Jtype OD to M40 - Page 2

amazondean · Jun 19th, 2007, 20:48

I still don't agree regarding the overdrive switch on the lid. I presume the overdrive is set up the same on an 1800s as an amazon saloon. I have had the overdrive gearbox to bits on my amazon and ended up having to pull it totaly apart as bearings and shims fell everywhere but that is another story I wish to forget. Anyway the switch on the gearbox lid is operated when the rod inside the box for fourth gear is pushed forward and the sprung loaded switch is pushed up making the contact. As soon as you come out of fourth the rod comes off the switch and overdrive is disingaged. So it is impossible for the overdrive to be still engaged when you select reverse, so there is no need for a switch to dissingage it. On the amazon there is only one switch and that is what that switch does. However I have an 1800s overdrive and gearbox sat on my garage floor and that has two switches on the lid, which I presume is for third gear, but if one swith is for disingagement then why does the amazon only have one switch which is definately for engagement only.

amazondean · Jun 19th, 2007, 20:52

Yep. I have read the posts properley now. I got the impression in the earlier thread that the switch was used to disingage. My fault for not reading properly. I could have saved myself ten minutes typing.

hairyapple · Jun 20th, 2007, 00:41

OKAY so I buy a tranny with the J OD on it which may or may not be any good....should I pay the asking price of $650 for the professionally rebuilt and lovely J OD on eBay and just make the swap or do I attempt a total rebuild of the questionable OD I already own?????????????Lets leave the questionable tranny out of it for now. On a scale of 10 the level of difficulty? Special tools? Stress level?

Pigeon · Jun 20th, 2007, 14:45

Can you define "questionable"? FWIW I've had a D apart and replaced all the bearings and it was no big deal.

amazondean · Jun 20th, 2007, 21:19

As my caption at the bottom says: There is no such thing as an easy job. Remember your gearbox could cost you your life if you get it wrong!

hairyapple · Jun 20th, 2007, 23:21

Questionable means in this instance, I buy a trans w/ J type OD that has no provenance other than what the person selling it has to say about it. Basically I wouldn't go through the trouble of installing this unit on positive sales talk alone. I hate dissapointment especially at midnight on a lonely road in Maine.

I am probably a better than average mechanic and have had apart and rebuilt a transmission from my old CJ5 Jeep, a fairly simple task. Any other suggestions?

Jun 21st, 2007, 19:35

Take the overdrive you have to pieces. The main bearings are standard, its rare for the cone clutch to wear beyond redemption. Have a good feel of the planetary gears, the Torrington bearings can fail, stick in new O rings and gaskets and usually the job is a good un

If its toast all you've lost is a few hours and you'll win some experience.

Jun 19th, 2007, 20:48	#11
amazondean amazondean Last Online: Apr 25th, 2024 19:27 Join Date: Oct 2004 Location: Nettleton Market Rasen	I still don't agree regarding the overdrive switch on the lid. I presume the overdrive is set up the same on an 1800s as an amazon saloon. I have had the overdrive gearbox to bits on my amazon and ended up having to pull it totaly apart as bearings and shims fell everywhere but that is another story I wish to forget. Anyway the switch on the gearbox lid is operated when the rod inside the box for fourth gear is pushed forward and the sprung loaded switch is pushed up making the contact. As soon as you come out of fourth the rod comes off the switch and overdrive is disingaged. So it is impossible for the overdrive to be still engaged when you select reverse, so there is no need for a switch to dissingage it. On the amazon there is only one switch and that is what that switch does. However I have an 1800s overdrive and gearbox sat on my garage floor and that has two switches on the lid, which I presume is for third gear, but if one swith is for disingagement then why does the amazon only have one switch which is definately for engagement only. __________________ 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)

Jun 19th, 2007, 20:52	#12
amazondean amazondean Last Online: Apr 25th, 2024 19:27 Join Date: Oct 2004 Location: Nettleton Market Rasen	Yep. I have read the posts properley now. I got the impression in the earlier thread that the switch was used to disingage. My fault for not reading properly. I could have saved myself ten minutes typing. __________________ 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)

Jun 20th, 2007, 00:41	#13
hairyapple Queer4Amazons Last Online: Mar 20th, 2011 15:12 Join Date: Mar 2006 Location: Redding Connecticut View Photos By: hairyapple	hairyapple sez even newer plan(or plan C) OKAY so I buy a tranny with the J OD on it which may or may not be any good....should I pay the asking price of $650 for the professionally rebuilt and lovely J OD on eBay and just make the swap or do I attempt a total rebuild of the questionable OD I already own?????????????Lets leave the questionable tranny out of it for now. On a scale of 10 the level of difficulty? Special tools? Stress level? Last edited by hairyapple; Jun 20th, 2007 at 00:44. Reason: post script

Jun 20th, 2007, 14:45	#14
Pigeon Volvo-loving biker Last Online: Feb 3rd, 2019 05:24 Join Date: Sep 2006 Location: All alone in the crazy city	Can you define "questionable"? FWIW I've had a D apart and replaced all the bearings and it was no big deal. __________________ Pigeon's Nest Be kind to pigeons

Jun 20th, 2007, 21:19	#15
amazondean amazondean Last Online: Apr 25th, 2024 19:27 Join Date: Oct 2004 Location: Nettleton Market Rasen	As my caption at the bottom says: There is no such thing as an easy job. Remember your gearbox could cost you your life if you get it wrong! __________________ 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)

Jun 20th, 2007, 23:21	#16
hairyapple Queer4Amazons Last Online: Mar 20th, 2011 15:12 Join Date: Mar 2006 Location: Redding Connecticut View Photos By: hairyapple	hairyapple sez definition of questionable Questionable means in this instance, I buy a trans w/ J type OD that has no provenance other than what the person selling it has to say about it. Basically I wouldn't go through the trouble of installing this unit on positive sales talk alone. I hate dissapointment especially at midnight on a lonely road in Maine. I am probably a better than average mechanic and have had apart and rebuilt a transmission from my old CJ5 Jeep, a fairly simple task. Any other suggestions?

Jun 21st, 2007, 19:35	#17
Fivehundred Guest Location:	Take the overdrive you have to pieces. The main bearings are standard, its rare for the cone clutch to wear beyond redemption. Have a good feel of the planetary gears, the Torrington bearings can fail, stick in new O rings and gaskets and usually the job is a good un If its toast all you've lost is a few hours and you'll win some experience.

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