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pre-bent transmission lines for TH400 available?

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Old Jan 9, 2023 | 09:11 AM
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Arrow pre-bent transmission lines for TH400 available?

im in the process of swapping the 4l60e to a th400 into my 01 trans am and was wondering if any vendors makes pre-bent lines or if i'd need to get the AN fittings?
i'm also planning on running an auxilary trans cooler FWIW.
here's what i have at the moment:
TH400
converter
dipstick
spohn cross member
parts i'm still piecing together are: tranny lines, driveshaft, shifter, way to read speedo or go mechanical?. any other parts i'm missing?
ny advice and suggestions are greatly appreciated

Last edited by fst100; Jan 9, 2023 at 11:17 AM.
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Old Jan 9, 2023 | 10:16 AM
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Originally Posted by fst100
im in the process of swapping the 4l60e to a th400 and was wondering if any vendors makes pre-bent lines or if i'd need to get the AN fittings?
i'm also planning on running an auxilary trans cooler FWIW.
here's what i have at the moment:
TH400
converter
dipstick
spohn cross member
parts i'm still piecing together are: tranny lines, driveshaft, shifter, way to read speedo or go mechanical?. any other parts i'm missing?
ny advice and suggestions are greatly appreciated

What about flexplate? What vehicle is this going into?
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Old Jan 9, 2023 | 11:17 AM
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sorry! this is going in a 01 fbody. i edited the OP.
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Old Jan 9, 2023 | 01:20 PM
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The OE cooler lines are relatively in the same place on the transmission as the 4L60E. The transmission fittings should both be a 1/4"NPTS (National Pipe Thread Straight). Swap your OE TH400 fittings over to the 4L60E fittings using a small amount of thread sealant. Both sets of fittings should have a slight taper where the fittings meet the case. You may have to tweak the old lines slightly to push them in.
AN lines would certainly work. On my S10 Ls Swap I used a 60 degree and a 90 degree at the transmission, 2 90 degree at the radiator. just make sure they are supported well as they go front to back to keep them from rubbing. I also found a box of separator clamps off of eBay for $10 or so. Don't go cheap on the line or fittings. everyone I know that did try had leaks. I got all my lines and fittings from my local speed shop and have no leaks...
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Old Jan 9, 2023 | 02:03 PM
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thanks @Tranzman for the advices.
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