th400 tranny spacers Longhorn related? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Solver · 05-19-2008, 03:30 PM

had to swap out a th400 from a longhorn into a stepside yesterday. I noticed that the longhorn th400 had 2 spacers installed above the tranny mount and the stepside had none. does anyone know if this is correct?
thanks
Solver

LONGHAIR · 05-19-2008, 03:45 PM

I sounds right. They would be "correcting" the driveline angle because the carrier bearing is further away and that would take some of the angle away. I don't know if it is a "factory " thing though, or an adjustment that someone made in a effort to solve a vibration or something.
There are some "Longhorn" experts that may chime in here and know for sure.

I will edit your Title and see if one comes along.

Green Machine · 05-19-2008, 07:31 PM

Don't know if this helps, but our 71 C20 came with a 3/8 spacer between the tranny and mount. It uses a TH350. We added a spacer on the 1970 to help the engine sit more level.

Longhorn Man · 05-19-2008, 08:40 PM

if I'm not mistaken, all big block trucks had a sppacer between the mount and the cross member.
The only addition on the longhorn, is a spacer between the bottom of the frame rail to the tranny cross member due to the added height of the taller frame.

**SOON2BLAZE** · 05-19-2008, 09:17 PM

Theres a set on ebay now ( no linky)

**uncle** · 05-19-2008, 09:37 PM

I think the first guy is talking about the spacer between the trans. and the trans. mount,not the crossmember.

LONGHAIR · 05-19-2008, 09:52 PM

Quote:

I think the first guy is talking about the spacer between the trans. and the trans. mount,not the crossmember.

I am sure that he is aware of that.....just elaborating. The effect would be the same though either way.

I knew that Andy would clarify this.

05-19-2008, 03:30 PM	#1
Solver Registered User Join Date: May 2000 Location: Storm Lake, Ia Posts: 1,449	th400 tranny spacers Longhorn related? had to swap out a th400 from a longhorn into a stepside yesterday. I noticed that the longhorn th400 had 2 spacers installed above the tranny mount and the stepside had none. does anyone know if this is correct? thanks Solver __________________ 1972 Cheyenne Super 20 LWB-Blue 1972 Cheyenne Super 10 LWB-Black 1972 Cheyenne Super 10 LWB-Red 1972 Cheyenne Super 10 LWB-green 1972 GMC 4x4 LWB-White 1971 Cheyenne 10 LWB-Ochre 1971 Cheyenne 20 Longhorn-Copper 1971 Cheyenne 20 Longhorn-Black 1969 Custom 10 LWB-lt blue 1968 GMC 3/4 ton-green 1968 1/2 ton swb stepside-silver 1967 Chevrolet CST 10 LWB-green 1967 Chevrolet custom 20 LWB-Maroon

05-19-2008, 03:45 PM	#2
LONGHAIR just can't cover up my redneck Join Date: May 2004 Location: Columbus OH Posts: 11,414	Re: th400 tranny spacers I sounds right. They would be "correcting" the driveline angle because the carrier bearing is further away and that would take some of the angle away. I don't know if it is a "factory " thing though, or an adjustment that someone made in a effort to solve a vibration or something. There are some "Longhorn" experts that may chime in here and know for sure. I will edit your Title and see if one comes along.

05-19-2008, 07:31 PM	#3
Green Machine Senior Member Join Date: Jul 2004 Location: Estherville, Iowa Posts: 3,371	Re: th400 tranny spacers Longhorn related? Don't know if this helps, but our 71 C20 came with a 3/8 spacer between the tranny and mount. It uses a TH350. We added a spacer on the 1970 to help the engine sit more level. __________________ 1968 C10 307 3spd Long Fleet ------ http://67-72chevytrucks.com/vboard/s...d.php?t=201103 1970 C10 305 Super T10 Long Fleet --- http://67-72chevytrucks.com/vboard/s...d.php?t=202285 1971 C20 383 TH350 Dana Posi ----- http://67-72chevytrucks.com/vboard/s...d.php?t=206894 2001 GMC Sierra 1500 C3 6.0

05-19-2008, 08:40 PM	#4
Longhorn Man its all about the +6 inches Join Date: Jan 2001 Location: Hilliard Ohio Posts: 2,690	Re: th400 tranny spacers Longhorn related? if I'm not mistaken, all big block trucks had a sppacer between the mount and the cross member. The only addition on the longhorn, is a spacer between the bottom of the frame rail to the tranny cross member due to the added height of the taller frame.

05-19-2008, 09:17 PM	#5
SOON2BLAZE Account Suspended Join Date: Aug 2005 Location: Southern UT Posts: 906	Re: th400 tranny spacers Longhorn related? Theres a set on ebay now ( no linky)

05-19-2008, 09:37 PM	#6
uncle Senior Member Join Date: Aug 2003 Location: Conyers,Ga. Posts: 7,288	Re: th400 tranny spacers Longhorn related? I think the first guy is talking about the spacer between the trans. and the trans. mount,not the crossmember.



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