Re: TKO Gearbox vs Diff Ratio
My XD is only running 13's at the moment (still only have OC 2V's and mild hydraulic cam).......looking at going alloy 3V's and a big solid cam......just trying to get info off other people who may have 11 sec car using a 4 speed manual.
The tremec conversions aren't too bad. I got a brand new Tremec TKO when I was in the USA - it only cost me US$1350 brand new with a shifter and heavy duty driveshaft yoke (thats AUS$1755 at todays exchange rate!)......dodgy buggers here are charging $3500-4000.
First thing you'll need is a new bellhousing. The bolt pattern is the same as the toploader but the input shafts are slightly longer. Some people machine a bit off the input shaft and use their toploader bellhousing but this voids your warranty........I guess if you buy one second hand it doesn't matter. "Dellow Automotive" in Sydney cast their own alloy bellhousings for tremec conversions - that was $400 and now the box bolts right up - fits my hydraulic clutch and starter motor. There are spacer plates to fix this problem too but warranty doesn't allow them.
I got a TKO which has a 26 spline input shaft so you'll need a new 26 spline clutch disc. The standard tremec 3550's have 10 spline input shafts, same as toploader.
The TKO output shaft is 31 splines and my new yoke is F100 size! It won't fit my XD so I have to get my driveshaft modded once it's fitted. Standard Tremec is 28 spline output shaft. Can't remember what toploader is?
My XD electronic speedo will fit straight in, or mechanical ford if you have one. You'll need a new plastic speedo cog (Dellow's supply them). DON'T use a toploader one - they're OPPOSITE direction splines and will chew out.
Spiggot and clutch release bearings fit straight on....I hope!
And I think thats about it!
Biggest thing I'm looking forward to is the overdrive. It's 0.68 so it will drop a third of the RPM. 3300rpm at 100kph will now be 2200.
393 Tremec TKO 9"