View Full Version : Hot Rod Truck with IRS?
Dave Tabor
10-30-2025, 10:11 AM
Why is this not a FFR option?
I have a spare complete drivetrain here (with IRS diff) looking for a new home...
Dave
Gen III Type 65 #17
PNWTim
10-30-2025, 10:31 AM
Seems like the IRS should be an across the board offering. I didn't even know this was a thing.
Blitzboy54
10-30-2025, 12:42 PM
I had a similar thought. I doubt it would be that hard. I am guessing it's because the period look of a truck but if your going full beast mode there is no reason not too. Maybe they just don't sell enough of them.
Dave Tabor
10-30-2025, 02:05 PM
Looking at some build pictures - maybe it's the lack of rear fenders and the vertical bed walls - there's no room for an IRS wheel to arc upwards/inwards...
Dave
Gen III Coupe #17
edwardb
10-30-2025, 02:46 PM
Not the best picture. But the only one from my build that shows the 3-link setup available for the truck. The bed floor is already pretty high and overall not very deep. It's a little hard to judge because it's hanging at full droop. At ride height, no a lot of space under there. That might be it. Or perhaps it's a financial decision based on the number of units expected to be sold.
https://thefactoryfiveforum.com/attachment.php?attachmentid=150225&d=1625279287
Jeff Kleiner
11-08-2025, 05:44 PM
Why is this not a FFR option?
I have a spare complete drivetrain here (with IRS diff) looking for a new home...
Dave
Gen III Type 65 #17
Don’t get rid of it just yet… ;)
Jeff
narly1
11-09-2025, 09:56 AM
Don’t get rid of it just yet… ;)
Jeff
Yes, didn't Dave say something in passing about IRS being an upcoming option for the HR truck in one of his recent videos?
Earl
Jeff Kleiner
11-09-2025, 10:25 AM
Yes, didn't Dave say something in passing about IRS being an upcoming option for the HR truck in one of his recent videos?
Earl
We had several conversations about it while at SEMA last week.
Jeff
fact5racer
11-10-2025, 02:55 PM
I guess I was talking in my sleep while sharing a room with Keiner at SEMA :rolleyes:
FFinisher
11-10-2025, 06:27 PM
Yes, didn't Dave say something in passing about IRS being an upcoming option for the HR truck in one of his recent videos?
Earl
He mentioned they built 1 and that the R+D resources were reallocated. He did not say it was coming.
.
Dave Tabor
11-11-2025, 10:42 AM
Don’t get rid of it just yet… ;)
Jeff
Ok, I'm hopeful.
If a solid axle and diff fit, then an IRS diff/half-shafts should fit.
IRS should have less/little wheel arc compared to a solid axle so my thinking earlier is wrong.
Dave
Gen III Coupe #15
FFinisher
11-11-2025, 12:12 PM
Ok, I'm hopeful.
If a solid axle and diff fit, then an IRS diff/half-shafts should fit.
IRS should have less/little wheel arc compared to a solid axle so my thinking earlier is wrong.
Dave
Gen III Coupe #15
IRS Center section and Spindles work, the spindles are modified but they work. Half Shafts will be too long. Unless they change the Control arms. which I kinda doubt. the Cobra and Daytona coupe are narrower than the mustang and the IRS kit for them comes with the half shafts .
IF they do it at all.
A hot rod truck with IRS would be my next build if they offered it. Just sayin.
fact5racer
12-17-2025, 04:58 PM
Me too!