Have a 2-135 that I'm trying to sell.  Potential buyer wanting to know if the 1000 rpm pto can be switched to 540.  I've never switched it before and I don't have a 540 shaft for it.  I know that I can switch it on my 145 (looks about like the same deal), but I'm nervous about pulling the 4 bolts around PTO on the 135 and getting gallons and gallons of oil out the rear end if it is not changeable.  Can anybody tell me how I can find out?  I think it's a '78 or '79. Serial # is 274819-415 if it's any help.   <!-- s:roll: --><img src="{SMILIES_PATH}/icon_rolleyes.gif" alt=":roll:" title="Rolling Eyes" /><!-- s:roll: -->  <!-- s:roll: --><img src="{SMILIES_PATH}/icon_rolleyes.gif" alt=":roll:" title="Rolling Eyes" /><!-- s:roll: -->  <!-- s:roll: --><img src="{SMILIES_PATH}/icon_rolleyes.gif" alt=":roll:" title="Rolling Eyes" /><!-- s:roll: --> 

Thanks.