transmission problem

fisherman49 · 10-20-2009, 11:35 PM

I own a 2001 GMC Sierra 2500HD. When I don't drive the truck for about a week, it sometimes does not engage into drive or reverse. I am told that this is caused by oil draining out of the torque converter. I am also told that I need a fluid pump modification to prevent this drain back. My first question is whether there is an easy fix for this (estimate is $1800) and the second is whether or not it is just easier to start my truck up every few days to prevent this drain back.

gmctrucks · 10-21-2009, 12:17 AM

Welcome to the forum and howdy from TEXAS. Sounds like the valve body to me try a can of Seafoam first just read directions and add to trans.

CORRECTION I meant Lucas the stuff is super. Thanks Leo just kidding thanks SHD.

silverhairdeere · 10-21-2009, 06:30 AM

Quote:

Originally Posted by fisherman49

I own a 2001 GMC Sierra 2500HD. When I don't drive the truck for about a week, it sometimes does not engage into drive or reverse. I am told that this is caused by oil draining out of the torque converter. I am also told that I need a fluid pump modification to prevent this drain back. My first question is whether there is an easy fix for this (estimate is $1800) and the second is whether or not it is just easier to start my truck up every few days to prevent this drain back.

even if this were true , when you start the truck , the converter would refill , how many miles on transmission , the smell and color of fluid , last fluid change ,if not lately try that and add lucas transmission additive , i and others on here swear by it

shd

fisherman49 · 10-21-2009, 01:48 PM

I have approx. 60,000 miles on the truck. It has an Allison transmission and when the mechanic looked at the oil, it was red but he noted a slightly "burnt" odor. What does the Lucas transmission treatment actually do to stop this backflow?

silverhairdeere · 10-21-2009, 03:42 PM

changed the fluid and add the lucas , it helps with seals and cleans out the gunk , how do you know the converter is leaking back .

shd

fisherman49 · 10-21-2009, 05:54 PM

The problem with the torque converter was diagnosed by my local GMC dealer. They referenced Bulletin 030730011D.

silverhairdeere · 10-21-2009, 05:57 PM

then there should be a service call back on them , which should be free to you .

shd

fisherman49 · 10-21-2009, 07:51 PM

How do you confirm that GMC needs to repair this problem? Is it suffice that a service bulletin has been issued?

mudseeker · 10-21-2009, 09:04 PM

a TSB is not the same as a recall. dealership is not required to fix this on their dime and the truck out of warrenty makes it even harder to get them to pony up the cash.

10-20-2009, 11:35 PM	#1
fisherman49 Junior Member Join Date: Oct 2009 Posts: 4	transmission problem I own a 2001 GMC Sierra 2500HD. When I don't drive the truck for about a week, it sometimes does not engage into drive or reverse. I am told that this is caused by oil draining out of the torque converter. I am also told that I need a fluid pump modification to prevent this drain back. My first question is whether there is an easy fix for this (estimate is $1800) and the second is whether or not it is just easier to start my truck up every few days to prevent this drain back.

10-21-2009, 12:17 AM	#2
gmctrucks Senior Member Join Date: Nov 2006 Location: Houston,Texas Posts: 4,033	Welcome to the forum and howdy from TEXAS. Sounds like the valve body to me try a can of Seafoam first just read directions and add to trans. CORRECTION I meant Lucas the stuff is super. Thanks Leo just kidding thanks SHD. Last edited by gmctrucks; 10-21-2009 at 12:21 PM. Reason: add and sorry.

10-21-2009, 01:48 PM	#4
fisherman49 Junior Member Join Date: Oct 2009 Posts: 4	transmission I have approx. 60,000 miles on the truck. It has an Allison transmission and when the mechanic looked at the oil, it was red but he noted a slightly "burnt" odor. What does the Lucas transmission treatment actually do to stop this backflow?

10-21-2009, 09:04 PM	#9
mudseeker Senior Moderator Join Date: Feb 2006 Location: michigan Posts: 6,374	a TSB is not the same as a recall. dealership is not required to fix this on their dime and the truck out of warrenty makes it even harder to get them to pony up the cash. __________________ i'd rather be hunting

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10-21-2009, 03:42 PM	#5
silverhairdeere Senior Member Join Date: Feb 2008 Location: land between the lakes tn Posts: 1,184	changed the fluid and add the lucas , it helps with seals and cleans out the gunk , how do you know the converter is leaking back . shd

10-21-2009, 05:54 PM	#6
fisherman49 Junior Member Join Date: Oct 2009 Posts: 4	The problem with the torque converter was diagnosed by my local GMC dealer. They referenced Bulletin 030730011D.

10-21-2009, 05:57 PM	#7
silverhairdeere Senior Member Join Date: Feb 2008 Location: land between the lakes tn Posts: 1,184	then there should be a service call back on them , which should be free to you . shd

10-21-2009, 07:51 PM	#8
fisherman49 Junior Member Join Date: Oct 2009 Posts: 4	How do you confirm that GMC needs to repair this problem? Is it suffice that a service bulletin has been issued?

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