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Transfer Case>>> Is Yours Leaking From Hole In Housing Made B

xoval

By xoval
in 2000-2014 Silverado HD & Sierra HD

Damage or No Damage  

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xoval Enthusiast

xoval

Posted
Posted

Ok, Fellow Members:

 

After reading a thread from recent days located here ...

http://www.gm-trucks.com/forums/index.php?showtopic=48648

 

I wanted to start a thread and Poll to investigate who has and has not had any problems with the transfercase due to the design flaw with the oil pump wearing the hole in the case.

 

Please list the year..model....manual or electric 4wd...mileage....

 

Lets see what happens..... I know my poll is crude but I will adjust ?'s if you got any input to change to make better..

 

Thomas...aka xoval

  • Replies 35
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minibike132 Senior Enthusiast

minibike132

Posted
Posted

I have an 04 with 120k on it, I don't tow regularly maybe a few times a month but I bought it off one of my good customers who is a regular tower and we never had a leak. I'm a tech way out in the country, everyone has 4wd every other person is a farmer or hobbiest that does a fair amount of towing. I think this thing is common enough for everyone to know about it but not anything as common as you might think. We might see a 5 a year (that would be a big year). If I was even a little scared I would go ahead and update to the clip but I don't think I will unless I'm already going to have the crossmember down for something.

xoval Enthusiast

xoval

Posted
  • Author
Posted

I changed the poll alittle last night and added the 3 selectiions for NO Damage mileage.....there are a few on the mileage that should actually been under no damage....sorry guys I made the adj to the poll with the added selections.

cape horn 24 New Member

cape horn 24

Posted
Posted

I've got an 01' 2500hd duramax/allison 116,170 and my holes (2) happened on Feb. 10 2008 on the back half cover lower half of the unit. I pull a 27' 3 horse slant 2-3 times a week and 24' Cape Horn boat 3-4 a month during fishing season, and a 16' utility trailer.

 

BA

  • 4 months later...
dwweber Enthusiast

dwweber

Posted
Posted

'01 Sierra 3500 D-Max/Allison - 255k and counting, no damage. I pull a skid-steer, a 6 horse slant GN, and hual hay on a flat bed, I do one of those at least once a week. The little metal plug in the center of the rear yoke is leaking. I thought it was a hole in the case originally, but looked closely and found no case damage.

bdeboer Enthusiast

bdeboer

Posted
Posted

I had a 99 K1500 Silverado for 96K, and traded for an '02 K2500 suburban that I traded at 98K. Both vehicles did not have the leak. Currently have an '05 K1500 Work truck and an '08 K2500 Dmax. 45,000 miles and 6,000 miles without transfer case issues. The work truck does have the manual transfercase. I am not sure if the manual t-cases have this issue or not.

Riverjet502 Enthusiast

Riverjet502

Posted
Posted

'04 3500 extended cab 22,000 miles. No leaky (model 261 manual T-Case)

  • 1 month later...
alz Enthusiast

alz

Posted
Posted

99 Suburban 1500, NP246 auto transfercase. Had first issue at 92000 miles. Had the t-case repaired by trans shop. Had a welder that could weld magnesium. Rebuilt t-case and installed updated bushings. Tow a 6-7k lb travel trailer 3-5 per year. Other than that it's a grocery getter.

Now at 102k miles, it's starting to leak at the weld and also looks like the case is splitting at the fill and drain plugs. Looks like I'm going to have to replace the rear case half.

tony tt Enthusiast

tony tt

Posted
Posted

ahhh,the good old pump rub...another one of gm's design flaw's. it mainly happens with the 2500 trucks. there is a clip inside the case that holds the gearator pump,,and it eventually wears out/breaks causing the pump to rub on the case and wear a hole. had it happen on my 04 duramax at about 135,000 km's. the worst part of it is,,it doesn't leak when sitting,,just when moving so it's hard to spot. towing doesn't really have any significance on wether or not it will happen.

  • 2 weeks later...
vern650 Enthusiast

vern650

Posted
Posted

my 01 2500hd 8.1/ali with electric t-case has no leaks at 79,000 miles, but my brothers 03 2500hd with8.1/ali and manual t-case did leak and he has around 160,000+ miles on it. he just cleaned it up and put some quick steel over the hole and so far so good.

joe2705 Enthusiast

joe2705

Posted
Posted
Ok, Fellow Members:

 

After reading a thread from recent days located here ...

http://www.gm-trucks.com/forums/index.php?showtopic=48648

 

I wanted to start a thread and Poll to investigate who has and has not had any problems with the transfercase due to the design flaw with the oil pump wearing the hole in the case.

 

Please list the year..model....manual or electric 4wd...mileage....

 

Lets see what happens..... I know my poll is crude but I will adjust ?'s if you got any input to change to make better..

 

Thomas...aka xoval

 

I found the hole to late and now its to late. T-case(NP261) is done.i have an NP241 would that fit on the Sierra 2500HD 6.0l

  • 1 month later...
98silvz71 Enthusiast

98silvz71

Posted
Posted

I have a question about what happens to the truck with t-case problems. What else has happened besides a hole forming in the case? Can the pump move make a driveshaft become unbalanced? I was just wondering because a friends 02 Dmax/Ally goes through U-joints like mad and it also shimmys in the rear. Doesn't matter what kind, brand, strength, etc. We have put a bunch in and to no avail they go bad in under a month. The tires are all balanced and rebalanced and rotated. Also new shocks have been installed. Now my 04 HD does the same. Since I know the t-case is a potential problem with these trucks could it be the culprit? My truck shimmys with new or old tires and stock U-joints and shocks. Any HELP is appreciated.

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