ROCKETMQ1

iTrader: (1)

what grade of gear box oil should i use in my 95 wrx sti type ra?

thanks for your help!

wrx-kris

dextron 3 i'd say, go to a motor factors for it, should cost £10-£15

PeeVee

iTrader: (1)

Dextron 3 is an oil designed for automatic gearboxes.

The recomended oil is Castrol Syntrax 75w90

Gear Head

iTrader: (2)

Another vote for castrol syntrax!

JeffSTI2

I use Motul Gear 300 75W90 100% Synthetic Gear Oil in my STI gearbox and diff.

malinen

Does it have a LSD in the rear diff ?

Rear diff with Limited Slip Differential (LSD) needs an additive which GEAR 300 doesn't provide.. use Motul 90PA for that, for gearbox GEAR300 is perfect.

dj219957

syntrax

JeffSTI2

Thanks malinen, I wasn't aware of that. Luckily enough I havn't replaced the diff oil yet so I'll save the gear 300 I've got left for the gbox.

Jeff

wiseman

hi wot is the best way two get the oil in the dipstick two do the gearbox wot do use lot use

flat4

big funnel & some suitable hose

wiseman

thanks mate

flat4

and alot of patience, it can be a tad time consuming

blueyzfr1

What about DCCD Scoobs do you need an LSD oil in the gearbox then?

David_Harden

I just spent 2 days surfing through threads on this very subject. The answer is no. Subaru don't specifically require LSD oil for it. You can use a good grade GL5 gearbox oil. For the record, I've chosen Silkolene Silktran, which I just ordered tonight (thanks OILMAN). This meets GL4 requirements (for LSDs) as well GL5 so it does everything.

I decided not to use the Castrol Syntrax because it's not recommended for LSD applications.

David

blueyzfr1

Yep looks good as below!!

What do you recommend for the rear diff (plate lSD)

SILKOLENE SILKTRAN SYN
GL4 / GL5 SAE 75W / 90 Synthetic Gear and Transmission Oil £9.85 per litre
SILKTRAN SYN 5 is a fully synthetic gear lubricant for manual transmissions and final drive units in high performance vehicles. Designed to meet or exceed the most stringent gear oil criteria, Silktran Syn 5 incorporates the very latest additive and synthetic lubrication technology and is recommended for use wherever a multigrade API GL5 lubricant is specified.

Operates over a wide temperature range
Gives true “stay in grade” performance
Extends component life
Enables optimum power release, even at low temperatures
Recommended for:-
Quaife dog engagement gearboxes
Quaife Reversing Box and Quaife ATB Differential and Reverse Box Unit
Quaife gearbox internals and Quaife ATB differential
Quaife ATB differential running in axle

OTHERS
Gearboxes / gearkits running with ‘plate-type’ LSD units, refer to the LSD manufacturer for recommended lubricant.
When running Quaife ATB differential with standard gearbox – as one unit – lubricate as per vehicle / gearbox manufacturers recommendation

David_Harden

The same stuff - i.e. the Silkolene Silktran.

Personally I'm going to put Redline 75W90 in my rear diff cos I have loads of it already. However, it seems people are recommending against using it. Although it meets the requirements, some people have had problems with it. In my previous Scooby I used Redline 75W90NS in the gearbox, and I had no trouble with it at all.

David