Diff Gear oil

[Marnes702]

I got this big dick Full floater for my Tacoma. Definitely overkill haha It has a Strange case and full spool.

Wondering what Gear Oil everyone is running? Race-Dezert had some old threads on the topic but I think I can relate more with the trucks here. I’ve heard the 250w 300w is too thick and robs HP

 

[Prerunsilverado]

I run Lucas 85-140 in both my trucks and have never had problems doing so.
Have recommended the same in other vehicles I have built and worked on and had the same results.
All were 9 inch with either detroit lockers or spool.
Just recently I put the 85-140 in my daily Ranger (8.8 with limited slip) since that's what we had in the shop and its doing well too.

Nice rear end!

 

[84Prerunner]

250 wont rob any noticeable amount of hp but ive had better luck running redline heavy weight shock proof gear oil. Maxima used to make a straight 140wt I’ve used as well, not sure if they still do.

 

[Klever]

I like Swepco products. In my 10" set up I run 250wt

 

[84Prerunner]

I like Swepco products. In my 10" set up I run 250wt

The industry has been moving away from swepco. Supposedly a couple years ago they reformulated the moly XP oils and it’s having bad foaming issues.
Who knows if it’s a real issue but more than 1 reputable person in the gear industry told me this. I ran swepco 140wt for a few years in my truck, heard this and decided to investigate. Ran my truck on jack stands for only a minute and took the fill cap off after, it was in fact all foam. Switched to the redline I mentioned above, very little visible foaming

Just a little fyi for anyone who cares

 

[84Prerunner]

To add to that, I do have swepco 250wt in the front diff on my wife’s 4runner. Was chasing a clicking noise I thought might be the diff and it has a pinion seal leak. The 250wt “fixed” the pinion leak

 

[Oh4Tahoe]

250 wont rob any noticeable amount of hp but ive had better luck running redline heavy weight shock proof gear oil. Maxima used to make a straight 140wt I’ve used as well, not sure if they still do.

I second redline shock proof

 

[Marnes702]

Thank you all!

 

[Prerunsilverado]

I think I will be trying this 250w stuff in my truck next oil change. Ill give up a few HP to keep the gears happy.

 

[exp24]

Maxima 250 weight in our ranger, no complaints

 

[Turboyota]

I’ve been rocking Maxima 250W for like 12000 miles now. 5.43 gears are still happy!

 

[85Yota]

AJ at Evan Weller says they only run Maxima Racing Oils 250wt Pro Gear Oil

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Maxima 250wt Pro Gear

I've been using it in my F150 and no problems in that one, and I got gallons of it for customer's trucks and my own other vehicles as needed.

 

[RW81]

AJ at EWR said 250wt maxima for mine, but specially said NOT the progear. Might depend on if your locked or spooled

 

[85Yota]

Yeah I sent him the Amazon link above and he said yes thats the stuff he uses. He also said dont run a pro ring and pinion they're soft and dont last for street driving

 

[Marnes702]

Thanks all for the feedback. I used the Maxima 250wt ester oil that was linked in a comment. It’s been working out for me

Someone on IG posted the Pink Maxima 250wt mineral oil. I ChatGPT it and I guess the Blue bottle is a little better than the pink mineral oil but I figure I just post pics in here for reference.

 

[84Prerunner]

I’ve used the full synthetic in race trucks, used the red bottle in prerunners, great success with both.

Still running heavy weight shock proof in my own though.

 

[Brett_408]

I've always heard with 250w in the rear diff that you should warm the gears up like all the ballers at a race with the truck on jack stands idling. Would having 250w in a "prerunner" where you say pull it out of the garage and drive it around town occasionally be an issue if its not warmed before driving?

 

[85Yota]

Driving around town I think is good for breaking it in. The Race trucks, go from 0-100 real quick so no time to warm up, and that's why they do it

 

[Brett_408]

Driving around town I think is good for breaking it in. The Race trucks, go from 0-100 real quick so no time to warm up, and that's why they do it

I guess I never thought about it like that.

 

[59sled]

I'm running Curries 85-140 in my kids Camburg read end. Usually when in the desert. He will putt the truck around slowly for a minute or so to get the transmission and the rear end warmed up before he beats on it. Mainly because we all know how good Ranger transmissions are.