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TH400 shifting compared to TH350??

Old 11-15-2006, 12:33 PM
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Default TH400 shifting compared to TH350??

How is the shifting of a 350 compared to a 400? My 400 takes about 700rpm to shift. I am talking about having my shift light set at 6400 rpms to keep from hitting a 7200rpm rev limit before the shift. Is a 350 the same way or does it shift quicker?

I went with the 400 for the strength, but I feel like I am losing some ET from the lagging shift, not to mention the inconsistency. I mean the first time I ran the 1/4 I ended up letting out in 3rd at 6400 because my shift light came on.

With a built to the hilt 350, could it hold up to a 3800lb car with 600ft lbs (DynoJet) of torque?
Old 11-15-2006, 01:06 PM
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Originally Posted by Silver Slayer
How is the shifting of a 350 compared to a 400? My 400 takes about 700rpm to shift. I am talking about having my shift light set at 6400 rpms to keep from hitting a 7200rpm rev limit before the shift. Is a 350 the same way or does it shift quicker?

I went with the 400 for the strength, but I feel like I am losing some ET from the lagging shift, not to mention the inconsistency. I mean the first time I ran the 1/4 I ended up letting out in 3rd at 6400 because my shift light came on.

With a built to the hilt 350, could it hold up to a 3800lb car with 600ft lbs (DynoJet) of torque?
ever consider a 4L80E? that'll solve your problems completely.
Old 11-15-2006, 01:44 PM
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Is this a manual valve body TH400 or is it vacuum controlled?
Old 11-15-2006, 06:53 PM
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Originally Posted by ChocoTaco369
ever consider a 4L80E? that'll solve your problems completely.
Not really.
Old 11-15-2006, 06:53 PM
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Originally Posted by vanillagorilla
Is this a manual valve body TH400 or is it vacuum controlled?
Manual valve body
Old 11-15-2006, 06:58 PM
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somethings not wright my th400 shifts instantly
Old 11-15-2006, 10:59 PM
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My th400 shifts instantly, I click the gear and it's there, zero detectable delay.
Old 11-15-2006, 11:53 PM
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Something wrong. The shift time for a TH400 compared to a TH350 should be identical, and by identical I mean both should have shift times in the 20-30 milisecond range. My manual valve TH400 shifts absolutely instantaneously.
Old 11-16-2006, 12:25 AM
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Originally Posted by Zombie
My th400 shifts instantly, I click the gear and it's there, zero detectable delay.
Ditto.
Something is wrong.
Old 11-16-2006, 06:12 AM
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I guess I should add that I am used to a M6, when you pull the shifter back it is there. It just seems like it takes too long from the time I pull the shifter back until the time it actually shifts into gear.

It only feels like this when I am at WOT. When I am just cruising around, it does seem pretty quick.
Old 11-16-2006, 09:34 AM
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when the shifter hits the stop it should be in the next gear. if it lags after the shifter stops, your clutch pack clearances are probably a little loose.
Old 11-24-2006, 02:08 PM
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I had the same proble. You might need to have someone look at your shift kit. I had to enlarge the holes in the separator plate, now it shifts when it supose to.
Old 11-26-2006, 05:55 PM
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somethings not wright my th400 shifts instantly
Something isn't right. Mine also shifts REAL quick, no lag at all.
Old 11-27-2006, 08:13 PM
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my shift points are so quick that i had to adjust my shift light b/c i was short shifting! lol

i love my th400
Old 11-27-2006, 10:30 PM
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Something is wrong, the the built th350 and 400 cars i've been in shifted instantly.
Old 11-28-2006, 11:33 AM
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Originally Posted by GOaT Cheese
Something wrong. The shift time for a TH400 compared to a TH350 should be identical, and by identical I mean both should have shift times in the 20-30 milisecond range. My manual valve TH400 shifts absolutely instantaneously.
Ditto! Mine is in the next gear super quick with my TH400. It's kinda wierd after using the 4L60E for so long with it's 1-2 second delay...
Old 11-28-2006, 02:44 PM
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Originally Posted by Silver Slayer
I guess I should add that I am used to a M6, when you pull the shifter back it is there. It just seems like it takes too long from the time I pull the shifter back until the time it actually shifts into gear.

It only feels like this when I am at WOT. When I am just cruising around, it does seem pretty quick.
A nice th400 should shift faster than evan the fastest M6 shift
Old 11-28-2006, 11:47 PM
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did it just start doing this, or does it do it all the time?
hot?
cold?
sounds like a worn set of clutches.
it should be in gear before you can even fully ratchet the shifter.
like everyone else says
INSTANTLY.
good luck.
Old 11-29-2006, 05:17 AM
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This is something that has happened since it was installed. It was built using racing clutches and all the good stuff inside by a reputable builder (local)

I am going to try this weekend to check the line pressure and try launching off the foot brake and see if it makes any difference.

It only seems to be lagging at WOT, when I am just cruising around, 2nd shifts instantly, 3rd does not seem as quick, but then again it is a 4400 stall.
Old 11-29-2006, 05:25 AM
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I see alot of people get burned by local builders. Thats why I ordered mine from tci. It is also forsale.

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