Area Representative Geoff Brown Posted November 22, 2017 Area Representative Share Posted November 22, 2017 "They all do that sir"......! Link to comment Share on other sites More sharing options...
Speedtrip Posted November 22, 2017 Share Posted November 22, 2017 ....and, if your really lucky they whine like a b@$+ard! Link to comment Share on other sites More sharing options...
SM25T Posted November 22, 2017 Share Posted November 22, 2017 Have you checked the oil level ? Does it have the right sort of oil in it ? What type and how many miles ? Link to comment Share on other sites More sharing options...
Member Jonathan Kay Posted November 22, 2017 Member Share Posted November 22, 2017 Mine got a lot quieter when I eventually finished rivetting the interior panels...Jonathan Link to comment Share on other sites More sharing options...
Wrightpayne Posted November 23, 2017 Share Posted November 23, 2017 Mine does too. I chosen to always decelerate positively Link to comment Share on other sites More sharing options...
Paul Mason Posted November 23, 2017 Share Posted November 23, 2017 As a recent returnee to the world of 7’ing I had forgotten about the noises, bangs, pops, whines, drones etc.Whilst the drone and whine in 4th and 5th are tiresome at 40-60mph, the rest of the noise I actually quite like. Well, apart from the squeal of the brakes when going slowly/in traffic, which makes a fairly conspicuous mode of transport even more so!On my future, when there’s a few spare quid, maybe, possibly someday if I can ever afford it list, will be a straight cut gearset to make it even noisier!That said, as much as I love it, still sounds like something is going to fall off or break every time I drive it! But in the 700 or so miles I’ve done in the last 5 weeks, nowt has yet so happy days!Current solution...........select second gear, make the shift lights dance and then I can’t hear anything but the glorious shriek of K series goodness. Sorted Link to comment Share on other sites More sharing options...
Wrightpayne Posted November 23, 2017 Share Posted November 23, 2017 Whilst the noises are thrilling, dont forget to wear ear plugs - lots in archives about hearing loss / damage.I'm sure I drive mine harder with ear plugs in!!Ian Link to comment Share on other sites More sharing options...
Area Representative Geoff Brown Posted November 23, 2017 Area Representative Share Posted November 23, 2017 I have been mucking about with different oil in my BMW diff since new to ameliorate the noise.First: Halfords 80w90 GL5 with the friction additive - not too bad.Second: After changing the diff output seals Comma LSD 80w90. A tad noisier especially when hot.I am going to install Castrol Syntrax 75w140 during the winter service. Apparently this oil is 'recommended' for BMW LSDs.For Sierra Diffs (why did I originally put Type 9!) any good 80w90 or EP90 is ok. For Sierra Diff LSD I believe that Castrol 373 is recommended. Link to comment Share on other sites More sharing options...
Leadership Team SLR No.77 Posted November 24, 2017 Leadership Team Share Posted November 24, 2017 "noisy transmission on overrun"Clearly a rather vague post. Less clear ...A statement?A question?A problem?A desire?Anything I've missed? Link to comment Share on other sites More sharing options...
7 wonders of the world Posted December 10, 2017 Share Posted December 10, 2017 For Type 9 Diffs any good 80w90 or EP90 is ok. For Type 9 LSD I believe that Castrol 373 ides recommended. For clarification here Ford Type 9 is a gearbox not a Final Drive, the alloy Final Drive used on De Dion cars prior to the new heavier cast iron BMW lump is a 7" Sierra unit, the gear oil for this should reflect the type of differential within, open, Quaiffe ATB, or an LSD.Most plate LSD require a friction reduction additive to reduce plate chatter at slow speeds. Link to comment Share on other sites More sharing options...
jch1130 Posted May 22, 2018 Share Posted May 22, 2018 Hi Geoff, yes I also use Castro’s Syntax 75w140 as recommended by BPA Engineering ( experts in race car transmissions). Cheers John Link to comment Share on other sites More sharing options...
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