Author Topic: T Case Problems (Read 2919 times)

87toyotaman · « **on:** May 06, 2011, 12:37:19 PM »

Hey guys i just recently noticed a vibration and a loud humming noise comming from my t case the other day. I first noticed it when my girl and I were up at icehouse lake this last weekend. I thought i may have been caused by my non cv driveline but when I look that off and ran it I still noticed the noise. Its not a grinding but a humming. My theory is a bearing somewhere is going bad but i replaced them when my 4.7's when in last year. I noticed before draining my oil that I was about a half quart low.

I began tearing it down today and didn't find anything out of the ordinary. I used my smelling method to detect if any or the bearings had burnt up but no luck. I couldn't afford at the moment to put a cv on the rear just yet and I've got through 1 u joint since last year. I did notice the oil pump gear and speedo gear smelled a little burnt but the bearing underneath it was just fine. I never had any problems with the output shaft loosening up....

Any ideas? Thanks

87toyotaman · « **Reply #1 on:** May 06, 2011, 04:55:58 PM »

Wenhar · « **Reply #2 on:** May 06, 2011, 05:51:44 PM »

Quote from: 87toyotaman on May 06, 2011, 04:55:58 PM

ttt

Hey Yota man, I am a newbie here but let me try to see whats up ,

#1 are you dealing with a rig with a Automatic ?
please explain in more detail about the drive line Non CV?

87toyotaman · « **Reply #3 on:** May 06, 2011, 07:19:09 PM »

No its a 5 speed. I thought the vibration was coming from my driveline but when I disconnected the driveline the noise remained coming from the t case. I figured not having a cv threw a bearing out but they are all fine. The only thing i noticed was oil pump gear and speedo gear smelt a little burnt. My driveline angle is not bad at all.

Wenhar · « **Reply #4 on:** May 07, 2011, 11:46:17 AM »

Quote from: 87toyotaman on May 06, 2011, 07:19:09 PM

No its a 5 speed. I thought the vibration was coming from my driveline but when I disconnected the driveline the noise remained coming from the t case. I figured not having a cv threw a bearing out but they are all fine. The only thing i noticed was oil pump gear and speedo gear smelt a little burnt. My driveline angle is not bad at all.

Okay the thing about noises like that is they can be hard to pinpoint where they are coming from, sometimes,

Put the rig up in the air all four wheels have someone run the vehicle and see if you can detect if it is in the Transfer case for sure,

Over the years Frt Wheel hubs have been blamed for Transfercase problems, and Rear diff bearings blamed for frt wheel bearings,
Point is noise can and will transfer around,

And then again check the frt driveline carefully as well

87toyotaman · « **Reply #5 on:** May 09, 2011, 03:21:53 PM »

ttt. Okay well ill wait for more input since my t case is apart right now. Thanks.

Rocksurfer · « **Reply #6 on:** May 10, 2011, 02:12:21 AM »

I have to agree with Wenhar (imagine that) the driveshaft can move sounds though it making you think it is one thing when actually it is somewhere else. I like you, thought my tcase was having an issue but came to find that the pinion nut had come loose or the crush sleeve had failed and made the nut loose and was allowing my pinion gear to drop down and rub the gears against the carrier. On acceleration the pinion would lift off the carrier but when coasting it would ride against it causing noise and vibration when driving.

87toyotaman · « **Reply #7 on:** May 12, 2011, 08:50:55 PM »

My countershaft gear is hitting the case on the front side not the bottom or the side. That would explain things. What would cause this? its almost like I need a thicker gasket to give me more clearance.....please help. Thanks!

87toyotaman · « **Reply #8 on:** May 13, 2011, 07:41:14 PM »

87toyotaman · « **Reply #9 on:** May 14, 2011, 08:57:54 AM »

ttt anyonnnneee??

87toyotaman · « **Reply #10 on:** May 14, 2011, 09:11:46 AM »

It seems like I need some shims to keep the gear from hitting the case.....I haven't heard on anything to use. It needs to go behind the bearing right before the gear to keep the gear from hitting the case.....Ideas?

?

87toyotaman · « **Reply #11 on:** May 14, 2011, 05:14:37 PM »

87toyotaman · « **Reply #12 on:** May 14, 2011, 07:14:51 PM »

Heres my problem......look at the ring. The other marks are from the grinder

87toyotaman · « **Reply #13 on:** May 15, 2011, 10:43:15 AM »

Goldrush · « **Reply #14 on:** May 15, 2011, 10:59:00 AM »

is this 2.28 or 4.70? did u put a snap ring on the countershaft bearing (stupid question i know, but just trying to help.

87toyotaman · « **Reply #15 on:** May 15, 2011, 11:26:05 AM »

Their marlin 4.7's. Yep there was a snap ring on the countershaft bearing. If you think about it the snap ring only stops the gear from going too far in, my problem is that the gears coming to far out. Thanks for the help.

Goldrush · « **Reply #16 on:** May 15, 2011, 02:57:50 PM »

true. hmmm

87toyotaman · « **Reply #17 on:** May 15, 2011, 04:31:32 PM »

87toyotaman · « **Reply #18 on:** May 15, 2011, 05:06:28 PM »

Something is warn im just trying to find out what is. Its been a year since i had the 4.7s put in. Problems with shims? bearing? shaft?

93REDCRAWLER · « **Reply #19 on:** May 15, 2011, 06:10:52 PM »

Quote from: 87toyotaman on May 15, 2011, 05:06:28 PM

Something is warn I'm just trying to find out what is. Its been a year since i had the 4.7s put in. Problems with shims? bearing? shaft?

If your looking for pinion shims. look in the store part of the forum. there really cheep.
Just throw in this out there for ya i don't know if it will help or not.

87toyotaman · « **Reply #20 on:** May 15, 2011, 07:42:49 PM »

thanks. do they use the same size shims??? huh

Goldrush · « **Reply #21 on:** May 15, 2011, 08:23:01 PM »

ive never heard of a t case using shims...

93REDCRAWLER · « **Reply #22 on:** May 19, 2011, 04:49:02 PM »

Quote from: goldrush on May 15, 2011, 08:23:01 PM

ive never heard of a t case using shims...

its one of those days sorry man.
i should have payed a little more attention

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