help with tranny crossmeber clutch swap - The 1947 - Present Chevrolet & GMC Truck Message Board Network

rhd_c10 · 06-03-2011, 09:29 PM

I just got my 68 swb with a 4 speed straight 6...clutch when out so I need to drop the trans..not ready for the 5.3 swap yet......

My question is how do I drop my trans with out pulling the motor . it looks like the crossmember is riveted in..
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ETsC10 · 06-04-2011, 01:28 AM

Moving you for some more help...

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68gmsee · 06-04-2011, 09:46 AM

In my 68 GMC with 250 six and 3 speed saginaw I didn't have to mess with the crossmember. I have plenty of room to remove the transmission behind the engine.

forgot to add: I'll post a pic of mine from underneath for comparison.

68gmsee · 06-04-2011, 10:03 AM

Here's the pic of mine. Unbolt it all the way around including the engine mounts and slide it backwards.

IIRC the problem I encountered was the parking brake cable. It may be better if you remove it so it's not in the way. Also, use a small hydraulic jack and block of wood to hold the engine up and/or lowering it if you need to.

As you can see I just had to replace rear trans seal and speedometer bullet o ring for leaking...lol

javadoc · 06-04-2011, 10:38 AM

You can also drill out the rivets if you find that you need to remove that cross member. That's what I did, and just bolt it back in place.

rhd_c10 · 06-04-2011, 03:35 PM

Thanks for the help
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*blackedoutharley* · 06-04-2011, 07:10 PM

I assume that you're referring to the 4 speed granny gear transmission... which weighs a TON!

If possible just unbolt it from the bellhousing and move it back enough for the input shaft to clear the clutch.
Depending on the size clutch you should be able to remove and replace it from the bottom of the bellhousing.

06-03-2011, 09:29 PM	#1
rhd_c10 Registered User Join Date: May 2011 Location: Avondale,az Posts: 169	help with tranny crossmeber clutch swap I just got my 68 swb with a 4 speed straight 6...clutch when out so I need to drop the trans..not ready for the 5.3 swap yet...... My question is how do I drop my trans with out pulling the motor . it looks like the crossmember is riveted in.. Posted via Mobile Device

06-04-2011, 01:28 AM	#2
ETsC10 Hand Crafted C-10 Join Date: Aug 2006 Location: Burien, WA Posts: 5,180	Re: help with tranny crossmeber clutch swap Moving you for some more help... . __________________ . Forum Guidelines and Rules Buying and Selling Code of Conduct Become a Board Supporter! Truck FAQ Ellen... the boards artsy-fartsy, eclectic, truck-lovin' gal-member...

06-04-2011, 09:46 AM	#3
68gmsee Active Member Join Date: Jul 2007 Location: Centrally located between Houston, Austin and Waco. BCS area. Posts: 7,947	Re: help with tranny crossmeber clutch swap In my 68 GMC with 250 six and 3 speed saginaw I didn't have to mess with the crossmember. I have plenty of room to remove the transmission behind the engine. forgot to add: I'll post a pic of mine from underneath for comparison. Last edited by 68gmsee; 06-04-2011 at 09:47 AM.

06-04-2011, 10:03 AM	#4
68gmsee Active Member Join Date: Jul 2007 Location: Centrally located between Houston, Austin and Waco. BCS area. Posts: 7,947	Re: help with tranny crossmeber clutch swap Here's the pic of mine. Unbolt it all the way around including the engine mounts and slide it backwards. IIRC the problem I encountered was the parking brake cable. It may be better if you remove it so it's not in the way. Also, use a small hydraulic jack and block of wood to hold the engine up and/or lowering it if you need to. As you can see I just had to replace rear trans seal and speedometer bullet o ring for leaking...lol Attached Images Last edited by 68gmsee; 06-04-2011 at 10:04 AM.

06-04-2011, 10:38 AM	#5
javadoc Hey Watch this... Join Date: Sep 2007 Location: Parker, CO Posts: 414	Re: help with tranny crossmeber clutch swap You can also drill out the rivets if you find that you need to remove that cross member. That's what I did, and just bolt it back in place. __________________ What have I gotten myself into now? 1964 Chevy Stepside - 383 hydraulic roller Vortec ... a work in progress 2000 Volvo V70R - 340awhp, 22psi, meth-injected of Porsche-eating fun. The grocery-getter on steroids

06-04-2011, 03:35 PM	#6
rhd_c10 Registered User Join Date: May 2011 Location: Avondale,az Posts: 169	Re: help with tranny crossmeber clutch swap Thanks for the help Posted via Mobile Device

06-04-2011, 07:10 PM	#7
blackedoutharley Account Suspended Join Date: Jul 2007 Location: Plumas Lake, Ca. Posts: 1,009	Re: help with tranny crossmeber clutch swap I assume that you're referring to the 4 speed granny gear transmission... which weighs a TON! If possible just unbolt it from the bellhousing and move it back enough for the input shaft to clear the clutch. Depending on the size clutch you should be able to remove and replace it from the bottom of the bellhousing.



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