LT1 with an S trim supercharger, will 4L60E live?
07-02-2014, 09:18 AM
#1
LT1 with an S trim supercharger, will 4L60E live? I picked up a complete 1995 LT1 with an S trim supercharger on it, supposedly a 500+HP to the wheels engine. Engine is rebuilt with forged internals and tuned for an 4L60E.
I want to drop this engine into one of my project cars, should I even attempt to run the stock 4L60E trans that came with the engine? I do not plan on racing, just big smokey burnouts on the street and generally having fun with it. What are you guys doing with your transmissions? Other options I have on the shelf are going T56 or a TH400 but would like to use the 4L60E since the PCM is already setup, not sure what I would have to change to the program to go T56 ir the Th400. I could also go 4L80E, but again not sure what would be needed to change in the program or wiring. I have tuner cats and am not scared of wiring work but would need the pinouts. Any real world input?
I want to drop this engine into one of my project cars, should I even attempt to run the stock 4L60E trans that came with the engine? I do not plan on racing, just big smokey burnouts on the street and generally having fun with it. What are you guys doing with your transmissions? Other options I have on the shelf are going T56 or a TH400 but would like to use the 4L60E since the PCM is already setup, not sure what I would have to change to the program to go T56 ir the Th400. I could also go 4L80E, but again not sure what would be needed to change in the program or wiring. I have tuner cats and am not scared of wiring work but would need the pinouts. Any real world input?
07-02-2014, 10:30 AM
#5
TECH Addict
This^.
Get a good stall, have the transmission rebuilt with new performance steels and clutches, all new seals, pistons, bearings, upgrade the 3/4 pack with at least a 7 clutch pack set, performance 2/4 band, hardened sunshell, shift kit, do the input drum drill mod, and the 5 pinion gear train.
Don't forget about rear gears, the numerically higher gear will pull stress off the trans, but put it on the rear. The numerically lower gears will do the opposite.
These transmissions are stronger than people make them out to be. Upgrading the 3/4 clutch pack and the drill mod, plus the shift kit will significantly extend the life of the 3/4 gears. Upgrading the sunshell on top of that with the 5 pinion gear train significantly increases it's shock load capability. Stall it for power delivery (not good for the trans) and gear up the rear (good for the trans) and you'll have a reliable trans and a very fun car.
If you're looking for a street car, not a drag racer, get the T56 all the way! That would be an absolute blast to drive around. I love driving my T56.
The rear needs to be replaced, get a 9" or something similar in strength.
Get a good stall, have the transmission rebuilt with new performance steels and clutches, all new seals, pistons, bearings, upgrade the 3/4 pack with at least a 7 clutch pack set, performance 2/4 band, hardened sunshell, shift kit, do the input drum drill mod, and the 5 pinion gear train.
Don't forget about rear gears, the numerically higher gear will pull stress off the trans, but put it on the rear. The numerically lower gears will do the opposite.
These transmissions are stronger than people make them out to be. Upgrading the 3/4 clutch pack and the drill mod, plus the shift kit will significantly extend the life of the 3/4 gears. Upgrading the sunshell on top of that with the 5 pinion gear train significantly increases it's shock load capability. Stall it for power delivery (not good for the trans) and gear up the rear (good for the trans) and you'll have a reliable trans and a very fun car.
If you're looking for a street car, not a drag racer, get the T56 all the way! That would be an absolute blast to drive around. I love driving my T56.
The rear needs to be replaced, get a 9" or something similar in strength.
Last edited by hrcslam; 07-02-2014 at 10:37 AM.
07-02-2014, 11:09 AM
#6
Budget build. Yes I have the money to have one built but this is for a vehicle that will see maybe 2000 miles a year run time, so not worth dropping the money IMO. No stall needed, the blower cam is pretty much a smooth idle cam, very slight lope. I have a TH400 on the shelf I could use, maybe that would be the way to go, just need VSS and to find out what to reprogram. I like the idea of a 4L80E but the overdrive isnt a must have. I am building a similar truck right now, not supercharged, with the T56 at the same time so I want to make one with an automatic as well.
Trending Topics
07-02-2014, 12:15 PM
#8
yep, building two 1951 Ford F1 pickups. First one is LT1 T56, 2nd one is either the S trim LT1 automatic or a baby roots blown 427 BB chevy. I think I would rather use the LT1 if I can find a budget automatic to work with it. I am not a catalog spender, I like to do budget builds and build rather than buy.
07-02-2014, 12:35 PM
#9
TECH Addict
yep, building two 1951 Ford F1 pickups. First one is LT1 T56, 2nd one is either the S trim LT1 automatic or a baby roots blown 427 BB chevy. I think I would rather use the LT1 if I can find a budget automatic to work with it. I am not a catalog spender, I like to do budget builds and build rather than buy.
07-02-2014, 02:00 PM
#10
Really the pickup trucks are pretty light, about 3200 pounds with a typical v8 engine. There really isnt a whole lot to them. I found the pinouts for the 4L80E, and it looks like the latest version of tunercat allows flipping the logic of the one different shift solenoid. Still have to find out if there would be any programming changes.
07-02-2014, 02:43 PM
#12
TECH Addict
Really the pickup trucks are pretty light, about 3200 pounds with a typical v8 engine. There really isnt a whole lot to them. I found the pinouts for the 4L80E, and it looks like the latest version of tunercat allows flipping the logic of the one different shift solenoid. Still have to find out if there would be any programming changes.
Those trucks are lighter than thought. I knew they are lighter than our new stuff, but damn that's impressive.
Hopefully someone that has actually done the 4L80e swap will chime in. Your best bet is to ask that question in the Automatic Transmission section.
07-02-2014, 02:45 PM
#13
TECH Addict
Not sure how the 4L80e would bolt up to an LT1, they did use them behind the 454's though so I'd imagine they have a set up for it.
07-02-2014, 03:31 PM
#14
Nah no need for a transaxle setup, I plan on using these as trucks so better to stick with the leafs. I have a couple jag IRS setups on the shelf but really I see no need to use them other than for bragging rights.
4L80 will bolt up to the LT1 no problem, only difference will be the 4L80 will use a larger bolt pattern converter for a 168 tooth flexplate. LT1 runs the smaller 153, so would have to swap out the flexplate and the starter to make it work.
I have found lower mileage used 4L80s for sale, in stock form I am sure they are stronger than the 4L60E, but not sure if they are strong enough to use as is. Supposedly this thing put down 540HP to the wheels before it popped a head gasket. It has the S trim with the water tank fed intercooler. Still unsure what way to go, I have a selection of rears to use to I can always drop the rear gear down to the low 3s with a TH400, or go lower with the overdrive setup. I have a 4:10 rear I could run with a T56.
Biggest thing is I do not want to lose the engine tune, I know I will have to reflash the PCM with a T56 program but need to keep all of the mods made when the engine was tuned.
4L80 will bolt up to the LT1 no problem, only difference will be the 4L80 will use a larger bolt pattern converter for a 168 tooth flexplate. LT1 runs the smaller 153, so would have to swap out the flexplate and the starter to make it work.
I have found lower mileage used 4L80s for sale, in stock form I am sure they are stronger than the 4L60E, but not sure if they are strong enough to use as is. Supposedly this thing put down 540HP to the wheels before it popped a head gasket. It has the S trim with the water tank fed intercooler. Still unsure what way to go, I have a selection of rears to use to I can always drop the rear gear down to the low 3s with a TH400, or go lower with the overdrive setup. I have a 4:10 rear I could run with a T56.
Biggest thing is I do not want to lose the engine tune, I know I will have to reflash the PCM with a T56 program but need to keep all of the mods made when the engine was tuned.
Last edited by drptop70ss; 07-02-2014 at 03:38 PM.
07-02-2014, 04:38 PM
#15
TECH Addict
Nah no need for a transaxle setup, I plan on using these as trucks so better to stick with the leafs. I have a couple jag IRS setups on the shelf but really I see no need to use them other than for bragging rights.
4L80 will bolt up to the LT1 no problem, only difference will be the 4L80 will use a larger bolt pattern converter for a 168 tooth flexplate. LT1 runs the smaller 153, so would have to swap out the flexplate and the starter to make it work.
I have found lower mileage used 4L80s for sale, in stock form I am sure they are stronger than the 4L60E, but not sure if they are strong enough to use as is. Supposedly this thing put down 540HP to the wheels before it popped a head gasket. It has the S trim with the water tank fed intercooler. Still unsure what way to go, I have a selection of rears to use to I can always drop the rear gear down to the low 3s with a TH400, or go lower with the overdrive setup. I have a 4:10 rear I could run with a T56.
Biggest thing is I do not want to lose the engine tune, I know I will have to reflash the PCM with a T56 program but need to keep all of the mods made when the engine was tuned.
4L80 will bolt up to the LT1 no problem, only difference will be the 4L80 will use a larger bolt pattern converter for a 168 tooth flexplate. LT1 runs the smaller 153, so would have to swap out the flexplate and the starter to make it work.
I have found lower mileage used 4L80s for sale, in stock form I am sure they are stronger than the 4L60E, but not sure if they are strong enough to use as is. Supposedly this thing put down 540HP to the wheels before it popped a head gasket. It has the S trim with the water tank fed intercooler. Still unsure what way to go, I have a selection of rears to use to I can always drop the rear gear down to the low 3s with a TH400, or go lower with the overdrive setup. I have a 4:10 rear I could run with a T56.
Biggest thing is I do not want to lose the engine tune, I know I will have to reflash the PCM with a T56 program but need to keep all of the mods made when the engine was tuned.
That T56 is fun though.
Last edited by hrcslam; 07-03-2014 at 10:04 AM.
