Allison 5sp: Transmission mount bolt size/pitch

[gmc502]

what is the size of the bolt that in the trans for the mount?looked around and couldn't find it.need to order a helicoil kit.
Thanks in advance

 

[clrussell]

12x1.5 I'm 99% sure

 

[gmc502]

12x1.5 I'm 99% sure

well,I'm sure a thanks is 99% appropriate.

 

[gmc502]

got the mount in,,man the oem one was shot.good news is the bolt holes in the tranny were not stripped like I thought,bolts torqued up nicely,liking the energy suspension mount I got from Merchant automotive.