GrannySShifting

iTrader: (10)

When its locked, but unlocked only make 345-350. Ever seen a yank slip that much?

jfm

iTrader: (4)

Something not right my 4400 Yank only shows about 10 rwhp locked vs unlocked.

JNorris

iTrader: (4)

At what RPM is the locked vs unlocked numbers at?

SnakeKiller

iTrader: (7)

My SS3800 was loosing 40 rwhp with my old setup. I'm waiting to see how it does with my new setup. I'm also going to take it to the track to get some numbers. If it doesn't perform it's going back to get inspected.

GrannySShifting

iTrader: (10)

Weve had about 10 Yanks coem thru our shop that just fell apart, im wondering if this one is on its way out. 390 was made at 6300-6350 rpm, the 350 unlocked was held for a few hunderd rpm

mikemodano9c

damn thats a lot of loss...

lots of people seem to be popping up quoting that large of a loss unlocked/locked...

if i had a converter that i knew was causing that much loss i would take it out...

2xLS1

iTrader: (25)

I have Yank ST3500s in both my cars and they both dyno like crap for the mods they have. I have never dynoed them locked so I don't know what the difference would be. They perform very well at the track though.

jfm

iTrader: (4)

What verter you have in the car GrannySShifting ?

I have never had a problem with the 3 Yank converters [SY3500,4000 and PT4400]that I have used.

Could you give us some info on the type of converters that"fell apart",please? Were they SS,SY,PTs ? TIA.

JNorris

iTrader: (4)

My Yank PT4000 tore apart as well. The top bearing in the converter failed and the lockup clutch separated from it’s bonding. The most disturbing problem with the Yank converter was that I ordered a PT4000 and it was very loose. The converter efficiency was below 80% in 3rd gear at 5500 rpm at WOT. Efficiency did not get much better than that at RPM above 6000. As it turns out the PT4000 was really a 4800-5200 stall converter. This was determined when I sent it in for repair.

What Yank converter are you running?


John

GrannySShifting

iTrader: (10)

Its the same thing. Must be another one bit the dust. Weve had a variety yank converters come apart, but seems liek some live well in some peoples cars.
a 3500 has once I think, and no fewer than 4 4000 stalls have come apart. I think they were all the PT4000.

Ive seen guys rock on the 4400 and stuff, but it seems liek some have problems with them soem dont. Seems consistant with te 400 stall though. JNorris and this guy have the exact converter, that flashes to the exact spot, and loses tons of effeciecy

Mike Hoffpauir

My Yank 4400 showed about a 35 rwhp difference locked vs unlocked.

JS

iTrader: (4)

Thanks for posting Mike.
I'm sick of these Yank guys always saying how efficent there are compared to PI,Midwest,TCI.

35RW loss isnt exactly great...
No doubt Yanks TP series is one bad **** but the other guys are right there too.

I might even try a TCI 4400 after seeing how well they work for TX SPEED.

jfm

iTrader: (4)

Mine made a 10 HP diff locked to unlocked back when I was stock internal.Then made a 10 to 12 HP diff with my first H/C combo.Hey JS,hope you got a barf bag.

When I spoke to Paul at Thunder Race he told me that was what to expect with a Yank.

JS

iTrader: (4)

Well this is really strange,I've seen as many good numbers locked vs unlocked on Yanks as bad numbers?

Guess some of us werent as lucky?
So JFM u made 430 unlocked with full exhaust and threw a 10 bolt?

Well that should drop at least 10RW once u add the 12-bolt but according to your unlocked numbers you'll get it back since the Yank is so good,that should put u at 430RW locked threw a 12 bolt.

U drop the PS belt and it'll pick up another 3 or 4 RW...
JFM I'd say u have a good shot at 440RW threw exhaust...

Pretty impressive,good luck....

slow01z28

iTrader: (9)

Jeff, should I pull the pt4000 out of the car?

Let me know what you think. I want to get the car dialed in before the shootout.

Thanks for all the reply's

Rob

Inspector12

iTrader: (29)

Lost 17 HP locked versus unlocked on Carbon's H/C car he has a yank 3600. Just thought I'd let you know that also for comparison we lost about the same I think it was 20 HP difference when we had the Vig 3200 in there.

GrannySShifting

iTrader: (10)

I dont know. Your numbers/problems/ seem very similair to JNorris. All you need if for the lockup to come apart, and itll trash your new tranny. if it hasnt hurt it already. if it were my car it wouldnt be driven till that converter was cut open, and the trasn flushed completely

jfm

iTrader: (4)

When my stock trans gave up and I had my"built"trans installed I sent my old faithful PT4400 back to Yank and installed a brand new one as a precaution.The "built"trans was a POS so I had my stocker rebuilt and reinstalled the new PT4400.Turns out my stocker was not in that bad of shape[fluid not burned,no junk floating in the trans] and I could have put the old PT back in the rebuilt trans.

When my headers get back from recoating at Swain I can finally put fluid in the trans and drive it.I sure hope I dont have similar problems as my car has been down since November.When I add the 90mm FAST intake and TB it will get a new tune and dyno,if it will lock up I will post up the results for sure.

Slo01z28,I would follow Grannys suggestions because you dont want a bad verter to take the whole trans out.Better to be safe than sorry,that is why I changed my old verter for a new one that I now have to hope is OK.

JS,I agree with your last post.The only wild card now is the new PT4400 vs my old PT 4400.I will be getting retune at ESP as soon as I make sure,1-Trans works 2-[new headache]PT4400 works 3-[only if 1 and 2 are OK] I finally send it down the 1/4 mile,which is all that counts to me.4- add 90mm FAST and TB

slow01z28

iTrader: (9)

Jeff I ran the car today check it out on EFA


Rob

Debian Dog

Yeah that is what happened to my Yank 3000TT. The tranny tore apart and a piece of metal got stuck up in the clutch so it would not close correctly. I sent it to Yank, Mike pulled it apart and fixed it. He only charged me shipping!