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[zirk]

In a 3.0 set up with the correct Diff, both the Manual (3.7) and the Auto (3.9) will run around the 2625 to 2650 RPM mark at 70MPH allowing for some Speedo error, your probably find your 70MPH is actually around 67/68 in true speed as the speedo's tend to read high, even on the Ex Police with Calibrated Speedo's they run around the same RPM at a tue speed of 70.

What I can tell you is if you run a Manual set up with a Auto diff (3.9) on the 3.0 setups you be doing around 3000RPm at 70, which is a tad anoying on a Motorway Cruise IMHO.

I cant remember now if the 2.5 (never owned one) had the same 5th gear ratio as the 3.0's, seem to remember hearing the very early ones were and the later prior to going to 2.6 were slightly different.

Here you go, just checked my hand written Notes from a few years back -

PFL 1994 to 1997/8
 2.5 Manual 5th Gear Ratio 0.85 Diff 3.7
 3.0 Manual 5th Gear Ratio 0.81 Diff 3.7

MFL 1997 to 2000
 2.5 Manual 5th Gear Ratio 0.85 Diff 3.7
 3.0 Manual 5th Gear Ratio 0.81 Diff 3.7

FL 1999 to 2000/1
 2.5 Manual 5th Gear Ratio 0.85 Diff 3.9
 3.0 Manual 5th Gear Ratio 0.81 Diff 3.7

FL 2000 to 2003
 2.6 Manual 5th Gear Ratio 0.85 Diff 3.9
 3.2 Manual 5th Gear Ratio 0.81 Diff 3.7

[Kevin Wood]

Thanks

I do agree all the spare gearboxes I have are marked r25-r25.

Is that a cast-in marking, though? The casing will be common to both, so it probably has (had?) a metal tag or sticker on it indicating the actual spec. Either way, plenty of 3.0/3.2 manual conversions have used the R25 without issue so it's not worth worrying about.

[GrahamT]

Thanks

I do agree all the spare gearboxes I have are marked r25-r25.

Is that a cast-in marking, though? The casing will be common to both, so it probably has (had?) a metal tag or sticker on it indicating the actual spec. Either way, plenty of 3.0/3.2 manual conversions have used the R25 without issue so it's not worth worrying about.

It is in the casting. I should have said R25-R28.

Thanks               

[olm]

From memory - the flywheels are interchangeable, but the spigot bearing on the end of the crank will need swapping for your manual one.

Do you know the reference of this? I´m in the same situation as GrahamT

[Migv6 le Frog Fan]

I don't, but hopefully someone who does we come along. 

[olm]

I don't, but hopefully someone who does we come along. 

Thanks, I believe find it, is this?

https://www.ebay.co.uk/itm/Vauxhall-FRONTERA-OMEGA-CARLTON-SENATOR-CRANKSHAFT-NEEDLE-SPIGOT-BEARING-NEW/171235003370

[LC0112G]

The crank needle bearing on manual Carltons/Sentors is VX-90105743 / OP-6-14-706. The same part number is listed against X25XE, Y26SE, X30XE and Y32SE.

On Carltons its a bu99er to get out. I usually end up using an M12 tap, tapping it into the bearing and then pulling it out. Others say pack it with grease and then drift it out. Every time I've tried that I just end up covered in grease.