
change, and refill after overhaul" as stated in the GMC Manual. (5 - 14
quarts). When complete reconnect, and check level. This method was used by
me for my shop customers when changing to B&M Trickshift (easier because it
was Blue in color). (Mark - hemogoblin 12-17-99)

hth

bdub
76 Palm Beach

>Lurker info & intro: Hello, I'm Dave Posey, 56, former full time trucker,
>retired Air Force Air Traffic Controller, full time RV person wannabe but
>can't convince wife, and now looking for something to bring in enough
>income to support GMC addiction, new to PC's since late summer of 99, and
>VERY appreciative of this GMC net. In considering what to do first to
>reduce heat in the stock engine/tranx/ compartment of my coach without doing
>expensive modifications that I've seen discussed here, all synthetics were
>chosen as the answer. The engine oil was changed out about 750 miles ago and
>though it might be just wishful thinking-seems to me that gas mileage has
>improved slightly, oil consumption has decreased slightly and heat coming up
>through the floor has diminished too. Of course these perceptions could only
>be the influence of a change of season, we will wait and see. Anyway,
>because I wanted to change tranny fluids over to synthetics also, I almost
>bought into locally advertised machines that suck out the old and push in
>the new for around $100 using customer provided fluid, gasket and filter.
>This method also wastes a few pints of new fluid in the process according to
>the tranny shop guy. I asked another local shop guy that would do it the
>old fashioned way and he said $45 and 2 hours, again, customer provides
>fluid, gasket, filter. In mulling over these 2 deals I get to thinking
>maybe this is on Gene Fishers site and I could be walked thru the process
>step by step but after a thorough search, can't find what I need there.
>Now to the bottom line of this post: Any advise, comments or suggestions
>from my fellow netters on this? Can I do it in my driveway with marginal to
>poor mechanical skills? But I have a good attitude and fairly nice winter
>weather here in the Golden state. Thanks for your help. Dave, 76PB, CA