Opinions on daily driving on a TH400? - LS1TECH

Log In 


Automatic Transmission 4L60E | 4L80E | TH350 | TH400 | TH2004R | Powerglide | Converters | Shift Kits
Sponsored by:
Sponsored by:

Opinions on daily driving on a TH400?

Reply
 
Thread Tools Search this Thread
Old 06-30-2004, 12:14 PM   #1
TECH Fanatic
Thread Starter
 
Join Date: Nov 2001
Location: CA
Posts: 1,064
Default Opinions on daily driving on a TH400?

Thinking about going this route . . .Anybody daily drive on a TH400? Give me your opinions
MeanWS6 is offline   Reply With Quote
Old 06-30-2004, 01:49 PM   #2
TECH Fanatic
iTrader: (25)
 
Join Date: Nov 2001
Location: SC
Posts: 1,784
Default

I drive my Th350/3.73/3500 all the time. I do miss the OD but really like the shifts at the track. I get 13MPG with my LT1/HOT cam car. but I am going back to an A4 shortly, almost $2/gal, i need to get more out of a tank....

It really depends on what you plan on doing with the car. most race tracks for me are over an hour away, 60MPH and 3kRPMs gets old on some trips.
Shon Herron is offline   Reply With Quote
Old 06-30-2004, 02:49 PM   #3
TECH Fanatic
iTrader: (10)
 
Join Date: Nov 2001
Location: Belleville, IL
Posts: 1,237
Default

People used to drive TH400's and TH350's all the time, don't see the big deal about it now.

The only things that really need to be addressed is how to rig up a speedo? Talked to Madman and he says he doesn't do that?
MUSTANGEATER is offline   Reply With Quote
Old 06-30-2004, 02:56 PM   #4
TECH Senior Member
 
Colonel's Avatar
 
Join Date: Nov 2001
Location: Troy, AL
Posts: 9,246
Default

I have one in my '87 Chevy Silverado. Not so bad with 3.55 gears and a tight converter.
Colonel is offline   Reply With Quote
Old 06-30-2004, 02:59 PM   #5
TECH Senior Member
iTrader: (2)
 
gator's 99TA's Avatar
 
Join Date: Nov 2001
Location: Tampa Bay
Posts: 9,971
Default

yes people used to drive with th350/400 all the time, but highway speeds were never 70 mph. and heck, most places, driving 70 will get you run overed! when highway speeds were 55 mph and most people had at most 3.27 gearing, it wasnt a big deal.
gator's 99TA is offline   Reply With Quote
Old 06-30-2004, 03:26 PM   #6
TECH Fanatic
Thread Starter
 
Join Date: Nov 2001
Location: CA
Posts: 1,064
Default

Well, I would like to be able to drive at highway speeds 70-80MPH. I have 3.73's. Would I be revving too high? What stall should I go with?
MeanWS6 is offline   Reply With Quote
Old 06-30-2004, 03:43 PM   #7
10 Second Club
 
Jorday's Avatar
 
Join Date: Nov 2001
Location: Fenton, MI
Posts: 1,724
Default

I like to drive around 75-80 mph on the interstate and no OD would drive me crazy even with 3.23 gears.
Jorday is offline   Reply With Quote
Old 06-30-2004, 06:43 PM   #8
11 Second Club
iTrader: (3)
 
MARKSZ71's Avatar
 
Join Date: Nov 2001
Location: bama bitch
Posts: 1,582
Default

hey stephen is that your first truck
MARKSZ71 is offline   Reply With Quote
Old 06-30-2004, 06:48 PM   #9
Cam Only Director
iTrader: (10)
 
SMOKIN01TA's Avatar
 
Join Date: Oct 2003
Location: McComb, MS
Posts: 4,112
Default

Quote:
Originally Posted by MeanWS6
Well, I would like to be able to drive at highway speeds 70-80MPH. I have 3.73's. Would I be revving too high? What stall should I go with?
i have a th350 in my s-10 with 3.73's and it turns about 3200rpms around 70
SMOKIN01TA is offline   Reply With Quote
Old 07-01-2004, 07:48 AM   #10
TECH Fanatic
iTrader: (25)
 
Join Date: Nov 2001
Location: SC
Posts: 1,784
Default

Quote:
Originally Posted by MUSTANGEATER
The only things that really need to be addressed is how to rig up a speedo? Talked to Madman and he says he doesn't do that?
TH400 can use GM parts for the speedo. Check out LJ's site for the part numbers.
TH350 I use the Dakota Digital SGI5a and SEN01.
Shon Herron is offline   Reply With Quote
Old 07-01-2004, 10:08 AM   #11
TECH Regular
 
Join Date: Feb 2004
Posts: 414
Default gearing

Quote:
Originally Posted by MeanWS6
Thinking about going this route . . .Anybody daily drive on a TH400? Give me your opinions
it is possible to put a planet gear with a bigger number, like 2.75-3.0 in the th400 and under gear the rear end and get to the same place poor mans od

Last edited by john kilgore; 07-01-2004 at 11:10 AM. Reason: wrong wording
john kilgore is offline   Reply With Quote
Old 07-01-2004, 10:12 AM   #12
TECH Fanatic
iTrader: (25)
 
Join Date: Nov 2001
Location: SC
Posts: 1,784
Default

Quote:
Originally Posted by john kilgore
it is possible to over gear the th400 and under gear the rear end and get to the same place poor mans od
How does this play into the stall speed selection? B/c I have thought about putting the 3.23 rear end back under the car and not worrying with the A4 rebuild but didnt know how this would effect stop and go with a 3500 stall.

I guess I could just put it in there and see and report....
Shon Herron is offline   Reply With Quote
Old 07-01-2004, 02:41 PM   #13
Staging Lane
 
Join Date: Dec 2001
Location: Houston, Texas USA
Posts: 93
Default

I don't think you should be picking your converter's stall RPM selection based on what rear-end gear ratios you want to use.

The converter's stall RPM decision is usually based on where your motor's power/torque band is.

The decision of what rear-end gears to run should be based on your target total 1st gear ratio (tranny 1st gear * rear end), which is also going to depend on how torquey your motor is, and supposedly you've picked your converter stall speed to put the motor into it's torque band quicker.

Whether you can live with no overdrive after you met your above criteria is a completely separate decision you have to make, but unless you go with a really high stall RPM (4K or more), the converter stall speed won't appreciably change how many RPM's it will take to cruise at 70 mph. FWIW, I use a 3200 RPM stalled Vigilante, and when I'm cruising at 70, my motor is turning just over 3 grand, but the motor sounds like it's ready for more. It doesn't sound like I'm winding it out at all like it did when it was stock. (It's currently an iron block 408).

I know the TH350 has an alternative, lower 1st gear ratio, so the TH400 likely does too. But, at least with the TH350, it is really not much lower and doesn't get you much. I considered getting it when I got my TH350 rebuilt, but was talked out of it by a reputable tranny builder. It simply wasn't worth what it cost. You might have more than one other choice of 1st gear ratios for the TH400, but I don't know about that.
Dean98TA is offline   Reply With Quote
Old 07-01-2004, 10:34 PM   #14
TECH Senior Member
 
Colonel's Avatar
 
Join Date: Nov 2001
Location: Troy, AL
Posts: 9,246
Thumbs up

Quote:
Originally Posted by MARKSZ71
hey stephen is that your first truck
Yup, reminds me of high school days.
Colonel is offline   Reply With Quote
Old 07-01-2004, 10:44 PM   #15
TECH Fanatic
iTrader: (10)
 
Join Date: Nov 2001
Location: Belleville, IL
Posts: 1,237
Default

Quote:
Originally Posted by Shon Herron
TH400 can use GM parts for the speedo. Check out LJ's site for the part numbers.
TH350 I use the Dakota Digital SGI5a and SEN01.
Who is LJ???? What is his site?
MUSTANGEATER is offline   Reply With Quote
Old 07-02-2004, 07:31 AM   #16
TECH Fanatic
iTrader: (25)
 
Join Date: Nov 2001
Location: SC
Posts: 1,784
Default

http://para.noid.org/~lj
Shon Herron is offline   Reply With Quote
Old 07-02-2004, 08:37 AM   #17
TECH Regular
 
Join Date: Feb 2004
Posts: 414
Default ratios

Quote:
Originally Posted by Dean98TA
I don't think you should be picking your converter's stall RPM selection based on what rear-end gear ratios you want to use.

The converter's stall RPM decision is usually based on where your motor's power/torque band is.

The decision of what rear-end gears to run should be based on your target total 1st gear ratio (tranny 1st gear * rear end), which is also going to depend on how torquey your motor is, and supposedly you've picked your converter stall speed to put the motor into it's torque band quicker.

Whether you can live with no overdrive after you met your above criteria is a completely separate decision you have to make, but unless you go with a really high stall RPM (4K or more), the converter stall speed won't appreciably change how many RPM's it will take to cruise at 70 mph. FWIW, I use a 3200 RPM stalled Vigilante, and when I'm cruising at 70, my motor is turning just over 3 grand, but the motor sounds like it's ready for more. It doesn't sound like I'm winding it out at all like it did when it was stock. (It's currently an iron block 408).

I know the TH350 has an alternative, lower 1st gear ratio, so the TH400 likely does too. But, at least with the TH350, it is really not much lower and doesn't get you much. I considered getting it when I got my TH350 rebuilt, but was talked out of it by a reputable tranny builder. It simply wasn't worth what it cost. You might have more than one other choice of 1st gear ratios for the TH400, but I don't know about that.
2.10 first to a 3.00 first is available
john kilgore is offline   Reply With Quote
Old 07-02-2004, 08:40 AM   #18
TECH Fanatic
iTrader: (25)
 
Join Date: Nov 2001
Location: SC
Posts: 1,784
Default

Who has the 3.00 1st? I was looking for this locally and no one has that gear set for some reason, that would be nice!!!
Shon Herron is offline   Reply With Quote
Old 07-02-2004, 09:48 AM   #19
TECH Enthusiast
 
Join Date: Aug 2003
Location: Downers Grove,IL
Posts: 596
Default

Quote:
yes people used to drive with th350/400 all the time, but highway speeds were never 70 mph. and heck, most places, driving 70 will get you run overed! when highway speeds were 55 mph and most people had at most 3.27 gearing, it wasnt a big deal.
The 55mph speed limit was not in place until 1974. That was the end of the muscle car era. Before 1974 it was 70mph and that's when all the bad *** cars rolled around. I started driving in 77. And nobody did 55mph anyhow.
All the cars back then had 3spd autos or 4spd manuals with no OD.
Sort of funny to me when I see the young guys thinking a th400 is extreme in a daily driver. I suppose if you do a lot of highway driving then it might be a pain with a high stall and a lot of gear.

Steve
S_J_H is offline   Reply With Quote
Old 07-02-2004, 10:48 AM   #20
TECH Regular
 
Join Date: Feb 2004
Posts: 414
Default webb site

Quote:
Originally Posted by Shon Herron
Who has the 3.00 1st? I was looking for this locally and no one has that gear set for some reason, that would be nice!!!
l'm not suppose to recommend my webb site
john kilgore is offline   Reply With Quote
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
Need opinions please.. criticalx LT1-LT4 Modifications 5 02-16-2016 04:00 PM
TH400 stall for procharged camaro Staleyp Automatic Transmission 11 02-13-2014 01:13 PM
Best street able drag tranny & gears for A4 4th gen Colesitzy Drag Racing Tech 16 09-26-2013 08:57 PM
video of their TH400 while daily? TurboZ28408 Automatic Transmission 21 02-18-2009 06:41 AM
Daily driving a forward manual TH400??? White.Lightning Automatic Transmission 16 05-03-2006 10:49 PM


Tags
1st140, 210, 2nd, alternative, daily, driving, front, gm, highway, planetary, pump, set, sound, th350, th400, transmission, transmitssion, winding

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are On
Refbacks are Off



All times are GMT -5. The time now is 04:40 PM.