well this is the 2nd rear subframe ive broken well, actually that damn tab and now i need to fix it once and for all.. im out of ideas to keep this diff in place under launch..anyone have probs like this? what about ideas to rig up?

 

Man, I had an extra one, but I threw it out. Sorry bout that.

 

Why not get some flat steel from Home Depot or Lowe's and reinforce it on both sides? (Read welding) Seems like you've got enough thread there to cover the extra width.

 

try using a thicker retaining bracket

 

run rubber mounts, so it breaks that instead.... or run crap tires...

or weld the piece that isnt pictured directly onto there???

 

If the sub frame is junk, grind the old one off and make your own, or have a shop do it. Then weld the new bracket onto the old sub frame

 

**** take some bed rails (angle iron) and weld a L-brace... That's what I did and it hasn't even come close to breaking... Oh and try slipping the clutch a little when you launch... Wheel hop is what breaks a subframe mount...

 

Do you have the pinion snubber installed also?

 

Diff mount snapped right off of the subframe. The diff mount didn't break it actually took a chunk of the part it was attached to off! A shop welded it back on and then reinforced it with some steel which was also welded on too. It's been four years now and no problems, but I forgot how the hell it was done....

 

I've broke one of those with a mear 240whp, they suck ***, I'll be welding in some angle iron in the near future.

 

I think that is the answer. A pinion snubber will take a LOT of pressure off the sub-frame and keep it from flexing.

 

i put a rubber snubber from autozone never broke one again

 

No i do not have a snubber installed, anyone got pix or anything? i need to fix this issue. my car is cursed with it!

 

Have you looked into an engine brace? Those also reduce the wheel hop backlash onto the frame and provide easier shifting due to reduced tranny flex. Anyone else have that horrible 1st to 4th shift problem? (Damn crap engine mounts.)

 

I haven't been able to find a used one yet, so nope...

 

Here you go for all your pinion snubber needs!

Thanks amur!

https://www.rx7club.com/showthread.p...pinion+snubber

 

Slammedblk7 - I don't think anyone suggested it yet, but you can re-use your now-broken front mount. Weld it into one piece (and make sure you get the gap right.) You'll get more 'road noise' from it, but just go with a single exhaust and you won't hear it much.

 

Well what i think is causing alot of stress is my solid diff mount, not allowing any slack. Noise and vibration is nothing new to me with solid engine mounts and a one piece N1 single.

 

i have a solid one and i cant deal with the funky noise that it makes I HATED!!!!!!!!