Body laying on transmission--help! - The 1947 - Present Chevrolet & GMC Truck Message Board Network

jac70ss · 10-03-2011, 12:16 PM

I just put a 700r4 in my 66. It previously had a 400th. Now the transmission is butting up to the "pinch weld" in the trans tunnel. the only difference is I moved the crossmember about 4 inches. I need to drop the tail about an inch to give me clearance. The truck has a low tunnel floor in it. (is that why everyone likes the high tunnel?) Just wondering if anyone else has had an issue. Do I need a different crossmember?

padresag · 10-03-2011, 01:03 PM

what are the body mounts like, new or old. ant rust in the cab supports or floors.
you may have to do some work on that seam. c10 or 20?
ron

Slammed50 · 10-03-2011, 01:35 PM

Take some pics of where it's hitting and we can help you out a bit more knowing exactly what's going on.
Posted via Mobile Device

kieth · 10-03-2011, 02:12 PM

I used newer style motor mounts (91 burb) moved forward all the way and used a cpp transmission crossmember. My 350 700r4 cleared just fine. (very lucky wasn't I) Kieth

jac70ss · 10-03-2011, 02:24 PM

I'll try to get some pictures tonight, may be hard to tell. The truck is back together. Had i known there would have been a clearance problem I could have trimmed or bent the pinch weld. It's a lot more difficult at this point.

Slow Build · 10-03-2011, 03:38 PM

I know that when member Chevy Fleetside installed his 700R4 he had to bend that lip back to get it to fit.

**Chevy Fleetside** · 10-03-2011, 04:26 PM

Quote:

Originally Posted by Slow Build

I know that when member Chevy Fleetside installed his 700R4 he had to bend that lip back to get it to fit.

That is what I did with both trucks. It only hits at the top so if you be nice with a hammer and bend the lip back about 1/2" it will clear. Can you see it in this picture? Just follow the lip and you will see how little it has to move. Oh yeah. easier to do with the tranny is not in there.

10-03-2011, 12:16 PM	#1
jac70ss Registered User Join Date: Jun 2009 Location: Murfreesboro TN Posts: 49	Body laying on transmission--help! I just put a 700r4 in my 66. It previously had a 400th. Now the transmission is butting up to the "pinch weld" in the trans tunnel. the only difference is I moved the crossmember about 4 inches. I need to drop the tail about an inch to give me clearance. The truck has a low tunnel floor in it. (is that why everyone likes the high tunnel?) Just wondering if anyone else has had an issue. Do I need a different crossmember?

10-03-2011, 01:03 PM	#2
padresag Registered User Join Date: Feb 2008 Location: Sidney,b.c. Posts: 4,425	Re: Body laying on transmission--help! what are the body mounts like, new or old. ant rust in the cab supports or floors. you may have to do some work on that seam. c10 or 20? ron

10-03-2011, 01:35 PM	#3
Slammed50 Registered User Join Date: Apr 2011 Location: Albuquerque, NW Posts: 121	Re: Body laying on transmission--help! Take some pics of where it's hitting and we can help you out a bit more knowing exactly what's going on. Posted via Mobile Device __________________ Check out my build thread for my '63: http://67-72chevytrucks.com/vboard/s...49#post4806049

10-03-2011, 02:12 PM	#4
kieth Registered User Join Date: Sep 2010 Location: Tulsa, Oklahoma Posts: 1,925	Re: Body laying on transmission--help! I used newer style motor mounts (91 burb) moved forward all the way and used a cpp transmission crossmember. My 350 700r4 cleared just fine. (very lucky wasn't I) Kieth

10-03-2011, 02:24 PM	#5
jac70ss Registered User Join Date: Jun 2009 Location: Murfreesboro TN Posts: 49	Re: Body laying on transmission--help! I'll try to get some pictures tonight, may be hard to tell. The truck is back together. Had i known there would have been a clearance problem I could have trimmed or bent the pinch weld. It's a lot more difficult at this point.

10-03-2011, 03:38 PM	#6
Slow Build Registered User Join Date: Sep 2009 Location: California Delta Posts: 2,163	Re: Body laying on transmission--help! I know that when member Chevy Fleetside installed his 700R4 he had to bend that lip back to get it to fit. __________________ Name: Rich Current Ride: 1964 C-10 Short Fleetside Daily Driver: 2005 GMC crew cab short fleetside /2001 Chevy Tahoe Past GM Trucks: 1959 GMC short stepside 1968 GMC short stepside-4x4 1973 Chevy short stepside 1989 Chevy short fleetside-reg cab 1993 Chevy short fleetside-Xcab 2002 Chevy short fleetside-Xcab Save the dinosaurs, use synthetic oil.

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