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Hi again. I've had my Bronco for about 5 months now and i really wanted to change the differential fluids on her. I'm not sure if they have ever been changed so i figure i'd rather be safe than sorry. Plus I'm going to be taking her off road so i wanted to make sure this was done right.
Ok, here we go: What fluids do i replace the front and rear differentail with (brand, grade, weights?) and are there any type off additives i need to put in? I know my mustang needed an additive for limited slip. Also what do i put in the transfer case and the tranny. She has a stock 4spd.
Thanks guys I really appreciate the help. I have a Chiltons manual but it really doesn't tell me what to use. Any more ideas what to change/lube before i hit the trails?

Rock on :rockon
 

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I use the Lucas gear oil. No additives (except water and mud:doh0715: ). Expensive, but what the hell. I'd just spend the money on something else anyway.:beer
 

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I run 85w140 in everything. I buy the stuff by the 5 gallon buckets.
 

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Jopes is right, run 84w140, make sure that if you have a limited slip to put the additive in as well. I run a mix of Lucas and 85w140 in diffs and transfer case. I find the axles and transfer case run cooler with the Lucas. Through grease job never hurts either, make sur you grease up the drive shaft splines as well.
 

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Checked my gear oil bottle and I used the 80/90 weight.
I believe the 78 Freewheeler Bronco package came with a limited slip rear. I think they had black bumpers too. Someone will chime in about the Freewheeler.
 
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