yorkshire_spam Posted February 16, 2014 Posted February 16, 2014 Just exactly how frustrating and annoying is it trying to get a J-type OD back onto a single rail gearbox..... arrrrrrrrrrrrrrrrrrrrgh!?I can even test the alignment with the spare mainshaft.... still can't get the bstd thing back on!anyone got any top-tips?Cheers,Sam Quote
Richard B Posted February 16, 2014 Posted February 16, 2014 Have someone hold the O/D unit vertically with the hole upmost. Try lowering the mainshaft into position.If you try doing it horizontally, the splines move out of position. Played this game for over two hours trying to fit a new J'Type onto my daughters Dolomite 1500 gearbox. Quote
yorkshire_spam Posted February 17, 2014 Author Posted February 17, 2014 Thanks Richard, I'll give it a try (might remove the bell-housing first though to reduce the weight!)It's driving me insane! Even with a spare mainshaft to check the alignment with! Quote
tiggrr1 Posted February 17, 2014 Posted February 17, 2014 Easiest way for me was to stand the gearbox vertically bell housing on a couple of planks of wood (to save the input shaft)and lower the overdrive unit onto the main shaft. Never had a problem. Maybe I'm just lucky? Quote
Velocita Rosso Posted February 17, 2014 Posted February 17, 2014 If the splines are out of line in the overdrive....then it will not drop inStand it up and shine torch in or use bore scope and see if they are lined upOf not use long thin screwdrivers and ....hold the splines nearest to you so they dont move, then turn the farest away splines ...anti clockwise. they are the ones that move very freelyThey should line up pretty easy then Quote
Velocita Rosso Posted February 17, 2014 Posted February 17, 2014 PS...if you have problems...put it in a Tesco bag and walk up to the P and P meeting and we will do it ;D ;Dor give us a ring and we will come and help out ;) Quote
yorkshire_spam Posted February 17, 2014 Author Posted February 17, 2014 I tried moving the clutch ring to line it up - checked it with the spare mainshaft, but every time I turn the OD over to put it on the 'box it seems to shift/move.(I did read the manual's description on how to do it before I started! First time for everything!) Quote
smithy Posted February 17, 2014 Posted February 17, 2014 Are you making a three-stage rocket? I'm going to need more clues. Quote
tiggrr1 Posted February 17, 2014 Posted February 17, 2014 Sam if your feeling strong,Line it up in the position that you are going to fit it.Can you fit your spare shaft to the OD unit and then remove the shaft when the OD is orientated in the correct position for fitting.Then just plop it onto the main shaft on the gearbox giving the prop shaft flange a twist as you lower it to help the splines line up. Quote
yorkshire_spam Posted February 17, 2014 Author Posted February 17, 2014 smithy wrote:Are you making a three-stage rocket? I'm going to need more clues. I'll thank you not to mock the proud space program of the People's Republic of Yorkshire! ;-)@Steve - I'll give that approach a try tonight. Quote
Richard B Posted February 17, 2014 Posted February 17, 2014 Looks like your nearly there. Just put a bead of sealant around that join and it will be right as rain... ;D ;D ;D Quote
yorkshire_spam Posted February 17, 2014 Author Posted February 17, 2014 Richard_B wrote:Looks like your nearly there. Just put a bead of sealant around that join and it will be right as rain...Lol. I'll make sure I use silicone bathroom sealant and then whack the output flange with BFH?;-) Quote
yorkshire_spam Posted February 17, 2014 Author Posted February 17, 2014 Had another go at it - I don't think the tip on the mainshaft is entering the bearing at the back of the OD properly - I mic'd the tips on the old vs new shafts and the old is slightly smaller diameter, so I guess either the tip is too big, or it's not aligning as it goes in.... it seems to be going up the splines though.Help?! Quote
tiggrr1 Posted February 17, 2014 Posted February 17, 2014 If your sure the splines have lined up it may be time for a little gentle persuasion, the last inch or so was tight on my OD.It practically fell on the first time but when I got my NOS Volvo 27% OD the last bit was tight. A little bit of reading here http://gtsixing.blogspot.co.uk/although it won't tell you how to get the last bit engaged :B Quote
yorkshire_spam Posted February 17, 2014 Author Posted February 17, 2014 Took the OD apart so I can get at the bush in the rear - it fits easily on the old mainshaft to is VERY tight on the new one - wonder if it needs reaming out for a better fit? Quote
KeithBaker Posted March 31, 2014 Posted March 31, 2014 Back in the 70s and 80s when we were working on Triumphs,ex works WCR cars all the big Tiumphs and Stags,we came to the conclusion very quickly that the blunt end of the mainshaft was the problem that moved the two sets of splines out of kilter,so using an angle grinder cut the lead in on the mainshaft so that it is not a blunt end,this worked every time and those times were many even replacing OD units with the box still in place on the vehicle Quote
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