Transmission Advice
Thread Starter
Instructor
Joined: Apr 2012
Posts: 227
Likes: 0
From: Clarksville Tennessee
Transmission Advice
TH400 Tranny went out. It started whining one week and went dead. The next week I changed the filter/fluid, modulator and it ran fine for a few days. Then, I drove it and it started the whine again and wouldnt move at all. I pulled over for about 15 minutes, made a few calls. I started it up and it drove fine again. I still got it towed home to be safe. So, I got another th400 tranny that needs rebuild and im doing it myself (meaning I have 2 TH400s). I have the B&M kit and I got a 34 element hardened sprag. This will be my first rebuild.
The current tranny is 3 speed auto, manual valve, 2400 stall.
I guess I have everything except the converter.
The other tranny has 3 spd + OD.
What converter do you recommend?
I have a 3:73 rear end, 274 cam, 350 SBC, 600 CFM. I do not race.
You seniors have a wealth of knowledge and experience.
I NEED ADVICE.
The current tranny is 3 speed auto, manual valve, 2400 stall.
I guess I have everything except the converter.
The other tranny has 3 spd + OD.
What converter do you recommend?
I have a 3:73 rear end, 274 cam, 350 SBC, 600 CFM. I do not race.
You seniors have a wealth of knowledge and experience.
I NEED ADVICE.
Le Mans Master
Joined: Oct 2006
Posts: 7,123
Likes: 433
From: Gladstone MO
C3 of Year Finalist (appearance mods) 2019
Get the ASIG(?) book on your 400. Not a bad one to learn on either. Other than it's heavy..
With your 34 element sprag, you'll probably need a clutch drum that's compatible with it.
I've priced the B&M kits- little high.
Get a Trans-Go shift kit.
With your 34 element sprag, you'll probably need a clutch drum that's compatible with it.
I've priced the B&M kits- little high.
Get a Trans-Go shift kit.
Thread Starter
Instructor
Joined: Apr 2012
Posts: 227
Likes: 0
From: Clarksville Tennessee
I already bought the BM kit for $180. But I will use Trans-Go when I rebuild the other one.
I do have a transcooler im eyeballing but wasnt sure if it was necessart, now that you mentioned, im sure i need it.
What size torque converter do you recommend, and how do you guys feel about the inline transmission/oil magnet filters?
I do have a transcooler im eyeballing but wasnt sure if it was necessart, now that you mentioned, im sure i need it.
What size torque converter do you recommend, and how do you guys feel about the inline transmission/oil magnet filters?
Thread Starter
Instructor
Joined: Apr 2012
Posts: 227
Likes: 0
From: Clarksville Tennessee
yes sir, Since I do have two th400, I planned on a learning experience. Is the 2004r a version of a 400? I see that they look the same, what makes it better? Also, I was just looking for a transcooler that bypassed the radiator, any suggestions?
I did have a guy offer me a th350 (complete & ready) for $900 with the removal and install. I considered it, but........
I did have a guy offer me a th350 (complete & ready) for $900 with the removal and install. I considered it, but........
Thread Starter
Instructor
Joined: Apr 2012
Posts: 227
Likes: 0
From: Clarksville Tennessee
Im looking at these transmissions, and the (minor) changes that gave new names. The 2004r came in 1980. The (new) tranny i have to rebuild came from a 1981 chevy truck 2WD, 3/4 ton. I called GM and ran the VIN and it will work in my '73. So im guessing I have a 2004r. But what do I know.
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Thread Starter
Instructor
Joined: Apr 2012
Posts: 227
Likes: 0
From: Clarksville Tennessee
ok, so the one I have MAY?? be a 2004r. It is 3 speed plus overdrive. what about these trans coolers? I have seen you, (the Marine) comment on another post concerning bypassing the radiator.
Le Mans Master
Joined: Aug 2010
Posts: 9,272
Likes: 17
you're refering to a different 'marine', theres a bunch of us on here. You need to identify which trans you actually have prior to buying parts, the 400 doesnt have an electricl connection would be the easiest.
Le Mans Master
Joined: Aug 2010
Posts: 9,272
Likes: 17
http://www.google.com/imgres?hl=en&s...9,r:1,s:0,i:79
look at this link and match your pan to one of them is the other easy way.
look at this link and match your pan to one of them is the other easy way.
Thread Starter
Instructor
Joined: Apr 2012
Posts: 227
Likes: 0
From: Clarksville Tennessee
Yeah, there both 400s. I was confused bacause I was thinking that even if the pan was the same they were different internally.
Now, what about this Clutch drum, Im on JEGS and Summit looking and I see diff parts and I dont know what decision to make.
http://www.summitracing.com/search/?...h%20drum&dds=1
http://www.jegs.com/webapp/wcs/store...00+clutch+drum
Now, what about this Clutch drum, Im on JEGS and Summit looking and I see diff parts and I dont know what decision to make.
http://www.summitracing.com/search/?...h%20drum&dds=1
http://www.jegs.com/webapp/wcs/store...00+clutch+drum