i have a 87 gxl and my front tranny mount broke well its hell finding one because they are on back order i know how to weld and was wondering if anyone has converted the stock mount to a solid mount and what they used material wise to do so.

 

Which is it, the transmission mount or the front diff mount? They're two separate things.

 

oops ha i meant diff mount sorry about that its the differential mount i was thinking if i welded the mount solid it would break somthing else so i dont know what i wanna do yes differential not tranny i was drinking some beers when i wrote this last night

 

i know what material to use i just need to know if i have to worry about ripping the subframe or breaking the differential or somthing

 

If you are going to solid mount the front of the diff, you will also want to solid mount the rear of the diff. Otherwise you will end up with a stress point as the rear of the diff wants to move while the front locks it into place. Solid mounting the rear of the diff involves machining some circular aluminum plugs that get pressed into the diff mounting ears in place of the stock rubber mounts.

Also, if you make the front mount solid, you will want to reinforce that are of the subframe. If you take a close look at it, you will see that the mounting area of the mount is very thin. It can tear off the subframe. Just weld on some 1/4" plate.

 

Aaron I already welded two strips onto my mount of 1/4 inch steel because used ones are 50 and I don't see a point in putting a used one in so I figured I would just drive easy until I can fix properly. Soi slapped it back together and its making a bit of noise it is hell to get everything to line up when there is no give (rubber bushings) I think I have to drop sub frame again tonight and tighen the front mount with impact I couldn't get it in last night and my car is my daily driver so I did what I could thabk you for your help

 

This is what I replaced my broken front diff mount with: https://www.rx7club.com/2nd-generation-specific-1986-1992-17/pinion-snubber-diff-mount-replacement-convertible-876959/.

 

you replaced the broken mount and added a snubber? as well?

 

Yes, I replaced it with the stiffer competition mount & added the snubber for additional protection from flex.