gearbox/ final drive anoraks -- help needed 850t5r

gearbox/ final drive anoraks -- help needed 850t5r

Author
Discussion

hotrubber007

Original Poster:

55 posts

220 months

Saturday 20th November 2010
quotequote all
really happy with our 7 seater t5r

But it drinks more than our cerbera - and last week while cruising in france at 100+ i could not help but notice the LOUD high revs - over 4000 ....

The m56 is a good gearbox if with a very sloppy change. I see that the M66 ( six speed will fit) . But cannot find data about the relevant final drives. My fith gear is 0.70 - and so is the 6th gear on the M66. But as far as can establish the longest final ratio is 3.77 ? or am i wrong?
I'm thinking of a final drive of 3.21 would bring my cruise at 100+ into the 3000 revs.
saving petrol and engine. We only use the car for long drives and motorway to denmark through germany and so .....
anybody out there who has done some work here ????
regards chris

nigel mansell

2,721 posts

220 months

Saturday 20th November 2010
quotequote all
1 would buy a v70 d5 euro 3 163 bhp if only using the car for high speed long runs.

very comfy and returns 45 mpg at speed.

ilovevolvo

1,832 posts

230 months

Sunday 21st November 2010
quotequote all
hotrubber007 said:
really happy with our 7 seater t5r

But it drinks more than our cerbera - and last week while cruising in france at 100+ i could not help but notice the LOUD high revs - over 4000 ....

The m56 is a good gearbox if with a very sloppy change. I see that the M66 ( six speed will fit) . But cannot find data about the relevant final drives. My fith gear is 0.70 - and so is the 6th gear on the M66. But as far as can establish the longest final ratio is 3.77 ? or am i wrong?
I'm thinking of a final drive of 3.21 would bring my cruise at 100+ into the 3000 revs.
saving petrol and engine. We only use the car for long drives and motorway to denmark through germany and so .....
anybody out there who has done some work here ????
regards chris
Hi Chris

A few people have done the M66 change from a M56H there is many different types of M66 so be careful which one you go for a very good forum for such info from people that actually do such crazy things is www.volvospeed.com

Russ

hotrubber007

Original Poster:

55 posts

220 months

Sunday 21st November 2010
quotequote all
Cheers guys been to volvospeed
somehow can't get registered / logged
"my email has been banned"

for mr mansell - yep would do - but a newer car would also be £1350 approx fully comp.
with this 15 yrs + i get classic policy £189 ..........and the original sort or "brick square" pig ugly looks.

which m66 would be the longest gearing - diesel - ? any using a m66?

morgrp

4,128 posts

204 months

Monday 29th November 2010
quotequote all
ilovevolvo said:
hotrubber007 said:
really happy with our 7 seater t5r

But it drinks more than our cerbera - and last week while cruising in france at 100+ i could not help but notice the LOUD high revs - over 4000 ....

The m56 is a good gearbox if with a very sloppy change. I see that the M66 ( six speed will fit) . But cannot find data about the relevant final drives. My fith gear is 0.70 - and so is the 6th gear on the M66. But as far as can establish the longest final ratio is 3.77 ? or am i wrong?
I'm thinking of a final drive of 3.21 would bring my cruise at 100+ into the 3000 revs.
saving petrol and engine. We only use the car for long drives and motorway to denmark through germany and so .....
anybody out there who has done some work here ????
regards chris
Hi Chris

A few people have done the M66 change from a M56H there is many different types of M66 so be careful which one you go for a very good forum for such info from people that actually do such crazy things is www.volvospeed.com

Russ
Just out of interest what would you say the average MPG is on it? Just interested because I run the same car

hotrubber007

Original Poster:

55 posts

220 months

Tuesday 28th December 2010
quotequote all
sorry my mind went elsewhere

i'm getting 16-18 mpg on a fast run - no more than 20 mpg on motorway - and less when 100 +
just met a dutch fella with an 1999 t5r, he said about 12liters per 100 k'
That's like another tally all together. My engine must not be running rigth.
Hamish at Broomgrove Hls tuning just set it up - and gave it the all clear 1500 miles ago..

still looking at that m66 with a gripper diff ( long long ratio )

smack

9,738 posts

197 months

Tuesday 28th December 2010
quotequote all
I get 31-32mpg on my work runs in a manual 850R, which is mostly motorway outside rush hour, and opening it up when I can.

Your economy doesn't sound very good.

Stedman

7,281 posts

198 months

Wednesday 29th December 2010
quotequote all
hotrubber007 said:
sorry my mind went elsewhere

i'm getting 16-18 mpg on a fast run - no more than 20 mpg on motorway - and less when 100 +
just met a dutch fella with an 1999 t5r, he said about 12liters per 100 k'
That's like another tally all together. My engine must not be running rigth.
Hamish at Broomgrove Hls tuning just set it up - and gave it the all clear 1500 miles ago..

still looking at that m66 with a gripper diff ( long long ratio )
This is your issue.