Question about Isuzu Cars & Trucks

1 Answer

Min./max backlash required on diff for Isuzu KB280DT 1998model after reconditioning & prior to "running in"

Posted by on


1 Answer

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    Top Expert:

    An expert who has finished #1 on the weekly Top 10 Fixya Experts Leaderboard.


    An expert that got 20 achievements.


    An expert that got 10 achievements.

  • Isuzu Master
  • 49,300 Answers

Around .005" -.010" measured at the crown wheel tooth
if you have back lash at the pinion yoke , that is not the backlash you need to measure as it is a combination of axle spline and side gear clearance in the diff
what is most important is the mesh position of the crown wheel and pinion teeth, preload on the pinion bearings and diff carrier bearings
you will need a workshop manual to get the correct mesh setting and preload readings

Posted on Dec 28, 2016

Testimonial: "Thanks Bill,Will pay attention to preload on pinion bearings and diff carrier bearings;replace shims with correct ones to bring back lash to within tolerance (according to specs)and rather prevent poss.excessive load/wear to crown and pinion gears."


1 Suggested Answer

  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

A 6ya expert can help you resolve that issue over the phone in a minute or two.
Best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
The service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.
Good luck!

Posted on Jan 02, 2017


Add Your Answer

Uploading: 0%


Complete. Click "Add" to insert your video. Add



Related Questions:

1 Answer

Isuzu kb280dt glow plug location and repair.. Cold start problem

Glow plugs will be in the head ,remove and Check how quick they glow if they are not instant they are faulty,check them with a battery and jumper lead power to the nut and earth the body,don,t burn your fingers.

Aug 28, 2017 | Isuzu Cars & Trucks

1 Answer

Isuzu giga truck injection pump require to change.What should I know about buying a new one

go to a diesel specialist shop
you can get yours fully reconditioned , or a fully reconditioned exchange unit for around 60% of the price of a new one
talk with the diesel technician before you do anything to get some idea of what is involved

Oct 03, 2016 | Isuzu Cars & Trucks

1 Answer

Hi I have a 2000 kb280dt isuzu bakkie need the cylinder head setting

first KB post to say Bakkie, telling me you are in Australia or thereabouts. (outback=Bakkie, sure...)
we don't have KB here in usa and means no books too.
this is a USA forum .
2.8L diesel.
head off?
so you need it all. and that is only in your KB service book
at your ISUZU dealer.
buy one?

Mar 01, 2016 | Isuzu Cars & Trucks

1 Answer

How to install new rear diff on 08 gmc sierra sle 2wd

If you are replacing the entire unit, often best to cut rusty bolts and replace them. If replacing just the guts, requires special tools to set gear clearance and backlash. Farm this out unless you plan to do this type of work often enough to justify purchase of tools.

Jun 06, 2015 | GMC Sierra Cars & Trucks

1 Answer

2001 Super Duty F 450 Drw ...shimming backlash on Dana 4.88 limited slip rearend

There is no shims to reduce the backlash in a diff. The backlash comes from incorrect thrust washes behind the side gears . They wear and allow the tooth clearance to become excessive . Using new washes will bring the backlash back into specs.. Check bushes in the gears and shaft condition that the gears are mounted on.

Nov 12, 2013 | 2006 Ford Super Duty F 450 Drw

1 Answer

Intermittent backlash in drive train appears to be between transfer case to front diff in 4th gear on bitumen when centre diff lock engaged no more backlash. mainly occurs when at a constant speed ie 70 to...

you shouldnt be in 4 wheel drive on bitumen you will get "bind up" of drive train which can cause damage or excessive freeplay in other components in drive train, inspect freeplay in universal joints on tailshafts, centre bearing and diff backlash specs, some backlash is quite normal, inspect trans/transfer case mounts also.

Jan 22, 2011 | 2001 Toyota Land Cruiser

1 Answer

I have a 98 ford f150 4wd rear diff is howling bad under load and coast no noise at no load had bad rear axles and brgs even though i didnt think this would fix it i replaced them as i expected, no...

the bad bearings and axles probably caused damage or wear to the gears / pinion when under load the bearings keep the axles straight and keeps downward pressure from loads off the gears and gear bearings --look at gear mesh will probably be off very slightly and not from backlash shims but from ring gear bearings or pinion bearing damaged

Apr 26, 2017 | Ford F-150 Cars & Trucks

1 Answer

Rear diff bearing torque settings 95 trooper

Do you mean the pre loads on the pinion bearings and the crownwheel ?
Pinion is 6 - 11.5 lbs Ins on new  bearings on the big nut as you turn it up the pinion should just start to turn .
, it has a collapsible spacer ..
Crown wheel bearing caps are 80 Ft/Lbs.
Crownwheel bearings are loaded by getting the backlash to 006' - 008' thou and putting a 002' shim each side to load the tapers up .

Sep 30, 2009 | 1992 Isuzu Trooper

1 Answer

Diff noise

I can understand on accel. and turning but decel I have never seen that I think it's possible tho. too much backlash would make sense

Sep 10, 2008 | 1996 Chevrolet Corvette

Not finding what you are looking for?
Cars & Trucks Logo

Related Topics:

49 people viewed this question

Ask a Question

Usually answered in minutes!

Top Isuzu Experts


Level 3 Expert

78267 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

22326 Answers

Thomas Perkins
Thomas Perkins

Level 3 Expert

14405 Answers

Are you an Isuzu Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides