TH-350 or 400 conversion
12-21-2006, 09:39 PM
#1
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TH-350 or 400 conversion Just wondering what it takes to do either of these I can get th-350's farly cheap from friends and with my new build be done and my a4 already slipping on the
3-2 down shift at WOT i don't think it will last to long after my build.
3-2 down shift at WOT i don't think it will last to long after my build.
12-21-2006, 11:32 PM
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thats what i was thinking of going with but dont really know what I would need how to set-up the shift linkage and speedo also the TC and flywheel and would i still be able to run a locking converter. lol i tried a search but didn't really find anything usefull
12-22-2006, 12:15 AM
#4
you will need a new crossmember, driveshaft, and all the little things to make the speedo work. i dont think you could get a lock-up comverter and as far as flywheel you could use the same a standard flywheel like what you have buut preferably something that is sfi approved of course.
12-22-2006, 12:19 AM
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hmm well i guess i will just have to build my 4l60e I really want a lock-up do to it will be a weekend car but still driven. I am not the type to just take it to the track or just take it out on the street for an hour oh well thx for the help tho.
12-23-2006, 11:26 AM
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I believe you can use your stock driveshaft if you get a turbo 350 with the longer tailshaft, i cant remember the exact length but it is identical to the 4l60e.
12-23-2006, 12:52 PM
#7
The 4L60E is VERY capable IF and only IF built by a select few shops around the country. It gets a bad reputation because most shops can't do it but claim they can and when it fails they blame the tranny.
ProBuilt Automatics, FLT, Rossler are the first three that come to mind but are by no means a complete list and a few of those guys have customers with 9 second cars running 4L60Es one of those is a 4400lbs Impala running 9.6 at 146mph. Point being don't listen to anyone who says this tranny can't take it, they just used the wrong shop.
ProBuilt Automatics, FLT, Rossler are the first three that come to mind but are by no means a complete list and a few of those guys have customers with 9 second cars running 4L60Es one of those is a 4400lbs Impala running 9.6 at 146mph. Point being don't listen to anyone who says this tranny can't take it, they just used the wrong shop.
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12-23-2006, 01:22 PM
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ya i figured it would be able to be built i just thought if i could get a th-350 for basicly free then i would swap but that was only if the TC was locking. I have some places in mind. right now the only problem I have with it is on the 3-2 downship at high speed like say i am doing 70 on the HW and go WOT it jumps RPM before it starts to move so probably slipping.
12-23-2006, 02:06 PM
#9
Drop the pan change the filter and consider getting a valvebody gasket kit so you can clean the two screens in the seperator plate. On a bad build I had before the ProBuilt I had the screen on the pressure rise solenoid(proper name escapes me at the moment) get plugged and stop pressure rise at all times. Really though if there is enough clutch debris to be plugging screens it aint long for the world anyway though.
