MPH at 3,000rpm in all gears in a Probe/ 626 transmission?

[Yoda]

[quote="wytbishop
Did you ever build this transmission? How did you acheive that final drive? Where did you source 1st and 2nd gear?[/quote]

I built 2 of them, One with a 4 cyl bellhousing flange and the other with a V-6 bellhousing flange. The final drive ratio is a stock Mazda OE ratio not used in any car sold in North America or Asia. Imported several complete and broken gearboxes originally in (2002-2003) 323-F and Mazda 6 with the 2.0 RF-T back in 2005. First gear came from an early Ford Escape with the 2.0L Zetec. Second and forth (made an error in my previous post 4th should be 0.97 not 1.03) came from a G-MTX found in a (BJ) with the FS-DE. All syncros, forks, etc are post 02/ 2002 beefed up production parts. The one built for the 4 cyl was bolted up to a beefed up '98 2.0L Zetec and in a car I sold recently. The older gentleman I sold the car to is amazed at the gas mileage the car gets and his kid like the rumble and thinks it pretty fast. The gear ratios are actually well stepped for an engine making at least 150-160ft-lbs at the wheels. With more power the advantages is there is less torque multiplcation throught the final drive gears, less wasted power to wheel spin and longer time in gear in the power band between shifts.

[Nd4SpdSe]

With more power the advantages is there is less torque multiplcation throught the final drive gears, less wasted power to wheel spin and longer time in gear in the power band between shifts.

Cool, I've always theorized the same thing.

Yoda, can you confirm that the Mx-3/Probe is 4.39:1 while the 626/Mx-6 are 4.11:1 and if there are any exceptions to it?

[Yoda]

Unfortunately I don't have any Ford factory documentation for the Probe GT and no longer have contact with the cousin of the guy that was head of technical training for FWD drivetrains for Ford Canada that I could get info from. I believe that the PGT all had the 4.388 but specs published in an issue of Road and Track back in 1993 comparing the MX-6 to the PGT showed the final drive to be 4:11 on both. Mind you there were some changes made to KL after all the Warranty reworks done by the guys at SLP in Montreal toward the end on 1993. This does not rule out that drivetrain mods as well. Looking at the numbers to keep the performance specs the same I would from a mathematical stand-point say the PGT would need to have the 4.388 final drive just because of stock tire size between the PGT and MX-6/ 626/ Telstar TX-5. To have the same number of engine revs at any give speed with the diameter of the 225/50/16 on the PGT and the 205/55/15 on the MX-6/ 626/ Telstar TX-5 you would need to adjust the final drive ratio for compensate for tire diameter. Even still it is not a 100% speed match The PGT would still turn a few RPM slower at any give speed. If the PGT had the 4.11 final drive given the tire diameter difference It would have effectively be given the equivalent gearing to 3.91 on a MX-6/ 626/ Telstar TX-5 which would throw all published performance numbers out the window for the PGT and drop the KL-DE below it peak torque band for best all round performance on the street.

[fowljesse]

I've been chatting with a guy for a while that I found at random, while researching my strange ideas, and he has just as strange ideas, but has the ways and means to test and prove them. We were talking about transmissions, and how I want taller gears, and he swore me to secrecy about something he was working on. I guess he's deemed it possible enough to divulge, so here it is:
He found a 6 speed transmission that can be mated to a K series engine. "The candidate is a 2006 Pontiac G6 F40 6 spd transaxle that came only on the 3.9L option. The engine had 240 hp from the factory. G6 owners are saying that the transmission should be capable of 500 hp. And according to a chart I found on the gear ratios with the final drive ratio -7K RPM theoretically would be = 200 mph. Here are the gear ratios: final drive -3.55, 1st -3.77, 2nd -2.04, 3rd -1.32, 4th -.95, 5th -.76, 6th -.62". - Michael - Xtremethings.com

[Nd4SpdSe]

So how do you know it'll mate to the motor?

[tehbrookzorz]

And in recent headlines, hundreds of Pontiac G6s were reported stolen across the country last night. There are no confirmed arrests at this time, but police believe Mazda owners may be involved...

[Ryan]

I would think... it doesn't. It would be nearly impossible(or extremely coincedental) for a 3.9L engine to mate to a 2.5 tranny, between an import and an domestic, who have NO designs in common. They might be darn close, where re-drilling and tapping either the block or tranny makes it possible, with a modified driveshaft, too.

[Nd4SpdSe]

Custom axles too, custom tranny mount, curious about the clutch/flywheel arrangement and hopefully it's not cable driven.

[tehbrookzorz]

I hope you guys look into that, but I also hope this thread doesn't veer too far off topic.

[fowljesse]

As I get more info, I'll post it up. He's putting it into a different car (a Porsche ), but if it works out right, he'll make the adaptor, and such. I, and everyone else would have to fit the linkage, and get axles, etc....

[Nd4SpdSe]

Ya, i found the thread by KLZE_Porsche on Probetalk about that. Still not sure about it, but we'll see.

Yoda, can you confirm that some Probes came with 4.11:1?