pirate crew to the rescue? Driveline noise - Pirate4x4.Com : 4x4 and Off-Road Forum
 
Pirate4x4.Com : 4x4 and Off-Road Forum  

Go Back   Pirate4x4.Com : 4x4 and Off-Road Forum > Brand Specific Tech > Toyota - Land Cruiser
Notices

Reply
 
Share Thread Tools Display Modes
Old 09-30-2009, 05:39 PM   #1 (permalink)
Registered User
 
peiserg's Avatar
 
Join Date: Jan 2002
Member # 9598
Location: phoenix Azirona
Posts: 242
pirate crew to the rescue? Driveline noise

Too bad i changed more than one thing. Oh well. I simultaneously fixed some leaks on the TC (rear output shaft, speedo, and idler shaft o ring), and swapped out some worn 2 inch lift susp. for new OME 2 inch lift (I am still using my old ext. shackles for a total 4-4.5inch lift). 1975 fj40

Now i notice a driveline sound, most noticeable when doing 50-60ish, if i put the truck in neutral and coast.

Couple issues with my repairs. WHen i did the idler shaft, i accidentally slid the shaft out a little too far based on what Pirate wisdom recommends. The recommendation is for the absolute bare minimum required to expose the O ring on the idler shaft for replacement. I'm guessing it popped back 1/4-1/2 inch beyond the idler O ring before I slid the O ring on and pushed the idler shaft back in. i worried that the thrust washer fell off. I used a camera to peer as best i could into the TC and did not note a washer.

After about 200 miles with this noise, i opened the TC again, and didn't note any scoring on the gears or metal on the magnetic drain plug. the idler shaft gear seems pretty firmly immobile on the shaft with no play.

Other issue, if it is one, is the driveshaft. I disconnected it at the TC to pull off the rear output shaft seal. I didn't mark which part of the flange on the driveshaft bolted to which specific part of the flange on the output shaft. I didn't think it matters.

So...

The shaft is back off.. i took it into a shaft shop, and he is rebalancing right now. said it was off 8/1000" at 1500 rpm. I don't know if that's significant or not. Cant hurt to have it done tho.

My concern is did i mess up something on the TC, and it is now making noise vs. the driveshaft.

I did measure my angles. The rear differential is angled up at 15 degrees from the horizontal. the TC output is angled about 2 degrees DOWN from the horizontal. Does this seem acceptable for a 4-4.5" lift with a CV driveshaft?

I have my pre-existing 4 degree shim (fat side toward the front of the truck) under the rear springs. These worked for the last 10 yrs with my old 2 inch springs.

SO the cliffs-- worked on TC leaks and am worried thrust washer fell off idler shaft, even though theres no evidence after a couple hundred miles of internal damage. Put in replacement 2" lift OME springs at same time. Now have new noise on deceleration.
__________________
Posted by Mantis:
I STILL can't fathom what she was thinking... "Gee, I'm high bidder on one stroller, better bid on another. Horray! I'm high bidder on that one too! Gee this is fun, better bid on another."

Last edited by peiserg; 09-30-2009 at 05:40 PM.
peiserg is offline   Reply With Quote
Old 09-30-2009, 06:16 PM   #2 (permalink)
Registered User
 
Join Date: Feb 2000
Member # 29
Location: Redwood City
Posts: 6,701
Sounds like a bearing in the output shaft of the tcase. When it is loaded up, it has constant pressure on it, but the minute you coast, the pressure is gona, allowing it to flop around.

DIma
__________________
1974 FJ40 in the works
2006 F250 crew cab longbed powerstroke for towing duties
Flatty is offline   Reply With Quote
Sponsored Links
Old 10-01-2009, 10:10 AM   #3 (permalink)
Registered User
 
peiserg's Avatar
 
Join Date: Jan 2002
Member # 9598
Location: phoenix Azirona
Posts: 242
Quote:
Originally Posted by Flatty View Post
Sounds like a bearing in the output shaft of the tcase. When it is loaded up, it has constant pressure on it, but the minute you coast, the pressure is gona, allowing it to flop around.

DIma

good thought. thanks for the idea.
__________________
Posted by Mantis:
I STILL can't fathom what she was thinking... "Gee, I'm high bidder on one stroller, better bid on another. Horray! I'm high bidder on that one too! Gee this is fun, better bid on another."
peiserg is offline   Reply With Quote
Reply





Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On



All times are GMT -7. The time now is 03:23 AM.


Powered by vBulletin® Version 3.8.6
Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
Search Engine Optimization by vBSEO 3.6.0 ©2011, Crawlability, Inc.