Swapping wheezy 4.2 liter V6 for brawling 408 cubic inch V8 stroker!
Senior Member
Joined: Sep 2019
Posts: 131
Likes: 6
I'm ignorant about this, but I strongly suspect anything w a BIG V8 will have a few small buttresses welded in that are missing in something with a 4.2. Crawl under a few, with your camera. The 7700 had frame reinforcement that the 150 didn't have... And the 250 even more. If this falls apart and someone behind you is badly hurt, there goes your house.
It is the "weak link". I originally figured I would have to replace it and was encouraged by the posts at the T-Bird Super Coupe site. Some people said things similar to the guy that Procharged the 5.4, having gone thru multiple numbers of them (three was the number mentioned by a T-Bird guy).
I wondered, why would you keep replacing it wit hthe same trans if they were breaking?
If (when?) the tranny breaks, I'll put in something more robust, like a TKX, but the guys on the T-Bird site said that if you don't put high shock loads on the trans (like clutch drops and power shifts) it will survive.
The 8.8 in my truck is an open dif (have plans to buy a helical conversion kit). So one thing at a time.
If the trans breaks first I'll buy that first.
I wondered, why would you keep replacing it wit hthe same trans if they were breaking?
If (when?) the tranny breaks, I'll put in something more robust, like a TKX, but the guys on the T-Bird site said that if you don't put high shock loads on the trans (like clutch drops and power shifts) it will survive.
The 8.8 in my truck is an open dif (have plans to buy a helical conversion kit). So one thing at a time.
If the trans breaks first I'll buy that first.