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#1 |
Registered User
Join Date: Nov 2018
Location: Albuquerque, NM
Posts: 17
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My crossmember section began today, which means soon I will have my front suspension off and will have the easiest opportunity to address my transmission crossmember (as I understand it must slide out the end of the frame with the crossmember removed). ‘74 C30 350 with the “four speed” (3+L) manual trans, swapping to 6.5 NV4500. Will my NV4500 mount to the stock transmission crossmember? Will the truck lay frame on stock trans xm? Should I/Do I have to switch it out for my 93 NV4500 crossmember? Thanks in advance.
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1974 C30 Dually Longbed Diesel swap- Not finished Airbags- Not finished Rust- Extensive and ongoing Offensive stickers- Many |
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#2 |
Registered User
Join Date: Dec 2012
Location: Temple City
Posts: 3,587
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Re: NV4500’s and Laying Frame
I have never air bagged a car to lay frame, but I have gotten close. Since I pancaked, and I'd a frame for drop vs buying parts.
The trans cross member is above the frame so it is not a issue. The issues you may encounter are the engine oil sump hanging below the frame, and the transmission sump. Or what ever it is called on a manual trans. When laying frame sometimes people have to raise the engine, and trans 1-2 inches to make sure they are above the frame. Depending of course on how they got there. What I liked to do was if I had the ability. Take the clip, and cab off. Set the engine, and tranny in place. After laying the frame on the floor. Set a piece of plywood under the pans. Then fabricate the mounts. This way everything is tucked up good. You still may want to JB weld thick sheet metal on the pans just in case you hit a speed bump wrong. I do this a lot with the way Chevy hangs the pan. It can take a good whack with out leaking. |
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#3 |
Post Whore
![]() ![]() Join Date: May 2015
Location: Alabama
Posts: 14,631
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Re: NV4500’s and Laying Frame
when i went from my sm465 to the nv4500 , i used the same crossmemeber...but had to move it back 2in if i remember right...the crossmember will come out of the frame rails by taking the brace pieces off and turning it at a angle..but its tight
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Mongo...aka Greg RIP Dad RIP Jesse 1981 C30 LQ9 NV4500..http://67-72chevytrucks.com/vboard/s...d.php?t=753598 Mongos AD- LS3 TR6060...http://67-72chevytrucks.com/vboard/s...34#post8522334 Columbus..the 1957 IH 4x4...http://67-72chevytrucks.com/vboard/s...63#post8082563 2023 Chevy Z71..daily driver |
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#4 |
Registered User
Join Date: Nov 2018
Location: Albuquerque, NM
Posts: 17
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Re: NV4500’s and Laying Frame
Any chance I could get a picture of that, possibly with some indication of ride height? Mine is currently dismounted but laying in the frame and drags every time I move the truck (hangs about 8” lower than the frame)
__________________
1974 C30 Dually Longbed Diesel swap- Not finished Airbags- Not finished Rust- Extensive and ongoing Offensive stickers- Many |
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#5 |
Post Whore
![]() ![]() Join Date: May 2015
Location: Alabama
Posts: 14,631
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Re: NV4500’s and Laying Frame
I'll get some tomorrow if I get home before dark..
__________________
Mongo...aka Greg RIP Dad RIP Jesse 1981 C30 LQ9 NV4500..http://67-72chevytrucks.com/vboard/s...d.php?t=753598 Mongos AD- LS3 TR6060...http://67-72chevytrucks.com/vboard/s...34#post8522334 Columbus..the 1957 IH 4x4...http://67-72chevytrucks.com/vboard/s...63#post8082563 2023 Chevy Z71..daily driver |
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#6 |
Registered User
Join Date: Nov 2018
Location: Albuquerque, NM
Posts: 17
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Re: NV4500’s and Laying Frame
I’d appreciate it. The ‘93 C2500 donor my 6.5 and NV4500 came out of was 11/9.5” static dropped and the thought of the trans lifting up over speed bumps still gives me the heeby-jeebies.
__________________
1974 C30 Dually Longbed Diesel swap- Not finished Airbags- Not finished Rust- Extensive and ongoing Offensive stickers- Many |
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#7 |
Post Whore
![]() ![]() Join Date: May 2015
Location: Alabama
Posts: 14,631
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Re: NV4500’s and Laying Frame
Rob...heres some pics of the nv4500...
1st pic shows none of the trans hangs below the frame...the next 3 are the best I could get of the crossmember without putting the truck on the lift...
__________________
Mongo...aka Greg RIP Dad RIP Jesse 1981 C30 LQ9 NV4500..http://67-72chevytrucks.com/vboard/s...d.php?t=753598 Mongos AD- LS3 TR6060...http://67-72chevytrucks.com/vboard/s...34#post8522334 Columbus..the 1957 IH 4x4...http://67-72chevytrucks.com/vboard/s...63#post8082563 2023 Chevy Z71..daily driver |
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#8 |
Registered User
Join Date: Nov 2018
Location: Albuquerque, NM
Posts: 17
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Re: NV4500’s and Laying Frame
Awesome, thanks. I don’t think I have those risers that hold the crossmember up like that, I’ll check around the shop and see if I ever did. I vaguely remember the one I have mounting to the bottom of the rail, but from what it sounds like I’ll be able to use whichever crossmember and still have the ability to space it up into the truck.
__________________
1974 C30 Dually Longbed Diesel swap- Not finished Airbags- Not finished Rust- Extensive and ongoing Offensive stickers- Many |
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Tags |
cross member, diesel 6.5, nv4500, swap, transmission |
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