how long has your RMVB th400 w/brake lasted on the street? (miles)
04-15-2010, 10:45 PM
#101
Little old, but alot of good info in one spot. I have been running a stock th400 for awhile and liked it. Thing is with the stock form it had a long delay between shifts, but still did ok. ( im sure it effected my ET a decent amount)
Well now i have th400 rmvb / trans brake ( not wired in yet ) and 2400 B&M Holeshot converter ( just for a starter)
So far the trans works awesome! Love how quick and firm the shifts are. BUT when i am going in reverse, i have to rev the motor to like 3k+ to get the car to go back?? Does that have something to do with the trans brake not being wired in?
Would i have to hold the trans brake down and then go into reverse or is that stall just THAT loose in reverse???
Well now i have th400 rmvb / trans brake ( not wired in yet ) and 2400 B&M Holeshot converter ( just for a starter)
So far the trans works awesome! Love how quick and firm the shifts are. BUT when i am going in reverse, i have to rev the motor to like 3k+ to get the car to go back?? Does that have something to do with the trans brake not being wired in?
Would i have to hold the trans brake down and then go into reverse or is that stall just THAT loose in reverse???
04-16-2010, 10:48 AM
#102
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What brand of valve body do you have? A lot of the trans brake valve bodies do have to have the brake solenoid engaged to have reverse, mine happens not to be that way but some are. A brake works by applying 1st and reverse at the same time, whether the brake solenoid has to be engaged to achieve reverse all has to do with how the fluid circuit is designed.
Idk if it could have something to do with the converter, but if i recall it took a little rev to get it to go in reverse on my last th400. But i dont think it was that much??
04-16-2010, 12:04 PM
#103
That's a good question i dont have the answer too. I bought it from a guy somewhat local that got it from a guy on here. I know it has a Hipster Brake if that helps any??
Idk if it could have something to do with the converter, but if i recall it took a little rev to get it to go in reverse on my last th400. But i dont think it was that much??
Idk if it could have something to do with the converter, but if i recall it took a little rev to get it to go in reverse on my last th400. But i dont think it was that much??
04-17-2010, 01:08 PM
#107
Because the principal of a trans brake is to apply reverse & 1st gear at the same time not letting the car move but putting the motor under load. When you hit the brake button it applies fluid to the reverse circut, so hitting the button while not in first will apply just reverse so you can back up.
04-17-2010, 07:10 PM
#108
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Ahh. Ok, it's starting to make alot more sense to me now. Thanks alot for the good info. I will try and get my trans brake wired in and see how it does. Just gotta find a button. lol!
10-10-2011, 01:00 PM
#110
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DD's need overdrive unless you don't care about mileage. The problem is two fold. Gearing and the fact that the TH400 doesn't support a lock up type converter.
I run a 3.42 gear with a TH400 but with a non lockup 4000 stall I'm definitely not driving this thing long distances on a daily basis.
I run a 3.42 gear with a TH400 but with a non lockup 4000 stall I'm definitely not driving this thing long distances on a daily basis.
10-10-2011, 05:56 PM
#111
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So does this info only apply to TH400's or all manual valve body cars? I recently bought a T/A with a FMVB 4L80E and I didn't know any of this before reading this thread.
10-28-2011, 11:20 PM
#114
Very good read in here. Wow. Some long winded ones but they still got the point across.
My thinking is like this. When in a higher rpm the trans and rear act as a load to the trans's internals. Removing that load via lifting is like letting go of a stretched rubber band. Lower rpms don't "fling" as far as a higher rpm would. Think barely stretching vs stretching the crap out of the rubber band. Would this be correct? I may be in left field with the ball in right field on this one but it's the best way I can imagine it.
My thinking is like this. When in a higher rpm the trans and rear act as a load to the trans's internals. Removing that load via lifting is like letting go of a stretched rubber band. Lower rpms don't "fling" as far as a higher rpm would. Think barely stretching vs stretching the crap out of the rubber band. Would this be correct? I may be in left field with the ball in right field on this one but it's the best way I can imagine it.
10-30-2011, 03:09 PM
#115
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I have about 9,000 street miles on my TH-400. I have been running it in conjunction with 3.73's but have been thinking lately of switching to a 3.08 rear gear.
01-03-2012, 06:43 PM
#116
I had the throttle stick with my t-56 after my run at the track. I turned the key off because it was on the rev limiter and nothing I could do. So your saying now that I have a TH400 in my car if this happens I cant turn the key off or put it in neutral? So you'd be pretty fucked in this situation then.
01-03-2012, 09:00 PM
#117
ive got a built th350 with brake. I didnt get very many miles on it before I tossed a rod, but the few I did was a blast! i dont think its very easy to break these things, i was beating on it like it owed me something and it never hickuped once. Run a big plate cooler, and a trans temp gauge, keep the temps down (mine never gets over 180) and you should be fine. Im also running it with an FTI 4400 converter. Oh, and hears where it seperates the men from the boys.........4.10 rear gear 
01-03-2012, 09:10 PM
#118
LMAO! I been there with the 4.10's, When Lenny built my converter I still had the 4.10's in & he specifically told me not to even try to run the car with that ratio, I did for a little bit anyway. I can only imagine how hot a 4.10 gear turbo car gets with a 5k stall.
01-04-2012, 10:08 AM
#120
I had the throttle stick with my t-56 after my run at the track. I turned the key off because it was on the rev limiter and nothing I could do. So your saying now that I have a TH400 in my car if this happens I cant turn the key off or put it in neutral? So you'd be pretty fucked in this situation then.