PaulR Posted February 24, 2014 Report Share Posted February 24, 2014 Just reassembled the gbox with all the new bits and all seemed to go well, however trying to turn the flange on the end of the overdrive ( that connects to the propshaft) by hand is almost impossible. Is this normal Attaching a power drill to the clutch end of the input shaft and sliding the reverse gear into mesh enables the output flange to turn as expected, so all seems to work, I'm just concerned about the amount of effort to turn it by hand Opinions please Paul Quote Link to post Share on other sites
MichaelH Posted February 24, 2014 Report Share Posted February 24, 2014 Doesn't sound right to me, what you are doing is the same as on the over run, ie the back end is turning the gearbox, something must be wrong for it to be v stiff., Got any oil in it?, even so I would be going backwards until I found what made it so stiff Michael Quote Link to post Share on other sites
Lebro Posted February 25, 2014 Report Share Posted February 25, 2014 It should be easy to turn the O/D flange in neutral, getting progressively more difficult as you go from top, to third, to second, to first & reverse. Did you try turning the I/P shaft in all gears before adding the O/D ? Bob. Quote Link to post Share on other sites
AlanT Posted February 25, 2014 Report Share Posted February 25, 2014 (edited) Did you rebuild the tail-shaft bearings? These are hard to set-up right. Did you rebuild the OD? If so did it turn freely before you connected to the the gbox? This is wrong somewhere. I'd take the OD off. Here is a cheap, weedy electric motor running the drive train at 1400 rpm via a loose belt-drive. http://flickr.com/gp/90670218@N04/bMW926 Edited February 25, 2014 by AlanT Quote Link to post Share on other sites
dingle Posted February 25, 2014 Report Share Posted February 25, 2014 FWIW-I found that after the OD clutch return springs were replaced, the flange was much harder to turn. It was worrisome, but turned out not to be a problem. Berry Quote Link to post Share on other sites
PaulR Posted February 25, 2014 Author Report Share Posted February 25, 2014 Hi Guys Thx for the responses I haven't rebuilt the O/D and it was fine before reassembly I guess off it comes again Anyone got any suggestions for keeping the 2 parts of the O/D that the Gbox output shaft slides into aligned as it was a real pig ThxPaul Quote Link to post Share on other sites
AlanT Posted February 25, 2014 Report Share Posted February 25, 2014 I seem to remember doing this quite easily by using a different layout to that usually recommended. I think I had the gbox vertical on its flange and lowered the OD onto it. Quote Link to post Share on other sites
PaulR Posted February 28, 2014 Author Report Share Posted February 28, 2014 Problem found Quite obvious after the event I had managed to bend the end of the output shaft when hitting it with a hammer to remove the rear gbox case bearing Lesson learned Quote Link to post Share on other sites
Lebro Posted February 28, 2014 Report Share Posted February 28, 2014 Ouch ! That sounds expensive ? Bob. Quote Link to post Share on other sites
AlanT Posted February 28, 2014 Report Share Posted February 28, 2014 I made quite a few tools when I did my transmission so I could dismantle without hitting anything. Stuff like this: http://flickr.com/gp/90670218@N04/0x3W3p made with just a drilling machine and angle iron. I admit to doing some lathe work for the layshaft tools and other bearings in the gbox. Quote Link to post Share on other sites
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