hi i currently have a saloon 2.5 v6 manual but the bottom end has seized so i got a 3.0 v6 automatic and was wonderin if i can fir the 3.0 with my manual gear box

no, it would not handle the torque. You would need a R28 manual box, or AR35 Auto

any idea how much for manual gear box and where can i can get 1

R28 manuals are not common, infact quite rare. xplod cars is a good source, keep an eye on the parts section for one being broken.

thanks m8 i'll try keep eye out

I would have said it's far less critical with a manual box and you'd probably be OK with the one you have. 3.0 manuals did have the R28 box but if I were in your boots I would see how the R25 goes rather than replace it with an unknown 2nd hand R28.

Now, if it's an automatic gearbox then it's a totally different matter because the clutches are proportioned for a design torque and if it's exceeded the box will die in short order.

Kevin

Didnt know that the R25's couldn't handle the torque.

I know that the automatic AR25's are a no-no though. :-?

i thought the R25 could not handle any more than 190/200bhp?

tunnie wrote on 17. Nov 2009 at 17:06:

i thought the R25 could not handle any more than 190/200bhp?

Its related to torque not bhp

Dont forget you need to add the spiggot bearing to the auto engine (which wont have one)

Marks DTM Calib wrote on 17. Nov 2009 at 17:24:

tunnie wrote on 17. Nov 2009 at 17:06: i thought the R25 could not handle any more than 190/200bhp? Its related to torque not bhp Dont forget you need to add the spiggot bearing to the auto engine (which wont have one)

How much torque can the R25 handle then? I always thought a 3.0 would kill an R25 eventually, but much more slowly than the AR25.

tunnie wrote on 17. Nov 2009 at 17:31:

How much torque can the R25 handle then? I always thought a 3.0 would kill an R25 eventually, but much more slowly than the AR25.

250nm if the same naming convention applies. Which tallies with the 3.2 not having a manual option (290nm torque o/p IIRC).

In a manual gearbox you are only talking about the gears, the shafts they run on and the bearings and bushes that locate them. They'll wear slightly quicker with higher torque but will probably still give a reasonable life expectancy unless abused.

In an autobox, on the other hand, extra torque overcomes the friction in the clutches with every change causing much more rapid wear.

Kevin

Kevin Wood wrote on 17. Nov 2009 at 17:38:

tunnie wrote on 17. Nov 2009 at 17:31: How much torque can the R25 handle then? I always thought a 3.0 would kill an R25 eventually, but much more slowly than the AR25. 250nm if the same naming convention applies. Which tallies with the 3.2 not having a manual option (290nm torque o/p IIRC). In a manual gearbox you are only talking about the gears, the shafts they run on and the bearings and bushes that locate them. They'll wear slightly quicker with higher torque but will probably still give a reasonable life expectancy unless abused. In an autobox, on the other hand, extra torque overcomes the friction in the clutches with every change causing much more rapid wear. Kevin

I thought the numbering system was the same, but did not dare say  ;D  :-[

Cheers for the clarfication Kev  :y