The Btr 4 Speed Auto Thread.

[Worm]

Maybe *Beep* should bring his to you Danny?

[BOZZTURBO]

worm ,

[RIP_HSV]

So it seems an external tranny cooler is the way to go.

I dare say it is to bypass the stock one.

Can someone please advise the size required (for say a tuned 245rwkw car)?

Thanks,

Check out B&M cooler kits

[RIP_HSV]

Why waste your money on those electronic shift kits when you can do the same via the tune in these cars.

People do vary the clutches they fit, but realistically the factory ones is all mine has. its good enough.

Cryogenic the parts do help, but you can still break the plantery's.

Billet servo necessarily required, but helps with bigger power, but is known to break the band. Where some shops even weld the band to increase its strength.

good for those who want to keep the car stock......

[YOB POM]

The S3, S4 and S5 solenoids are all there to provide soft shifting for the girls. By shutting off the S3 and S4 you render the

S5 redundant and it maintains full line pressure to the bands and clutchs. Fluids are going directly to the bands and cluches instead of bypassing through these solenoids which gives extremely firm shifting.

You dont need to modify the box internals, you dont need to drop the pan, you just need to disconnect the solenoids and trick the ECU into thinking the solenoids are still there by putting a couple of resistors to ground. It is so simple and cheap and works great.

Yet people are still talking about external oil coolers to save their box, different oils, electronic shift kits which are nothing compared to this mod. Its all about getting the box to shift hard and fast under load which makes it survive more than anything else. Yet I find this mod so overlooked but the guys who do try it find its a great bang for you buck mod.

Its similar to what Headsex said above"" I've seen modifications to remove the bias feed to the back of these circuits, which as a PRO allows maximum pressure, however with a CON of Maximum pressure 100% of the time, and NO PCM controllability.

Not recommended, however a lot of auto shops do this.""

Whilst I am no pro box builder, I personally do not want any PCM controllability on the BTR for performance purposes as IMO its the soft shifting circuits in this box that stuff it up in the first place so just get rid of them.

Hows this done?

John.

[XR64LT]

YOB POM, just in your sig I didnt think blue print came out in 04 models, isnt that shockwave. could be wrong though.

[Worm]

Definitely did... Shockwave came out on series 2...

[turbotrana]

I posted this mod on this forum November 2004. See thread.

[r32dan]

hey guys, read the above link, and although it is a very clever little trick (as resistor mods always are) I would rather spend the $70 or so to buy the actual shift kit that retains your engine braking, and allows you to adjust the firmness of the shift....but......is there any point in doing so if I plan on flash tuning the car....I hear that the flash unit also firms up changes as well, or would it not really compare with the results I would get from the dedicated shift kit? oh yeah, and also, would they be compatible together?

[tquarrell]

It appears that the planetary gears are the week point.

Does anyone know the model number of the 4 speed auto used in the xr6 turbo's?

The reason I ask is that when the xr8 (500nm) and gt (520nm) were introduced there was a 6 month wait because btr & fpv designed a whole new box (internally) called the m97-019 because the box used in the xr6 turbo (450nm) and 5.4 3v (470nm) wasn't strong enough.

FPV worked closely with local automatic transmission manufacturer BTR to deliver a premium performance automatic transmission (optional on all models) that meets a wide range of tough local demands, including high ambient temperatures and heavy towing.

As a result of close liaison between BTR and FPV, the new M97-019 auto is a transmission engineered to match the characteristics of the Boss engine.

After an intensive development period and extended durability testing, FPV’s new automatic transmission has a special high torque gear set and torque converter unique to the Boss engine.

http://www.performanceforums.com/forums/archive/index.php/t-67140946.html

So I guess my real question is are the FPV/xr8 auto's any stronger than the ones used in the xr6 turbo, and can they be/has anyone fitted one to an xr6 turbo?