Rat Rods Rule / Undead Sleds - Hot Rods, Rat Rods, Beaters & Bikes... since 2007!

Go Back   Rat Rods Rule / Undead Sleds - Hot Rods, Rat Rods, Beaters & Bikes... since 2007! > Frame/Suspension/Brake... Talk & Q&A

Frame/Suspension/Brake... Talk & Q&A All things... Frame/Suspension/Brake

Thread Tools Display Modes
Old 09-10-2017, 08:41 AM
serrata serrata is offline
Join Date: May 2012
Location: Orlando, FL
Posts: 86
Default Which portions of the frame should be "removable?"

I'm in the middle of making motor mounts and cross-members on my frame.

The engine and trans that I'm using are huge. 7.3L turbo diesel and 4R100 trans with 4wd transfer case. I recognize the need to make everything beefy to handle this weight.

I'm also making this thing as low as I possibly can. The oil pan and trans pan hang very low, so my motor mounts will need to be pretty tall.

4 link suspension front and rear.

I plan on building motor mounts from 4"x4" stock @.25" thickness and attaching at an angle to the frame.

(1) Can I make a permanent cross-member under the engine, as long as I have a couple inches of clearance under the oil pan? Then I would have more structure for the engine mounts to weld to.

(2) Are there any places under the front of the engine that I should not place a cross-member under? There is plenty of clearance under the fan.

(3) Transmission cross-member: I assume that I would need this removable, since it would likely be difficult to remove the transmission for service without removing the body if I don't, right?

(4) Overall assumption for future maintainability: Engine would need to come out from the top, while transmission and transfer case would come out from the bottom, right?
Attached Images
File Type: jpg 20170902_223634.jpg (124.7 KB, 102 views)
File Type: jpg 20170828_235438.jpg (132.0 KB, 101 views)
Reply With Quote
Old 09-10-2017, 06:42 PM
akatao akatao is offline
Rusty Rat Rodder
Join Date: Aug 2013
Location: mass.
Posts: 423

sounds right to me
Reply With Quote
Old 09-10-2017, 07:00 PM
Skip's Avatar
Skip Skip is offline
Rusty Rat Rodder
Join Date: Jun 2010
Location: Portland, OR
Posts: 2,746

having done a few engine swaps, I have found the oil drain plug in difficult-to-access locations at times. Might want to check that.
39 Ford PU Build. http://ratrodsrule.com/forum/showthread.php?t=36459

The thing about a '39 Ford pick-up is that that ugly grille kinda' grows on ya' after a while.

Not taking anything too seriously.
Reply With Quote
Old 10-15-2017, 08:39 PM
Torch's Avatar
Torch Torch is offline
Extremely dangerous with a torch!!!
Join Date: Jul 2008
Posts: 1,622

Reply With Quote
Old 10-15-2017, 11:32 PM
MercuryMac's Avatar
MercuryMac MercuryMac is offline
Builder Junky!
Join Date: Jan 2013
Location: Northern Alberta, Canada.
Posts: 2,754

I like your idea of putting a permanent crossmember under the motor. Maybe cut the curved one out of the donor truck and weld it in, motor mounts and all. The reason I know you'll need a crossmember is, the first time I put a real torque monster in a '56 Ford pickup, I didn't put a crossmember in there, just welded the motor mounts slanty-wize up the motor. This worked alright if I drove like a little old lady, but I was NO lady, so I twisted up the frame rails quite a bit every time I stomped on the gas pedal. This let the motor twist up and flop around in there too much. Anyhow I vote for a crossmember under the motor, even though you have square tube for frame rails and they are a way less flexible.
Reply With Quote
Old 10-16-2017, 08:37 AM
sneakysnake's Avatar
sneakysnake sneakysnake is offline
"There’s nothing new in originality"
Join Date: Dec 2009
Location: Oklahoma
Posts: 2,611

The main thing when fabing is think ahead so something doesn't get in the way of another or you block something that needs to be gotten to.Then remember that at some time it may all have to come apart so make things to be able to be remove with least amount work.I had to pull the trans out of mine and it was either cut the cross member or lift the cab I now have a removable cross member on my trans. Lol
'46 Build Link

'53 Build Link

"Its a catastrophic success"
Reply With Quote


Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

All times are GMT -5. The time now is 07:06 PM.

Powered by vBulletin® Version 3.8.8
Copyright ©2000 - 2019, vBulletin Solutions, Inc.
Rat Rods Rule Inc.