TH400 shifting for stock 350
Thread Starter
Drifting
Joined: Nov 2002
Posts: 1,951
Likes: 1
From: Shore NJ
TH400 shifting for stock 350
Hey guys I was wondering how many of you with TH400 auto trans shift the gears when running the 1/4 mile. I'm running a stock 350 with a few mods: high rise manifold, a Holley 780 with vacuum secondaries, 3.55 rear, and a custom 2 1/2"exhaust with flowmaster 50's. Just trying to get an idea of what rpms to shift at without damaging the trans.....installing an Auto meter shift light also........Thanks for your imput....... :flag
Burning Brakes
Joined: Oct 2001
Posts: 1,185
Likes: 0
From: New Wilmington PA
Re: TH400 shifting for stock 350 (73jst4fun)
Mine kind of hesitates when shifted manually, like half a second or so. I try to time it so when the transmission actually shifts I'm pretty darn close to redline. Normally I shift at 5000 when really getting on it but if I were pushing for a time I'd probably aim for closer to 5200 RPMs. I don't plan on turning my motor past 5500.
I don't know if my shifter is broken but I can shift from 3rd to neutral without pressing a button or anything. More than once I've shot clear into neutral from second.
I don't know if my shifter is broken but I can shift from 3rd to neutral without pressing a button or anything. More than once I've shot clear into neutral from second.
Melting Slicks
Joined: Sep 2001
Posts: 2,826
Likes: 0
From: Why Drive When you can ride
Re: TH400 shifting for stock 350 (73jst4fun)
Is the TH400 stock in mid year C3's? I've always been under the impression that I have a TH350, or am I jsut confusing cubic inchs with the transmissin model number?
Thread Starter
Drifting
Joined: Nov 2002
Posts: 1,951
Likes: 1
From: Shore NJ
Re: TH400 shifting for stock 350 (Dwayne 76)
In 1973 all that was offered was a TH400 auto trans, I believe that in 1976 there was two trans offered the TH350 was with the base L-48 350 engine, also the TH400 was with the L-82 350 engine...........
Race Director
Joined: Oct 2000
Posts: 15,044
Likes: 79
From: central FL, near the beach.
Re: TH400 shifting for stock 350 (73jst4fun)
the AMAZING thing with an automatic is PERFECT shifts EVERY time.
of course it has to be recalibrated first http://community.webtv.net/MATTGRU/M...tic/index.html
of course it has to be recalibrated first http://community.webtv.net/MATTGRU/M...tic/index.html
