Help required to fit overdrive gearbox - Page 2

tonydgray · Apr 17th, 2012, 10:53

Quote:

Originally Posted by arcturus

A lightened flywheel could result in a less steady tickover

Thanks arcturus, anyone got any ideas on the dowels though?

arcturus · Apr 17th, 2012, 13:25

It may be that the dowels are not strictly necessary. They may be there only to help line up bolt holes. If you're sure you dom't need them just grind them off.

tonydgray · Apr 20th, 2012, 09:50

As always, thanks for the help.

Right, the dowels came out of the bellhousing with a gentle bit of persuasion so all good there. I'm crossing my fingers that I can pick up the shortened prop tomorrow and I can then test the everything fits together. At the moment the bellhousing, gearbox with overdrive are all in place so I should be able to see what alterations need to be made to the crossmember. I am going to hold off doing anything until I bolt up the propshaft and bearing carrier so I'm 100% on the actual vertical position of the gearbox. I'm currently unsure of the following:

1. The original crossmember bolts via a rubber mounting to a bracket on the rear of the gearbox (old gearbox is an M40). Is a gearbox with overdrive unit (in my case an M410) still supported in the same place, for example in this instance at the rear of the gearbox.

2. It was mentioned before that there are crossmember mounting holes further back on the chassis, should I be thinking of using these at all.

Cheers

Tony

WPR678B · Apr 20th, 2012, 17:38

I have all this to come yet so look forward to the replies you get.
I haven't got as far as you yet and am dreading the crossmember hurdle when i come to it!
I know my gearbox assembly did have the bracket and rubber mount on the rear of the gearbox so i am presuming that they mount in a similar way, but i do know that a different rubber is listed for the overdrive cars so their must a something somewhere that isn't the same!
I have a crossmember from an Amazon that had the D type set up that i am trying to fit, so hopefully that will be of help when i get the 2 side by side to look at!

john h · Apr 20th, 2012, 18:11

I have a M410 164 crossmember off the car if photos would be of any help?

Also, I am part-way through moving to a new workshop, so I am hopeful that with relocating most of my parts, my other crossmember will turn up. This is a 164 M400 cross-member which I modified to fit the overdrive gearbox.

If I find it, the modified crossmember is promised to Carlo (WPR678B), but maybe he'd lend it to you Tony, to test fit and make a copy?

John

WPR678B · Apr 20th, 2012, 20:03

I'm sure we can sort something out between us all.
Let's hope it turns up now!

WPR678B · Apr 21st, 2012, 22:32

Right, i've had a crawl around underneath the car today and measured everything up and unless i am missing something, it appears the existing crossmember i have got fitted (original to the car as far as i know) should take the M41 and overdrive unit fine!?
Dimensionally from the backplate of the engine to the mounting for the rubber it is the same on both my standard 4 speed box and the overdrive box.
The Amazon crossmember that had an M41 + overdrive on is WAY to small for sure!

940_Turbo · Apr 21st, 2012, 22:35

It won't, 140 crossmember is overdrive specific. 120 series is not.

WPR678B · Apr 21st, 2012, 22:57

Quote:

Originally Posted by 940_Turbo

It won't, 140 crossmember is overdrive specific. 120 series is not.

Do you know where the difference lies then please?
The only thing that could possibly foul is the area of the overdrive unit where the drain plug is fitted from what i could see today?

940_Turbo · Apr 21st, 2012, 23:00

The overdrive will foul the cross member. It can be mnade to work by altering the cross member, but it isn't a straight bolt up.

Apr 17th, 2012, 13:25	#12
arcturus arcturus Last Online: Today 07:24 Join Date: Mar 2006 Location: Sagres Portugal	It may be that the dowels are not strictly necessary. They may be there only to help line up bolt holes. If you're sure you dom't need them just grind them off. __________________ life's too short to drink bad wine Last edited by arcturus; Apr 17th, 2012 at 13:28.

Apr 20th, 2012, 09:50	#13
tonydgray Member Last Online: Feb 19th, 2024 11:19 Join Date: Sep 2010 Location: Atworth	How on earth is the cross member going to fit!! As always, thanks for the help. Right, the dowels came out of the bellhousing with a gentle bit of persuasion so all good there. I'm crossing my fingers that I can pick up the shortened prop tomorrow and I can then test the everything fits together. At the moment the bellhousing, gearbox with overdrive are all in place so I should be able to see what alterations need to be made to the crossmember. I am going to hold off doing anything until I bolt up the propshaft and bearing carrier so I'm 100% on the actual vertical position of the gearbox. I'm currently unsure of the following: 1. The original crossmember bolts via a rubber mounting to a bracket on the rear of the gearbox (old gearbox is an M40). Is a gearbox with overdrive unit (in my case an M410) still supported in the same place, for example in this instance at the rear of the gearbox. 2. It was mentioned before that there are crossmember mounting holes further back on the chassis, should I be thinking of using these at all. Cheers Tony

Apr 20th, 2012, 17:38	#14
WPR678B Ex 145 owner Last Online: Oct 28th, 2023 16:26 Join Date: May 2007 Location: Dorset	I have all this to come yet so look forward to the replies you get. I haven't got as far as you yet and am dreading the crossmember hurdle when i come to it! I know my gearbox assembly did have the bracket and rubber mount on the rear of the gearbox so i am presuming that they mount in a similar way, but i do know that a different rubber is listed for the overdrive cars so their must a something somewhere that isn't the same! I have a crossmember from an Amazon that had the D type set up that i am trying to fit, so hopefully that will be of help when i get the 2 side by side to look at! __________________

Apr 20th, 2012, 18:11	#15
john h VOC Member Last Online: Yesterday 17:34 Join Date: Jan 2007 Location: Huddersfield View Photos By: john h	I have a M410 164 crossmember off the car if photos would be of any help? Also, I am part-way through moving to a new workshop, so I am hopeful that with relocating most of my parts, my other crossmember will turn up. This is a 164 M400 cross-member which I modified to fit the overdrive gearbox. If I find it, the modified crossmember is promised to Carlo (WPR678B), but maybe he'd lend it to you Tony, to test fit and make a copy? John __________________ XX

Apr 20th, 2012, 20:03	#16
WPR678B Ex 145 owner Last Online: Oct 28th, 2023 16:26 Join Date: May 2007 Location: Dorset	I'm sure we can sort something out between us all. Let's hope it turns up now! __________________

Apr 21st, 2012, 22:32	#17
WPR678B Ex 145 owner Last Online: Oct 28th, 2023 16:26 Join Date: May 2007 Location: Dorset	Right, i've had a crawl around underneath the car today and measured everything up and unless i am missing something, it appears the existing crossmember i have got fitted (original to the car as far as i know) should take the M41 and overdrive unit fine!? Dimensionally from the backplate of the engine to the mounting for the rubber it is the same on both my standard 4 speed box and the overdrive box. The Amazon crossmember that had an M41 + overdrive on is WAY to small for sure! __________________

Apr 21st, 2012, 22:35	#18
940_Turbo . Last Online: Jul 14th, 2013 14:28 Join Date: Dec 2009 Location: MK	It won't, 140 crossmember is overdrive specific. 120 series is not.

Apr 21st, 2012, 23:00	#20
940_Turbo . Last Online: Jul 14th, 2013 14:28 Join Date: Dec 2009 Location: MK	The overdrive will foul the cross member. It can be mnade to work by altering the cross member, but it isn't a straight bolt up.

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