High Revs in 5th gear

[ayshashan]

Hi
I am hoping someone can help me, I have just bought a 1993 Ford Transit Van, Swb, low top and is converted into a camper with gas cooker, fridge etc. The problem is I cannot go any faster that 50mph without the rev's being so high. I don't have a rev counter but I am scared to go over 50mph and even at 50mph the revving is screaming. This is a problem as it means we have to drive around at 40mph on motorways. We are planning to take it to Europe in the summer but would like to be able to go faster than 40mph. Can anyone tell me why this is and how we can fix it so the revs are lower?

Thanks in advance for any help

[fastmower]

Have a look at this thread:

http://fordtransit.org/forum/viewtopic.php?t=10363

and then let us know what ratio diff you have.

And what engine.

It should be a fair bit quicker than 40mph flat out whatever diff it has - have you had a noisy old Transit before? Maybe it's just that you're not used to such a racket and are actually worrying about blowing the engine up when there's no need to?

Let us know,

Andy

[Timbo]

Is the clutch slipping? If you put your foot down at 50 mph does the engine speed up but the van not go any faster?

[ayshashan]

Thanks for your reply's I will look at the diff and engine in the morning and post it. But no i haven't had a transit before so maybe I could be paranoid but it seriously sounds like it needs a 6th gear or something. When I put my foot down the van does go faster, so I don't think it is a slipping clutch.
Thanks

[MrMPuk]

If it's a 2.5Di then it will not rev past 4250rpm and will do it all day long.

[62mph]

If it's a 2.5Di then it will not rev past 4250rpm and will do it all day long.

Hi Mr Puk - This is handy to know, im suprised theres a rev limiter at 4250, as I have been upto 82mph in my 98 ex BT van and not it the rev limit but it sounds like its revving at about 9000

[MrMPuk]

If it's a 2.5Di then it will not rev past 4250rpm and will do it all day long.

Hi Mr Puk - This is handy to know, im suprised theres a rev limiter at 4250, as I have been upto 82mph in my 98 ex BT van and not it the rev limit but it sounds like its revving at about 9000

That 82 will be more like 72 on the satnav. They are just bloody loud engines.

[Northfalia]

Is it an MT75 gearbox? if you search MT75 gearbox by Dojj and Maddoldbugger these guys have changed just 5th gear on a car MT75, could this be done on a Transit gearbox using the same parts? are the raios compatable?

[oldskooler]

Is it an MT75 gearbox? if you search MT75 gearbox by Dojj and Maddoldbugger these guys have changed just 5th gear on a car MT75, could this be done on a Transit gearbox using the same parts? are the raios compatable?

myself and a mate looked into this, i had heard that a scorpio diesel mt75 had a higher 5th so we stripped a box from a scorpio scrapper i got for nought just to see and we came up with the same number of teeth as a transit mt75 we also checked. after some more checking online as far as i remember its actually the 2.3 scorpio petrol mt 75 box that had the slightly higher 5th.

[Northfalia]

Nice one, yes these guys said it was a petrol car with the higher 5th gear, and that it would loose about 300R.P.M so that would be ideal for me, are the parts between car and van MT75s interchangable?
Cheers

[MrMPuk]

This all sounds good in theory but on a low powered 2.5Di that already dies on hills you are not really onto a good thing, they just don't have the power to pull the van with a taller 5th gear.

[oldskooler]

id be thinking a 100 ps turbo di should be man enough to handle the taller 5th gear. i may consider this conversion sometime.

yes as far as i can see the car and van clusters are the same.

[Northfalia]

Mine is turbo diesel, never get that much weight in it, it will come up the big M62 hill from lancs to yorkshire fully loaded in 5th gear, think this will be ideal, fingers crossed!

[mickdee]

VERY interested in this thread.

Hope someone comes up with a solution.

Otherwise it will be a MK6 for me.

[Northfalia]

Have got Mondeo clocks fitted (Thanks Minormatt) and have noticed when you change up from 2nd to 3rd and 3rd to 4th the revcounter drops about 1,000 R.P.M But then when you change from 4th to 5th it drops less than 500 R.P.M So the 300 drop from this conversion should be about right.
Am trying to source a car gear gearbox at mo, already have a spare van box, will let you know.
Cheers