402bb/th400 fitment - The 1947 - Present Chevrolet & GMC Truck Message Board Network

DJ72CHEVY · 05-23-2005, 01:44 PM

I curently have a 350 with a manual 3 speed. I was planing on rebuilding a th350 to replace the 3 speed, this will fit without any driveshaft mods.

I just came across a 402bb and a th400 tranny and I have a few questions.

1) Will this combination fit without altering the driveshaft?

2) If I pass on the th400 and just swap the 402 and use the th350, this should work with just some firewall mods, right?

3) I have a LWB stepside with a 2 pc. driveshaft, should I go with the best (cheapest) combo and get a 1 pc. driveshaft?

Thanks,

jhow66 · 05-23-2005, 02:01 PM

1-no
2-no firewall mods needed-everything else works except motor mounts-you need BB mounts and towers.
3-no -keep your two piece.

05-23-2005, 01:44 PM	#1
DJ72CHEVY Registered User Join Date: Nov 2004 Location: Brenham, Texas Posts: 79	402bb/th400 fitment I curently have a 350 with a manual 3 speed. I was planing on rebuilding a th350 to replace the 3 speed, this will fit without any driveshaft mods. I just came across a 402bb and a th400 tranny and I have a few questions. 1) Will this combination fit without altering the driveshaft? 2) If I pass on the th400 and just swap the 402 and use the th350, this should work with just some firewall mods, right? 3) I have a LWB stepside with a 2 pc. driveshaft, should I go with the best (cheapest) combo and get a 1 pc. driveshaft? Thanks,

05-23-2005, 02:01 PM	#2
jhow66 Registered User Join Date: Jun 2002 Location: Knoxville Tenn. Posts: 3,058	1-no 2-no firewall mods needed-everything else works except motor mounts-you need BB mounts and towers. 3-no -keep your two piece. __________________ 56 Chevy Bel-Air 2dr. HT (purchased new) 71 Chevy Cheyenne SWB PU (502HO) 65 GMC short bed step--work in progress and my gofer



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