alexander Posted January 17, 2011 Report Share Posted January 17, 2011 Can anyone assist with a discription of how the speedo cable runs from take off on the ovedrive to the speedo, does in run in the car or under the floor and enters re the bulkhead. The cable I have is approx 44inches long is this correct? . The take off from the overdrive is at right angles, again is this coorect. Thanks in advance for any suggestions. Alexander Quote Link to post Share on other sites
angelfj Posted January 17, 2011 Report Share Posted January 17, 2011 Can anyone assist with a discription of how the speedo cable runs from take off on the ovedrive to the speedo, does in run in the car or under the floor and enters re the bulkhead. The cable I have is approx 44inches long is this correct? . The take off from the overdrive is at right angles, again is this coorect. Thanks in advance for any suggestions. Alexander Alexander: Reading this should help. http://www.britishcarforum.com/bcforum/ubbthreads.php/ubb/showflat/Number/696850/Searchpage/10/Main/70742/Words/speedo+cable/Search/true/Re_Speedo_Cable_Routing_TR3#Post696850 Quote Link to post Share on other sites
Don Elliott Posted January 17, 2011 Report Share Posted January 17, 2011 Go back to the same menu here, but one page back. Then look down at the 8th topic about "overdrive conversion". If you scroll down to my reply to Dave Lander in Spain, you will find the answer to your question. Quote Link to post Share on other sites
vivdownunder Posted January 18, 2011 Report Share Posted January 18, 2011 Alexander, if your car is RHD there are two speedo cable options. You can use an 84" cable. Mine loops across under the gearbox and comes up on the passenger's side. Then it goes across in front of the battery with a clip, as shown on the red car on the BCR forum link, but travelling the opposite way for RHD. A 96" cable also works in this configuration. The big loop under the gearbox needs to be cable tied up. . I've had a RHD TR3A with the speedo cable coming up on the driver's side (kept way from the accelerator linkages). I think it was a 69" cable, but over the years owners have had cables made up, so it can be confusing. If bringing it up on the driver's side, do a dummy run to check the cable length needed. Your 44" cable is not speedo - it will be for a rev counter, although the RHD TR3A cable is 51". Regards, Viv. Quote Link to post Share on other sites
Dave Larnder Posted January 18, 2011 Report Share Posted January 18, 2011 Hi Alex. You don't show your right angled drive. Put it in pointing forwards and downwards, then the cable runs inside the tunnel like mine. Dave Quote Link to post Share on other sites
alexander Posted January 18, 2011 Author Report Share Posted January 18, 2011 Hi Alex. You don't show your right angled drive. Put it in pointing forwards and downwards, then the cable runs inside the tunnel like mine. Dave I only have the drive shown in the photo, is this not correct. Do I need to change the drive I have. Thanks again to all for the quick responce Alexander Quote Link to post Share on other sites
Don Elliott Posted January 18, 2011 Report Share Posted January 18, 2011 (edited) Mine aims downwards at about a 45 degree angle straight through the hole in the floor and is covered by a black rubber boot secured to the tunnel with 2 screws and 3 screws to the floor into spire nuts. Edit - The handbrake lever arm is hidden under the carpet. No I don't drive my TR with it like that ! Edited January 18, 2011 by Don Elliott Quote Link to post Share on other sites
alexander Posted January 18, 2011 Author Report Share Posted January 18, 2011 Mine aims downwards at about a 45 degree angle straight through the hole in the floor and is covered by a black rubber boot secured to the tunnel with 2 screws and 3 screws to the floor into spire nuts. Edit - The handbrake lever arm is hidden under the carpet. No I don't drive my TR with it like that ! Hi Don, that was a world record for a reply, can't see to clearly on your photo if I should have a hole in my floor pan, that the rubber boot would cover. Alex Quote Link to post Share on other sites
vivdownunder Posted January 18, 2011 Report Share Posted January 18, 2011 Alexander, the pic you posted is the original way the speedo cable left the O/D, as Don has explained. The tranny tunnel and floor pan are shaped for the cable to exit without needing an extra hole. Dave mentioned a right angle drive, which was introduced for the TR4A. This part attaches to the O/D and turns the speedo cable so it runs parallel to the gearbox. It's a pricey little beast, but it removes the first loop in the speedo cable, thus allowing the use of a shorter cable. Regards, Viv. Quote Link to post Share on other sites
alexander Posted January 19, 2011 Author Report Share Posted January 19, 2011 Alexander, the pic you posted is the original way the speedo cable left the O/D, as Don has explained. The tranny tunnel and floor pan are shaped for the cable to exit without needing an extra hole. Dave mentioned a right angle drive, which was introduced for the TR4A. This part attaches to the O/D and turns the speedo cable so it runs parallel to the gearbox. It's a pricey little beast, but it removes the first loop in the speedo cable, thus allowing the use of a shorter cable. Regards, Viv. Thanks Viv all is clear now, I now know what I need to buy Alexander Quote Link to post Share on other sites
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