Great info! Much appreciated! This thread has been dormant for a while -- let's hope someone is still watching... I hope that this won't be considered as "high jacking".
I was considering replacing my 700R4 with a beefed-up 4L60E due to the form-fit factor -- no mods required. However, after some research, I'm now leaning towards a 4L80E because of the 454BB and the new rear end that I just put in (Chassisworks FAB9 with Strange 3.70). I need some guidance...
Since you have a very similar setup to what I'm looking for, I'd appreciate your input (and anyone else's for that matter). However, my car is a bit different -- it's a 1983 model.
1. Would the tunnel space be the same?
2. Would I need to change the flex plate? (mine is a GM 14"; 168-tooth; external balance; dual bolt pattern)
3. Any thoughts on new converters?
4. I have a B&M QuickSilver Shifter -- any issues with adapting it to this electronic transmission?
Again, no intentions to derail your thread, but maybe some others with later G-Bodies will benefit as well. I follow your build with interest and wish you luck!
If using specific 1999 and up 80e's, the longer rear fitting is required for the trans cooler. If you have a 99+ 80e and arent using the long fitting there are many people that report burning up the trans in 200 miles.
I am just guessing, but probably so. There was no transmission option for 1983 which is significantly larger than any offered in 1980, so I doubt the doghouse would have been reshaped at all. Just saw the ears off and you'll probably be fine.
I have had flexplates break on me in the past (such as when I was drag racing my turbo Caravan), so out of habit I always install a new one every time I separate my engine and transmission. This means I installed a new one when I did my swap. Does it spec out the same as the one on your 700R4? I don't know for certain. But even if it does spec out the same, I'd replace it.
I would expect it to operate the transmission just fine. Heck, I'm currently using one off a FWD Grand Prix. Anything that moves the little shift lever in the correct direction and distance ought to be fine.
BTW: a co-worker recently turned me on to the Winters Sidewinder shifter. I have decided I am going to put one in my car so I can finally properly engage every gear as I desire.