clunking one legger - Hot Rod Forum : Hotrodders Bulletin Board -- Hot Rod Forum

Register FAQ Search Today's Posts Unanswered Posts Auto Escrow Insurance Auto Loans
Hot Rod Forum : Hotrodders Bulletin Board > Tech Help> Transmission - Rearend
User Name
lost password?   |   register now

LinkBack Thread Tools
  #1 (permalink)  
Old 05-09-2005, 07:20 PM
Redman Racing
Last photo:
Join Date: Sep 2003
Location: Philadelphia
Age: 35
Posts: 235
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
clunking one legger

I am noticing a slight clunk coming from the rear

i have a 85 olds cutlass 442 8.5 3.73 open all original parts

i took the cover off and noticed that there was no play with the ring and pinion but did not look at the spider gears. checked the u-joints by prying but got no play (that is original what I thought it was). then I had the car up on one side and was turning the wheel by hand and noticed a lot of play I will be honest about my abuse of the rear. I have done huge one legger burnouts ( i love to put out way more smoke then my 2 legger friends it's great).

but to the question Will worn spider gears make a rear sound like that?

Reply With Quote Quick reply to this message
Sponsored Links
  #2 (permalink)  
Old 05-10-2005, 01:50 AM

Last journal entry: Robs34 - Done my dash
Last photo:
Join Date: Nov 2004
Location: Adelaide Hills South Australia
Age: 61
Posts: 110
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
You smoke, you break

Yup! I'd say you have damaged the carrier to the extent that your spider pins can move inside it. The clunk is the pins allowing the spiders to move relative to the drive axle - should break soon. Your one legger will smoke better because the spider gear action allows the driven axle to rotate at twice the input speed as soon as you lose traction. Oh well it looked good while it lasted!
Reply With Quote Quick reply to this message
  #3 (permalink)  
Old 05-21-2005, 07:02 PM
steve t's Avatar
ex biker, now hotrodder
Join Date: Mar 2005
Location: NC
Age: 66
Posts: 863
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
all old open rear end have a clunk, i never broke one, but it dont mean i wont
Reply With Quote Quick reply to this message
  #4 (permalink)  
Old 05-23-2005, 05:58 AM
M&M CUSTOM's Avatar Moderator
Last wiki edit: Transmission identification
Last journal entry: 1988 Suburban, the project continues.
Last photo:
Join Date: Mar 2003
Location: Northwest Pennsylvania.
Age: 44
Posts: 2,236
Wiki Edits: 9

Thanks: 0
Thanked 2 Times in 1 Post
I disagree with the last two answers, but won't get into that.

They didn't get into finding out the exact problem and overlooked the main cause of the problem, which you stated in your post. I seriously doubt you hurt the carrier at all.
Is it a single clunk and done, or several smaller clunks?
Is it when the transmission is shifted to reverse and back only?
Does it happen all the time, more on turns, or intermittantly?

If it is the spider gears, you can get a replacement set for less than $100, and it is a do it yourself job.

From reading your post thoroughly, I can honestly say that you have a very well worn set of spider gears, a very good possibility of the axleshaft splines having more than normal wear, and a good possibility of the gear lube having metal from the spider gears wearing- going through the teeth on the ring and pinion gears also.

Check the R&P gears for wear marks (they should all be pretty much smooth), look between the ends of the axleshafts and the center pin and have someone move one tire at a time in and out to see if there is any movement (only a couple thousandths is acceptable- it is just enough to notice movement and nothing more).

The next thing is to remove the center pin and visually check it for damage where the ends of the shafts contact it, if none- check the C-clips, if worn- replace as they are cheap, check the axleshaft splines for wear- if it looks like the splines aren't perfectly straight from one end to the other or there is enough wear for the new spider gear to allow movement on the shaft, replace the axleshafts too. If no wear is present on the center pin, C-clips, or ends of the axleshafts, or axleshaft splines, then replace the spider gears and be happy it wasn't more.
Reply With Quote Quick reply to this message
  #5 (permalink)  
Old 05-24-2005, 12:57 AM
Last photo:
Join Date: May 2003
Location: Shreveport LA
Age: 66
Posts: 5,106
Wiki Edits: 0

Thanks: 0
Thanked 1 Time in 1 Post
Might also check the ends of the pinion shaft where they fit in the carrier. I saw a 7.5 that had seen way too much torque and/or shock, and the holes where the shaft rides were not nearly as round as they had once been.
Reply With Quote Quick reply to this message

Recent Transmission - Rearend posts with photos
Gear in this thread - Powered by O'Reilly Auto Parts

Quick Reply

Register Now

In order to be able to post messages on the Hot Rod Forum : Hotrodders Bulletin Board forums, you must first register.
Please enter your desired user name (usually not your first and last name), your email address and other required details in the form below.
User Name:
Please enter a password for your user account. Note that passwords are case-sensitive.
Confirm Password:
Email Address
Please enter a valid email address for yourself.
Email Address:
Please select your insurance company (Optional)


Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
Thread Tools

Posting Rules
You may post new threads
You may 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

Similar Threads
Thread Thread Starter Forum Replies Last Post
Wheel clunking and brake squeal skizot Suspension - Brakes - Steering 29 10-09-2004 06:17 AM
irregular clunking sound jongp Transmission - Rearend 4 07-25-2004 05:38 PM
chev 12 bolt posi clunking when turning 66chev Transmission - Rearend 9 08-11-2003 01:30 AM
Clunking 78Chev Transmission - Rearend 3 11-26-2002 01:51 PM

All times are GMT -6. The time now is 04:37 PM.

Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2016, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0 PL2
Copyright 1999 - 2012. All Rights Reserved.