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THM-425 · TurboHydramatic 425 Conversions

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Group Information

  • Members: 209
  • Category: General
  • Founded: Mar 28, 2002
  • Language: English
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Activity within 7 days:

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Description

This group is intended for the discussion and sharing
of information related to the vehicle conversions using the
GM Turbohydramatic 425 transaxle (THM425).
I started this group in response to the complete lack of
information on the internet regarding these transaxles.
Any and all information related to THM425's that I find
will be available here. as well as links to webpages with
information.
Although the main focus will be on conversions (things
like mid engine mini-trucks, 500caddy powered fiero's)it
will also be a place to exchange information about
rebuilding, shiftkits,modifications etc..
THM-325 owners are also welcome here.

Most Recent Messages

  (View All)
1966 Toronato trans for sale NC/VA
Hi Guys. Been awhile since I've been on here. Found this trans a couple of days ago. Figured I'd try to get it, if he still had it. Turns out he does, got
Posted - Tue Apr 30, 2013 10:04 pm
T
theoldsarge2002
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Re: Ford Fiesta THM-425
The car is set up with 3.5" droop and 2" bump it has slightly more travel than that but within -3.5 +2 bump steer is minimal and camber gain is 1 degree per 1"
Posted - Wed Aug 22, 2012 3:49 am
waynger08
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Re: Ford Fiesta THM-425
Years ago I spoke with the owner of Kelmark and he told me to limit my suspension travel to 3.5" total for the rear for street driving. Wayne, you must not
Posted - Tue Aug 21, 2012 3:10 pm
Swiss
swiss_88310
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Re: Ford Fiesta THM-425
Well, its supposed to be 2.5 but it looks like less, that's under the 3rd member and the car isn't finished yet so I won't know for another month if I'm in
Posted - Tue Aug 21, 2012 2:20 pm
Waynger
waynger08
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Re: Ford Fiesta THM-425
Wayne, I was thinking the other day about asking you what kind of ground clearance that you had and you mentioned it in one of your posts, 2".. That is a
Posted - Tue Aug 21, 2012 4:01 am
Swiss
swiss_88310
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Message History

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
2013 1 1
2012 1 3 3 13 6 11
2011 1 11 1 3 3 3 1 2
2010 2 7 1 1 2 12 11 2 9
2009 8 29 21 10 39 84 24 3 2
2008 1 5 5 3 1 1 6 18 15 5 12
2007 6 16 19 24 41 7 8 7 10 1 3 3
2006 18 14 7 23 7 7 4 4 1 10
2005 9 15 13 18 17 7 3 3 5 6 2
2004 9 2 16 12 40 49 39 12 14 31 34 12
2003 8 8 6 1 46 34 37 40 24 18 2
2002 8 1 1 5 2 1 1

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