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9
votes
1answer
2k views

how to optimize fuel consumption by changing the rear differential ratio?

Is it possible to improve the fuel consumption (decrease it) in my van by changing the rear differential ratio? I would like to optimize it for low-speed driving about 40 km/h (25 mph). Is it true ...
2
votes
3answers
44 views

How to tell if an 08 CTS has a limited-slip differential?

I'm looking at purchasing a 2008 CTS RWD. From what I could gather from various forums, it sounds like a limited-slip was only included if you purchased the "summer performance tires" package. I ...
2
votes
2answers
23k views

Do I need to replace rear differential if it's leaking?

When we got an oil change, he said it's "leaking, but not out of fluid or low". Do we need to do any replacement/maintenance on it, or just wait until it gets worse? How would I check something like ...
2
votes
1answer
457 views

How to fix rear differential leak on 1974 Ford F250

I have a 1974 Ford F250 RWD that I use very rarely. I take it around the block once a month to make sure it still works. A while ago I noticed that the rear differential was leaking from (what ...
1
vote
3answers
3k views

Difference between “Hypoid” and “Limslip” oils

Recently I changed the oil in my vehicle's rear differential. The manual recommended the use of a "Hypoid" oil, but the guy at the auto parts store suggested a "Limslip" oil instead. I went along ...
1
vote
1answer
217 views

How do I check the fluid level in the rear end (differential) on a 1996 Caprice?

What is the procedure to check the fluid level in the rear differential? The RPO code for this particular rear end is G80.
1
vote
1answer
1k views

Can i remove the rear diff in my land rover freelander?

recently the rear diff in my 1998 land rover freelander has gone (makes a horrible clicking sound around corners). The car has been a constant pain and i was wondering what is actually the cause of ...
1
vote
1answer
120 views

1996 Caprice Classic rear end rub a little and jumps barely while backing up

I noticed that, when my ’96 Caprice is backing up on smooth concrete, it kind of grinds and jumped just barely. Is it my gears in rear end? Any other issues could cause this?
1
vote
1answer
379 views

Replacing a LSD, what needs to be considered between 1, 1.5, 2 way?

I need to replace the LSD on a 1995 (NA series) MX-5. The original diff was a viscous LSD, and over time has deteriorated as I hear they do. It is now essentially an open diff, if I lift one wheel off ...
1
vote
1answer
404 views

Differential Fluid Plug Right Above Catalytic Converter? - '99 Avalon XLS

Recently I was doing some routine maintenance on my 1999 Toyota Avalon XLS and when I was checking the 95k mileage procedures one of the items which caught my eye was replacing the differential fluid. ...
0
votes
2answers
40 views

Would it be worth it to rebuild my Detroit Locker?

I'm considering either buying a Wavetrac LSD (very expensive, so that's discouraging) or rebuilding my current Detroit Locker. The Locker seems to run fine except there's a lot of play in it. Would ...