Adaptor plate for MT75 Gearbox to Essex V4/V6 Interest?

[dieselhead123]

You could be right mate, not got one of the earlier clutches here to check.

We decided to 'spec' the later units as we have them here to check dimensions with and knew that they would be easily available for years to come.

Could you confirm this mate?

TIM

[baconsdozen]

I've been reading this thread with interest.The other day I went to watch parts of an old boat hut being cut up for scrap with a water blaster,the guy also demonstrated cutting reinforced concrete with the same machine.
Absolutely incredible to watch.

[Ken B]

You could be right mate, not got one of the earlier clutches here to check.

We decided to 'spec' the later units as we have them here to check dimensions with and knew that they would be easily available for years to come.

Could you confirm this mate?

TIM

The parts book i have only covers up to 94, so cant confirm beyond that, but I'll have a check on the online QH site and see what that comes up with. The only thing I would say but I'm sure you've already thought about that; is using plates that are intended for dual mass flywheels wont work on non dual mass flywheels, well not for long anyway.

[montym100]

Looks like you will be the V4 'guinea pig' mate

Flywheel and starter will be stock parts, the ones you have at the moment.

Have you got a spare V4 flywheel on the floor mate? If so, could you provide measurement between two opposite holes where the clutch cover bolts to your flywheel?
The center plate will have to be changed as the gearbox splines are different, looks like Pinto/Mt75 Transit for the V6 flywheel and DOHC/Mt75 Sierra for the V4 flywheel, to be confirmed!

Should have another plate done for next week, just been busy at work and with the 'mini makeover' this coming weekend.

TIM

Yes i`ve got the flywheel from the spare engine but i`m away from home at the moment, when i get back on Monday i`ll take some photo`s and measurements

[knighty1981]

Tim

if I could supply you with the CAD drawings could you have a plate cut for me ?

I'm thinking merc straight six to MT75....
(so I can get the ratio right into the back axle)

my little brother is an engineer and does CAD stuff... so should be able to sort the drawings for me?

[montym100]

could you provide measurement between two opposite holes where the clutch cover bolts to your flywheel?

Tim, I get approx 250mm for the clutch cover bolt holes. Is that what you was after?


Essex V4 Flywheel

[dieselhead123]

could you provide measurement between two opposite holes where the clutch cover bolts to your flywheel?

Tim, I get approx 250mm for the clutch cover bolt holes. Is that what you was after?


Essex V4 Flywheel

Thanks for that mate, just what we need
Hopefully there will be a clutch specification posted on here soon!

We should have the third, and hopefully final, prototype adapter plate back this week, so once the weekend makeover is out of the way, I'll get right on it!

TIM

[Ken B]

If this helps you in your quest, just looked in my parts book. It does only cover up to 1994, but all Transit drive plates were 1" 23 spline. There were 4 different ones up to 1994.
As you'd expect they came in various different diameters depending on application.

8 1/2" diameter used on V4 petrol models up to 78 including the Perkins Diesel and 1.6 OHV.
9 1/2" diameter used on 2.4 Diesel from 1972 > 86. I presume the York??
9 1/2" diameter used on OHC petrols and heavy duty for Perkins Diesel/V4 models up to 86.
10 1/2" diameter Heavy duty used on 2.4 diesel including Di 85 onwards >94 Book only covers up to this year so possibly used beyond.
All plates 1" 23 spline.

Hope this is of some use.

[dieselhead123]

Hi mate, thanks for your input, nice to know that all plates have the same spline.

This does mean that the existing V4 flywheel AND clutch plate will be ok with the Mt75 transmission

Just got to sort out the clutch covers now.

TIM

[Ken B]

This does mean that the existing V4 flywheel AND clutch plate will be ok with the Mt75 transmission

In theory yes. The sticking point will be thrust bearings and clutch arms. Simple reason the Type 9 and MT boxes have deeper bellhousings than the original Transit boxes(except for the SVO 3 litre boxes). So you will need to do a bit of measuring and trial and error to see what works. Burton Power do sell thrust bearing spacers as similar problems crop up on the Zetec/Duratec conversions for the Ford cars. Of course some modern covers are much thinner than the older type, which compounds the problem.
One other problem that has cropped up occasionally, some modern clutch covers are "low lift". They dont work too well in older vehicles where there is a lot of pedal travel to operate clutch. I've had it myself where effectively you are pushing the cover fingers too far, and they jam in, resulting in no drive. Has happened to me (along with many others) on my first Zetec conversion. Again dont forget the dual mass clutch plates cant be used as most have no springs in them.

Hope this helps.
Ken

[pete.tv]

hi monty1oom
im interested in an adaptor plate for mt75 to essex v6 as i have a v6 in my mk1 transit motorhome. not sure if i need any mods the prop,and for speedo readings, any ideas.
thanks pete.

[dieselhead123]

hi monty1oom
im interested in an adaptor plate for mt75 to essex v6 as i have a v6 in my mk1 transit motorhome. not sure if i need any mods the prop,and for speedo readings, any ideas.
thanks pete.

Hi there;
you will defo need to change the gearbox cross member, or modify the one you have, a replacement speedo drive cable and a mod to the front of your prop shaft. This has been done successfully by other forum members who have fitted di's and mt75's into Mk1/2's.

Once we have the adapter plate finalised, we hope to work on these issues and provide other parts to assist with the installation, prop shafts and gearbox cross members, etc.

[dieselhead123]

This does mean that the existing V4 flywheel AND clutch plate will be ok with the Mt75 transmission

In theory yes. The sticking point will be thrust bearings and clutch arms. Simple reason the Type 9 and MT boxes have deeper bellhousings than the original Transit boxes(except for the SVO 3 litre boxes). So you will need to do a bit of measuring and trial and error to see what works. Burton Power do sell thrust bearing spacers as similar problems crop up on the Zetec/Duratec conversions for the Ford cars. Of course some modern covers are much thinner than the older type, which compounds the problem.
One other problem that has cropped up occasionally, some modern clutch covers are "low lift". They dont work too well in older vehicles where there is a lot of pedal travel to operate clutch. I've had it myself where effectively you are pushing the cover fingers too far, and they jam in, resulting in no drive. Has happened to me (along with many others) on my first Zetec conversion. Again dont forget the dual mass clutch plates cant be used as most have no springs in them.

Hope this helps.
Ken

Perhaps you can assist further with this Ken B?
Working on the V6 conversion, we were hoping to utilise the complete Pinto/Mt75 Transit clutch assembly, this would have kept the release bearing 'height' correct. Unfortunately, there is a slight difference in the clutch cover diameters, I assume that the V6 is imperial and the Pinto one metric? it would be better to avoid the need for flywheel re-drilling, so the hope is that we can utilise the Pinto/Mt75 Transit clutch center plate, this will fit the gearbox splines, with another cover the same diameter as the V6, but with 'raised' fingers that match the Pinto type.
Perhaps you would be good enough to have a look in your clutch book and see if there is anything that might do?

Thanks,
TIM

[Ken B]

Try a Sierra 4x4 clutch cover.
All the V4/V6's list one cover being 241mm diameter ironically whilst the pinto is in inches!! the Sierra XR4x4 one is listed also at 241mm dia, but different cover part number to the rest of the Vee range. A quick look on google images looks like it has bent fingers.

[dieselhead123]

Nice one mate, thanks for the info.

Looks like this will be the 'next line of attack'

TIM