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converter less auto 

 

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 Post subject: converter less auto
Posted: Wed Oct 24, 2012 12:02 am 
Fordmods Newbie
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Age: 32

Posts: 3

Joined: 19th Mar 2010

Ride: ba falcon

Location: adelaide
SA, Australia

does anyone kniw if you can convert a ba trans to run without the converter
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 Post subject: Re: converter less auto
Posted: Wed Oct 24, 2012 11:00 am 
Getting Side Ways
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Posts: 836

Joined: 1st Apr 2005

Gallery: 4 images

Ride: EF XR6 Wagon, AU2 XR6 VCT

Power: 148 rwkw

Location: Auckland
New Zealand

Almost anything is possible. But why would you want to?

Back in the 70s, dedicated drag cars sometimes used a "clutchflite" transmission - a Mopar Torqueflite 3-speed auto adapted to a normal manual trans bellhousing, clutch and flywheel. They ran a manual valve-body in the trans and a ratchet shifter. The trans case needed to be cut down and modified to mate to the bellhousing, and I believe the input shaft needed modifying too. I imagine there were other changes too. The technique was to use the clutch to launch, then bang clutchless into 2nd and 3rd.

It seems this mod has been done to various US-sourced auto trans (http://ggordon528.tripod.com/shop/cpe/clutchflite.html).

Presumably you could do the same thing with a BTR 4-speed, but I'm not sure how the fluid flow would be affected without the convertor. Might not be a lot of fun in daily driving anyway. This technique is largely obsoleted by high-stall torque convertors. If you are going to do some major engineering anyway, why not build a switch-pitch convertor - it can operate like a high-stall on launch, but like a factory (or tighter) stall at other times (http://www.webrodder.com/article.php?AID=424&SID=6)

 

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 Post subject: Re: converter less auto
Posted: Wed Oct 24, 2012 3:07 pm 
Moderator
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Posts: 14513

Joined: 7th Nov 2004

Ride: ford falcon au3 xr8

Location: a shit suburb in sydney
NSW, Australia

its a bit unrealistic,
yes it can be done to some trans and had been done in the past but if you want to get rid of the torque converter you will need a clutch to disengage everytime you stop...
imo it would be cheaper and easier to convert it to manual...
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