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Tuning & Tech Center => Technical/Mechanical - sponsored by myrackbiz.com => Topic started by: Vince on February 16, 2009, 01:58:12 PM

Title: What gearbox?
Post by: Vince on February 16, 2009, 01:58:12 PM

Hi guys,
I'm just about to put an XF injected 250 Turbo motor in my TD 3.3 Auto. The XF motor has a 4 speed manual BW box, I want to go with manual but want a 5 speed. Running about 350hp (for road use only) what 5 speed would be an easy conversion, cost effective and survive with this combo.
Should I stick with the 4 Speed?
Any help will be appreciated

Title: What gearbox?
Post by: BigNorm on February 16, 2009, 11:55:12 PM

there isnt a cost-effective gearbox which will handle 350hp thru overdrive. the single rail wont last either. a toploader will handle the hp but doesnt have overdrive. otherwise u might need to up your budget.

Title: What gearbox?
Post by: Vince on February 17, 2009, 10:17:33 PM

ok, what should I up the budget to?
Has anyone tried fitting the Sierra cosworth 5 Speed to a crossflow? Externally they look the same as the BW-T50D used in some of the later XF's (so the gregory's manual says). I used one in my MK1 Escort drag car behind a 450hp Cosworth engine I did break it but only once I got to using the nitrous. Broke the engine a few times as well. I can get my hands on a Cosworth gearbox from UK but don't know if I can get it to fit.

Title: What gearbox?
Post by: forgott3n on February 23, 2009, 01:12:53 PM

You can get a T5 from Redline Auto that has had the standard gears replaced. Last time i looked into it they wanted $2500 for one.

Title: What gearbox?
Post by: BigNorm on February 24, 2009, 10:52:18 PM

i doubt a sierra box would handle the torque of a  turbo 250.  if its the same as an xf box then it definitely wont cos they were shit.

Title: What gearbox?
Post by: Vince on March 02, 2009, 10:46:21 PM

So what 5 speed could I use? Any ideas?

Title: What gearbox?
Post by: Vince on March 02, 2009, 10:48:00 PM

Here's what Burton's in Uk say about the Cosworth Box.

   

   Borg Warner T5 Gearbox
5 speed HD Borg Warner box with all alloy casing.
One of the strongest boxes fitted to a production European Ford car -  it originated from the American Mustang.
1” x 23 spline input shaft.
Fitted in Sierra/Sapphire Cosworth 2wd
Oil capacity 2.55 litres.
Standard oil grade ATF.

Title: What gearbox?
Post by: BigNorm on March 06, 2009, 08:49:13 PM

give it a crack. one way to find out if a 2.0L gearbox will handle the torque of a turbo 250

Title: What gearbox?
Post by: TF3webbers on October 09, 2010, 09:08:45 PM

this is probably abit late but a T5 will handle the power from most facons they are a good 5 speed i know of a few running in later model falcons running a over 350hp at the wheels and havnt had any problems with the box just the borg warner diff dosent like the power