Author Topic: slack in rear differential  (Read 3575 times)

0 Members and 1 Guest are viewing this topic.

whatitdo430

  • Offline Dusty Trails
  • *
  • Turtle Points: 0
  • Posts: 2
  • Member since Jun '07
    • View Profile
slack in rear differential
« on: Jun 03, 2007, 07:16:31 PM »
I just got a 1987 toyota pickup and I'm kinda going through it and making a list of things to replace...I was looking at my u-joints and grabbed the rear driveshaft and it has almost 3/4 of a turn of slack in it....new to this so any help would be appreciated. also it is a 87 and has a carburated engine....I'm guessing it has been replaced??

Duffil

  • *lurker*
  • Offline Gold Turtle Award
  • *
  • Turtle Points: 88
  • Male Posts: 4,832
  • Member since Nov '04
  • -Hack-
    • View Profile
    • PhotoBucket
    • Buy me a soda
Re: slack in rear differential
« Reply #1 on: Jun 03, 2007, 07:36:07 PM »
not necessarily...carbs were available up until 88 IIRC.  I don't see how it could have that much slop and still drive.  It would have to be missing 75% of the pinion teeth...Possible your ujoints are totally shot, exaggerating what you're feeling?  try to isolate it, meaning put the trans in gear, ebrake on and spin the shaft. watch the ujoints as well as the pinion flange and double check where your movement is coming from.

Tallchevy

  • Offline Silver Turtle Award
  • *
  • Turtle Points: 235
  • Male Posts: 3,560
  • Member since Dec '06
  • Where were going we don't need roads!
    • View Profile
Re: slack in rear differential
« Reply #2 on: Jun 03, 2007, 07:43:19 PM »
not necessarily...carbs were available up until 88 IIRC. 
I don't know about that. I friend of mine had a 91 standard cab 2wd & it was carb'd  :dunno: I thought the same thing you did  :dunno:
:angry: My child is an honor student at Anton Levay's School of Satanic Arts :angry:

87 4Runner redo
http://board.marlincrawler.com/index.php?topic=41959.0
87 Toyota 4Runner, SAS Rig Gallery
http://board.marlincrawler.com/index.php?topic=29877.msg3

MiniSimp

  • Outdoor Enthusiast
  • Offline Gold Turtle Award
  • *
  • Turtle Points: 5
  • Male Posts: 5,119
  • Member since Jan '05
  • SimpsonBrothers.net
    • View Profile
    • Simpson Brothers Photography
Re: slack in rear differential
« Reply #3 on: Jun 04, 2007, 07:27:35 AM »
It would have to be missing 75% of the pinion teeth...
Or the backlash is way messed up...

jmsdad

  • Offline Rock Master
  • ***
  • Turtle Points: -132
  • Male Posts: 201
  • Member since Dec '04
  • Crawling with Marlin
    • View Profile
Re: slack in rear differential
« Reply #4 on: Jun 04, 2007, 09:07:49 AM »
I don't know about that. I friend of mine had a 91 standard cab 2wd & it was carb'd  :dunno: I thought the same thing you did  :dunno:

Yep, carbs were still used til 91 or 92.  But only in base model 2wd standard cab---at least on the few that I've seen.

whatitdo430 [OP]

  • Offline Dusty Trails
  • *
  • Turtle Points: 0
  • Posts: 2
  • Member since Jun '07
    • View Profile
Re: slack in rear differential
« Reply #5 on: Jun 04, 2007, 11:58:54 AM »
I guess I'm gonna pull it apart and see exactly whats going on with the rear end...How do I find out what gear ratio I have,  From what I've read this truck came w/ 4.10's but who knows about info you get from google...I may buy ring and pinion for front and rear. All I'm going with is 33/10.50's . Should I change gear ratios or leave them alone...I may go w/ bigger tires later so I dont know...thanks for the help guys

MiniSimp

  • Outdoor Enthusiast
  • Offline Gold Turtle Award
  • *
  • Turtle Points: 5
  • Male Posts: 5,119
  • Member since Jan '05
  • SimpsonBrothers.net
    • View Profile
    • Simpson Brothers Photography
Re: slack in rear differential
« Reply #6 on: Jun 04, 2007, 01:09:21 PM »
I guess I'm gonna pull it apart and see exactly whats going on with the rear end...
Good Idea
How do I find out what gear ratio I have,  From what I've read this truck came w/ 4.10's
There will be a pink blob of paint on the end of the pinion if you do, you will be able to tell right after you pull the drive shaft.
I may buy ring and pinion for front and rear.
Don't go wasting your money yet, take it apart and see whats going on.
Should I change gear ratios or leave them alone...I may go w/ bigger tires later so I dont know...thanks for the help guys
If you're running 33's you should be fine, wait until you have 35's or bigger before you change the gears, it's expensive to do twice.

Duffil

  • *lurker*
  • Offline Gold Turtle Award
  • *
  • Turtle Points: 88
  • Male Posts: 4,832
  • Member since Nov '04
  • -Hack-
    • View Profile
    • PhotoBucket
    • Buy me a soda
Re: slack in rear differential
« Reply #7 on: Jun 04, 2007, 02:20:02 PM »
Or the backlash is way messed up...
I thought about that, but damn, 3/4 of a turn...kinda hard to see it out that far, unless the caps are loose and he lost the locks. :dunno:

 :worthless:

MiniSimp

  • Outdoor Enthusiast
  • Offline Gold Turtle Award
  • *
  • Turtle Points: 5
  • Male Posts: 5,119
  • Member since Jan '05
  • SimpsonBrothers.net
    • View Profile
    • Simpson Brothers Photography
Re: slack in rear differential
« Reply #8 on: Jun 04, 2007, 02:45:27 PM »
unless the caps are loose and he lost the locks.
That's what I'm thinking, otherwise if it was broken teeth there would be grinding. Without an actual measurement of how far it rotates, no way to tell without tearing it out.

MiniSimp

  • Outdoor Enthusiast
  • Offline Gold Turtle Award
  • *
  • Turtle Points: 5
  • Male Posts: 5,119
  • Member since Jan '05
  • SimpsonBrothers.net
    • View Profile
    • Simpson Brothers Photography
Re: slack in rear differential
« Reply #9 on: Jun 04, 2007, 02:51:37 PM »
I just measured a properly set up 3rd and the furthest edge moves about 1/16"

 
 
 
 
 

Related Topics

2 Replies
1029 Views
Last post Nov 13, 2009, 10:58:45 AM
by joey0712
3 Replies
2905 Views
Last post Nov 13, 2012, 12:16:44 PM
by Nimyad
7 Replies
2286 Views
Last post Mar 26, 2016, 09:46:22 AM
by Dingman.
7 Replies
3090 Views
Last post May 07, 2016, 08:41:00 PM
by Plainview
5 Replies
1106 Views
Last post Jan 22, 2019, 07:25:43 AM
by 90 sa-yota