poor mans od trans out of a th400
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I have been doing a little more research and folks are saying that 3.08 is a good number but the thing about it .i dont wont to drive on the highway at 70 mph and tach at 3200 rpm.it would be nice if to cruise 80 mph and still and below 2800rpms.
some one on here mention something about a powerglide can that person explain more in detail about the powerglide
some one on here mention something about a powerglide can that person explain more in detail about the powerglide
The TH2004R has a lot of parasitic loss? I think you meant the TH400. GM designed the 200 series to use less power to turn the wheels. Of course durability on the original TH200 was awful. As said don't spend a dollar on your 7.5! Even a 9" better be built with the best parts with that power.
I had to go back and re-read my post to make sure I didn't say it wrong :lol: .olds307 and 403 said:
The TH400 is a power hungry monster but very tough even in stock form. Not sure if the 4L80E is much better but I'd hope so. You're definitely correct about the 200-series being designed with efficiency in mind. I don't know if that's such a concern in the "670-720hp" range though.DRIVEN said:
The powerglide has a very strong following in the drag racing world. There is lots of parts support and they can be built to take just about any amount of power. Due to their taller 1st gear you need to run deeper rearend gearing to compensate. This limits top speed. The advantages are that there are less parts to turn/break and only one shift. It's a great choice for a dedicated track car but wouldn't be my first pick if there's any street use involved. Street cars like overdrive.
Im looking at a future 4L80e swap in my monte and there are alot of things that need changing in order use one in a gbody from what I have read. Custom crossmember, different flywheel, speedo conversion, clearence with the floor and headers, and of course it requires a standalone controller. Definately NOT cheaper!kad5118 said:
Lol. Id like to know how you got your GBody to 2000 lbs.
A 4L80E will do everything a TH400 will do with a GV overdrive, but it will also have lock up, and be less than 1/2 the price.
My $0.02.[/quote]
is this a stock 4l80e that we are talking about or a built up one[/quote]
Im looking at a future 4L80e swap in my monte and there are alot of things that need changing in order use one in a gbody from what I have read. Custom crossmember, different flywheel, speedo conversion, clearence with the floor and headers, and of course it requires a standalone controller. Definately NOT cheaper![/quote]
thats exactly what i thought about going with the 4l80e.it would be cheaper to go with a 4l60e vs a 4l80e if i remember correctly
A 4L80E will do everything a TH400 will do with a GV overdrive, but it will also have lock up, and be less than 1/2 the price.
My $0.02.[/quote]
is this a stock 4l80e that we are talking about or a built up one[/quote]
Im looking at a future 4L80e swap in my monte and there are alot of things that need changing in order use one in a gbody from what I have read. Custom crossmember, different flywheel, speedo conversion, clearence with the floor and headers, and of course it requires a standalone controller. Definately NOT cheaper![/quote]
thats exactly what i thought about going with the 4l80e.it would be cheaper to go with a 4l60e vs a 4l80e if i remember correctly
The 4L60e will be an easier swap but wont hold up to as much torque as the 80e would. I read somewhere that a stock 4L80e would consistently hold up to about 460lbs-ft.
I think you should wait till you build the engine and get it dynoed. You talking about have in the area of 800 hp at the crank out of a 4.8 but the important measurement is how much torque can you're going to get out of that engine
I have a TH400 and a GV overdrive. I spent $500 to have it gone through, install new clucth packs, rebuild front pump and install a Stg3 Trans-Go full manual shift kit. (the trans guy was good to me).
I spent close to $2k for a GV overdrive.
A transmission guy later explained to me that the 4L80E would have been cheaper in the end.
-Shift kit
-Full manual shift kit
-Torque converter
Cost of drive shaft shortening is the same for any trans, and so is the cross member. You dont need to cut the floor to instal them, theres plenty of G bodies running them. Not sure why you'd need headers with them. You can spend on electronics if you want to, but thats a headache in my view.
They are just as tough or tougher than a TH400, so whatever you would do to the TH400, you could do to the 4L80E to make it live.
I spent close to $2k for a GV overdrive.
A transmission guy later explained to me that the 4L80E would have been cheaper in the end.
-Shift kit
-Full manual shift kit
-Torque converter
Cost of drive shaft shortening is the same for any trans, and so is the cross member. You dont need to cut the floor to instal them, theres plenty of G bodies running them. Not sure why you'd need headers with them. You can spend on electronics if you want to, but thats a headache in my view.
They are just as tough or tougher than a TH400, so whatever you would do to the TH400, you could do to the 4L80E to make it live.
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