3spd manual trans crossmember-where is it? - Page 2 - The 1947 - Present Chevrolet & GMC Truck Message Board Network

burnin oil · 02-02-2013, 06:45 PM

Quote:

Originally Posted by MARKDTN

Just FYI most class-8 trucks (18 wheeler) mount the engine to the frame with 4 point mounts and the transmission is just mounted to it with no support. If they do have a support, it is usually just a plate with some springs.

I have seen a ton of Eatons with mounts. Top of the rear box has 2 5/8" studs that help support it from above. Then 2 mounts on the flywheel adapter and a mount on the front of the motor. It is pretty common to hang the trans of the rear with no adapter.

54belair · 02-02-2013, 10:31 PM

When I bought my truck, it had originally been a std. trans. truck, the p.o. changed it to a 700r--torched out "most" of the original std. crossmember and added some rear cross member out of something for the rear of the 700r.
I am changing over to a muncie m 20. Ill be using the auto crossmember from gmc pauls at the rear of the trans.
Ive built several cars down thru the years and I really dont like the trans hanging out in space. Just my opinion.

2002yanks · 03-20-2013, 02:30 AM

i had a question about this crossmember in the suspension fourms. so could one get an auto aftermarket one and place it at the back of the tranny and remove this one? i ask because i want to lay frame(or close to it) and this one is clearly in the way. i never noticed a set of holes there(but i wasnt looking either).

Tx Firefighter · 03-20-2013, 06:23 AM

If you have a Saginaw 3 speed, there should be a provision for the rear mount cast into the case, allowing you to use a rear crossmember.

If you have a Muncie 3 speed, there won't be mount provisions there.

b.eddy's72 · 03-20-2013, 07:20 AM

Well I have to say that I looked at all the post but the only one that caught my attention was the one with the nice pretty clean fresh frame. And they say men are visual creatures............................

dhaymaker · 03-20-2013, 11:24 AM

Quote:

Originally Posted by quick60

Wow. Seems like a weak link.

Would it hurt to add one?

Quote:

Originally Posted by SS Tim

Can't see why you think it needs it. The same arangement works fine on C30/400/4-speed trucks with a 10,000gvw.

I was just reading through the thread and immediately thought of my C-30 with the much heavier 4-speed hanging off the bellhousing...and no crossmember!

02-02-2013, 10:31 PM	#27
54belair Registered User Join Date: Mar 2011 Location: bolivar, mo Posts: 839	Re: 3spd manual trans crossmember-where is it? When I bought my truck, it had originally been a std. trans. truck, the p.o. changed it to a 700r--torched out "most" of the original std. crossmember and added some rear cross member out of something for the rear of the 700r. I am changing over to a muncie m 20. Ill be using the auto crossmember from gmc pauls at the rear of the trans. Ive built several cars down thru the years and I really dont like the trans hanging out in space. Just my opinion. __________________ 1997 shortie stepside 1968 short stepside 1966 mustang 1966 chevelle ss Dont always go the cheapest route--You can save yourself into the poorhouse! My Build Thread http://67-72chevytrucks.com/vboard/s...d.php?t=489030

03-20-2013, 02:30 AM	#28
2002yanks Registered User Join Date: Sep 2010 Location: Auburn NY Posts: 1,470	Re: 3spd manual trans crossmember-where is it? i had a question about this crossmember in the suspension fourms. so could one get an auto aftermarket one and place it at the back of the tranny and remove this one? i ask because i want to lay frame(or close to it) and this one is clearly in the way. i never noticed a set of holes there(but i wasnt looking either). __________________ My build thread!! http://67-72chevytrucks.com/vboard/s...d.php?t=474018

03-20-2013, 06:23 AM	#29
Tx Firefighter Watch out for your cornhole ! Join Date: Jun 2003 Location: Azle, Texas Posts: 14,162	Re: 3spd manual trans crossmember-where is it? If you have a Saginaw 3 speed, there should be a provision for the rear mount cast into the case, allowing you to use a rear crossmember. If you have a Muncie 3 speed, there won't be mount provisions there.

03-20-2013, 07:20 AM	#30
b.eddy's72 Registered User Join Date: Nov 2009 Location: WEATHEROFRD, TX Posts: 164	Re: 3spd manual trans crossmember-where is it? Well I have to say that I looked at all the post but the only one that caught my attention was the one with the nice pretty clean fresh frame. And they say men are visual creatures............................ __________________ 72 Chevy LB, LS in the works, 4L80, Grandfather bought it brand new. 66 GMC Short Step, 84 Front Suspension, many more mods to come 67 Chevy 3/4 Ton, 327, Auto, Factory A/C Ya must have been movin cause I was haulin a*$ when I passed you



Register or Log In To remove these advertisements.

Register or Log In To remove these advertisements.