Regearing Woes - Ford Truck Enthusiasts Forums

Notices
1987 - 1996 F150 & Larger F-Series Trucks 1987 - 1996 Ford F-150, F-250, F-350 and larger pickups - including the 1997 heavy-duty F250/F350+ trucks

Regearing Woes

 
  #1  
Old 08-23-2016, 11:35 PM
Vadis's Avatar
Vadis
Vadis is offline
Senior User
Thread Starter
Join Date: Jun 2012
Location: BC, Canada
Posts: 358
Vadis is starting off with a positive reputation.
Regearing Woes

I recently finished my first rebuild and regearing of an 8.8 to 4.10s and just came back from my first test run. Ran it for about 15 minutes and got up to 50 mph. The diff housing seemed fairly hot but I'm not sure how much is too much. Is 5 seconds with my hand on it seem excessive?
Also it seems that I have a whine. Is there a sound it makes while the gears break in?

I had the recommended .012 thou back lash the Ford service manual wanted on the ring gear and the 21 in. ib. on the pinion bearing preload. I used a crush sleeve eliminator and had the right amount of shims there. I rebuild the limited slip while I was in there as well. The pattern looked really good to me and a few people I ran it by said the same.

Thoughts?
 
  #2  
Old 08-24-2016, 03:36 AM
Shadow944795's Avatar
Shadow944795
Shadow944795 is offline
Posting Guru
Join Date: Sep 2013
Posts: 1,023
Shadow944795 is starting off with a positive reputation.
If it was Open diff I'd say something was off. If it continues to whine I would do some investigating on forums and on the truck for anything odd. I play allot of games with junk but wondering if or when the rear will lock solid and roll you is a game no one sane or likewise should play.
 
  #3  
Old 08-24-2016, 09:42 AM
Lead Head
Lead Head is offline
Post Fiend
Join Date: Jul 2007
Location: Rhode Island
Posts: 7,857
Lead Head is a name known to allLead Head is a name known to allLead Head is a name known to allLead Head is a name known to allLead Head is a name known to allLead Head is a name known to all
Whine is not really normal. The diff getting hot is normal, but you should be able to keep your hand on it, especially if you were just driving around normally.

I'd take the cover off and double check your pre-load, gear pattern, and make sure the main carrier bearings are torqued correctly.
 
  #4  
Old 08-24-2016, 10:18 PM
Vadis's Avatar
Vadis
Vadis is offline
Senior User
Thread Starter
Join Date: Jun 2012
Location: BC, Canada
Posts: 358
Vadis is starting off with a positive reputation.
Well I may have posted this in haste. I just took it for another test run (both runs being under 10 miles each) and the whining has stopped and the temperature is only warm. I could keep my hand on it indefinitely.

I had talked to quite a few people today about this issue and at least half had mentioned it may be the way the gears were cut. Some gears make more noise initially until they break in. I guess I'll chalk it up to that for now. Obviously I'll keep an ear out for the first 100 miles (just under 20 miles at the moment) and then change the fluid.
 
  #5  
Old 08-24-2016, 11:22 PM
Festus Hagen's Avatar
Festus Hagen
Festus Hagen is offline
Methanoholic
Join Date: Mar 2009
Location: Maine (NorCal Native)
Posts: 6,442
Festus Hagen has a great reputation on FTE.Festus Hagen has a great reputation on FTE.Festus Hagen has a great reputation on FTE.Festus Hagen has a great reputation on FTE.Festus Hagen has a great reputation on FTE.
Brand new gears will get hot and whine a bit at first, some brands worse then others, this is why break ins are in short runs with plenty of cool down time and no working load or trailers for at least 500 miles!

-Enjoy
fh : )_~
 
 
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
Ron94150
1999 to 2016 Super Duty
8
01-11-2018 08:38 PM
gorkah
1999 - 2003 7.3L Power Stroke Diesel
38
10-25-2017 08:40 AM
tw450
2017+ Super Duty
42
10-06-2017 07:29 PM
juddspaintballs
1980 - 1986 Bullnose F100, F150 & Larger F-Series Trucks
7
09-01-2016 10:18 PM
az4x4bronc
6.0L Power Stroke Diesel
20
08-22-2016 02:07 PM


Thread Tools
Search this Thread
Quick Reply: Regearing Woes


Contact Us About Us Archive Advertising Cookie Policy Privacy Statement Terms of Service

© 2019 MH Sub I, LLC dba Internet Brands

We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.