AlexD Posted April 18, 2008 Author Report Share Posted April 18, 2008 Rob is going to case harden a sample and cryo treat a sample. After quizzing the transmission gurus as BAE, they all scratched their heads and asked 1) why that metal was used and 2) why they didn't case harden it. Case hardening is a little more involved, but should yield better results. We shall see. Link to comment Share on other sites More sharing options...
mark1568908316 Posted April 18, 2008 Report Share Posted April 18, 2008 From my shop,"the part number supplied to us was 31256246-5 for the collar.the (-5) I think is an indication of part number or part update (supersession)."-Mark Link to comment Share on other sites More sharing options...
z2000 Posted April 19, 2008 Report Share Posted April 19, 2008 thank you for such important information. Did you suggest I should ask to replace collar for my car? So far it is not fail. Link to comment Share on other sites More sharing options...
AlexD Posted April 20, 2008 Author Report Share Posted April 20, 2008 thank you for such important information. Did you suggest I should ask to replace collar for my car? So far it is not fail.Personally, I would not bother until it fails. The car will oprate safely as FWD car if it fails. Link to comment Share on other sites More sharing options...
pm2000541568908310 Posted April 20, 2008 Report Share Posted April 20, 2008 Personally, I would not bother until it fails. The car will oprate safely as FWD car if it fails.Unless you are coming out of a turn, on the edge, counting on some looseness to make it around, when you find yourself in a grossly overpowered Camry, headed nose first into a Jersey barrier. If I ever wind up dead from a bad street move, will you all please refrain from the " saw it coming" - "I told him so" - "thought it would happen sooner" posts. Do we know what caused the failure, other than substandard material? Specifically, what were the circumstances surounding the failure? -mk Link to comment Share on other sites More sharing options...
AlexD Posted April 21, 2008 Author Report Share Posted April 21, 2008 Mine occured when going up a steep hill, moderate acceleration (maybe 85% throttle). Link to comment Share on other sites More sharing options...
AlexD Posted April 24, 2008 Author Report Share Posted April 24, 2008 OK, the cryo treatment results are back: Because of the material Volvo used on the gear, cryo hardening didn't help much, after treatment the harness went up by a hair over 1 on the scale which the engineer called "statistically insignificant." Next step is we need to see if we can case harden, but the problem is BAE doesn't have the facility to try that (we'll see what we can do). After that I'll see if I can look into the "new" gear. Link to comment Share on other sites More sharing options...
pm2000541568908310 Posted April 24, 2008 Report Share Posted April 24, 2008 OK, the cryo treatment results are back: Because of the material Volvo used on the gear, cryo hardening didn't help much, after treatment the harness went up by a hair over 1 on the scale which the engineer called "statistically insignificant." Next step is we need to see if we can case harden, but the problem is BAE doesn't have the facility to try that (we'll see what we can do). After that I'll see if I can look into the "new" gear.Will you be busting out a batch of 10 or 20 for us just in case? How much would that cost? Link to comment Share on other sites More sharing options...
AlexD Posted April 24, 2008 Author Report Share Posted April 24, 2008 Will you be busting out a batch of 10 or 20 for us just in case? How much would that cost?Well, we could if it helped, the best thing would seem to be just using a harder material to start with. If the "new" gear is harder, then that would be the best option. Link to comment Share on other sites More sharing options...
canucklehead Posted April 26, 2008 Report Share Posted April 26, 2008 Well, we could if it helped, the best thing would seem to be just using a harder material to start with. If the "new" gear is harder, then that would be the best option.What amount of labour does it take to replace a failed collar or to replace if the newer model is indeed improved? Link to comment Share on other sites More sharing options...
AlexD Posted April 26, 2008 Author Report Share Posted April 26, 2008 What amount of labour does it take to replace a failed collar or to replace if the newer model is indeed improved?Well, you need to remove a ton of front suspension components, the drive shaft, the bevel gear unit, then try to get the collar gear off (not easy) then follow the reverse steps. I think my Volvo dealer did it in 9 hours. Link to comment Share on other sites More sharing options...
flyfishing31568908306 Posted January 23, 2009 Report Share Posted January 23, 2009 i'm generally not a bumper for the sake of it but this came up on another board and this is such a great thread i wanted others to see it and possibly add new info to it. Link to comment Share on other sites More sharing options...
AlexD Posted January 23, 2009 Author Report Share Posted January 23, 2009 Well, the update from my end on this (sorry I didn't post earlier) is that case hardening didn't actually help either. So, a new collar gear with a harder material is the only thing that would fix this. Oddly enough I cannot find this collar/sleeve gear anywhere on the XC90s angle gear which was redesigned to accept 50% more torque. Seems interesting to me? Anyone want to explore that? Link to comment Share on other sites More sharing options...
AlexD Posted February 10, 2009 Author Report Share Posted February 10, 2009 Thanks to Fernando (FEO over on swedespeed,com) I have one of the new Volvo collar gear parts, I sent it off to my engineer at BAE (British Aerospace) and he's going to see if the part is any different. The first thing I noticed is that on my previous collar gear (I have not been under there since they replaced it) there was a groove machined into the collar about in the middle of the collar, this is not there in the new one. We'll see if the metal is any different. Results hopefully by the end of the week. Link to comment Share on other sites More sharing options...
AlexD Posted February 11, 2009 Author Report Share Posted February 11, 2009 Sadly the preliminary results are on on the new splined collar gear that FEO from swedespeed,com sent me. The part scores in the same range in terms of harness and ductility as the failed gear that Mark sent me. Rob is determining the exact alloy but the bad news coming from the mass spectrometer is that this alloy is not "hardenable" so there is really no point in trying cryo or heat treating. So, anyone want to send me the spline / collar gear from a 2006-2007 R with the TFSC80 6 speed automatic. Link to comment Share on other sites More sharing options...
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