Stigmata Donating Members 235 Member For: 12y 7d Gender: Male Posted 19/11/13 10:17 AM Share Posted 19/11/13 10:17 AM Hi guysJust wondering if anyone could help with a measurement of the stock tailshaft on an FG. I need to know the centre line height of the shaft from the top of the trans tunnel down to the shaft centreline just in front of the centre bearing. Hindsight tells me I should have checked this height before I had my custom shaft made up LOLThe shaft runs 1350 unis with an F150 centre bearing. At present I have the centre bearing spaced down 45mm. Having a few balance probsAny help would be awesomeThanks everyone Kind regards Jon Link to comment Share on other sites More sharing options...
bossmang FREAKY Donating Members 12,433 Member For: 15y 26d Gender: Male Location: Melbourne Posted 19/11/13 10:33 AM Share Posted 19/11/13 10:33 AM what are your balance problems? Link to comment Share on other sites More sharing options...
Stigmata Donating Members 235 Member For: 12y 7d Gender: Male Posted 19/11/13 10:41 AM Author Share Posted 19/11/13 10:41 AM Its not balanced! LOL It was giving a bad vibration so I turned the shaft 180deg and was heaps better. Leads me to think it wasn't balanced properly to start with? Ran it up at a mates Ford workshop tonight and removed about 40gram of the massive slab of weight the tailshaft mob welded to it. It is heaps better and we got the reading down to 180gm from 1100 odd that we began with. Have to go back and have a bit more of a play as it still gives a slight rumble at 100kmph. I just wanted to know the centreline measurement of a stock shaft to make sure I am not putting any load on the rubber uni drive as there is no uni at this endKind regards Jon Link to comment Share on other sites More sharing options...
Stigmata Donating Members 235 Member For: 12y 7d Gender: Male Posted 19/11/13 10:42 AM Author Share Posted 19/11/13 10:42 AM Oh and they had no FG's there tonight. Unbelievable!! LOL<br /><br />Kind regards Jon Link to comment Share on other sites More sharing options...
Stigmata Donating Members 235 Member For: 12y 7d Gender: Male Posted 20/11/13 10:14 AM Author Share Posted 20/11/13 10:14 AM Hi everyone Ok so I have it all sorted, we ran it up to within Ford specs and seems much much better. LOL just saw previous post about weight measurement, its meant to be mg not gm. Would be undrivable at 1100gm out!! Just for anyones future reference the measurement from tailshaft centre line to top of trans tunnel just before the centre bearing is 83mm. Moving mine up made a massive difference and dropped mg about 80 units. I did have 45mm spacers to the centre bearing which I cut down to 20mm to achive the correct height. Although I still could have raised it another couple of mm the 1350 uni is quite close to the top of the tunnel. Its off to the dyno in morning now Kind regards Jon Link to comment Share on other sites More sharing options...
old_mate Member 767 Member For: 18y 11m 7d Gender: Male Location: Brisbane Posted 20/11/13 01:06 PM Share Posted 20/11/13 01:06 PM You successfully on car balanced a tailshaft with uni joints? Nice one most of the cars I know just live with the hum at 80ks 1 Link to comment Share on other sites More sharing options...
Stigmata Donating Members 235 Member For: 12y 7d Gender: Male Posted 21/11/13 09:56 AM Author Share Posted 21/11/13 09:56 AM Thanks bud yep sure did. It is within Ford spec but I can just feel a very slight vibe at 100kmph. Will try and do the same process with the front of the shaft. It took all up about 4 hours LOLKind regards Jon Link to comment Share on other sites More sharing options...
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