1987 r30 trans crossmember

[gmcdeadhead]

would anybody no if the trans crossmember in a 1987 r30 is the same for a 4-speed manual and a turbo 400. ? are they the same or no? thanks

[gmcdeadhead]

bump

[SCOTI]

Send a PM to TXFirefighter. He's the only guy I know for sure that has a C30 square dually w/3 pedals & is under these trucks enough to know if the manual trans x-member is different.

[Tx Firefighter]

I can get you pics of my manual trans crossmember, but I can't vouch for it being the same as an auto crossmember. It looks just like a typical auto crossmember though.

[v30crewcab]

should be the same. only difference I know of is the year difference between the short and tall foot on the 4x4 stuff. diff crossmember for short and tall.

[gmcdeadhead]

i have a crossmember from my 87 parts truck that was a manual , i want to use it in my 66 for when i do the th400 conversion swap. just wanted to no if there the same so i dont have to buy another one. i might just have to change the rubber mount

[Tx Firefighter]

I'd suspect you should measure the height of the crossmember webs. Literature says the r30 trucks have taller frames than other trucks.

[KQQL IT]

I was under a 91 3500 with a 350 and a 4 speed
Looked very similar. Without a tape measure I couldn't be a 100%

Im using a 3/4 ton x member in my 1/2 ton. Had to notch the center for the mount. Made room to tuck 3" dual exhaust.

[SCOTI]

Originally Posted by Tx Firefighter

I'd suspect you should measure the height of the crossmember webs. Literature says the r30 trucks have taller frames than other trucks.

This is correct. The extensions from the base x-member are taller to compensate for the C20/C30 frame rails that are 2" taller. I used an aftermarket C10 x-member & had to add 2" to the height where it attaches to the rails.