21" but you still need to extend your breathers really bad! when I had the DTT installed I had a little bit of water in there and it was noticable on the bearing so I replaced them

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1980 Jeep CJ7 Buggy
SOA, D44/ FF14B, SBC 350, SM465, NP205, 108" WB, 37" MTs

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Tried to extend my breathers today with two friends. Did the front and rear diffs easily. Could not find where the t case terminated (lost the hose around the bell housing) and could not find hide nor hair of the of the transmission breather. It was not anywhere I have read on here. There was noting attached to the tranny dipstick and we had a clear shot of it it's whole length.
When I have my new fron diff installed and regeared, I am going to ask the tranny guy to drop the tranny and extend the breather for me. He's a member of the local Jeep club so it's not an unsual request for him.

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2006 CRD http://www.UtahPowderCoatings.com/ http://www.gorecon.com/ I'm kind of a big deal.
RL rear bumper, ARB front bumper, Mile Marker winch, Power Tank, Skids by Mopar & Skid Row, RL Super Skink Sliders, 235/85R16 MTR, Air Flow Snorkel, DTT, 4.10 gears, Frankenlift II, Katskin leather, JL Audio stereo, Rosen video.