100 Series front diff rebuild (1 Viewer)

This site may earn a commission from merchant affiliate
links, including eBay, Amazon, Skimlinks, and others.

Joined
Jun 18, 2021
Threads
1
Messages
85
Location
Maryland
Looking for recommendations on shops local or that can send a complete unit for my core. It seems that my diff is bad and short of YotaMasters I haven’t had any luck finding a plug and play solution.
Finding something at a yard seems risky without knowing mileage and condition, but I’m open to suggestions.

Resized_20250501_170241_1746133386455.jpeg
 
If you're in Frederick, than your best bet is to start at land cruiser heaven for parts and service. They can probably handle a regear and lockers if you've been thinking about it.

 
When I had to replace the diff on my wife’s 100, I ended up buying a new one they toyota and then sold the old one for a core to a person that was gonna build it for their 100. It was maybe $200 more than buying used and a core fee.
 
I was just going to say that new assemblies from Toyota aren't much more if any than rebuilding. We've been using new assemblies more often lately as the mileage gets higher on the trucks coming in.
What causes diff failure like that? Old diff fluid? Just want to make sure the same thing doesn't happen to me as I'm closing in on 300k on my '04.
 
What causes diff failure like that? Old diff fluid? Just want to make sure the same thing doesn't happen to me as I'm closing in on 300k on my '04.
Most likely just old age. We also see pinion and axle seals being left to leak. You can only lose so much fluid before things melt.
 
I’m in Frederick, MD. I’ve got AAA and can move the whole truck or just pull the diffs if there’s a shop that can do em.
When the front differential in our 04 went I took it to East Coast Gear Supply and had it rebuilt with a Harrop e-locker. I lived in NC at the time, so it was just a day round-trip. If you off-road at all I’d recommend having it rebuilt vs ordering a new factory unit, as the factory units are set up pretty loose (i.e. weak) so that people don’t need to get a diff fluid change done at 500 miles on their brand-new car. A properly set up rebuild will be stronger, particularly if you spring for a locker.
If just a commuter/family car, new factory unit probably great for another 200k miles.
 

Users who are viewing this thread

Back
Top Bottom