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New truck owner, need help with t-case

Crunchnmunch

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Crunchnmunch Enthusiast

Crunchnmunch

Posted
Posted

Hey my name is William and iv recently purchased 2003 Sierra 1500 4x4 manuel from an auction. The truck seemed to be in good condition with no leaks till I put about a 100k on it then it started make a weird noise and and I found the t-case leaking from the main seal. Iv never owned or worked on a truck before so I was wondering if any one could answer a couple questions for me.

 

I was wondering if I need to put the truck on jacks stand so the wheels could move freely or if I could just drive it onto ramps? I'd also like to know if I have to remove the driveshaft aswell?

 

If any one could answer those for me I would greatly appreciate it

Thanks in advance.

Crunchnmunch Enthusiast

Crunchnmunch

Posted
  • Author
Posted

Blah forgot to say for dropping the t-case would it need to be on jack stands

brainpause Enthusiast

brainpause

Posted
Posted

I've only dropped one, but we had it on jackstands just for space. We had the trans in neutral and transfer case in neutral, brake engaged. My reasoning was that it would be easier to rotate the shafts for removal if needed. Not sure if it was necessary, but it worked for us.

 

You happen to be in the Nashville, TN area?

scooby5121 Enthusiast

scooby5121

Posted
Posted

Hi, You should mark the drive shaft so it goes back the same position.

I believe you are talking about the seal between the two halves? Transfer Case.

The outer seal is basically for dust and water.. The Inner seal is the one that is leaking!

When they did mine 4 times from leaking since new make sure it is aligned 100 percent or it will leak again in less than a mile.

That was from the dealership on their hoists. Ramps would be sufficient.

Scoobyft

Crunchnmunch Enthusiast

Crunchnmunch

Posted
  • Author
Posted

Thanks for the fast responses. I'm in Ontario, Canada. I'll try my ramps first cuz I don't really have stands for that kind of wait. I'll take some pics and let u guys no how it goes thanks agian

gmtech4 Senior Enthusiast

gmtech4

Posted
Posted

Hi, You should mark the drive shaft so it goes back the same position.

I believe you are talking about the seal between the two halves? Transfer Case.

The outer seal is basically for dust and water.. The Inner seal is the one that is leaking!

When they did mine 4 times from leaking since new make sure it is aligned 100 percent or it will leak again in less than a mile.

That was from the dealership on their hoists. Ramps would be sufficient.

Scoobyft

 

 

sorry Eric ,you dont need to mark drive shafts ,what seal are you aligning ? there is only the aligning of the drain hole for the booted rear output seal of the t case,you are making no sense and will confuse the op or just me,,

 

inner and outer seals ?? what are you talking about ? there is one t case input seal ,there is a t case adaptor between the trans and t case ,oil freely drains down back into the tranny,if the input seal of the tcase fails ,the tcase oil level goes up ,,,,

 

there is a front output seal on the t case and a rear output seal..

 

William ,if you can suspend the rear wheels off the ground ,you can spin the driveshaft to remove u-joint cap bolts easier or wrestle around the driveshaft with the wheels on ramps

 

15mm stubby rachet wrench is the tool for the t case to adaptors mount nuts ...trust Robert lol

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