Gearbox and limited slip diff oil
#1
Gearbox and limited slip diff oil
I've just been hit by a dose of paranoia.
My RB320 is in for service monday and is having a complete fluids change.
Rather than risk any old cheap oil being put in my pride and joy i bought my own oils from Opie.
I used there drop down list and believe i bought the correct oil for my gearbox and diffs.
I bought 6 Litres of Millers CRX 75w90 NT. The reason for my paranoia is i looked on the millers website for info on this oil (wondered what nano was) and used their drop down list, they recommended EP 75w80 GL5. I'm hoping i have just bought a better oil than what millers site recommend? Have i bought the right oil for my car??
I don't want to appear rude in anyway but, no guess work please lads. This is my baby so i need to know facts
My RB320 is in for service monday and is having a complete fluids change.
Rather than risk any old cheap oil being put in my pride and joy i bought my own oils from Opie.
I used there drop down list and believe i bought the correct oil for my gearbox and diffs.
I bought 6 Litres of Millers CRX 75w90 NT. The reason for my paranoia is i looked on the millers website for info on this oil (wondered what nano was) and used their drop down list, they recommended EP 75w80 GL5. I'm hoping i have just bought a better oil than what millers site recommend? Have i bought the right oil for my car??
I don't want to appear rude in anyway but, no guess work please lads. This is my baby so i need to know facts
#3
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I used 75w90 motul in my06 hawk for gearbox - no probs
For rear diff- must be LSD spec oil ( limited slip Diff )
Subaru recommends 5w/30 engine oil ( ok for normal drive ) , and a lot of scooby owners use 15w50 or similar ( better with high temp )
hope this will help in some way
Good luck
For rear diff- must be LSD spec oil ( limited slip Diff )
Subaru recommends 5w/30 engine oil ( ok for normal drive ) , and a lot of scooby owners use 15w50 or similar ( better with high temp )
hope this will help in some way
Good luck
#4
Cheers lads. This is what the Millers site say regarding CRX 75w90 NT.
To be honest i have not got a clue what type of diffs my car has??
Application
Designed for the lubrication of competition gearboxes. Manual transmissions, synchromesh, non-synchromesh, sequential gearboxes, transfer gearboxes and hypoid differentials without limited slip which require API GL4 or GL5 performance. Recommended for modern transmissions where fully synthetic oil is specified, especially for high performance road and track day applications. Hewland, Xtrac, Glebe Transmissions, ZF, Tran X, Elite Transmissions. Note: Does not contain friction modifiers. For plate type Limited Slip differentials use CRX LS 75w90 NT
Designed for the lubrication of competition gearboxes. Manual transmissions, synchromesh, non-synchromesh, sequential gearboxes, transfer gearboxes and hypoid differentials without limited slip which require API GL4 or GL5 performance. Recommended for modern transmissions where fully synthetic oil is specified, especially for high performance road and track day applications. Hewland, Xtrac, Glebe Transmissions, ZF, Tran X, Elite Transmissions. Note: Does not contain friction modifiers. For plate type Limited Slip differentials use CRX LS 75w90 NT
#5
I've just been on the opie site again. For my car (RB320) the upgrade recommended oil for the gearbox, front and rear diff is CRX 75w90 nt which is what i bought. But if you look at oils for limited slip diffs (non car specific) they say CRX 75w 90 LS (weights vary). All very confusing. Maybe my car has a different type of limited slip diff to the type that would use the LS oils ?
#7
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This is interesting as heard that if you do not use correct LS oil in the rear can cause wheel locking at low speeds, I currently have the CRX 75/90 in both box and rear diff, wonder if this may be my issue with the locking when carrying out tight turns at low speed when the oil is hot.
How can I clearly identify what rear diff I have?
How can I clearly identify what rear diff I have?
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#10
Looked in my hand book and it says use an API GL5 spec oil in the rear diff. Both the CRX75w90 NT and CRX 75w90 LS are API GL5 spec according to the Specifications and Manufacturer Approvals data on opie oils site. So from that i would assume both oils are suitable for the rear diff in my car.
I would love to know exactly what diff i have and what the difference is in these oils regarding suitability for types of LS diff.
I would love to know exactly what diff i have and what the difference is in these oils regarding suitability for types of LS diff.
#11
Millers CRX 75w-90 is part of the Millers Motorsport range and is a competition full synthetic transmission oil. A blend of full synthetic base oils incorporating new “Nano Technology” additive chemistry to significantly reduce internal frictional and power losses.
Use as received for the lubrication of competition gearboxes, and axles, which require API GL4 or GL5 performance.
Suitable for use in synchromesh and sequential gearboxes. Ideal for combined synchromesh gearbox and limited slip differentials.
Recommended for modern transmissions where full synthetic oil is specified, especially for high performance road and track day applications.
Use as received for the lubrication of competition gearboxes, and axles, which require API GL4 or GL5 performance.
Suitable for use in synchromesh and sequential gearboxes. Ideal for combined synchromesh gearbox and limited slip differentials.
Recommended for modern transmissions where full synthetic oil is specified, especially for high performance road and track day applications.
Competition full synthetic transmission oil with friction modifiers for limited slip differentials. Millers Oils CRX LS Synth 75w-90 incorporates “Nano Technology” additive chemistry to significantly reduce internal frictional and power losses, whilst providing additional shock protection to dog rings and gears.
Use as received for the lubrication of competition ‘dog’ gearboxes and axles which require limited slip high performance oils. Specially formulated for sequential gearboxes. Not suitable for synchromesh or overdrive boxes.
Use as received for the lubrication of competition ‘dog’ gearboxes and axles which require limited slip high performance oils. Specially formulated for sequential gearboxes. Not suitable for synchromesh or overdrive boxes.
Info taken from opie.
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So the CRX is fine in the rear diff? From some reading found that only Subaru rear diff oil should be used or motol oil?
Wonder if this is the cause of the rear locking up under tight turns at low speed and feeling tight when hot??
Wonder if this is the cause of the rear locking up under tight turns at low speed and feeling tight when hot??
#14
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I ran CRX 75w90 NT in the gearbox of my old Spec-D without any issues Chopperman. For the rear diff it was a bit noisy with Millers CRX LS 75w-90 NT so I switched it to Motul 90 PA and it was fine.
#15
Im not going to use the LS as with reading up tonight and talking to you gents i think the NT i have already bought is ok and its recommended by opie . Should i find after its noisy or any other negative issues i will drain it out and try something else. I think we have at least established CRX 75w 90 NT is not the incorrect oil for the rear diff. Whether its the best i think is still open for debate.
Thanks for your help tonight guys. So far its been a very interesting read
I'm still rather hoping someone in the know can tell me exactly what type of LS diff we/i have and any more info on oils or experiences is gratefully received.
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Yeah I'm good thanks, not been on here a lot since selling the spec D this time last year. Got a 9 week old baby boy now that takes all my time but still fancy another Subaru sometime.
#17
Congratulations mate Make the most of it while there young mate. The crying and dirty nappy's is nothing compared to uni fees, putting them on your car insurance ect. Not my car i might add, mums Mine are now 20, 17 and 12. My scooby is my sanctuary
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sorry should have clarified that CRX75w90 NT is perfect for the box...............for road use
for the diff then generally the likes of CRX80w90LS or CRX75w140NT LS for more arduous use
also use/stock Motul 90PA and Gear300LS
far easier and better IMO to get "real world" advice and product from someone that not only stock the correct product you require but can also back it up with any information or recomends and at the right price too...........
for the diff then generally the likes of CRX80w90LS or CRX75w140NT LS for more arduous use
also use/stock Motul 90PA and Gear300LS
far easier and better IMO to get "real world" advice and product from someone that not only stock the correct product you require but can also back it up with any information or recomends and at the right price too...........
Last edited by AS Performance; 18 August 2013 at 05:34 PM.
#22
sorry should have clarified that CRX75w90 NT is perfect for the box...............for road use
for the diff then generally the likes of CRX80w90LS or CRX75w140NT LS for more arduous use
also use/stock Motul 90PA and Gear300LS
far easier and better IMO to get "real world" advice and product from someone that not only stock the correct product you require but can also back it up with any information or recomends and at the right price too...........
for the diff then generally the likes of CRX80w90LS or CRX75w140NT LS for more arduous use
also use/stock Motul 90PA and Gear300LS
far easier and better IMO to get "real world" advice and product from someone that not only stock the correct product you require but can also back it up with any information or recomends and at the right price too...........
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Yep. Just wait till it starts running out of the filler hole and put the filler plug back in. . The pump I used to put the oil in was by a company called laser tools . Product code 4385. Made it sooooo simple. .
#26
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sorry should have clarified that CRX75w90 NT is perfect for the box...............for road use
for the diff then generally the likes of CRX80w90LS or CRX75w140NT LS for more arduous use
also use/stock Motul 90PA and Gear300LS
far easier and better IMO to get "real world" advice and product from someone that not only stock the correct product you require but can also back it up with any information or recomends and at the right price too...........
for the diff then generally the likes of CRX80w90LS or CRX75w140NT LS for more arduous use
also use/stock Motul 90PA and Gear300LS
far easier and better IMO to get "real world" advice and product from someone that not only stock the correct product you require but can also back it up with any information or recomends and at the right price too...........
Cheers
http://www.opieoils.co.uk/p-60232-mi...ssion-oil.aspx
Or
http://www.opieoils.co.uk/p-60260-mi...ssion-oil.aspx
Or
http://www.opieoils.co.uk/p-60255-mi...ssion-oil.aspx
Last edited by Inviroman; 19 August 2013 at 07:14 AM.
#27
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This is interesting as heard that if you do not use correct LS oil in the rear can cause wheel locking at low speeds, I currently have the CRX 75/90 in both box and rear diff, wonder if this may be my issue with the locking when carrying out tight turns at low speed when the oil is hot.
How can I clearly identify what rear diff I have?
How can I clearly identify what rear diff I have?
#28
This is interesting as heard that if you do not use correct LS oil in the rear can cause wheel locking at low speeds, I currently have the CRX 75/90 in both box and rear diff, wonder if this may be my issue with the locking when carrying out tight turns at low speed when the oil is hot.
How can I clearly identify what rear diff I have?
How can I clearly identify what rear diff I have?
#30
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Which one of the three posted will be best suited to allow me to order.
I have been told that it may be the centre diff may need to be replaced as uneven tires and dohnuts can cause this to fail (none done by me) dohnuts that is, had to replace the tyres as had uneven wear when a bought the car.
I have been told that it may be the centre diff may need to be replaced as uneven tires and dohnuts can cause this to fail (none done by me) dohnuts that is, had to replace the tyres as had uneven wear when a bought the car.
Last edited by Inviroman; 19 August 2013 at 07:43 PM. Reason: Stupid iphone keypad, or my bad spelling!