Author Topic: Bearing noise in T-case of 85, HELP!! (Read 3773 times)

wmflyfisher · « **on:** Aug 09, 2006, 03:00:32 PM »

So I've read and searched a lot on this subject and posted once before. I'm replacing this bearing pictured here below in my t-case b/c I pretty much narrowed it down that this has to be where my noise is coming from. Its not a wheel bearing, diff bearing, axle bearing, throwout bearing or pilot bushing. My truck makes this hurrendous noise when im niether on or off the gas but in between when cruising. It doesn't matter if the clutch is pushed in or not, same noise. You can really tell at higher speeds. I removed the bearing just a little while ago and it feels pretty smooth and tight. Does this mean that its most likely ok?? I had to order a new one b/c nobody had it. Is there anything else I should or could replace while I'm this far? I'm going to be ill if this doesn't fix the problem! Any help would be great!!

79coyotefrg · « **Reply #1 on:** Aug 09, 2006, 03:38:52 PM »

if its smooth and tight then i doubt its bad, but what about the rest of the bearings, and much more likely the rear output bearing in the transmission or input tcase bearing

wmflyfisher · « **Reply #2 on:** Aug 09, 2006, 04:04:51 PM »

I guess those could be bad but how hard are they to get to??

79coyotefrg · « **Reply #3 on:** Aug 09, 2006, 04:11:47 PM »

tranny has to come out to get to those, and a tranny is ALOT more involved than a Tcase, hopefully your input is bad

does the input of your tcase wiggle at all??

wmflyfisher · « **Reply #4 on:** Aug 09, 2006, 05:19:17 PM »

I don't think so. I mean ,the truck only has 99K on it and it hasn't been abused so I hope the 5spd is still ok!

79coyotefrg · « **Reply #5 on:** Aug 09, 2006, 05:23:57 PM »

shouldnt be the tcase either with that few of miles,

how was the u joints??

wmflyfisher · « **Reply #6 on:** Aug 09, 2006, 05:39:31 PM »

Well, I've never had the ujoints replaced so I guess thats an option. I dont think any of them have play though.

79coyotefrg · « **Reply #7 on:** Aug 09, 2006, 05:47:56 PM »

Quote from: wmflyfisher on Aug 09, 2006, 05:39:31 PM

Well, I've never had the ujoints replaced so I guess thats an option. I dont think any of them have play though.

dude you grease them regularly right

79coyotefrg · « **Reply #8 on:** Aug 09, 2006, 05:48:55 PM »

have you already pulled the tcase??

wmflyfisher · « **Reply #9 on:** Aug 09, 2006, 06:03:26 PM »

Yeah, I grease them pretty regularly, I've just removed the cover to the back of the Tcase. Its still mounted in the truck.

Hyena · « **Reply #10 on:** Aug 09, 2006, 06:06:56 PM »

does your truck have dual cases? i have heard many times that after people put dual cases in they hear bearing noises cruising. this happened to me too. i have heard that it is a normal noise. Mine went away after about a year. i am not sure if this is what you have but it sounds the same.

wmflyfisher · « **Reply #11 on:** Aug 09, 2006, 06:12:21 PM »

I just have the regular single case.

Jeremy · « **Reply #12 on:** Aug 09, 2006, 11:52:48 PM »

I have the same issue with that noise. I have dual cases same noise very loud on or off the gas somewhat quiet if I feather it. I have replaced a bunch of bearings and gears let me know what you figure out. Check your tcase main shaft at the rear flange mine was bent.

wmflyfisher · « **Reply #13 on:** Aug 10, 2006, 06:49:00 AM »

Well, I just replaced the bearing and I'm getting THE SAME NOISE!! AHHHH!! The hell with it, if it breaks, it breaks! I'm not worring about it anymore! I guess it could be the pinion bearing maybe but don't you have to tear the whole member apart to replace that?

Hottrod81 · « **Reply #14 on:** Aug 10, 2006, 03:15:31 PM »

I talked to Marlin about this issue. To get most of this noise out, you need to run a CV joint and point the rear pinion up to make a straight line with the driveshaft. I did this and most of the noise went away.

wmflyfisher · « **Reply #15 on:** Aug 10, 2006, 03:20:24 PM »

So where will I get the cv to run? What years will work and what not?

79coyotefrg · « **Reply #16 on:** Aug 10, 2006, 03:50:09 PM »

a cv from a 84-85 front shaft would be best

but i have dual cases and dont have a cv and the only noise i had was cured when i installed my L52HD

Hottrod81 · « **Reply #17 on:** Aug 10, 2006, 04:12:02 PM »

I run an 85 cv that has been clearanced

wmflyfisher · « **Reply #18 on:** Aug 10, 2006, 04:51:27 PM »

Huummm, I have a spare front 85 shaft just sitting in my garage. When I take it to my driveshaft shop what do I need to tell them? Sorry. I'm not that familiar with this stuff!

Marlin · « **Reply #19 on:** Aug 10, 2006, 11:33:23 PM »

This is a very common problem. Thanks for taking the time to replace the rear 63/28 t/case bearing. It is no surprise that it was NOT the problem. I have never seen these bearings fail if the t/case in in good serviceable condition.

I recall a certain customer in Fresno, that after installing an All Pro lift, had the same drivetrain noise and after talking to me [I told him to put a c/v joint on the rear d/shaft], his dad insisted on taking the truck to a Toyota dealership in Fresno. After their top drivetrain technician test drove his truck, they advised a new t/case at the then bargain price of $1500.00 plus $300.00 labor. He decided to have the rear leaking seal and the same bearing replaced at around $250.00 parts and labor.
No surprise, the noise was still there. They refused to refund his money. After checking the wrecking yards for a used t/case, He soon found out there were no cases to be found, I had brought them all.

Next, the customer returned to my shop, looking for a good used t/case. After I convinced him that his case was OK, I changed the output flange and installed a 84-85 c/v joint which corrected the noise and wrote a short note on the work order explaining how he had been taken and noted that the previous shop lacked basic mechanical knowledge and advised a complete refund. I was immediately contacted by the service manager and informed that I was on notice and would be contacted by his lawyer if I made any further negative comments against his dealership.

Hope this helps drive the word home. Get a c/v joint on the rear driveshaft at the t/case output flange.....

Marlin

wmflyfisher · « **Reply #20 on:** Aug 11, 2006, 06:15:39 AM »

Thanks a lot for the info Marlin. Its always nice to get a reply from the man himself! I will switch to the cv shaft when I get a chance and let you guys know the outcome. I have one question though. So i get the front flange from the front output driveshaft and move it to the back. Will I need a whole new rear driveshaft with the cv or should they be able to cut and weld the cv to my exsisting rear driveshaft. Thanks

79coyotefrg · « **Reply #21 on:** Aug 11, 2006, 11:24:06 AM »

you "could" use your shaft but you would need to put the slip spline at the rear diff and cut the shaft befor the yoke and weld in the CV, but would still have to change the flange

i'm guessing i dont have this noise because my truck isnt lifted that much, 3 inches , i have the parts to do it but just havent, i do have a very slight vibration at highway speed , maybe this would fix my vibrations

wmflyfisher [OP]

wmflyfisher [OP]

wmflyfisher [OP]

wmflyfisher [OP]

wmflyfisher [OP]

wmflyfisher [OP]

wmflyfisher [OP]

wmflyfisher [OP]

wmflyfisher [OP]

Related Topics