Yet another 700R4 question
Thread Starter
Racer
Joined: Jan 2002
Posts: 473
Likes: 8
From: Shreveport LA
Yet another 700R4 question
I have an Art Carr built 700R4 transmission that was built about 16K ago. Here's the problem. The transmission shifts great under normal driving conditions. There are no wierd noises or other signs of wear, etc. The problem only shows itself under heavy throttle. The tranny shifts pretty stoutly from 1st to 2nd, but 2nd - 3rd, and 3rd - 4th are delayed with the engine revving out of control for a second or two before the transmission finally settles into gear. This thing just doesn't "hit" when you shift it.
Is this something that the installation of a shift kit might remedy, or am I looking at worn out internals? I 'guesstimate' that I'm making right at 400 horsepower with my current setup, which might or might not be too much for the 700R4 to handle.
My second question would be, when the time comes to replace this tranny, is there a more 'bulletproof' overdrive auto transmission that might suit higher output situations better than the 700R4? I'm open to all suggestions. Thanks :)
Rome
Is this something that the installation of a shift kit might remedy, or am I looking at worn out internals? I 'guesstimate' that I'm making right at 400 horsepower with my current setup, which might or might not be too much for the 700R4 to handle.
My second question would be, when the time comes to replace this tranny, is there a more 'bulletproof' overdrive auto transmission that might suit higher output situations better than the 700R4? I'm open to all suggestions. Thanks :)
Rome
Burning Brakes
Joined: Nov 2000
Posts: 855
Likes: 0
Re: Yet another 700R4 question (ROME)
Sounds like your TV cable might need adjusting, a broke motor mount can also give symtoms of misadjusted TV. How does it shift if you manually shift from 2nd to D and D to OD?
Thread Starter
Racer
Joined: Jan 2002
Posts: 473
Likes: 8
From: Shreveport LA
Re: Yet another 700R4 question (Rick86)
Under heavy throttle I'm always shifting manually. I suppose I could leave the car in OD and go from a dead stop and see if it shifts any differently.
I've never adjusted the TV cable myself. Is it a PITA, or can it be done relatively simply?
Rome
I've never adjusted the TV cable myself. Is it a PITA, or can it be done relatively simply?
Rome
Burning Brakes
Joined: Nov 2000
Posts: 855
Likes: 0
Re: Yet another 700R4 question (ROME)
I've never adjusted the TV cable myself. Is it a PITA, or can it be done relatively simply?
Race Director
Joined: Oct 2000
Posts: 16,477
Likes: 1
From: Enter Post Count Here
Re: Yet another 700R4 question (ROME)
Sounds like a leaky valve maybe, not making quite enough pressure to slam the gear into fourth. A shift kit would help, but I don't think it will fix it.
As for a stronger Transmission, a TurboHydramatic 200 R4 is what the GN guys use, when built right they'll stand up to 1200 hp. Don't know how hard it would be to put one in a Corbette though. The gear ratios are awesome too, something like 2.3, 1.55, 1.00, 0.75 I think...wait, that might be the 4L80...anywho, they're closer than the 700's.
As for a stronger Transmission, a TurboHydramatic 200 R4 is what the GN guys use, when built right they'll stand up to 1200 hp. Don't know how hard it would be to put one in a Corbette though. The gear ratios are awesome too, something like 2.3, 1.55, 1.00, 0.75 I think...wait, that might be the 4L80...anywho, they're closer than the 700's.
