727 trans mount

[Sonny]

I’ve been searching for a ‘70 b body 727 trans mount on all the typical sites but can’t get verification that it fits my car. It’s a ‘70 Belvedere 318/904 car I converted to a 440/727. I assume the mount and steel mount bracket are the same for both? If so can someone point me to one that fits?

 

[PurpleBeeper]

I "think" the transmission cross member may be different small block vs. big block (SOMEBODY PLEASE CORRECT ME IF I'M WRONG).
https://www.autozone.com/drivetrain/transmission-mount/duralast-transmission-mount/108621_10594_0

 

[Sonny]

I "think" the transmission cross member may be different small block vs. big block (SOMEBODY PLEASE CORRECT ME IF I'M WRONG).
https://www.autozone.com/drivetrain/transmission-mount/duralast-transmission-mount/108621_10594_0

Mine looks like this:

 

[1967coronet440]

View attachment 686590
Mine looks like this:

Looks the same as my big block car

 

[Sonny]

When I removed the trans mount bolts, I had to dig tons of rubber out from the bolt access holes where the rubber mount failed and expanded. I’ll bet it’s so compressed that this is why my header is hitting the torsion bar! It also might explain the vibration I had off the line when I hit the gas hard. Should I spend the $50 for the prothane mount?

 

[1967coronet440]

When I removed the trans mount bolts, I had to dig tons of rubber out from the bolt access holes where the rubber mount failed and expanded. I’ll bet it’s so compressed that this is why my header is hitting the torsion bar! It also might explain the vibration I had off the line when I hit the gas hard. Should I spend the $50 for the prothane mount?

I did

 

[R/T Boy 67]

Absolutely! Most rubber mounts you buy today are pure crapola.

 

[PurpleBeeper]

View attachment 686590
Mine looks like this:

Gotcha...the transmission cross member. Yes, it does look the same as my car. Be aware that there are TWO different cross members...going from memory here... '67 & earlier vs. '68 and later I believe. The only difference was the location of the rubber mount (front/back maybe 3"-4"). If it looks like your cross member is lining up, then I believe you have the correct one.

I agree with the other guys that a polyurethane mount is worth the extra $35 or so. If you have solid motor mounts, the you don't really "need" it in my opinion, but it couldn't hurt.

 

[R/T Boy 67]

The pre 1970 crossmembers were different between auto and four speed. They moved the mounting pad on 1970 up four speeds, so there is only one trans crossmember. The 66 to 69 auto crossmembers are the same as all 70 crossmembers, except for the thru bolt sizes, I believe.

 

[Sonny]

That sucker was toast!

 

[miller]

Same type I used on my 67 727 trans. Foggy, though kinda recall it was listed for 70ish Duster/Demon A-body. Might be worth checking.