Getting the overdrive back on.

amazon69 · Jan 15th, 2007, 22:45

Hello,
Hope someone can help me here. Have spent a while wrestling with
an m41 and j type o/d, trying to put them back together. Cannot do it, will not go all the way down the shaft. What am I missing? O/D seems to sit on the cam, and not push onto the large spring loaded whatnot (Volvo term)
Gearbox and o/d both out of car, so was able to have a good wiggle, push,swear, push, swear, wiggle, swear. No go.
Any tips?
Thanks a lot for any help. Baz, got any ideas?

Dave

Pigeon · Jan 16th, 2007, 01:18

Hah, yes, the manual says you ought to be able to just slide it all together but it doesn't work like that...

When I converted my Amazon to overdrive the unit I got didn't work, which turned out to be because someone else had had this problem and tried to overcome it by force... the pump piston was bent and the barrel was split all down one side...

My method was to loop a piece of wire through the roller carrier on the end of the pump piston, lead it out through the gap between gearbox and overdrive, and use it to pull the pump piston down at the critical moment. Move the overdrive just a tad further on so the cam overlaps the roller, and pull the piece of wire out just before it gets trapped

amazondean · Jan 16th, 2007, 17:08

Hi. I parted the overdrive from the gearbox once as well. It said in the manual undo the bolts and slide out. Except once you undo the bolts there is a lot of play available and cutting a long story short I had one of the syncromesh springs shoot out, this led to eventualy stripping the gearbox, then about 6 million roller bearings and shims fell out all over the garage floor. I had to strip the gearbox of everything and start again. An even longer story cut short I eventualy managed single handed and without the use of special tools needed managed to get it all back together but it almost finished me off and I swore never ever to separate the overdrive from the gearbox again. Trying to keep everything in place when you slide the shaft that goes through the main shaft without any rollers or thrust washers falling out was almost impossible.

Good luck.

amazon69 · Jan 17th, 2007, 19:54

er, thanks....
Full of confidence now

Jan 15th, 2007, 22:45	#1
amazon69 Premier Member Last Online: Today 17:14 Join Date: Jan 2006 Location: Falmouth	Getting the overdrive back on. Hello, Hope someone can help me here. Have spent a while wrestling with an m41 and j type o/d, trying to put them back together. Cannot do it, will not go all the way down the shaft. What am I missing? O/D seems to sit on the cam, and not push onto the large spring loaded whatnot (Volvo term) Gearbox and o/d both out of car, so was able to have a good wiggle, push,swear, push, swear, wiggle, swear. No go. Any tips? Thanks a lot for any help. Baz, got any ideas? Dave __________________ Falmouth, Cornwall. 1970 California white 131.

Jan 16th, 2007, 01:18	#2
Pigeon Volvo-loving biker Last Online: Feb 3rd, 2019 05:24 Join Date: Sep 2006 Location: All alone in the crazy city	Hah, yes, the manual says you ought to be able to just slide it all together but it doesn't work like that... When I converted my Amazon to overdrive the unit I got didn't work, which turned out to be because someone else had had this problem and tried to overcome it by force... the pump piston was bent and the barrel was split all down one side... My method was to loop a piece of wire through the roller carrier on the end of the pump piston, lead it out through the gap between gearbox and overdrive, and use it to pull the pump piston down at the critical moment. Move the overdrive just a tad further on so the cam overlaps the roller, and pull the piece of wire out just before it gets trapped __________________ Pigeon's Nest Be kind to pigeons

Jan 16th, 2007, 17:08	#3
amazondean amazondean Last Online: Apr 25th, 2024 19:27 Join Date: Oct 2004 Location: Nettleton Market Rasen	overdrive Hi. I parted the overdrive from the gearbox once as well. It said in the manual undo the bolts and slide out. Except once you undo the bolts there is a lot of play available and cutting a long story short I had one of the syncromesh springs shoot out, this led to eventualy stripping the gearbox, then about 6 million roller bearings and shims fell out all over the garage floor. I had to strip the gearbox of everything and start again. An even longer story cut short I eventualy managed single handed and without the use of special tools needed managed to get it all back together but it almost finished me off and I swore never ever to separate the overdrive from the gearbox again. Trying to keep everything in place when you slide the shaft that goes through the main shaft without any rollers or thrust washers falling out was almost impossible. Good luck. __________________ There are only two things in life that is easy. One's lying down and the other is handing your credit card over. everything else has a degree of skill. Volvo 850 TDI, 850 TDI, 850 TDI Volvo V70 TDI, V70 TDI, Volvo V70 XC, (99)

Jan 17th, 2007, 19:54	#4
amazon69 Premier Member Last Online: Today 17:14 Join Date: Jan 2006 Location: Falmouth	er, thanks.... Full of confidence now __________________ Falmouth, Cornwall. 1970 California white 131.

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