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RWD - Differential Oil Change

Volvo RWD 200 Forum

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Differential Oil Change 200

All three 240's need the diff oil changed, simply because to the best of my knowledge it's never been done. I did a search and info is a little sketchy and surprisingly, Bentley's has nothing on the subject. While Haynes does provide some insight, I'm hoping that fellow BB'ers can share their knowledge. A prior post: http://www.brickboard.com/RWD/index.htm?id=926284 indicates that I should check to ensure the fill plug can be removed first before I loosen a case bolt for draining, but I'm confused as to what type of oil to use as there is some info in my manuals about a limited slip differential fluid. Also is PB blaster warranted for use on the fill bolt or cover bolt? Or should I take off the cover. If so, does it use a gasket, or sealant or both?

Any help would be greatly appreciated to keep me out of trouble. Thanks

Marty Wolfson

--
90 244 216K, 93 244 167K, 93 244 109K, 99 V-70 73K





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Differential Oil Change 200

Hello BB'ers,

It's funny that the BB software allow some of these older posts to pop up. I wonder if this fortuitously came up to tell me that the diff oil needs changing again.

The 90 244 is long gone, the red 93 244 now has 324K or an additional 157K from my post back in '05. The green 93 244 is now at 199K with an additional 90K on it and the V-70 is at 145K with 72K more miles.

It's now some 7-1/2 years later and the bulk of the fleet is still running so I guess its time to pick up some jugs of gear oil.

Marty Wolfson

Proud member of the 300K club





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Differential Oil Change 200

Hi Marty,

My 93' 240 was a snap to do. Just removed the lower bolt and it will flow out just fine. Make sure the fill plug is loosened first (would not want to get it drained and have no way to refill).

I put some Teflon tape on the threads of the bolt and re-tightened it. Filled it with Wal-Mart 75-90 synthetic blend gear oil.

Good luck!
--
93' 240 Classic Wagon 220K & 92' 740 Wagon Regina/Rex 90K





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Differential Oil Change 200

I have been having the same problem as you for the last couple of days and just watched a you tube video on the subject. Jack up the rear of the car and spin one of the wheels. If the other wheel spins in the opposite direction, then you have the regular differential. If both spin in the same direction, then you have the LSD or limited slip differential.

As for oil, in the video, the tech was replacing the original oil with a 75/90 synthetic, which is probably what I'll do. ope this helps.





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Differential Oil Change 200

If you have the aft end pointed skyward mounted in axle stands, you can twist (spin) the drive shaft and see if both rear wheels go in the same flow (direction).

When you spin one tire to see if the other spin in the likewise direction, sometimes you have to spin the tire really fast to see. (Yet, with an open differential, you need not spin the tire or drive shaft so fast to see the opposite side wheel spinning in opposite direction.

cheers,

1990 Volvo 240 with red and white body panels, for now.





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Differential Oil Change 200

My 93 doesn't have a drain plug, but I discovered by accident that removing just the lowest cover bolt lets the oil out.





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Differential Oil Change 200

Both our 81 and 83 have a little, square headed, drain plug in the diff. case front part - below the pinion shaft. Definitely make sure the fill/level plug will come out before you drain. It's a big devil, with a pipe thread, so feel free to torque on it with a BIG wrench.

We now live in a place that gets a serious winter, so both 240's have Redline synthetic 75W90 and are noticeably more free-rolling first turn out of the driveway in the morning. Regular SAE90 hypoid lube is like paste wax on those minus20 mornings - not good for gears or bearings.
--
Bob (son's 81-244GL B21F, dtr's 83-244DL B23F, 'my' 94-944 B230FD; plus grocery-getter Dodge minivan, hobbycar 77 MGB, and a few old motorcycles)





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Differential Oil Change 200

re: "...so both 240's have Redline synthetic 75W90 and are noticeably more free-rolling first turn out of the driveway in the morning...."

FYI, Ams/Oil has a new synthetic hypoid high-pressure lubricant that is 75W-140 (and this isn't a typo). It's the same 75 weight at cold temperatures as the stuff you're using, but it will really protect (90 vs. 140 weight) at higher temperatures. I've been using it in my cars, my SUV's transfer case, and even in my boat trailer's hubs (it's got oil-filled, rather than grease-filled, hubs and bearings).





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Differential Oil Change 200

See the 700/900 FAQ for tips: you have the same axles.





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Differential Oil Change 200

Well, you raised my curiosity, so I checked in my 1987 240 Owner's Manual.

(That's the only owner's book I have here by the computer.)

Capacity.........1.7 US Qts, = 1.7 liters.

Oil Type.........API GL-5 (MIL-L-2105 B or C)

Viscosity........SAE 90 or 80W/90

Replace..........at 600-1,200 mile (1,000-2,000km) serivce only.

"Cars equipped with limited slip differentials should use oils with the proper additives."

No, it doesn't say what those "proper additives" might be.

Good Luck,

Bob

:>)





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Differential Oil Change 200 1988

Curious that there is no recommended differential oil replacement after initial break-in service.

Never again? Really?
--
1988 244 DL; B230F; LH-2.2; Manual 5-speed (M47)





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Differential Oil Change 200 1988

Interesting. I posted this some 14 years ago. Glad to still be around.

Marty





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Limited Slip diffs should have a tag 200

Odds are, you really don't have to concern yourself about limited slip additives, unless yours is one of the VERY few with this option -- does yours have it?
If you don't know, a tag on the differential should reveal this. Otherwise, just based on probability, probably only one in a thousand (maybe one in a few hundred up north, and maybe one in several thousand down south) have had this installed.

Or, you could determine this (if you're concerned that the tag was lost) by lifting the rear of the car -- without the handbrake on. Turn one rear wheel by hand (e.g., forward) ... if the other rear wheel turns the opposite way (i.e., backward) then you have an ordinary open differential; if it turns the same way (i.e., also forward), then you have a limited slip.





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Differential Oil Change 200

I would probably go with any high quality (mobile, valvoline, amsoil) 75w-90 if you live in a colder area of the country. Anything rated GL-5 should work. I don't believe you should need oil made for a limited slip differential.

Greg





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