stalled auto or 6 speed swap?
Thread Starter
On The Tree
Joined: Jul 2012
Posts: 189
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stalled auto or 6 speed swap? Figured I'd get everyones opinion on this. I'm debating to rebuild/beef up my 4L60E and put a nice stall in it or just swap it over to 6 speed. Its gonna cost roughly the same either way, 6 speed swap may be cheaper. I think I'd be happy with a manual 6 speed cause they are fun to drive, more reliable. I've never been in a car with a stall tho and everyone on here seems to love them. I maybe run my car at the track 2-3 times a year, which is where an auto would be better, but its mainly a weekend cruiser.
I would just stick with auto, yes manuals are more fun no doubt but are more hassle to keep up with in my opinion. A 4000 stall as the members above 
I would agree with. I have got on in a few trucks and cars with that size of stall and they work great!
I would agree with. I have got on in a few trucks and cars with that size of stall and they work great! Thread Starter
On The Tree
Joined: Jul 2012
Posts: 189
Likes: 0
Ive been looking around and a midly built 4L60E is gonna run about 1600, then about 800 for a good stall. Theres a local guy that says he can build the trans, about 450hp rating for 1250. Comes dyno tested but no real warranty.
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I was in the same situation and went the 6 speed route. I haven't looked back since. Not that a stalled auto is bad. I'm sure my car would have been a little quicker with a 3600 stall and a built 4l60 but I enjoy driving the 6 speed and rowing the gears. Its all personal preference, if you like to go fast consistently then go auto if you like rowing gears then go 6 speed just different strokes...
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11 Second Club
Joined: Feb 2008
Posts: 317
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From: TN
6X is a close ratio geared trans. 2nd - 5th gear match up with a close ratio 4 sp manual 1st - 4th gears. 6X's 1st gear is lower. 6X produce a lower ratio 1st gear wtih a 3.55 rear gear than a close ratio manual 4sp with 4.10 rear gear will.
Trans makes you have to rethink stall as it's gear ratios keeps the engine in it's power band, producing a lot less RPM lost between shifts. I have 4.19 ratio in 4th gear with 3.54 rear gear in my car with 6X. 132 MPH top speed in 4th, logged.
4l65/70
3.06
1.62 -- 52.94% (high) RPM Retention 47.06% RPM DROP
1.00 -- 61.73% (high) RPM Retention 38.27% RPM DROP
TCI 6X (4L80E based)
2.93
2.23 -- 76.10% (high) RPM Retention -- 23.90% RPM DROP
1.57 -- 70.40% (high) RPM Retention -- 29.60% RPM DROP
1.18 -- 75.16% (high) RPM Retention -- 24.84% RPM DROP
1.00 -- 84.745% (high) RPM Retention -- 15.255% RPM DROP
0.75 -- 75.00% (high) RPM Retention -- 25.00% RPM DROP
Below are computer modeling of car with 4L65 trans and a 3.70 Rear end with 3000 RPM Stalled converter, and below it is same combination only change is going to 6X trans. Look at RPM 4L65 sift into 3.70 1:1 gear ratio, while the 6X shifts one more time but not into 1:1 gear, but 1.18 4th gear ratio which gives you a 4.36 equivalent rear ratio. The 6X's 4th gear mechanical advantage along with it's lower RPM lost between shifts over the 4L65 produces better times.
4L60/65
4L60E
60' = 1.819
1/8 mile = 7.864
1/8 mile (mph) = 91.0
1/4 mile = 12.279
1/4 mile (mph) = 112.3
0-60 = 4.11 secs
0-100 = 9.81 secs
6X
60' = 1.830
1/8 mile = 7.709
1/8 mile (mph) = 93.0
1/4 mile = 11.95
1/4 mile (mph) = 115.8
0-60 = 3.76 secs
0-100 = 8.90 secs
3.06
1.62 -- 52.94% (high) RPM Retention 47.06% RPM DROP
1.00 -- 61.73% (high) RPM Retention 38.27% RPM DROP
TCI 6X (4L80E based)
2.93
2.23 -- 76.10% (high) RPM Retention -- 23.90% RPM DROP
1.57 -- 70.40% (high) RPM Retention -- 29.60% RPM DROP
1.18 -- 75.16% (high) RPM Retention -- 24.84% RPM DROP
1.00 -- 84.745% (high) RPM Retention -- 15.255% RPM DROP
0.75 -- 75.00% (high) RPM Retention -- 25.00% RPM DROP
1.62 -- 52.94% (high) RPM Retention 47.06% RPM DROP
1.00 -- 61.73% (high) RPM Retention 38.27% RPM DROP
TCI 6X (4L80E based)
2.93
2.23 -- 76.10% (high) RPM Retention -- 23.90% RPM DROP
1.57 -- 70.40% (high) RPM Retention -- 29.60% RPM DROP
1.18 -- 75.16% (high) RPM Retention -- 24.84% RPM DROP
1.00 -- 84.745% (high) RPM Retention -- 15.255% RPM DROP
0.75 -- 75.00% (high) RPM Retention -- 25.00% RPM DROP
actually the 6x is a 2.97 First gear.. but whatever.. close enough...LOL
and when you make enough power... you get into 5th gear 1:1 just fine...
I actually use a 3.50 rearend... so I get the Mechanical benefits of 1st gear, and I still get reasonably low rpm for part throttle highway cruising.
and.... what the hell kind of sucky low rpm stall are you using for your data.....
try a 3600 stall..or a 4800 stall...
from the looks of your graphs, you have a 2200 stall on one, and a clutch on the other
I use the same software for playing with various combos when helping other people pick things for their car.
p.s.
I daily drive a 4800 stall... no issues, feels great... has lockup....
try a 3600 stall..or a 4800 stall...
from the looks of your graphs, you have a 2200 stall on one, and a clutch on the other
I use the same software for playing with various combos when helping other people pick things for their car.
p.s.
I daily drive a 4800 stall... no issues, feels great... has lockup....
