fblue73 Posted June 28, 2011 Report Share Posted June 28, 2011 Hello all, My 73 decided to shear its clutch taper pin a couple of months ago so while the transmission was out to replace all of the clutch stuff, i added a j type overdrive to the original 4 speed box [renewed its bearings etc while apart]. Upon reinstallation the drive shaft is a much tighter fit then before. Have others experienced this? I was able to unbolt the drive shaft originally and pull it rearward a half inch or so [comressing the sliding spline] but with the o/d it is fully compressed and then just barely can be coerced into place and bolted up to the od output flange. Need to add that the o/d was originally a volvo unit and a volvo flange but appears to be exactly like the tr o/d excepting it is a 27% o/d vs the 25. Case is the same. Thanks Quote Link to post Share on other sites
stuart Posted June 28, 2011 Report Share Posted June 28, 2011 Only thing I can think of could be the length of the Volvo flange as the propshaft is the same for all models of TR with or without O/Drive. Stuart. Quote Link to post Share on other sites
MissSpentYouth Posted June 28, 2011 Report Share Posted June 28, 2011 Did the engine come out too when you pulled the gearbox ? A bit unlikely but worth checking the engine is sitting correctly on its front engine mounts and hasn't some how been installed a half inch rewards. More likely the Volvo output shaft is a half inch longer than a TR unit I am no expert though. Is the TR flange held on with a nut or a bolt ? If a bolt then you might be able to lop a bit off the end of the output shaft depending how much thread there is. If a nut then can you shorten the TR output flange a bit ? cheers Ben Quote Link to post Share on other sites
fblue73 Posted June 29, 2011 Author Report Share Posted June 29, 2011 Supposedly there are 3 types of volvo flanges and only one that is rumoured to be identical to the TR flange--that is the one that is on the o/d unit--it could be longer than the TR unit but i do not have an actual tr flange to measure it against; only the non o/d flange that was previoulsy fitted. I havent owned a tr with overdrive in a number of years and although have rebuilt a number of j-types in the past it never ocurred to me to measure a flange. I did not pull the engine but removed the box from the interior of the car. It will work as it is but i am a bit concerned that the driveshaft cannot really compress any further if necessary. Certainly not as necessary with a fixed final drive as opposed to floating one but nevertheless would like the comfort of a correct drive shaft configuration. Quote Link to post Share on other sites
rpurchon Posted June 30, 2011 Report Share Posted June 30, 2011 Hello all, My 73 decided to shear its clutch taper pin a couple of months ago so while the transmission was out to replace all of the clutch stuff, i added a j type overdrive to the original 4 speed box [renewed its bearings etc while apart]. Upon reinstallation the drive shaft is a much tighter fit then before. Have others experienced this? I was able to unbolt the drive shaft originally and pull it rearward a half inch or so [comressing the sliding spline] but with the o/d it is fully compressed and then just barely can be coerced into place and bolted up to the od output flange. Need to add that the o/d was originally a volvo unit and a volvo flange but appears to be exactly like the tr o/d excepting it is a 27% o/d vs the 25. Case is the same. Thanks heres a picture of a new flange.also the recess on the end where prop shaft fits in is 60mm dia. saloon ones dont fit a tr propshaft. dont know about volvo richard Quote Link to post Share on other sites
fblue73 Posted June 30, 2011 Author Report Share Posted June 30, 2011 Thanks Richard. I plan to attempt to measure it tonight but it is installed in the J and attached to the propshaft...BTW, the TR propshaft flange fits the volvo J output flange perfectly including the recess and bolt holes. Quote Link to post Share on other sites
fblue73 Posted July 1, 2011 Author Report Share Posted July 1, 2011 ok, so the Volvo flange as reported appears to be identical to the Tr6...apx 32mm from back of flange to shoulder of step down where it enters the seal area of the o/d. Quote Link to post Share on other sites
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