TH400??? feeling kinda stupid...
Thread Starter
Melting Slicks
Joined: Dec 2001
Posts: 2,025
Likes: 1
From: Billings MT
TH400??? feeling kinda stupid...
Ok, i'm feeling rather stupid for asking this, BUT....
does my '74L82 auto have the TH400, or 350.
I'm almost positive it is the 400, i just got my
B&M shift kit for it today, and i'm hoping i got the right one :)
OH!, and i ordered my 17x8 Torq Thrust II's today with some
245/45/17 Falken Tire GRB-Fk451 tires :D:D:D:D:D:D:D:D
Gonna be swwwweeett...
Thanks
does my '74L82 auto have the TH400, or 350.
I'm almost positive it is the 400, i just got my
B&M shift kit for it today, and i'm hoping i got the right one :)
OH!, and i ordered my 17x8 Torq Thrust II's today with some
245/45/17 Falken Tire GRB-Fk451 tires :D:D:D:D:D:D:D:D
Gonna be swwwweeett...
Thanks
Safety Car
Joined: Aug 2000
Posts: 3,909
Likes: 26
From: Clymer PA
Re: TH400??? feeling kinda stupid... (VETDRMS)
I checked my Corvette "Black Book" and the RPO# for your transmission is M40 which is a Turbo Hydra-Matic Transmission (does not specify 350 or 400). It goes on to say that the M40 was used with the LS4 & L82. If the same transmission that you have was used on a big block you can bet your bottom dollar that it is a TH400. That and the fact that the transmission that came with the LS4 that I purchased was a TH400. So to answer your question YES you have a TH400....one of the strongest and most reliable automatic transmissions ever made. :cheers:
Thread Starter
Melting Slicks
Joined: Dec 2001
Posts: 2,025
Likes: 1
From: Billings MT
Re: TH400??? feeling kinda stupid... (bence13_33)
Bence, thanks for the info, you wouldn't by chance know anyting about the B&M shift improver kit would you?? Not sure which setting i want to use...
Le Mans Master
Joined: Sep 2000
Posts: 5,635
Likes: 4
From: Orlando Floriduh
Re: TH400??? feeling kinda stupid... (VETDRMS)
All Corvetttes up to sometime in the late seventies had TH400's. I think the change to TH350 came in 77 but not positive. So you should have a TH400 if you have the original trans.. It is easy to Identify.. The oil pan is a strange looking curvey shape compared to a 350 that is square with one angled corner. TH400's have no kickdown cable as that function is done electrically. TH400's are much tougher. :yesnod:
[Modified by silvervetteman, 5:15 AM 2/3/2002]
[Modified by silvervetteman, 5:15 AM 2/3/2002]
Melting Slicks
Joined: Aug 2000
Posts: 2,310
Likes: 1
Re: TH400??? feeling kinda stupid... (VETDRMS)
Check out this pic from the http://www.corvettefaq.com/ page...
You may want to do a search on "shift kit". There have been recent threads on which stage of "improvement" to use on TH350 installs. I believe the general concensus was the street/strip stage. I used the HD/Towing on my TH350 and, while it was a big improvement, if I get in there again, I'll go street/strip.
Also, I'm not sure if you TH400 can uses an adjustable modulator like my 350, but if it does, I would recommend getting one. On the 350 it's a really easy install (especially when you're under there doing the shift kit). It lets you adjust the shift points up and down the RPM range. For less than $15, it's another very nice mod to the trans.
Good Luck!
[Modified by jerryp58, 7:45 AM 2/3/2002]
You may want to do a search on "shift kit". There have been recent threads on which stage of "improvement" to use on TH350 installs. I believe the general concensus was the street/strip stage. I used the HD/Towing on my TH350 and, while it was a big improvement, if I get in there again, I'll go street/strip.
Also, I'm not sure if you TH400 can uses an adjustable modulator like my 350, but if it does, I would recommend getting one. On the 350 it's a really easy install (especially when you're under there doing the shift kit). It lets you adjust the shift points up and down the RPM range. For less than $15, it's another very nice mod to the trans.
Good Luck!
[Modified by jerryp58, 7:45 AM 2/3/2002]
