advantages of going with a turbo 350 over...
advantages of going with a turbo 350 over... 
12-20-2007, 07:20 PM
#2
It will only drop your ET when your 4l60 takes a dump and leaves you at the starting line. 
For 500 RWHP and below, no need to consider a TH400 other than the economics of a built TH400 are bettter than a built 4L60e.
I'm a bit partial to the 400 rather than the 350.
For 500 RWHP and below, no need to consider a TH400 other than the economics of a built TH400 are bettter than a built 4L60e. I'm a bit partial to the 400 rather than the 350.
12-20-2007, 10:34 PM
#6
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Frank, what do you consider "close to the same weight"? The last time I looked, performabuilt had th 350's listed on their website. I would think you should have some pretty accurate shipping weights available to you for comparison. Oh, don't forget, we can't compare it with a 60E that ships without a bell housing.
I'm just curious because I've heard as much as a thirty pound difference. Some of that would be rotating weight also, so that counts extra.
Omega, try a search in the drag racing section, lots of info there. Results are hard to compare because there will also be a converter change involved in a swap. I've never heard of anyone slowing down after swapping to a three speed. I have heard of cars picking up as much a three tenths though.
I'm just curious because I've heard as much as a thirty pound difference. Some of that would be rotating weight also, so that counts extra.
Omega, try a search in the drag racing section, lots of info there. Results are hard to compare because there will also be a converter change involved in a swap. I've never heard of anyone slowing down after swapping to a three speed. I have heard of cars picking up as much a three tenths though.
12-20-2007, 10:56 PM
#7
RAZER BLADE -Actually you would be surpirsed we dont weight the trans in house fedex does and oddly just on the 4l60e alone the weights that show in shipping vary from a little as 75 lbs to as much as 155 (I THINK THEY GUESS ALOT). But the average for the trans with the box its in is around 135 to 145. The bell if included around15 to 20 lbs.
I have never actually weighed either personally as a stand alone, I have picked both up alone and would say they are pretty darn close. Where the 4l60e is alittle longer and has a few more parts it also has and aluminum pump and input drum as opposed to the 350 with a cast iron pump and steel input drums, If we had a scale at the shop I would weight both when I was there tomorow, Just to find out,
Omega- Personally I dont see a real advantage to the swap , In fact we get quite a few people buying transmissions from us to switch back. TH350 or 400 with todays gas prices = less money for other fun things unless your car is a full blown weeknd drag car then It dosent really matter.
I have never actually weighed either personally as a stand alone, I have picked both up alone and would say they are pretty darn close. Where the 4l60e is alittle longer and has a few more parts it also has and aluminum pump and input drum as opposed to the 350 with a cast iron pump and steel input drums, If we had a scale at the shop I would weight both when I was there tomorow, Just to find out,
Omega- Personally I dont see a real advantage to the swap , In fact we get quite a few people buying transmissions from us to switch back. TH350 or 400 with todays gas prices = less money for other fun things unless your car is a full blown weeknd drag car then It dosent really matter.
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12-21-2007, 12:18 AM
#8
FWIW..... a 4L60E with our 9 1/2" SS Converter weighs right at 165# dry. As measured on our scales at the shop.
Omega hop in the car and come out to the shop sometime... we'll put a plan in place that works with your budget 3 speed or 4 speed... your call!
g
Omega hop in the car and come out to the shop sometime... we'll put a plan in place that works with your budget 3 speed or 4 speed... your call!
g
12-21-2007, 10:17 AM
#10
My complete TH350 minus converter weighed 120lbs according to freight.
The TH350 you can build for alot cheaper than the 60E's and also they will last longer. ALso you can add the trans brake to the 350. I've heard of people dropping ets a lil from the swap.
The TH350 you can build for alot cheaper than the 60E's and also they will last longer. ALso you can add the trans brake to the 350. I've heard of people dropping ets a lil from the swap
.
12-22-2007, 09:00 PM
#12
If you master the T-Brake, there can be an ET drop, but I've never seen anyone drop .3 just from the switch when going from a full functioning 4L60 to a TH 350 or TH 400. The only ones I've seen get in that range have had a significant converter swap at the same time.
12-26-2007, 10:45 PM
#14
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th350 car went 5.87@122 and 9.21@146 both transmission where in the bottom 1.3 60ft the last time i took the car out before the new build it blew the tires off with a 1.76 60ft and ran 9.40@149 the 60ft before that run was a 1.34 but the run was aborted due to a n20 problem.
Now i relize the converter may have had alot to due with it but with the 4l60 i had just about every converter out there at one time or another. So on the 9.40@149 pass give me the 60ft from the pass before and that would have put the car at 8.95 so i would say my th350 was about half sec faster that my 4l60e
IMO a 4l60e first gear is way to low and secound is light years from first making it a slower transmission for a car making 500+rwhp
12-27-2007, 12:16 AM
#15
g
12-27-2007, 07:03 AM
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ChevPower, I'm pretty sure it was your car that I was talking about. I just couldn't remember the exact numbers. We spoke on the phone about six or eight months ago.
