I own a Calais Turbo PSI-03L and it has the standard 5sp in it but it wont be around much longer by the sound of it so instead of rebuilding it i want to go an auto. The car makes 492hp at the wheels and im always thinking about more so what auto can handle it? I dont want to get a 2sp Powerglide cause i dont want it to just be a drag car, can a Jatco 4sp be built to handle that kind of power or should i go a Trimatic maybe.Any ideas would be much appreciated and if you have any ideas on cost $$$$ that would be good to.

how long did the 5 speed last with that sort of power?

Its still going but it sounds pretty bad and its getting hard to shift.

Down here in Melbourne the really quick cars that race at Calder and Heathcote use Raceglide's built Tri-Matics or the 2 speed power glide both have been proven to be reliable on the track takeing the horsepower no problems, It's about $5,000 drive in and out for a Raceglide's Tri-Matic conversion on you can save a few bucks a go to the Castlemaine Rod Shop and use the Rod Hadfield conversion kit to adapt power glides, tri-matics, and turbo 350 transmissions although a little heavy in weight they are pretty strong. Hadfield only supply's the kit, example mounts, bellhousings, speedo cables, you still have to get a new tailshaft made up shifter, console and as well as a new Hi-Stall convertor, tranny coolers and the beefed up auto. I have heard of the Ford C4 tranny being used but never seen a VL done with this conversion. I'd go a Tri-Matic with a trans-brake if it were me they weigh stuff all and can take the punishment. I don't think a Jatco 4 speed can handle that power you stated in the long run it will **** it self, I don't care who builds it either if they are so beefed up and can handle the power, then why do all the top cars on the strip use alternatives, in reality a Jatco 4 speed that has been modified with a big stall has problems once the boost is raised past the 15psi mark after that it's only a matter of time before she blows up. On a street car the Jatco is fine as long as you maintain them and don't abuse them. :roll: Some original photos have not been recovered yet.

PSI what clutch were you using and where did you get it?

Thanks for your help i thought the Trimatic would be the way to go and i dont really want to be limited to a 2sp Powerglide for the street. Looks like ill have to do some saving then cause thats pretty pricey but its about what i expected.

Its a 5 puck brass button clutch and it hasnt slipped yet even at the drags with slicks. I got it from Western Clutch in Sydney

If you really want a manual get a r33 gts-t gearbox. Theres silvia around the place with a gtr motor making around your power and it apparently holds up really well.

PSI-30l, i have a trimatic for sale!! from Hugo's. it has a 4500rpm converter and transbrake. it is unused, still sitting under the stairs at my house. cost $5100. give me a call if your interested on [phone removed].

I been told by a VERY reputable drag transmission makerr to stay clear of Trimatics for drag use instead use a c4 if u want a 3 speed. or a glide

Yeah ive heard a few people talking about going for a C4 do you have a rough idea on what a conversion like that would cost including building the C4?

im in the same boat !! i need a really strong Auto..... or should i go for a Manual???

all up its about $5000 to convert to a proper c4 conversion drive in and out. I kept breaking manual boxes to much so jsut brought a c4 box and is built to hold 600hp+ only prob with them is finding a adapter plate to suit.

Quote: Originally Posted by VLT87 all up its about $5000 to convert to a proper c4 conversion drive in and out. I kept breaking manual boxes to much so jsut brought a c4 box and is built to hold 600hp+ only prob with them is finding a adapter plate to suit. would it hold approx 740hp??? cos thats about what matts awesome machine has! Matt: good to finally have you on here..

we will soon see

is it worth doing up a Jaco ??