Is a transmission crossmember neccessary? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Andy4639 · 10-26-2017, 11:35 AM

The GM thinking back in the day was for a stock truck with stock HP rating!

To put this in a modern day truck I think you would be fine using both. Most of these trucks aren't stock motors any more. If it was stock then why would you ask to begin with so I assume it's a modified truck...correct.

Using both would be to me a good choice. Do you need both maybe not but it couldn't hurt. Torqueing of the motor and trans as stated before shouldn't effect the mounting points that is what they are for to begin with. The GM engineer's said it wasn't needed for the HP of the truck.
If you go with the longer 5 speeds and over drives I would think twice about adding it for the added weight. Again GM engineer didn't know these type transmissions where going to be installed in these truck.

10-26-2017, 11:35 AM	#1
Andy4639 Old member Join Date: Jan 2002 Location: Liberty, & Garden City S.C. , U.S. Posts: 19,945	Re: Is a transmission crossmember neccessary? The GM thinking back in the day was for a stock truck with stock HP rating! To put this in a modern day truck I think you would be fine using both. Most of these trucks aren't stock motors any more. If it was stock then why would you ask to begin with so I assume it's a modified truck...correct. Using both would be to me a good choice. Do you need both maybe not but it couldn't hurt. Torqueing of the motor and trans as stated before shouldn't effect the mounting points that is what they are for to begin with. The GM engineer's said it wasn't needed for the HP of the truck. If you go with the longer 5 speeds and over drives I would think twice about adding it for the added weight. Again GM engineer didn't know these type transmissions where going to be installed in these truck. __________________ 1971 LWB Custom, 6.0LS & 4L80E, Speedhut.com GPS speedometer & gauges with A/C. 20" Boss 338's Grey wheels 4 wheel disc brakes. My Driver Seeing the USA in a 71 Upstate SC GM Truck Club 2013,14 and 2016 Hot Rod Pour Tour http://upstategmtrucks.com/ Get out and drive the truck this summer and have some fun! It sucks not being able to hear! LWB trucks rule, if you don't think so measure your SWB! After talking to tech support at Air Lift I have found out that the kit I need is 60811. Per the measurements I gave them. Ride height of truck inside spring and inside diameter of springs.



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