So you want to install a 4L80E? Learn from my mistakes (and successes!)

kiko

kiko

Greasemonkey
Apr 14, 2009
238
156
43
Ottawa, Canada
#23
Great info! Much appreciated! This thread has been dormant for a while -- let's hope someone is still watching... :unsure: 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 tranny?

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!
 
8

81cutlass

Royal Smart Person
Feb 16, 2009
1,399
1,691
113
Western MN
#24
454GrandPrix

454GrandPrix

Master Mechanic
Jul 27, 2016
378
671
63
Lehi, Utah
#25
1. Would the tunnel space <of my 1983 car> be the same?
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.

2. Would I need to change the flex plate? (mine is a GM 14"; 168-tooth; external balance; dual bolt pattern)
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. ;)

3. Any thoughts on new converters?
I think they're great if you're looking for a way to spend more money. I just re-used my stock one. My cam isn't aggressive enough to demand an upgraded one. YMMV.

4. I have a B&M QuickSilver Shifter -- any issues with adapting it to this electronic tranny?
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.

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kiko

kiko

Greasemonkey
Apr 14, 2009
238
156
43
Ottawa, Canada
#27
Thanks so much for taking the time to go thru my list of questions and provide such informative responses! Much appreciated! (y)

Good luck with your build and keep posting -- It's always interesting to read!!
 
F

focused313

Master Mechanic
May 1, 2014
300
299
43
#28
glad I saw this thread. The $2000+ people want around here to build a 2004r sounded like a bit much.
 
L

livingez123

Not-quite-so-new-guy
Jul 9, 2018
5
1
3
#29
I had to chuckle while reading this.
 
K

ken87cutlass

Not-quite-so-new-guy
Apr 24, 2014
17
0
1
Evansville, IN
#30
Any word on the Winters Shifter install?

I'm contemplating putting one in my 87 Cutlass. Really wanting to know if I can keep my stock console without cutting it up too much
 

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