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[JamesV6CDX]

Here is the downside of manual converting...

My revs seem VERY high when cruising at motorway speeds in 5th.

If you want to make good progress, the economy is non existant on the motorway

Anything I could do with the Diff to improve this? 

[Andy B]

......

Anything I could do with the Diff to improve this? 

Aren't the diff ratios different between auto & manual ...... 

[JamesV6CDX]

......

Anything I could do with the Diff to improve this? 

Aren't the diff ratios different between auto & manual ...... 

I was under the impression the manual diff would make it rev even higher, I may be wrong....

The only other point to note, is that I have some play, somewhere. Can't work out if it's box, or DMF

Most noticable at higher speeds, if you let off the gas at say, 70mph, a couple of seconds later it feels like some slack is taken up, and there is a little "tug" in the drivetrain. Then when you re-apply the gas, there is a another jerk, as the drive is taken up again.. 

Now the novelty has worn off, I am finding myself getting cross with the manual box a little more often... it has a long throw, and to get a smooth gearchange you do have to take a little time, which loses lots of power... I reckon realistically, I could get away easier in the auto, even though it is a beast in manual form... 

[serek]

Here is the downside of manual converting...

My revs seem VERY high when cruising at motorway speeds in 5th.

If you want to make good progress, the economy is non existant on the motorway

Anything I could do with the Diff to improve this? 

maybe you drive to fast ??
btw if you get diff of early 3.0 manual then your revs will drop down by 300rpm at 5th gear
what sort of rpm you have at 70 on 5th gear at the moment??

[tidla]

I thought you was going to say you cant eat a bigmac while driving.

[JamesV6CDX]

Here is the downside of manual converting...

My revs seem VERY high when cruising at motorway speeds in 5th.

If you want to make good progress, the economy is non existant on the motorway

Anything I could do with the Diff to improve this? 

maybe you drive to fast ??
btw if you get diff of early 3.0 manual then your revs will drop down by 300rpm at 5th gear
what sort of rpm you have at 70 on 5th gear at the moment??

Possibly Serek!

At 80mph, it's sat half way between 3000 and 3500 rpm...

[Andy B]

....
At 80mph, it's sat half way between 3000 and 3500 rpm...

3250 rpm ...................... 

[Andy B]

......
Now the novelty has worn off, I am finding myself getting cross with the manual box a little more often... it has a long throw, and to get a smooth gearchange you do have to take a little time, which loses lots of power... I reckon realistically, I could get away easier in the auto, even though it is a beast in manual form... 

As said many times  why have more pedals than feet? 

[JamesV6CDX]

....
At 80mph, it's sat half way between 3000 and 3500 rpm...

3250 rpm ...................... 

Yes, that. 

[serek]

....
At 80mph, it's sat half way between 3000 and 3500 rpm...

3250 rpm ...................... 

Yes, that. 

thats about right for 3.2 manual with 3.9 diff
if you want get few more MPG then go for 3.7 but wont be lot differents I try this before

[dbug]

Why not fit an autobox James 

[Andy B]

As serek says,  3.7:1 is they way to go. According to Mr Haynes it seems that the manuals are all 3.7.

[cem_devecioglu]

3.7
 
you will loose acceleration ..

[cem_devecioglu]

......

Anything I could do with the Diff to improve this? 

Aren't the diff ratios different between auto & manual ...... 

I was under the impression the manual diff would make it rev even higher, I may be wrong....

The only other point to note, is that I have some play, somewhere. Can't work out if it's box, or DMF

Most noticable at higher speeds, if you let off the gas at say, 70mph, a couple of seconds later it feels like some slack is taken up, and there is a little "tug" in the drivetrain. Then when you re-apply the gas, there is a another jerk, as the drive is taken up again.. 

Now the novelty has worn off, I am finding myself getting cross with the manual box a little more often... it has a long throw, and to get a smooth gearchange you do have to take a little time, which loses lots of power... I reckon realistically, I could get away easier in the auto, even though it is a beast in manual form... 

you will get used to it.. but if you really want a short shift ,  you need a sports tranny and lots of work

[05omegav6]

3.7
 
you will loose acceleration ..

Pish

My ex plod 3.2 manual, running its original gearbox and 3.7 LSD will pull 0-60 in sub 7seconds, even with a slight misfire and 225k

Wheel size will make a slight difference to the cruising revs. Bear in mind that the MV6 and Elite wheels with 235/45/17 tyres have a smaller roling radius than the 225/55/16s, meaning they'll be spinning faster at any given speed

If mine was doing 3250 rpm at 80 I'd be wondering if the clutch was on it's way south

Swap the diff if it's that big a deal 

Gear changes can be done fairly swiftly, just don't rush between 2nd and 3rd, as that will really wind it up.