Page 1 of 3 123 LastLast
Results 1 to 20 of 47

Thread: What's the Recommended REAR END oil gl Grade?

Forum to discuss Austin Healey Sports Cars

  1. #1
    Freshman Member
    Join Date
    Sep 2008
    Location
    Ct USA
    Posts
    19
    Thanks Thanks Given 
    0
    Thanks Thanks Received 
    0
    Thanked in
    0 Posts

    What's the Recommended REAR END oil gl Grade?

    I just Rebuilt my rear end and lowered the Ratio.

    What is the best Gear oil to use in a 3000 rear

    What GL rating ?
    Is Synthetic OK to use?
    Thanks,Mark

  2. #2
    Great Pumpkin Keoke's Avatar
    Join Date
    Apr 2004
    Location
    LosAngeles Calif.
    Posts
    12,616
    Thanks Thanks Given 
    0
    Thanks Thanks Received 
    9
    Thanked in
    9 Posts

    Re: What's the Recommended REAR END oil gl Grade?

    Quote Originally Posted by hmsevans
    I just Rebuilt my rear end and lowered the Ratio.

    What is the best Gear oil to use in a 3000 rear A Hypoid 90/140

    What GL rating ?---API GL 5 or better.
    However there are oils out there that meet the GL5 specification but their manufactures will not pay for the certification

    Is Synthetic OK to use? I have no experience with them.---Keoke
    Thanks,Mark
    1966 Daimler V8 Saloon; Safely Fast, Built to Last & and; Smooth as Glass.
    1966 BJ8 [ 2 ] Lil Red & Miss bLU
    1985 XJ6 Saloon
    1948 & 70 Lincoln continentals
    1973 Volvo P1800ES

  3. #3
    Yoda
    Join Date
    Feb 2007
    Location
    California USA
    Posts
    4,021
    Thanks Thanks Given 
    5
    Thanks Thanks Received 
    52
    Thanked in
    46 Posts

    Re: What's the Recommended REAR END oil gl Grade?

    I use Redline 75W-90 in my (3.54) diff. Good stuff if you can keep in in

  4. #4
    Yoda tahoe healey's Avatar
    Join Date
    Aug 2002
    Location
    South Lake Tahoe, CA
    Posts
    3,525
    Thanks Thanks Given 
    0
    Thanks Thanks Received 
    2
    Thanked in
    2 Posts

    Re: What's the Recommended REAR END oil gl Grade?

    Haploid (spell)is what the books say for the differential.

  5. #5
    Great Pumpkin Keoke's Avatar
    Join Date
    Apr 2004
    Location
    LosAngeles Calif.
    Posts
    12,616
    Thanks Thanks Given 
    0
    Thanks Thanks Received 
    9
    Thanked in
    9 Posts

    Re: What's the Recommended REAR END oil gl Grade?

    [quote=Bob_Spidell]I use Redline 75W-90 in my (3.54) diff. Good stuff if you can keep in in

    Keep IT in stock or keep it in the pumpkin [

    Yes as you have shown the GL4 gear oil rating satisfies the application, but its gonna leak!---Keoke/quote]
    1966 Daimler V8 Saloon; Safely Fast, Built to Last & and; Smooth as Glass.
    1966 BJ8 [ 2 ] Lil Red & Miss bLU
    1985 XJ6 Saloon
    1948 & 70 Lincoln continentals
    1973 Volvo P1800ES

  6. #6
    Jedi Knight
    Join Date
    Dec 2004
    Location
    OZ
    Posts
    1,109
    Thanks Thanks Given 
    0
    Thanks Thanks Received 
    0
    Thanked in
    0 Posts

    Re: What's the Recommended REAR END oil gl Grade?

    Seem to remember it being called Hypoid 90/140 from memory

  7. #7
    Great Pumpkin Keoke's Avatar
    Join Date
    Apr 2004
    Location
    LosAngeles Calif.
    Posts
    12,616
    Thanks Thanks Given 
    0
    Thanks Thanks Received 
    9
    Thanked in
    9 Posts

    Re: What's the Recommended REAR END oil gl Grade?

    Wish it were 90/140 I would probably use it and it might not leak out of the pumpkin.--Keoke
    1966 Daimler V8 Saloon; Safely Fast, Built to Last & and; Smooth as Glass.
    1966 BJ8 [ 2 ] Lil Red & Miss bLU
    1985 XJ6 Saloon
    1948 & 70 Lincoln continentals
    1973 Volvo P1800ES

  8. #8
    Jedi Knight
    Join Date
    Dec 2004
    Location
    OZ
    Posts
    1,109
    Thanks Thanks Given 
    0
    Thanks Thanks Received 
    0
    Thanked in
    0 Posts

    Re: What's the Recommended REAR END oil gl Grade?


    Automotive Products: Two-Three Wheelers
    Gulf EP Gear Oil 80/90/140
    High Quality Gear / Transmission lubricant for Extreme Pressure conditions.

    Excellent oxidation stability and protection against rust, corrosion & foaming.

    Suitable for Manual transmissions, spiral bevel and hypoid gears in moderate to heavy duty service.

    Recommended for use in cars, trucks, buses, construction equipment, steering boxes and oil lubricated universal gear joints.



    Exceeds API GL-4, US MIL-L-2105, 1118 and UK Defence CS3000 performance level.

  9. #9
    Yoda
    Join Date
    Feb 2007
    Location
    California USA
    Posts
    4,021
    Thanks Thanks Given 
    5
    Thanks Thanks Received 
    52
    Thanked in
    46 Posts

    Re: What's the Recommended REAR END oil gl Grade?

    Redline makes both 75W-140 and 80W-140 gear oils (the latter is only recommended for trucks). They do note the heavier oils are a slight bit less efficient, resulting in lower mileage.

    https://www.redlineoil.com/products_gearl...mp;categoryID=6

    -- or --

    https://tinyurl.com/cnrqjr


    I'd stick with 75W-90; the first time I put it in it didn't leak but I pulled the diff a second time and now I'm getting a small drip, so it's at least partly in the installation. I ran Redline 75W-90 on a new (3.54) ring and pinion and both the ring and pinion showed hardly any wear after approx. 15K miles (the machine marks were still visible on the wear surfaces). My main concern is the hub bearings, which are of course lubricated by the diff oil. I've had to replace several of those and would prefer not to have to do that many more times. I think the synthetic would be at least as good as mineral gear oil for them.

    Note I don't work for Redline or sell their products; I tried MT-90 in my BJ8's gearbox and was surprised by smoother shifting and better O/D response when hot, so I put their gear oil in the diff. It seemed to me there was less brass shake in the transmission oil when I changed it out. FWIW, I don't buy the 'let the crud fall to the bottom' theory--the suspended (mostly brass) particles are so fine they aren't gritty at all and they are too small to plug any passages (I used 20W-50 motor oil before and never had any problem--I've put over 100K miles on my drive train). Any chunks large enough to plug a passage will probably do so whether you run mineral or synthetic--assuming the screen doesn't catch them--and I don't think having a bunch of sludge in the gearbox is necessarily a good thing. YMMV.

  10. #10
    Jedi Knight
    Join Date
    Dec 2004
    Location
    OZ
    Posts
    1,109
    Thanks Thanks Given 
    0
    Thanks Thanks Received 
    0
    Thanked in
    0 Posts

    Re: What's the Recommended REAR END oil gl Grade?

    well the drive train has been described before as agricultural before so perhaps the truck anology suits given that the cars are 40-55 years old and the machines/tolerances used for manufacture probably go back as far as the A30

  11. #11
    Luke Skywalker dougie's Avatar
    Join Date
    May 2008
    Location
    Portland, Oregon
    Posts
    1,559
    Blog Entries
    1
    Thanks Thanks Given 
    0
    Thanks Thanks Received 
    23
    Thanked in
    18 Posts

    Re: What's the Recommended REAR END oil gl Grade?

    The only oils I use in my race Healey are Redline and have been very satisfied with their performance under race conditions. I have also started using them in my street Healey , MT-90 in the BJ8 transmission and overdrive with great results.

    As well as the benefits described by Bob, I think it runs much more quiet.

    Dougie
    Dougie
    '65 BJ8 3000 MKIII GN.29
    '57 100-SIX MM Vintage Racer GN.1 #414
    Team Healey PDX

  12. #12
    Darth Vader AUSMHLY's Avatar
    Join Date
    Jan 2005
    Location
    California
    Posts
    2,537
    Thanks Thanks Given 
    0
    Thanks Thanks Received 
    7
    Thanked in
    6 Posts

    Re: What's the Recommended REAR END oil gl Grade?

    My garage floor shows every so often I have a drop of oil from the differential/rear end. Not sure how much oil I've lost over the years and thought this would be a good time to look into either adding oil or draining it and replacing.

    The Austin Healey Drivers Handbook says every 6,000 miles, check the oil level and replenish if necessary.
    When should the rear axle oil be drained and refilled?

    Handbook says, "Use only Hypoid oil in the rear axle".
    Handbook recommended Lubricants: Duckham's Hypoid 90, Castrol Hypoy, Sternol Ambroleum E.P. 90, Mobilube G.X.90, Esso Gear Oil G.P. 90, Filtrate Hypoid Gear 90, BP gear oil S.A.E. 90 E.P. , Shell Spirax 90 E.p.

    Research found Healey Surgeons recommends, "Use 80W/90 EP Gear Oil". They don't mention a brand.

    Moss sells, Dynolite SAE 90 GL4 Gear Oil.

    This tread:
    Hypoid 90/140, API GL5 or better.
    Gulf EP Gear Oil 80/90/140

    To recap.
    When to do a fluid change?
    What brand/weight of GL4 oil do most people use?
    Seems a single grade 90 is recommended by the Austin Healey Handbook. (what's the advantage of multi-grade?)

    Thank you.
    1964 BJ8 phase II

  13. #13
    Yoda
    Join Date
    Feb 2007
    Location
    California USA
    Posts
    4,021
    Thanks Thanks Given 
    5
    Thanks Thanks Received 
    52
    Thanked in
    46 Posts

    Re: What's the Recommended REAR END oil gl Grade?

    I use Redline 75W-140 in my BJ8 to damp a little diff whine, and 75W-90 in the BN2. I'm comfortable leaving it for 10yrs/50K miles or a bearing/seal change, whatever comes first.

  14. #14
    Jedi Knight Lin's Avatar
    Join Date
    Apr 2002
    Location
    Bradenton, FL
    Posts
    948
    Thanks Thanks Given 
    5
    Thanks Thanks Received 
    4
    Thanked in
    3 Posts

    Re: What's the Recommended REAR END oil gl Grade?

    Hey Roger,
    This is not what you asked, but I will volunteer it anyway. After all, that seems to happen a lot here!😎
    you started by mentioning that every now and then you get a differential oil drip on the floor. I had the same thing and was on a mission for a while to stop it. I tried lots of things from sealants to new plugs and etc. I finally tried the yellow pipe thread Teflon tape - NOT the white stuff - white did not work for me. The yellow worked! I have not had a single drop on the differential or the floor since I installed the yellow tape. Just thought I would share.
    Lin
    1959 AN5 Bugeye - now with my son 😀
    1960 BT7 3000 MKI
    1987 Alfa Romeo Spider Quadrifoglio

  15. #15
    Darth Vader AUSMHLY's Avatar
    Join Date
    Jan 2005
    Location
    California
    Posts
    2,537
    Thanks Thanks Given 
    0
    Thanks Thanks Received 
    7
    Thanked in
    6 Posts

    Re: What's the Recommended REAR END oil gl Grade?

    Hey Lin,

    I do appreciate that information. I am Leary of using any type of sealing tape around threads...will some pieces tear off and get into the oil?
    I was thinking of using Hylomar Advanced Formulation gasket and jointing compound (blue) (I think it's the same as Hylomar Universal blue) around the outside edges of the plug. I've used that around the exterior of the bolt heads at the steering box and that solved that leaking issue.
    The yellow pipe thread is a cleaner solution.
    1964 BJ8 phase II

  16. #16
    Jedi Knight Lin's Avatar
    Join Date
    Apr 2002
    Location
    Bradenton, FL
    Posts
    948
    Thanks Thanks Given 
    5
    Thanks Thanks Received 
    4
    Thanked in
    3 Posts

    Re: What's the Recommended REAR END oil gl Grade?

    I love Hylomar, and tried it for that application. Did not work for me.
    1959 AN5 Bugeye - now with my son 😀
    1960 BT7 3000 MKI
    1987 Alfa Romeo Spider Quadrifoglio

  17. #17
    Yoda
    Join Date
    Feb 2007
    Location
    California USA
    Posts
    4,021
    Thanks Thanks Given 
    5
    Thanks Thanks Received 
    52
    Thanked in
    46 Posts

    Re: What's the Recommended REAR END oil gl Grade?

    Sealing tape--white or yellow (yellow is for gas fittings)--is/should be made of Teflon. The shear forces in a diff and the pressure in the bearings will grind the tape into oblivion, giving you an extremely dilute Slick 50 (so it's not likely to be a problem in a diff). I'd be leery using it where small passages could be plugged, though, like brakes.

    I use white/Teflon pipe sealant on the plug--it's a pipe thread, after all--and it's worked well for me. Look closely to make sure the diff hasn't been cracked by a ham-fisted mechanic trying to stop a drip.

  18. #18
    Darth Vader AUSMHLY's Avatar
    Join Date
    Jan 2005
    Location
    California
    Posts
    2,537
    Thanks Thanks Given 
    0
    Thanks Thanks Received 
    7
    Thanked in
    6 Posts

    Re: What's the Recommended REAR END oil gl Grade?

    Quote Originally Posted by Bob_Spidell View Post
    I use Redline 75W-140 in my BJ8 to damp a little diff whine, and 75W-90 in the BN2. I'm comfortable leaving it for 10yrs/50K miles or a bearing/seal change, whatever comes first.
    Bob, Redline says for limited slip differentials. Healey's aren't limited slip are they? It doesn't say recommended for GL-4. Is that ok?

    This is from Redlines website:
    75W140 GL-5 GEAR OIL



    • Popular for cars and light trucks like Ford Mustang and F-150, Toyota Tundra and Sequoia, Jeep Cherokee and Dodge Ram
    • Contains additional friction modifiers for suitability with clutch-type limited slip differentials - for most LSDs, no additional friction modifiers are required
    • This product is not designed for use in most manual transmissions or transaxles, since the extreme slipperiness may cause synchronizer mesh issues that lead to shifting problems
    • Recommended for API GL-5, GL-6, MT-1, MIL-L-2105E and SAE J2360



    1964 BJ8 phase II

  19. #19
    Yoda Michael Oritt's Avatar
    Join Date
    Jun 2001
    Location
    Lusby, MD, USA
    Posts
    3,276
    Thanks Thanks Given 
    6
    Thanks Thanks Received 
    23
    Thanked in
    18 Posts

    Re: What's the Recommended REAR END oil gl Grade?

    GL-5 oil is more resistant to shearing forces.
    I use Amsoil Severe Gear EP 75/140 on all my cars.

    Best--Michael Oritt
    1954 Austin-Healey 100 Le Mans
    1958 Elva Courier (FOR SALE)
    1959 Elva MK IV Sports Racer
    1961 Ginetta G4

  20. #20
    Darth Vader AUSMHLY's Avatar
    Join Date
    Jan 2005
    Location
    California
    Posts
    2,537
    Thanks Thanks Given 
    0
    Thanks Thanks Received 
    7
    Thanked in
    6 Posts

    Re: What's the Recommended REAR END oil gl Grade?

    Handbook says, "Use only Hypoid oil in the rear axle".
    Handbook recommended Lubricants: Duckham's Hypoid 90, Castrol Hypoy, Sternol Ambroleum E.P. 90, Mobilube G.X.90, Esso Gear Oil G.P. 90, Filtrate Hypoid Gear 90, BP gear oil S.A.E. 90 E.P. , Shell Spirax 90 E.p.

    Moss sells, Dynolite SAE 90 GL4 Gear Oil.
    This seems to be the closes I can find to a single 90W.

    Are the GL-5 Multi-weight oils better?
    Are any of the multi-weight oils referenced prior, synthetic? Is Synthetic different from a Hypoid oil?
    1964 BJ8 phase II

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •