8.8 Rear Axle Rebuild - Drivetrain Tech - Tech Section

Home

Recent Topics

New posts

Not logged in - Login | Register

Ford-Rangers.com Ranger Forum > Tech Section > Drivetrain Tech > 8.8 Rear Axle Rebuild

Ford-rangers.com is a discussion forum, a Ranger forum for people who have questions about fixing or modifying
their Ford Rangers or people who just admire their Ranger. Please join and enjoy sharing experiences!

8.8 Rear Axle Rebuild #: 1195

Moderated by: NoPower, Mike69, MaDMaXX

Page: 1 2 3 4

New Topic

Rate Topic

Posted: Wed Sep 5th, 2018 12:37 am

Quote

26^th Post

jsoluna
Member

Joined: Mon Aug 27th, 2018

Location:

Posts: 53

Name:

Occupation:

Interests:

Status:

Offline

Reputation:

Reputation Points: 128

Member's Gallery

No upgrades, per se, unless you count the Trac-Lok as an upgrade (which I do, since it came factory with open diff).

Quote

Posted: Wed Sep 5th, 2018 12:38 am

Quote

27^th Post

jsoluna
Member

Joined: Mon Aug 27th, 2018

Location:

Posts: 53

Name:

Occupation:

Interests:

Status:

Offline

Reputation:

Reputation Points: 128

Member's Gallery

Fired it up over the weekend to hear it run. Love that truck. Can't wait to get it back on the road, but when I do a job I do it right so I'm not taking any shortcuts. All new brakes, ujoints, shocks, painting any of the parts that went through electrolysis.

Quote

Posted: Thu Sep 6th, 2018 04:51 am

Quote

28^th Post

Eddie Money
Member

Joined: Mon Nov 13th, 2017

Location: Pacific North West

Posts: 1330

Name:

Occupation:

Interests: Burt gummer life

Status:

Offline

Reputation:

Reputation Points: 2350

Member's Gallery

Cant wait to see it all done sounds like its gonna be nice!!

____________________

I know my crazy! Do you?
2007 Sport 4door 4x4 4.0L SOHC V6 Ranger

Quote

Posted: Fri Nov 23rd, 2018 11:28 pm

Quote

29^th Post

jsoluna
Member

Joined: Mon Aug 27th, 2018

Location:

Posts: 53

Name:

Occupation:

Interests:

Status:

Offline

Reputation:

Reputation Points: 128

Member's Gallery

Back at it everyone....pics to come tomorrow. Starting to set up the ring & pinion.

Quote

Posted: Fri Nov 23rd, 2018 11:34 pm

Quote

30^th Post

jsoluna
Member

Joined: Mon Aug 27th, 2018

Location:

Posts: 53

Name:

Occupation:

Interests:

Status:

Offline

Reputation:

Reputation Points: 128

Member's Gallery

First time I've rebuilt one of these, so there a lot of things that are taking me a lot of trial and error....

Quote

Posted: Fri Nov 23rd, 2018 11:53 pm

Quote

31^st Post

JAMMAN

Owns A Torsen

Joined: Mon Sep 18th, 2017

Location: Grove City Ohio, USA

Posts: 5719

Name: Jim

Occupation: Design and Innovation

Interests: RBV's, Computers

Status:

Offline

Reputation:

Reputation Points: 9263

Member's Gallery

Whatever you do stay away from the hammer :)

____________________
Truth sounds like hate for those who hate truth.

00 XLT 4WD RCSB 3.GO! Jalapeño
01 XLT 2WD RC Steppie 3.0 auto Silver

Quote

Posted: Fri Nov 23rd, 2018 11:55 pm

Quote

32^nd Post

jsoluna
Member

Joined: Mon Aug 27th, 2018

Location:

Posts: 53

Name:

Occupation:

Interests:

Status:

Offline

Reputation:

Reputation Points: 128

Member's Gallery

Very good advice.

Went with a small 4oz deadblow instead 😉

Quote

Posted: Sat Nov 24th, 2018 05:03 pm

Quote

33^rd Post

jsoluna
Member

Joined: Mon Aug 27th, 2018

Location:

Posts: 53

Name:

Occupation:

Interests:

Status:

Offline

Reputation:

Reputation Points: 128

Member's Gallery

All the external work is complete. Chased threads in axle housing (cover bolts), installed races for pinion bearings, installed axle bearings and seals, pressed on diff carrier bearings.

Attachment: IMG_20181124_124512156.jpg (Downloaded 59 times)

Last edited on Sat Nov 24th, 2018 05:06 pm by jsoluna

Quote

Posted: Sat Nov 24th, 2018 05:07 pm

Quote

34^th Post

jsoluna
Member

Joined: Mon Aug 27th, 2018

Location:

Posts: 53

Name:

Occupation:

Interests:

Status:

Offline

Reputation:

Reputation Points: 128

Member's Gallery

Races installed.

Attachment: IMG_20181124_124519953.jpg (Downloaded 55 times)

Quote

Posted: Sat Nov 24th, 2018 05:09 pm

Quote

35^th Post

jsoluna
Member

Joined: Mon Aug 27th, 2018

Location:

Posts: 53

Name:

Occupation:

Interests:

Status:

Offline

Reputation:

Reputation Points: 128

Member's Gallery

Made a pinion flange holding tool from some scrap.

Attachment: IMG_20181124_124556539~2.jpg (Downloaded 56 times)

Quote

Posted: Sat Nov 24th, 2018 08:09 pm

Quote

36^th Post

jsoluna
Member

Joined: Mon Aug 27th, 2018

Location:

Posts: 53

Name:

Occupation:

Interests:

Status:

Offline

Reputation:

Reputation Points: 128

Member's Gallery

Got my first gear pattern witness.

Great heel to toe contact. Set backlash dead on to .008". Looks like the pattern is sitting high on the tooth though. Bring pinion further towards ring gear? What is a good estimate for a starting shim to get the pattern to shift closer to the root?

Attachment: IMG_20181124_153214271.jpg (Downloaded 56 times)

Last edited on Sat Nov 24th, 2018 08:12 pm by jsoluna

Quote

Posted: Sat Nov 24th, 2018 08:10 pm

Quote

37^th Post

jsoluna
Member

Joined: Mon Aug 27th, 2018

Location:

Posts: 53

Name:

Occupation:

Interests:

Status:

Offline

Reputation:

Reputation Points: 128

Member's Gallery

And coast side:

Attachment: IMG_20181124_153228167.jpg (Downloaded 56 times)

Quote

Posted: Sat Nov 24th, 2018 08:33 pm

Quote

38^th Post

jsoluna
Member

Joined: Mon Aug 27th, 2018

Location:

Posts: 53

Name:

Occupation:

Interests:

Status:

Offline

Reputation:

Reputation Points: 128

Member's Gallery

After looking over tons of images on the internet, it appears that the pattern I have is a lot more pronounced, possibly indicating that the pinion is too close to the ring gear. My original pattern that I took pics of before I removed the old ring and pinion looked almost identical though.

Attachment: 0_IMG_20181124_163243_639.jpg (Downloaded 56 times)

Quote

Posted: Sat Nov 24th, 2018 08:35 pm

Quote

39^th Post

jsoluna
Member

Joined: Mon Aug 27th, 2018

Location:

Posts: 53

Name:

Occupation:

Interests:

Status:

Offline

Reputation:

Reputation Points: 128

Member's Gallery

Coast side from original setup:

Attachment: 0_IMG_20181124_163316_951.jpg (Downloaded 55 times)

Quote

Posted: Sat Nov 24th, 2018 09:56 pm

Quote

40^th Post

JAMMAN

Owns A Torsen

Joined: Mon Sep 18th, 2017

Location: Grove City Ohio, USA

Posts: 5719

Name: Jim

Occupation: Design and Innovation

Interests: RBV's, Computers

Status:

Offline

Reputation:

Reputation Points: 9263

Member's Gallery

TO ME only setting up one in my life but being a machinist by trade I think your pinion was too far forward originally and looks great now.

If your lash is set to .008 that means there is room for lube. Are you sure about the .008 it looks like the ring and pinion are almost touching? If it is truly .008 (did you do that by adjusting shims to the right and left of the carrier?) I would leave it where it is.

Need dreaded sled or possibly V8 level2 in here for a second opinion. Maybe 410 has set a few.

____________________
Truth sounds like hate for those who hate truth.

00 XLT 4WD RCSB 3.GO! Jalapeño
01 XLT 2WD RC Steppie 3.0 auto Silver

Quote

Posted: Sat Nov 24th, 2018 10:04 pm

Quote

41^st Post

jsoluna
Member

Joined: Mon Aug 27th, 2018

Location:

Posts: 53

Name:

Occupation:

Interests:

Status:

Offline

Reputation:

Reputation Points: 128

Member's Gallery

Yep, it's dead nuts .008-.0085 checked in four locations. My first drop in with factory cast shims had it at .011 so I tightened it up a bit (shifted .006 over to the ring gear side) which brought the pattern down ever so slightly from the face and brought backlash in the tight end of the spec.

The contact pattern is just very pronounced, it shows contact over most of the heel->toe surface. Most of the indications I have seen of proper contact note a patch of full contact that is smaller. But again, I am new to this and don't have the intuition or the experience so I'm just using common sense.

Last edited on Sun Nov 25th, 2018 12:48 am by jsoluna

Quote

Posted: Sun Nov 25th, 2018 01:08 am

Quote

42^nd Post

Bird76Mojo
Ranger aficionado

Joined: Mon Apr 23rd, 2018

Location: Indiana USA

Posts: 112

Name:

Occupation:

Interests:

Status:

Offline

Reputation:

Reputation Points: 242

Member's Gallery

New ring and pinion set? Because if so, the brand may play a major part in those witness/contact marks being so elongated. I forget which brand it was, but many Mustang 8.8 owners were having problems with ring/pinions having a major howling noise after correctly setting up the gears. Most believed it was that manufacturer and the cut angles they were using, or worn production machinery.

GB :)

Quote

Posted: Sun Nov 25th, 2018 01:11 am

Quote

43^rd Post

jsoluna
Member

Joined: Mon Aug 27th, 2018

Location:

Posts: 53

Name:

Occupation:

Interests:

Status:

Offline

Reputation:

Reputation Points: 128

Member's Gallery

They are a Ford Racing 4.10 kit. I would hope the Ford gears would set up nice 😐

Quote

Posted: Sun Nov 25th, 2018 01:13 am

Quote

44^th Post

jsoluna
Member

Joined: Mon Aug 27th, 2018

Location:

Posts: 53

Name:

Occupation:

Interests:

Status:

Offline

Reputation:

Reputation Points: 128

Member's Gallery

My original gears which had a very similar drive and coast pattern, were very quiet (before the contamination of the fluid in the housing)

Quote

Posted: Sun Nov 25th, 2018 01:04 pm

Quote

45^th Post

jsoluna
Member

Joined: Mon Aug 27th, 2018

Location:

Posts: 53

Name:

Occupation:

Interests:

Status:

Offline

Reputation:

Reputation Points: 128

Member's Gallery

Moved pinion further towards ring gear. Brought the pattern down slightly, made backlash a little tight so I opened it up.

Current setup:
Pinion preload 25in/lbs
Pinion shims .040
Backlash .010

Shows more bias towards heel on drive and toe on coast now, but it is more centered root to face.

Attachment: IMG_20181125_083846558.jpg (Downloaded 50 times)

Quote

Posted: Sun Nov 25th, 2018 01:05 pm

Quote

46^th Post

jsoluna
Member

Joined: Mon Aug 27th, 2018

Location:

Posts: 53

Name:

Occupation:

Interests:

Status:

Offline

Reputation:

Reputation Points: 128

Member's Gallery

Coast side:

Attachment: IMG_20181125_083855553.jpg (Downloaded 50 times)

Quote

Posted: Sun Nov 25th, 2018 04:09 pm

Quote

47^th Post

jsoluna
Member

Joined: Mon Aug 27th, 2018

Location:

Posts: 53

Name:

Occupation:

Interests:

Status:

Offline

Reputation:

Reputation Points: 128

Member's Gallery

Drive side comparisons on the three different setups. Keeping backlash in spec was not possible on setup three with the .010 shims that came in the kit. I'm not tied to setup three anyway, just included it for reference on how the pattern is shifting. My gut instinct is that setup two is the best of the three.

Last edited on Sun Nov 25th, 2018 04:12 pm by jsoluna

Quote

Posted: Sat Dec 1st, 2018 04:04 pm

Quote

48^th Post

jsoluna
Member

Joined: Mon Aug 27th, 2018

Location:

Posts: 53

Name:

Occupation:

Interests:

Status:

Offline

Reputation:

Reputation Points: 128

Member's Gallery

Any input on the patterns?

Quote

Posted: Sat Dec 1st, 2018 06:58 pm

Quote

49^th Post

JAMMAN

Owns A Torsen

Joined: Mon Sep 18th, 2017

Location: Grove City Ohio, USA

Posts: 5719

Name: Jim

Occupation: Design and Innovation

Interests: RBV's, Computers

Status:

Offline

Reputation:

Reputation Points: 9263

Member's Gallery

From opinion, setup 2 seems more logical.

BUT even though .004 extra might take it out of spec (as in #3) in one of the tests, you have no idea how close to "specs" the ring or pinion were milled/rolled/ground whatever method they used, and you have no idea how close the bore of the pinion shaft area is to your axle shaft bores as far as an intersection point.

The backlash I would place dead last in the importance of the collective criteria.
ALSO once they wear for a while the contact should actually get better (I've noticed this with gears in lathes and presses) but the backlash will suffer slightly.

I don't know how it equates to backlash but I have seen pinion slop where the driveshaft would move about 5 or 6 degrees before engaging fully without any noticeable clunk while driving and coasting.

____________________
Truth sounds like hate for those who hate truth.

00 XLT 4WD RCSB 3.GO! Jalapeño
01 XLT 2WD RC Steppie 3.0 auto Silver

Quote

Posted: Sat Dec 1st, 2018 11:01 pm

Quote

50^th Post

jsoluna
Member

Joined: Mon Aug 27th, 2018

Location:

Posts: 53

Name:

Occupation:

Interests:

Status:

Offline

Reputation:

Reputation Points: 128

Member's Gallery

Thanks for the reply!

I can see the logic in your suggestions. I would like to add also that one of the things I've been going for is to match the factory lapped pattern present on the ring and pinion gears. My thinking is if you can keep it close to that same contact area in all dimensions and keep backlash as close to spec as possible, then it should provide some longevity.

Quote

Current time is 05:20 pm	Top	Page: 1 2 3 4
Ford-Rangers.com Ranger Forum > Tech Section > Drivetrain Tech > 8.8 Rear Axle Rebuild
Users viewing this topic