Trans Selection?

[RSWEPN]

Another vote for the C4. My cousin has one behind his clevo, makes 700hp+ on low boost and handles it fine.

[xb351]

dude use the c4, there are mazda's running 8's on them,

all built by als race glides,

What are they?? Light cars that don't have instant toque

Anyone willing to give me a supposed strong c4 and convertor? So I can show how strong it aint especially when street k's are involved.

I had numerous big $ c4 quotes and none would warrant the box if the clutches burnt out from street use. What good is that crap? If I can run a powerglide on the street with a 5400rpm stall. Why can't I run a c4 with the same size stall? I'm not sure why people won't admit the C4 requires constant refreshing. It ain't dear to do but it would be annoying.

I had two companies wanting to use me as a test mule for their box's. I don't opt in because I didn't want to be a test mule since the last box could have killed me.

Here's why I moved away from c4/10's. The only thing I never got around to doing was fitting a alloy sump and rollerizing the box. This was a full manual stage 3 as some would call it with a 4500rpm stall. At the time I had 410rwhp. In a big car that does street k's.

[xb351]

Just as a further note. I don't hate c4/c10's. It took a workshop 4 years to convince me to go a powerglide. I was saying "nope it has to stay a ford box, keeps it simple". What it was doing was keeping me poor due to unreliability

What is my point? C4's have power and weight limitations to remain reliable.

Even Trick and manswetto use a manual behind their high hp clevo. I saw it at the Holden vs Ford show.

[Grumpy Rooster]

Even Trick and manswetto use a manual behind their high hp clevo. I saw it at the Holden vs Ford show.

They use manuals for dyno comps but autos for racing. Not sure what type though. Think its a Powerglide.

[jmac]

With regard to stall rpm, aside from issues of box strength between the two, I think it would be fair to argue that you'd possibly have less call to run as high a stall with a 3 speed, as the greater torque multiplication of the lower gear would be more than the tyres could handle (assuming that the choice of convertor stall rpm was correct for each). That then means that for the same overall combo, the glide combo would actually stress the convertor itself far more. You'd be 'on' the convertor for a hell of a long time vs a 3 speed.

The rotary example probably still holds true to some degree, but I'd put forth the fact that a bunch of US guys with relatively heavy cars with torquey v8s have pushed the c4, when properly prepped.

Me? I would personally have looked at a c6 or glide. But I'm prepared to have a loose convertor and the lower overall drivability on the street. I'll go a step further on this, but not ford related.

not naming names, but more than a few places feature in magazines (ads or even articles) due to their 'breakthrough' modification of transmissions previously thought to be 'weak' , Like for example the holden trimatic. They claim to be drag suitable, and there are a few drag racers running them. I can state categorically that personal experience with a friends car (HQ coupe std weight modest efi headed 308, capable of a high 12 on decent tyres) - it couldn't get a trimatic to last more than a couple of weeks on the street. Yes he did cane it, but the trans builder was told this (specifically he was told it gets caned mercilessly every bloody day) and still pushed his trimatic. Well after 3 breakages inside a month, and the trans builder not wanting to come to the party, my mate went elsewhere (what's even more of a shitter is the original trans builder had an excellent name, and decent results with other autos). he ended up with a th350 from Jim Walton (it was a borderline looking at a th400). that trans has been in there a few years now, with harsher treatment that Mike Tyson's date.

So the short version - even though the consensus is more toward a c4, I'd back xb351s comments - because despite everyone saying a c4 can (or might) be able to to be built to handle it, there is absolutely no grey area or drawback to choosing a c6 or glide. So why risk it? I know I'd be kicking myself if I spent money on one trans only to have to spend that again, or a touch more, to go to the beefier option. May as well bite the bullet.

[xb351]

Spot on 3spd generally requires 1000rpm less than a 2psd box Jim Walton has build a box for a car I know but it's a rather low power application (mid 14 sec car).

I used 4 different builders over 5 box's. The 5th box used the same builder due to warranty (4th box lasted 199k's). Car wasn't even registered! Was running around on permits. We built it stronger again and got 6000k's out of it. It's the box pictured above.

A bloke I know from a well known parts supplier uses a well known builder here in Vic. 550hp 378 or 383 and it killed the foward clutches Car runs mid 11's and gets quite a bit of street use.

[Dansedgli]

Personally I would go a glide as well. Reliability rules.

C4's get great results in the states but they have way more support over there.

Myself and a few others who have turbo falcon 6's did a lot of searching and couldn't find anywhere locally to build tough C4's to handle 300+rwkw and guarantee they would last.

Even a ford 6 workshop has been looking and cant find anything.

But you can buy C4 boxes in the states that will handle 1000hp guaranteed. The only conditions are that the box be serviced regulary by the shop who built it. Its unfortunate we live so far away.

[80DGY]

Ideally I would like a C6, but I seem to be having some dramas locating one

I want one that needs a rebuild/freshen and I want to have a crack at building the box myself, that was the attraction to a glide, simple (ish!) to build.

I know a C4 will handle horsepower but I'm realistically concerned about the weight of the truck it's pushing...

[slo360]

C6, or if you want a strong box find someone who will do a case or adapter to put a 727 behind your donk, strength and thier effecient, check USA sites and try and find someone moving big weight with big torque. C4s are ok, but small clutches need love.

cheers

[xb351]

Ideally I would like a C6, but I seem to be having some dramas locating one

I want one that needs a rebuild/freshen and I want to have a crack at building the box myself, that was the attraction to a glide, simple (ish!) to build.

I know a C4 will handle horsepower but I'm realistically concerned about the weight of the truck it's pushing...

Try a F100 wreckers. Quite a few used c6's behind clevelands.

[6.97]

C6, or if you want a strong box find someone who will do a case or adapter to put a 727 behind your donk, strength and thier effecient, check USA sites and try and find someone moving big weight with big torque. C4s are ok, but small clutches need love.

cheers

Of course.

Can't believe someone (or me) didn't suggest the torqueflite sooner.:D

[xb351]

hehe :D the torqueflite is an awesome box. It's very over engineered from the factory.

[mizone]

There's a mob in the US, for around the $2K mark, do a electronic over drive kit.

Bolts to the back of the existing box (i.e C4) and gives you 6 forward gears. 1st, OD 1st, 2nd, OD 2nd etc.

Reviews I've read so far say it's in it's infantcy but once sorted is will be the way to go.

Now what was their name:huh:

[xb351]

Geardrive, Gear vendors?? Not sure 100% sure of the name. I've seen them before. It'll be good if they can handle punishment. I've looked at one for the powerglide but aren't sure that the OD won't cause issues due to the stall.

I've also heard of lock up convertors for older style boxes. Still can't find whether they are a myth or not

[mizone]

Found them! http://www.gearvendors.com/