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avivalasvegas

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Posts posted by avivalasvegas

  1. GT6: Rough revving + excessive fuel smell + reduced power + stalls at idle without choke

    in Engine

    Posted

    What started as an occasional gradual stall at idle (without choke) and a slight petrol smell has now worsened to the above symptoms. The car was rolling road tuned <1000 miles ago and ran beautifully. Today, the motor wouldn't stop shaking through the rev range and it felt like the car was running on fewer cylinders. 

    Would be good to know what the most likely culprits could be so that I can troubleshoot? 

     

  7. Redline MT-90 Synthetic GL4 Gear Oil

    in Gearbox & Overdrive

    Posted

     

    On 29/04/2021 at 18:18, Nick Jones said:

    Been using the Redline shockproof in my Vitesse for about 15 years. It’s blood red..... and stays that colour even after hooning up and down the autobahns, unlike the stuff I used before which would go black and lumpy after one trip....

    It is expensive but not as expensive as a diff....

    Nick

    Nick,

    The bottle says "for offroad use". I don't suppose this made you wonder if it was suited for daily road use on the Autobahn?

  9. Redline MT-90 Synthetic GL4 Gear Oil

    in Gearbox & Overdrive

    Posted

    Just heard back from Redline US. 

    "In your rear differential the MT-90 would be recommended, though the LightWeight ShockProof would be an option, a different fluid than called for."

    when I asked if LightWeight ShockProof was yellow metal safe, I got this back. 

    "the ShockProof gear oils contain a copper deactivator so are safe with brass, bronze or copper though contain a friction modifier so could be too slippery for synchros and one reason they aren’t recommended for most street applications."

    I suppose it's 2 liters of MT90 in the overdrive transmission and 1 liter of lightweight shockproof in the diff. On the plus side, free postage :)

    • Like 1

  10. Redline MT-90 Synthetic GL4 Gear Oil

    in Gearbox & Overdrive

    Posted

    2 hours ago, Nick Jones said:

    Been using the Redline shockproof in my Vitesse for about 15 years. It’s blood red..... and stays that colour even after hooning up and down the autobahns, unlike the stuff I used before which would go black and lumpy after one trip....

    It is expensive but not as expensive as a diff....

    Nick

    Thanks for sharing. Do you know the correct viscosity for the Red Line Shockproof for the differential?

  11. Redline MT-90 Synthetic GL4 Gear Oil

    in Gearbox & Overdrive

    Posted

    3 hours ago, JumpingFrog said:

    The original oil Triumph recommended for gearbox/differential is Castrol EP90, you can still buy this. But oil technology has moved on in 50+ years.

    So, I'm with Roger on this. The differential oil in particular is often neglected and a pain if it hasn't been modified with a drain plug.

    A typical differential is ~95% efficient, which means the other 5% is going to heat, there's not so much air flow where it is, tucked up over the exhaust between the chassis legs... They do get quite hot.

    But I believe most of the Triumph differentials have copper washers under the sun and planet gears so it's also necessary to make sure whatever oil you use is yellow metal safe.

    Roger’s shock proof oil does not specify it is yellow metal safe. The MT90 oil in the first post on this thread does. Both are made by Redline. I’m guessing that means I go with MT90 in the tranny and diff?

  13. Redline MT-90 Synthetic GL4 Gear Oil

    in Gearbox & Overdrive

    Posted

    Sorry lads - my goal here is preservation of the gearbox i.e. less shiny metal in my old fluid. I've had great success with Amsoil ATF in my Classic Mercedes, so am a believer in synthetics from specialists brands like Redline and Amsoil, in the differential and gearbox. 

    The above oil is yellow metal safe and rated GL4. Cost aside, wise move? Is it the right viscosity? 

  14. Redline MT-90 Synthetic GL4 Gear Oil

    in Gearbox & Overdrive

    Posted

    I have a feeling we're going to get alot of the usual "don't use synthetics in a GT6" comments but I couldn't help but notice that this article endorses Redline MT 90 transmission fluid. 

    I took a look at the product details and it clearly is safe for brass internals. Given the Christmas tree decorations that came with of my recent fluid change, I'm keen to find the best oil for the job. Has anyone tried this one or Amsoil's equivalent in their gearbox?

  16. New GT6 MK2 Purchase - The journey of improving it further!

    in General

    Posted

    2 hours ago, Colin Lindsay said:

    As for additives... I was always told to avoid any kind of additive on overdrives, certainly any of the slippery versions that will wreck it - maybe someone here can advise if anything is overdrive safe if needed? Same for the diff - good oil is adequate. Paddocks sell a 140 grade which sadly they won't post to me but I always wanted to try it.

    Dale shared this as well for overdrive transmissions. He also shared that the previous owner was very wise to swap from the D type overdrive to the J type. 

    He was not opposed to using this MOS2 additive in the rear differential. I have used this on other cars with great success & will try it next.

  17. New GT6 MK2 Purchase - The journey of improving it further!

    in General

    Posted

    The GT6 is back. The following have been installed

    1) Koni rear suspension kit - Low speed ride is much better but at higher speeds the rear is a bit bouncy. Has anyone experienced this? 

    2) New Girling clutch master and slave - The failed master cylinder was also a Girling but the slave was aftermarket. Both were leaking.

    3) New Transmission oil - Dale uses Smith & Allen. He shared that the old fluid "looked like Christmas lights", which means loads of metal bits in it.  Is this normal for a GT6? Anything I can do to minimize it  - eg. an overdrive friendly additive. 

    4) New differential oil - The old fluid had turned black'ish. I plan to add Liqui Moly MOS2 differential additive to it to reduce friction wear.  

     

     

     

  18. Vitesse engine sludge

    in Engine

    Posted

    I have direct experience with engine sludge. It's not as easy to deal with. After much research, I found Auto-rx. It has earned a strong reputation for gently removing sludge during normal driving.

    I've used it in 5 of my vehicles to date with excellent results. I'm talking shiny internals and measurable increases in compression and fuel economy. It's the first thing I add to any vehicle I purchase and is currently running in my GT6. 

    It has no solvents and only requires that you follow instructions precisely and use a quality oil filter and a non-synthetic engine oil like Valvoline VR1. 

     

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