Can i solid mount my transmission? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

lyrikz · 07-21-2008, 11:23 PM

Im making a tranny crossmember and wanted to know if i could mount the transmission DIRECTLY to the crossmember. Its a th400 trans with 454 if it matters. It will be driven at least 2/3 times a week. Is it necessary to have the rubber mount in between??? Anyone know where i can get the rubber mount portion if it is necessary???

Spray-Bomb · 07-21-2008, 11:31 PM

I wouldnt unless you solid mount you engine too

lyrikz · 07-22-2008, 12:35 AM

Quote:

Originally Posted by Spray-Bomb

I wouldnt unless you solid mount you engine too

Any ideas where i can pick one of the rubber mounts up? Im looking at these aftermarket crossmembers and none of em seem to come with the rubber mount portion.

Longhorn Man · 07-22-2008, 12:37 AM

any parts store can get it.
If you mou nt the tranny solid, but not the engine, you WILL break the tranny in 2.

stllookn · 07-22-2008, 12:51 AM

Lyrikz, I have a parts truck with cross member and rubber mount for a TH400 if you want to pull it. I am on the East Hill in Kent.

Is your truck a 3/4 ton? I might have some other parts you may have some interest in as well.

Ackattack · 07-22-2008, 01:24 AM

I got a polyurethane tranny mount from summit.

70rs/ss · 07-22-2008, 12:18 PM

I'd do the urethane mounts as the BBC has a bit o torq and over time will tear the OE replacement types. As for the solid mounting I agree with the above, only if the motor is and then only in a race set-up.

**steelhorse** · 07-22-2008, 12:19 PM

Agree with above if you solid mount it the case will probably crack.

lyrikz · 07-22-2008, 12:48 PM

Quote:

Originally Posted by stllookn

Lyrikz, I have a parts truck with cross member and rubber mount for a TH400 if you want to pull it. I am on the East Hill in Kent.

Is your truck a 3/4 ton? I might have some other parts you may have some interest in as well.

I bought some metal to make my own tranny crossmember. Im going to pick up a rubber mount and at least TRY this. If it doesnt work i will let you know.

Longhorn Man · 07-22-2008, 08:03 PM

Quote:

Originally Posted by steelhorse

Agree with above if you solid mount it the case will probably crack.

no probably about it... it WILL break the tranny.

lyrikz · 07-22-2008, 08:05 PM

Quote:

Originally Posted by Longhorn Man

no probably about it... it WILL break the tranny.

I will definetly have the rubber mount. I will post a quick pic of the Xmember im making.

07-21-2008, 11:23 PM	#1
lyrikz PITbut Join Date: Sep 2007 Location: monroe washington Posts: 3,052	Can i solid mount my transmission? Im making a tranny crossmember and wanted to know if i could mount the transmission DIRECTLY to the crossmember. Its a th400 trans with 454 if it matters. It will be driven at least 2/3 times a week. Is it necessary to have the rubber mount in between??? Anyone know where i can get the rubber mount portion if it is necessary???

07-21-2008, 11:31 PM	#2
Spray-Bomb Texas Big Wig Join Date: Jan 2007 Location: Mineola, Texas Posts: 5,620	Re: Can i solid mount my transmission? I wouldnt unless you solid mount you engine too __________________ Just not low enough... ----------------------------- Sinister Killer

07-22-2008, 12:37 AM	#4
Longhorn Man its all about the +6 inches Join Date: Jan 2001 Location: Hilliard Ohio Posts: 2,693	Re: Can i solid mount my transmission? any parts store can get it. If you mou nt the tranny solid, but not the engine, you WILL break the tranny in 2.

07-22-2008, 12:51 AM	#5
stllookn Saving 1 truck at a time! Join Date: Aug 2001 Location: Kent, WA Posts: 6,465	Re: Can i solid mount my transmission? Lyrikz, I have a parts truck with cross member and rubber mount for a TH400 if you want to pull it. I am on the East Hill in Kent. Is your truck a 3/4 ton? I might have some other parts you may have some interest in as well. __________________ '68 C20 Longhorn 50th Anniversary 400/TH400 '68 C20 Longhorn 50th Anniversary 468/TH400w/buckets '72 C20 Halfhorn (Longhorn w/o cab and front clip) '69 Flxible Cruiser (look up ugly in the dictionary) Last edited by stllookn; 07-22-2008 at 12:53 AM.

07-22-2008, 01:24 AM	#6
Ackattack Senior Member Join Date: Aug 2002 Location: Valley Center KS Posts: 3,525	Re: Can i solid mount my transmission? I got a polyurethane tranny mount from summit. __________________ Project Bruiser: 68 Pro-Touring C-10 5.3L / 4L60E Project Ironhide: 97 GMC Crew Cab 4x4 Cummins SOLD: '69 GMC 1/2T SWB TBI'd: Project No Buck Assembly Manual Index Sign up Thread!!! Factory Service Manual Index

07-22-2008, 12:18 PM	#7
70rs/ss Registered User Join Date: Dec 2004 Location: Northern AZ Posts: 7,271	Re: Can i solid mount my transmission? I'd do the urethane mounts as the BBC has a bit o torq and over time will tear the OE replacement types. As for the solid mounting I agree with the above, only if the motor is and then only in a race set-up.

07-22-2008, 12:19 PM	#8
steelhorse Senior Member Join Date: Apr 2008 Location: Franklinton NC Posts: 1,309	Re: Can i solid mount my transmission? Agree with above if you solid mount it the case will probably crack.



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